How To Insert Null Values Into A DataBase Field
May 9, 2005
I have a function that updates a table in sql server
If a field is left blank I want the database field set to Null. I use:sqlCmd.Parameter.Add("@somefield, someintvalue) to pass all my values to the database.
if someintvalue is null I want to set @somefield to dbnull
How can I do this? I get errors if I submit a null integer when there is a foreign key constraint. What is the best way to handle this? should I just make all parameters objects? so that I can set them to DBNull.Value?
Also on a side note, when you are populating fields from a datatable, is there a better way to set the values (i.e. of a textbox) than cheking for DBNull before assigning?
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Mar 1, 2007
I am importing an Access .mdb file into MS SQL server, and empty fields where the default value is "", change into NULL. This is a problem when I re-export a result set and have to apply a procedure to clean these values. Is there a way to eliminate this? . . . . and what have I missed?
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Apr 22, 2008
Hi All,
I want to show 0, if the field contains NULL values.
I use the following expression.
=IIf(Fields!MTD_TotGrossBKCOAmt.Value = "NULL" , SUM(Fields!MTD_TotGrossBKCOAmt.Value), 0 )
But this works if the field contains only NULL values.
If it has a value, then it shows as #Error
Can anyone tell me how to make this work?
Thanks
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Aug 29, 2006
I cannot in the life of me understand what goes wrong here... In a webapplication (C#.NET) I traced an inability to retrieve existing records to SQL Server, where I cannot do the same either. The problem is that in the parameterized query, some fields can be null, and thus when the corresponding fields in the database record are null also, they should be selected. But this won't happen for some reason.
I wrote a test SQL statement that gives me the same bogus:
DECLARE @institution int, @collection int, @serialnr int, @subnr nvarchar(50)SET @institution = 1 SET @collection = 1SET @serialnr = 240 SET @subnr = NULLSELECT ID, Institution, Collection, SerialNumber, SubNumber, AccessionYear, Sagsnummer, DanekraeNr, TaxonIdentified, Stratigraphy, TypeStatus, PlacementRoom, PlacementCabinet, PlacementDrawer, UnitNotesFROM SpecimensWHERE (Institution = @institution) AND (Collection = @collection) AND (SerialNumber = @serialnr) AND (SubNumber = @subnr)
Now there is at least one row with corresponding fields values (1, 1, 240, null), but it won't be selected! What is wrong!?
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Feb 13, 2007
Hi
I have a really simple query which i can't figure out why its not working. I have a table called 'ADMIN' which has a datetime field called 'date_edited'. Because the majority of records have never been edited, i have allowed null values and they are filled with 'NULL' in each record. How ever, when i try:
SELECT * FROM ADMIN WHERE date_edited = NULL
I get no records, but i can see and know i have hundreds! I know i'm doing somthing really stupid, but for life of me can't figure it out! :eek:
thanks
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Jan 28, 2005
Hi all
Iam having some problems with null values
try
{
cmd.Parameters["@fmv"].Value = Convert.ToDecimal(TextBox13.Text);
}
catch
{
cmd.Parameters["@fmv"].Value =System.Data.SqlTypes.SqlDecimal.Null;
}
for Empty Textbox values
i am getting the following error,
System.Data.SqlTypes.SqlNullValueException: Data is Null. This method or property cannot be called on Null values.
My Database is allowed to accept null values.
System.Data.SqlType.SqlDatetime.Null works but SqlDecimal.Null does not work.
Could any one help me with this?
Thanks
Raj
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Jun 18, 2004
I have a checkbox on my webform that is bound to a bit field in my SQL table. I'm fine as long as I've got the bit field set to 0 or 1, but if the field is NULL, the checkbox throws an exception during the databind.
Is there any way to handle this without removing the data binding and manually setting the value (ie: some way to intercept it before the exception gets thrown and then setting the field value in the dataset)?
Thanks!
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Jun 16, 2012
Ok I have upgraded my works database from a poorly designed Access database to a SQL database. The previous system allowed NULL values and duplicates to be inserted into a field that should NOT ALLOW NULL Values or duplicates. Therefore, this issue has now been moved across to my new system as I cannot set these constraints on the field that has multiple NULL values.
