ASP Returning Null Sized Field From MS SQL Database
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 400
characters – and has been cast variously as varchar, nchar and text
type to overcome a problem. The problem appears to be in retrieving
the data via ASP. I understand that ASP can handle string data of this
size 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 manager
which 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 I
get a data length of zero bytes returned when I interrogate the record
set?
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 server
on my PS.
Anyone have this problem or know what's causing it? I have logged a
support call with my hosting company, but they haven't replied as yet
and I am stuck on an urgent project.
Hi there ; This Problem is goin to make me crazy! I've got a table with couple of fields, 2 of them are DateTime, in Sql Express 05 . I used asp.net 2.0 to insert datetime values, directly, using sth like DateTime.Now.ToString() . i use 2 selects as follows : 1)select * from X where Date1='8/9/2006 11:17:41 AM' 2)select * from X where Date2='8/9/2006 11:17:41 AM' #1 is OK, but the second one returns a row with all columns set to NULL . (X is the name of the table) Thanks in advance
I have a xml file downloaded from webAPI which i want to import into my database.There are several sub childnodes and need to combine data between nodes.
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
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?
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>
The code below returns the members who have accounts that are inactive, and works correctly. It returns the memberid, but returns null values for the barcode values. I am explicitly looking for unmatched rows, i.e. the LEFT OUTER JOIN will return joined member-address rows which do not have a matching account, according to the ON conditions, and these are the ones I want because of that WHERE condition. Therefore account.barcode will always be NULL too.
Is there to perform the same query and return account details? I have tried running a query to return just the memberid values and then perform a second query to match the account details, but this is very ineffecient and slow.
select member.memberid, account.barcode FROM member INNER JOIN address ON address.MemberID = member.Memberid LEFT OUTER JOIN account ON account.Memberid = member.MemberID AND account.enddate >= current_date AND account.closed = 0 WHERE account.Memberid is null AND member.isDeleted = 0
I've got the following query in SQL 2000:select a.SSN, a.MonthName, a.IMClinicDay,b.IMClinicDay as SecondDayfrom tblResidentRotations ainner join view7 bon a.SSN = b.SSNwhere a.AcademicYear = '2004-2005' and a.SSN = '999999999' anddatename(month, a.IMClinicDateFirst) = b.MonthNameThis query returns a resultset like this:<SSN> <Month> <a.IMClinicDay> <SecondDay>999999999 July Friday PM Tuesday PM999999999 September Tuesday PM Friday PM999999999 October None Friday PM999999999 November Friday PM Tuesday PM999999999 January Tuesday PM Friday PM999999999 April Friday PM Monday PM....and so onFor some of the months, there is a null value for "b.IMClinicDay". Forexample, it's null for August, December, and February. I want myresultset to look like this:<SSN> <Month> <a.IMClinicDay> <SecondDay>999999999 July Friday PM Tuesday PM999999999 August Tuesday PM null999999999 September Tuesday PM Friday PM999999999 October None Friday PM999999999 November Friday PM Tuesday PM999999999 December Tuesday PM null999999999 January Tuesday PM Friday PM999999999 February Friday PM null999999999 April Friday PM Monday PM....and so onHow can I return a null for these days? Thanks for any help oradvice.