My solution would be to use a sequential operator, so whatever = NULL would be changed to a sequential number that us as administrators would know was a bogus number starting at something like = 999999900 counting up from that. There are only 250 records that would require updating.
To make things more interesting this field is not a integer type, its a Nvarchar type as its a Hardware ID. Both numerical and characters are require.
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Jul 2, 2007
I need to insert a null valvue when the user does not impute any text.
here is my code
If cell_phone.Text = "" Then
cell_phone.Text = "dbnull.value"
End IfDim mySqlConnection As New SqlConnection
mySqlConnection.ConnectionString = ConfigurationManager.ConnectionStrings("Call_ListConnectionString").ConnectionString
Dim strSQL As String = "INSERT INTO Employees(Clock_ID, Last_Name, First_Name, Cell_Phone, Home_Phone, Work_Phone, Email, Primary_Day_Phone, Primary_Night_Phone, Blackberry_Number) VALUES ('" & clock_id.Text & "','" & last_name.Text & "','" & first_name.Text & "','" & work_phone.Text & "','" & home_phone.Text & "','" & cell_phone.Text & "','" & email.Text & "','" & prime_day_lst.SelectedValue & "','" & prime_night_lst.SelectedValue & "','" & blackberry.Text & "')"Dim mySqlCommand As New SqlCommand(strSQL, mySqlConnection)
mySqlConnection.Open()
mySqlCommand.ExecuteNonQuery()
mySqlConnection.Close()
THanks
Mike
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Dec 11, 2007
hi all!I have a task, for example, to create a record for bill. I have table which represents this bill entity (Bill_ID, Amount, CreationDate, ExposureDate, PaymentDate)In table definition date fields allow null. I would like to create bill, which means insert record: (new_bill_id, 1000, 2007.12.11, null, null) But it couses exception. Smth like: System.Data.SqlTypes.SqlTypeException, date should be not null. How could I do it?Please advice!
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Jun 5, 2006
Hi I'm using DetailView and I have a text box which show the date. I have formated the date as shortDate {0:d} format. I want to insert/update null if that text box is empty.
I have tried putting null value in my Update statement in sqlDataSource. And I'm getting error saying can't convert varchar to smalldatetime.
If I don't set null value as above, some large date (01/01/2033) has been inserted in my database.
Can anyone help me?
Moe
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Jan 8, 2005
Hello everyone,
I am using DTS to transform data from foxpro.when it meets the date of NULL,it fails and says"Insert Error , column 4( 'Coloumn_name ',DBTYPE_DBTIMESTAMP), Status 6 data overflow ".
And then i try to open the DTS Transform Data task and do a preview of the data from the 'Source' side.The Null values are treated as "1899-12-30".
After reading something ,i try to write an ActiveX scripting Task to solve this problem using the function of "IsDate()",but it fails with exceptions.
Now I don't know what to do.could anyone give me some suggestion?Anything will be appreciated!ThankX in advance!
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Oct 20, 2006
Im trying to setup a SQL server 2000 database to use membership & roles. Running aspnet_regsql.exe gives me the following errorsSetup failed.Exception:An error occurred during the execution of the SQL file 'InstallCommon.sql'. The SQL error number is 515 and the SqlException message is: Cannot insert the value NULL into column 'Column', table 'tempdb.dbo.#aspnet_Permissions_________________________________________________________________________________________________000000008000'; column does not allow nulls. INSERT fails.Warning: Null value is eliminated by an aggregate or other SET operation.The statement has been terminated.----------------------------------------Details of failure----------------------------------------SQL Server: Database: [AddressVerification]SQL file loaded:InstallCommon.sqlCommands failed:CREATE TABLE #aspnet_Permissions( Owner sysname, Object sysname, Grantee sysname, Grantor sysname, ProtectType char(10), [Action] varchar(20), [Column] sysname)INSERT INTO #aspnet_PermissionsEXEC sp_helprotectIF (EXISTS (SELECT name FROM sysobjects WHERE (name = N'aspnet_Setup_RestorePermissions') AND (type = 'P')))DROP PROCEDURE [dbo].aspnet_Setup_RestorePermissionsSQL Exception:System.Data.SqlClient.SqlException: Cannot insert the value NULL into column 'Column', table 'tempdb.dbo.#aspnet_Permissions_________________________________________________________________________________________________000000008000'; column does not allow nulls. INSERT fails.Warning: Null value is eliminated by an aggregate or other SET operation.The statement has been terminated. at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async) at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) at System.Data.SqlClient.SqlCommand.ExecuteNonQuery() at System.Web.Management.SqlServices.ExecuteFile(String file, String server, String database, String dbFileName, SqlConnection connection, Boolean sessionState, Boolean isInstall, SessionStateType sessionStatetype)Ive run this many times on other servers and have never come across this problem before. Has anyone else ? Does anyone know the cause and if there is a fix ??** I am logged in with full admin privaliges tiaMark.
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Jan 5, 2004
- I'm a Novice -
I'd like to use an insert command to insert whatever data that is on the unbound form. The first three fields are required and I check those values prior to executing the code below. But some fields may be null.
Dim strSQL as string
.
.
code
.
.
strSQL = "INSERT INTO tblCase " & _
"(Case_SiteName, " & _
"Case_PatientSequenceNumber, " & _
"Case_PatientInitials, " & _
"Case_DOB, " & _
"Case_ProcedureDate, " & _
"Case_Investigator, " & _
"Case_Institution, " & _
"Case_Value) " & _
"VALUES ('" & Me.cboSiteName & "', " & _
Me.txtPatientNumber & ", '" & _
Me.tbxPatientInitials & "', '" & _
Me.tbxPatientDOB & "', '" & _
Me.tbxProcDate & "', '" & _
Me.tbxInvestigator & "', '" & _
Me.tbxInstitution & "', " & _
Me.grpValue & ");"
CurrentProject.Connection.Execute strSQL
But, when any of the last four are unanswered, i get an error. Any, or all of the last four can be blank. Any suggestions?
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Mar 20, 2008
Hi,
I am facing problem while inserting a Null value into a smalldatetime datatype field in sql server 2000 using code in vb 6.0
Error as : Type mismatch.
Kindly let me know how to insert Null or blank (dtDate = "") into a column.
Regards,
Srinivas Alwala
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Feb 26, 2008
I'm sorry, this question has a pretty long preamble, but bear with me as this will fully explain my problem, and save a number of clarification questions.I am using Visual Web Developer 2005 Express, with SQL Server 2005. After reading a Microsoft article saying that it was much better to use a three tier architecture with data adapters than to write explicit queries, I have used this approach extensively, and generally it works very well. Typical code patterns are: - Dim taPassenger As New ShippingTableAdapters.VPassengerTableAdapter Dim tbpassenger As Shipping.VPassengerDataTable Dim trpassenger As Shipping.VPassengerRow ..... ' to process all passengers from a voyage: - tbpassenger = taPassenger.GetDataByVOYid(Voyageid) For Nbr As Integer = 1 To tbpassenger.Count trpassenger = tbpassenger(Nbr - 1) ' I now have the row available in properly-typed fields, eg trpassenger.vpxName ... Next ' to read and process a single passenger tbpassenger = tapassenger.GetDataByVPXid(VPXid) trpassenger = tbpassenger(0)The table adapter has been created with Insert,Update, Delete methods. Thus you can assign values to row fields, and then update the row: - trpassenger.VPXName = "New Name" .... tapassenger.update(trpassenger)There are actually several overloads of the update method: you could have written a field list, like this, where the names (VPXid etc) would be defined in my program as variables of the appropriate type for the corresponding column. tapassenger.update(VPXid, VPXName, VPXAge, ....HOWEVER, this doesn't work properly if you have non-string data that could be null. Thus if the fourth field is a foreign key that could be null, if you write Dim VPXVoyId as Nullable(of GUID) VPXVoyid = nothing tapassenger.update(VPXid, VPXname, VPXAge, VPXVoyid, ...or Trpassenger.VPXVoyid = Nothing tapassenger.update(trpassenger) you do NOT put a null value into the database. Instead you store a value of "00000000-0000-0000-0000-000000000000". You can solve this annoying problem in two ways: -A. If you will ALWAYS be storing a null value at this point of your program, then simply write the update statement like this: - tapassenger.update(VPXid, VPXname, VPXAge, Nothing, ...Here "Nothing" actually means "DBNull" even though it doesn't mean this when used in a normal VB assignment (and neither does DBNull).B You can use the SetxxxxNULL method: - If trpassenger.VPXVoyid = nothing then trpassenger.SetVPXVoyidNull End If tapassenger.update(trpassenger) Thus when the program logic is complex and there are many paths to the update statement I will often put statements such as this in front of the update statement, using SetxxxxxNull for all non-string values that may be null. You don't need to worry about string values because the Nullvalue property can be used to simply say that Null values are empty, and it all works properly, but for reasons unknown Microsoft have prohibited this for other data types. Now at last we get to my question, which is "How do I do the equivalent for an Insert?" tapassenger.insert does not have any overloads, and the only form is tapassenger.insert(field list). But this creates the problem above: if VPXVoyid = nothing then I insert the not-null value of "00000000-0000-0000-0000-000000000000". If I COULD use the form tapassenger.insert(trpassenger), then I'd have another problem: if you haven't set trpassenger (for example with trpassenger = tbpassenger(0)) then it will not exist, so you will get an exception when you try to reference it. Yet you can't write If isnothing(trpassenger) then trpassenger = new shipping.vpassengerrow) (I've tries this both as an assignment, and as a Dim statement) end ifSo far I can think of only two solutions, both awful: -a/ Use multi-choice logic to choose an appropriate insert statement. If there is only one or two possibly-null fields, I could write:- If field4 = nothing then trpassenger.insert (VPXid, VPXname, VPXAge, Nothing, .. However if there is more than one possibly-null field, you need (2 to the power of nbr-of-possibly-null-fields) insert statements, with of course a lot of testing to choose which oneb/ I could insert the record with nulls, then read it back and update it. Surely there is a better way! Help! Thank you, Robert Barnes.
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Jan 15, 2008
Hi all,
I have a projects table with 2 foreign key fields that both link to the same employees table because a project has a Package Engineer (PkgEngineerID) and a Contract Administrator (PkgContrAdmin). When I try to insert a record with null values for either or both of these foreign keys I get an error:
The data in row xxx was not commited. The record can't be added or changed. Referential integrity rules require a related record in table 'tblEmployees'. The transaction ended in the trigger. The batch has been aborted.
An insert statement for the above would look something like the following:
INSERT INTO tblPackages (PkgNo, PkgName, PkgEngineerID, PkgContrAdmin, PkgRemark)VALUES (1234, 'My Package', NULL, NULL, 'My Package remark')
And the create table statements are:
USE [PASSQL]GO/****** Object: Table [dbo].[tblPackages] Script Date: 01/15/2008 23:25:26 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOCREATE TABLE [dbo].[tblPackages]( [ID] [int] IDENTITY(1,1) NOT NULL, [PkgNo] [nvarchar](20) NULL, [PkgName] [nvarchar](255) NULL, [PkgEngineerID] [int] NULL, [PkgContrAdmin] [int] NULL, [PkgRemark] [nvarchar](255) NULL, [upsize_ts] [timestamp] NULL, CONSTRAINT [aaaaatblPackages_PK] PRIMARY KEY NONCLUSTERED ( [ID] ASC)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]) ON [PRIMARY]GOALTER TABLE [dbo].[tblPackages] WITH NOCHECK ADD CONSTRAINT [FK_tblPackages_tblEmployees] FOREIGN KEY([PkgEngineerID])REFERENCES [dbo].[tblEmployees] ([ID])GOALTER TABLE [dbo].[tblPackages] CHECK CONSTRAINT [FK_tblPackages_tblEmployees]GOALTER TABLE [dbo].[tblPackages] WITH NOCHECK ADD CONSTRAINT [FK_tblPackages_tblEmployees1] FOREIGN KEY([PkgContrAdmin])REFERENCES [dbo].[tblEmployees] ([ID])GOALTER TABLE [dbo].[tblPackages] CHECK CONSTRAINT [FK_tblPackages_tblEmployees1]
And:
USE [PASSQL]GO/****** Object: Table [dbo].[tblEmployees] Script Date: 01/15/2008 23:28:01 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOCREATE TABLE [dbo].[tblEmployees]( [ID] [int] IDENTITY(1,1) NOT NULL, [EmpName] [nvarchar](255) NULL, [EmpShort] [nvarchar](255) NULL, [upsize_ts] [timestamp] NULL, CONSTRAINT [aaaaatblEmployees_PK] PRIMARY KEY NONCLUSTERED ( [ID] ASC)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]) ON [PRIMARY]
Any ideas on how to accomplish this would be great!
Thanks in advance!
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Nov 29, 2000
Data from as400 imports into SQL with blank fields which is the way as400 outputs records. How can you insert previous record of data null or blank field. ex:
ONETWO
a1
2
3
b1
2
3
Would want:
ONETWO
a1
a2
a3
b1
b2
b3
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Jul 20, 2005
Hi everyone!I am working with Delphi v7 and MS SQLServer.I am trying to insert data in a table with a SQL sentence. Some of thefields of my table are type char or varchar, and they can have nullvalues.¿What do i have to write in the SQL sentence to insert a null value inthose fields?I tried with '', an empty String, but it doesnt work, the tablesstores an empty String (logical :-)).In the SQLServer GUI you have to press CTRL + 0 to insert a NULLvalue, but how can i tell this to the SQLServer through a SQLSentence?Well, thank you very much.
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Jun 6, 2008
I have a table adapter for one of my SQL2005 tables, and in two different fields I accept a date time. Now 99% of the times, new rows to this table will be filled out using DateTIme.Now(), as a Time Stamp is what I'm going for.
Here is the line of code in question...cops_current_data_adapter.Insert(ProductOrder, Convert.ToInt16(Session["StationId"].ToString()),
PartNumber, DateTime.Now, DateTime.Now, Convert.ToInt16(qty), 0);
The second DateTime.Now is the one that can be null, and it's throwing a formatting error everytime I try and drop it in there. It's a FormatException, and there's not much more to the example except unhelpful tips like be careful when conveting a string to a dateTime, which I'm not doing. Needless to say for the code to compile, and then throw a Format error at runtime is a bit frustraiting.
Any suggestions would be most appreciated
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Jan 25, 2008
I have a pivot transform that pivots a batch type. After the pivot, each batch type has its own row with null values for the other batch types that were pivoted. I want to group two fields and max() the remaining batch types so that the multiple rows are displayed on one row. I tried using the aggregate transform, but since the batch type field is a string, the max() function fails in the package. Is there another transform or can I use the aggragate transform another way so that the max() will work on a string?
-- Ryan
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Jul 24, 2006
i can't believe my situation is unique, but my searches for answers have proven fruitless, so please bear with me.i have a date field in my database, and have previously used a simple textbox to allow users to insert a date. i want to make this a little step a little nicer, however, and have added a dropdown for the month, a textbox for the date (i'm not "good" enough to dynamically change this around for a dropdown list), and a dropdown list for the next few years.what "insert" statement would allow me to accomplish this? what i currently have doesn't blow up, but neither does it actually insert anything. here's my statment:<asp:SqlDataSource ID="sdsVersion" runat="server" ConnectionString="<%$ ConnectionStrings:DB %>" InsertCommand="INSERT INTO [Version] ([Major], [Minor], [Sub], [Rev], [Date]) VALUES (@Major, @Minor, @Sub, @Rev, @Month + '-' + @Day + '-' + @Year)"> <InsertParameters> <asp:Parameter Name="Major" Type="Int32" /> <asp:Parameter Name="Minor" Type="Int32" /> <asp:Parameter Name="Sub" Type="Int32" /> <asp:Parameter Name="Rev" Type="Int32" /> <asp:ControlParameter ControlID="ddlMonths" Name="Month" PropertyName="SelectedValue" Type="Int32" /> <asp:ControlParameter ControlID="tbDate" Name="Day" PropertyName="Text" Type="Int32" /> <asp:ControlParameter ControlID="ddlYears" Name="Year" PropertyName="SelectedValue" Type="Int32" /> </InsertParameters></asp:SqlDataSource>
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Jun 2, 2004
Hi, I want to INSERT INTO [Table] ([Field]) VALUES('I Have a ' in value')
please teach me how to
xxx
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May 15, 2006
Hi,
Does anyone know how should I create a table in order that I can insert values(numbers) in the primary key field, using insert statements. I also would like to know if there are any differences between SQL 2k and SQL 2k5.
Thanks in advance for any reply.
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Mar 7, 2008
I am currently working on an application that requires, insertion of the results of a SQL Query in to the field of another table, in the form of a comma separated values.
For example, to explain things in detail:
create table dbo.phone_details
(country varchar(20),
state varchar(30),
list_of_toll_free_numbers text)
insert into dbo,phone_details
values
( 'USA', 'CA', 'select Phone from phone_table where substring(phone, 1, 3) in ('800', '866', '877', '888')' )
The final output I desire is:
country state list_of_toll_free_numbers
---------- ------- -----------------------------------------
USA CA 8009877654, 8665764398, 8776543219
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Nov 14, 2007
I have a web form with a text field that needs to take in as much as the user decides to type and insert it into an nvarchar(max) field in the database behind. I've tried using the new .write() method in my update statement, but it cuts off the text after a while. Is there a way to insert/update in SQL 2005 this without resorting to Bulk Insert? It bloats the transaction log and turning the logging off requires a call to sp_dboptions (or a straight-up ALTER DATABASE), which I'd like to avoid if I can.
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Feb 27, 2008
Hi,
I am building a website in ASP.net C# for a university project, and would like to search a table (Member) for a field (UserName) using a session variable Session["sUserName"]. If that field is null, then I would like to insert that session variable into the field to start to create a new user. However, I am getting errors saying that I am using invalid expression terms. My code is;
//Create the Command, passing in the SQL statement and the ConnectionString queryString = "SELECT UserName FROM Member WHERE (UserName = @myUsername); ";
SqlCommand cmd = new SqlCommand(queryString, sqlConn);cmd.Parameters.Add(new SqlParameter("@myUsername", Convert.ToString(Session["sUserName"])));
//If UserName is null, display confirmation, else display errorif (UserName == null) ;
{UserNameCheckLabel.Text = "Username okay";
String queryString = "INSERT INTO Member (UserName) VALUES(@myUsername); ";SqlCommand cmd = new SqlCommand(queryString, sqlConn); cmd.Parameters.Add(new SqlParameter("@myUsername", Convert.ToString(Session["sUserName"])));
}else;
{UserNameCheckLabel.Text = "That username is in use";
}
I have a feeling I should be checking the database for the UserName, but I'm not sure whether to put this in the SELECT statement part or as a method... I would be most grateful for any advice!
Many thanks,
Chima
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Jul 20, 2005
We currently have an SQL db running on a web server.One of these fields is a large(ish) amount of text data – up to 400characters – and has been cast variously as varchar, nchar and texttype to overcome a problem. The problem appears to be in retrievingthe data via ASP. I understand that ASP can handle string data of thissize so I am okay there.When the records are retrieved from the db, the data string length =0.I know the data is there because I have written a Delphi data managerwhich interrogates the db and shows all records and their contents.So if ASP can handle strings this size and the data is there, why do Iget a data length of zero bytes returned when I interrogate the recordset?Whichever way I cast this field I get the same result.I know the code is sound as it works locally through a MS SQL serveron my PS.Anyone have this problem or know what's causing it? I have logged asupport call with my hosting company, but they haven't replied as yetand I am stuck on an urgent project.Any suggestions?CheersGrant
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May 31, 2004
How can I pass into the database (@User_fax = null) if the fax form field is empty, from a command type Stored Procedure? For example:
Dim CmdUpdate As New SqlCommand("Form2_NewUser", strConnection)
CmdUpdate.CommandType = CommandType.StoredProcedure
CmdUpdate.Parameters.Add("@User_fax", SqlDbType.char, 9)
CmdUpdate.Parameters("@User_fax").Value = fax.Text()
...
strConnection.open()
CmdUpdate.ExecuteNonQuery
strConnection.close()
And, the stored procedure inside Sql server:
USE market1
GO
ALTER PROC Form2_NewUser
@User_id bigint, @User_fax char(9),...
AS
SET NOCOUNT ON
UPDATE Users
SET User_fax = @User_fax, ...
WHERE User_id = @User_id
SET NOCOUNT OFF
GO
Thank you,
Cesar
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Jun 21, 2005
I am having problems adding a date field to a SQL Server Database from a form in ASP.Net. When I leave the date field blank, it automatically inserts Monday, January 01, 1900. I want it to be null when the expiration date is left blank. Can someone please help me with this? Here's my code for adding information from the table to the database: '--------------------------------------------- ' name: Button_Click() '--------------------------------------------- Sub Button_Click( s As Object, e As EventArgs ) Dim strConnect As String Dim objConnect As SQLConnection Dim strInsert As String Dim cmdInsert As SqlCommand
'Get connection string from Web.Config strConnect = ConfigurationSettings.AppSettings("ConnectionString")
objConnect = New SqlConnection(strConnect) strInsert = "Insert DomainName (ClientID, DomainName, Registrar, ExpirationDate ) Values ( @ClientID, @DomainName, @Registrar, @ExpirationDate )" cmdInsert = New SqlCommand( strInsert, objConnect) cmdInsert.Parameters.Add( "@ClientID", dropClient.SelectedItem.Value ) cmdInsert.Parameters.Add( "@DomainName", txtDomainName.Text ) cmdInsert.Parameters.Add( "@Registrar", txtRegistrar.Text ) cmdInsert.Parameters.Add( "@ExpirationDate", txtExpirationDate.Text )
objConnect.Open() cmdINsert.ExecuteNonQuery() objConnect.Close() 'Display the results "page" DisplayResults()
End Sub Here's the code for the form: <form id="frmDomainNames" method="post" runat="server" onSubmit="return InputIsValid()"> <div align="center"> <table border="0" cellpadding="2" cellspacing="2" width="50%" bgcolor="#330099"> <tr> <td height="37" colspan="2" align="center" valign="middle" bgcolor="#330099"><font color="white" size="5">Domain Name Information</font></td> <td> </td> </tr> <tr> <td height="42" align="right" valign="top" bgcolor="#e8e8e8"><font face="MS Sans Serif, Arial" size="2" color="#000000"><strong><nobr> Client's Name:</nobr></strong></font></td> <td colspan="2" valign="top" bgcolor="#e8e8e8"> <p> <asp:dropdownlist id="dropClient" runat="server" /> </p> </td> </tr> <tr> <td height="42" align="right" valign="top" bgcolor="#e8e8e8"><font face="MS Sans Serif, Arial" size="2" color="#000000"><strong><nobr> Domain Name:</nobr></strong></font></td> <td colspan="2" valign="top" bgcolor="#e8e8e8"> <p> <ASP:TextBox id="txtDomainName" runat="server" TextMode="SingleLine" Columns="30" /> </p> </td> <tr> <td height="42" align="right" valign="top" bgcolor="#e8e8e8"><font face="MS Sans Serif, Arial" size="2" color="#000000"><strong><nobr> Registrar:</nobr></strong></font></td> <td colspan="2" valign="top" bgcolor="#e8e8e8"> <p> <ASP:TextBox id="txtRegistrar" runat="server" TextMode="SingleLine" Columns="30" /> </p> </td> </tr> <tr> <td height="42" align="right" valign="top" bgcolor="#e8e8e8"><font face="MS Sans Serif, Arial" size="2" color="#000000"><strong><nobr> Expiration Date:</nobr></strong></font></td> <td colspan="2" valign="top" bgcolor="#e8e8e8"> <p> <ASP:TextBox id="txtExpirationDate" runat="server" TextMode="SingleLine" Columns="10" /> </p> </td> </tr>
<TR> <TD> </TD> <TD align="center"> <asp:Button Text="Submit" OnClick="Button_Click" Runat="Server" /> </TD> </TR> </table> </form> </div>
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Mar 13, 2007
hi guys. i'm using vb.net with vs 2003 and MSSQL Managment Studio Express as my database server.
i want to insert null value into database, so i use System.DBNull.Value
but it doesn't show NULL, but a empty field. I tried System.DBNull.Value.ToString, it gives me same result.
what can i do to have NULL in that field?
thanks for any advise, i would appreciate it very much.
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Apr 16, 2015
If I have a table with 1 or more Nullable fields and I want to make sure that when an INSERT or UPDATE occurs and one or more of these fields are left to NULL either explicitly or implicitly is there I can set these to non-null values without interfering with the INSERT or UPDATE in as far as the other fields in the table?
EXAMPLE:
CREATE TABLE dbo.MYTABLE(
ID NUMERIC(18,0) IDENTITY(1,1) NOT NULL,
FirstName VARCHAR(50) NULL,
LastName VARCHAR(50) NULL,
[Code] ....
If an INSERT looks like any of the following what can I do to change the NULL being assigned to DateAdded to a real date, preferable the value of GetDate() at the time of the insert? I've heard of INSTEAD of Triggers but I'm not trying tto over rise the entire INSERT or update just the on (maybe 2) fields that are being left as null or explicitly set to null. The same would apply for any UPDATE where DateModified is not specified or explicitly set to NULL. I would want to change it so that DateModified is not null on any UPDATE.
INSERT INTO dbo.MYTABLE( FirstName, LastName, DateAdded)
VALUES('John','Smith',NULL)
INSERT INTO dbo.MYTABLE( FirstName, LastName)
VALUES('John','Smith')
INSERT INTO dbo.MYTABLE( FirstName, LastName, DateAdded)
SELECT FirstName, LastName, NULL
FROM MYOTHERTABLE
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Apr 2, 2008
I'm importing data form an Excel file to a Sql Server Database. Some of the data imported represents time as a double type so i convert the times into DateTime to be inserted into the database. The time values that aren't available in the Excel file are 0.. so what i want to do is insert null into the database for all the values that are 0 in the excel file... How do i do that based on this code i have so far:protected void ButtonImport_Click(object sender, EventArgs e){PanelUpload.Visible = false;PanelView.Visible = false;PanelImport.Visible = true;LabelImport.Text = "";OleDbCommand objCommand = new OleDbCommand();objCommand = ExcelConnection(); OleDbDataReader reader;reader = objCommand.ExecuteReader(); while (reader.Read()){DateTime? in_1 = null;DateTime? out_1 = null;DateTime? in_2 = null;DateTime? out_2 = null; int emp_id = Convert.ToInt32(reader["emp_id"]);DateTime date_entry = Convert.ToDateTime(reader["date_entry"]);if (Convert.ToDouble(reader["in_1"]) != 0)in_1 = ConvertDoubleToDateTime((double)reader["in_1"]);if (Convert.ToDouble(reader["out_1"]) != 0)out_1 = ConvertDoubleToDateTime((double)reader["out_1"]);if (Convert.ToDouble(reader["in_2"]) != 0)in_2 = ConvertDoubleToDateTime((double)reader["in_2"]);if (Convert.ToDouble(reader["out_2"]) != 0)out_2 = ConvertDoubleToDateTime((double)reader["out_2"]); ImportIntoAttendance(emp_id, date_entry, in_1, out_1, in_2, out_2);} reader.Close();}protected void ImportIntoAttendance(int emp_id, DateTime date_entry, DateTime? in_1, DateTime? out_1, DateTime? in_2, DateTime? out_2){ SqlDataSource AttendanceDataSource = new SqlDataSource();AttendanceDataSource.ConnectionString = ConfigurationManager.ConnectionStrings["SalariesConnectionString1"].ToString();AttendanceDataSource.InsertCommandType = SqlDataSourceCommandType.Text;AttendanceDataSource.InsertCommand = "INSERT INTO Attendance (emp_id, date_entry, in_1, out_1, in_2, out_2) " +"VALUES ('" + emp_id + "', '" + date_entry + "', '" + in_1 + "', '" + out_1 + "', " +"'" + in_2 + "', '" + out_2 + "')"; int rowsAffected = 0;try{rowsAffected = AttendanceDataSource.Insert();}catch(Exception ex){LabelImport.Text += "<font color=red>" + ex + "</font><br />";} }private DateTime ConvertDoubleToDateTime(double dbTime){string[] SplitTime = dbTime.ToString().Split('.');string hours = SplitTime[0];string minutes = String.Empty;string time = String.Empty; if (dbTime.ToString().IndexOf('.') != -1){if (SplitTime[1].Length >= 1){if (SplitTime[1].Length == 1)minutes = Convert.ToString(Convert.ToDouble(SplitTime[1]) * 10);else if (SplitTime[1].Length > 1)minutes = SplitTime[1];}}elseminutes = "00";time = hours + ":" + minutes;return Convert.ToDateTime(time);}
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