i have 2 stored procedures: a delete and a select. the delete sp returns the rowcount properly. the select returns null. the code for both sp's is extremely simple and extremely similar. when i execute the select sp in server management studio the rowcount shows a 1 as expected. but the calling method gets null. SP Code ALTER PROCEDURE [dbo].[RetrieveEmployeeKeyFromAssignmentTable] @assignmentPrimaryKey int, @rowCount int OUTPUT AS BEGIN SET NOCOUNT ON; SELECT employeePrimaryKey FROM assignmentTable WHERE primaryKey = @assignmentPrimaryKey; SET @rowCount = @@RowCount; END c# code SqlConnection conn = GetOpenSqlConnection(); if (conn == null) return true; SqlDataReader reader = null; SqlParameter p1 = new SqlParameter(); SqlParameter p2 = new SqlParameter(); try { SqlCommand command = new SqlCommand(); command.CommandText = "RetrieveEmployeeKeyFromAssignmentTable"; command.CommandType = CommandType.StoredProcedure; command.Connection = conn; p1.ParameterName = "@assignmentPrimaryKey"; p1.Value = assignmentPrimaryKey; p2.ParameterName = "@rowCount"; p2.Direction = ParameterDirection.Output; p2.Value = 0; command.Parameters.Add(p1); command.Parameters.Add(p2); reader = command.ExecuteReader(); if (p2.Value == null) //always true any suggestions would be appreciated. thanks. matt
I have a simple table on my webpage which shows data from my database. It all worked fine apart from one part. I wanted the select statement to select only NULL values from a column, as these are classed as open queries. Once I have closed the query a 0 or 1 will automatically be posted and will no longer have a NULL value. I have a simple select statement (which I will post on here when I log in with my work computer) and at the end I have a WHERE Column = NULL. I have also tried WHERE column <> 0.0 AND column <>1.0 and that did not work. If I only did WHERE column <> 1.0, i only get the 0.0 results and none of the NULL results, but if I have no WHERE statement I get all the results including the NULL values.
I have a table tblnetwork on which identity property is defined on column networkid.
When I issue the following command new record is getting inserted into tblnetwork and identity column is getting incremented properly. But, I am not able to get the @@identity value It is returned as NULL.
Using SQL2000. I want to return the # of columns with non-nullvalues. Here's my query so far:selectcase when Dx1 is not null then 0 else 1 end +case when Dx2 is not null then 0 else 1 end +case when Dx3 is not null then 0 else 1 end +case when Dx4 is not null then 0 else 1 end as DxCountfrom tblClerkshipDataCleanwhere PalmName = @PalmNameThere are 7 rows for the particular PalmName I'm using. The queryreturns a result of 7. However, there are 25 values in Dx1 thru Dx4so the query should be returning 25.What am I doing wrong here? Thanks in advance.
I have a SQL 2005 clustered server which is returning a Null value for @@servername. I find the server entry in sysservers. I have replication configured on this so i am not able to do a Sp_dropserver & sp_addserver as this acts as a publisher. The configured merge repication stopped working because of this issue and I am not able to delete replication as the the delete option uses @@servername which returns a null value. So I am struck in a loop.
I need to pass in null/blank value in the date field or declare the field as string and convert date back to string.
I tried the 2nd option but I am having trouble converting the two digits of the recordset (rs_get_msp_info(2), 1, 2))) into a four digit yr. But it will only the yr in two digits. The mfg_start_date is delcared as a string variable
option 1 I will have to declare the mfg_start_date as date but I need to send in a blank value for this variable in the stored procedure. It won't accept a null or blank value.
I am trying to insert a record to based on the source below, however the GUID of GiftOcc_ID is being returned as zero's so the first record can be added but as it is defined as the primary Key and uniqueidentifier the next record fails with a duplicate entry. Basically how do I ensure that the GUID is created and not nulls. As you can see I am trying to use Newid() which I have inserted as a default value but that does not work. Also as it is a unique identifier the "is identity" is not available
Protected Sub CreateGiftOccasion(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button2.Click Try Dim null As New Nullable(Of Integer) Dim da As New DataSet2TableAdapters.Gift_OccasionTableAdapter Dim GiftOcc_ID As Guid da.Insert(newid(), Occ_Type_Text.Text, Occ_Desc_Text.Text, Calendar1.SelectedDate, Calendar2.SelectedDate, 1) Catch ex As Exception
I'm still having issues with this despite my attempts to resolve. I even have "with exec as dbo" in my sproc, and and "exec as dbo" in my execution, but still the encrypted data returns nulls when I exec as a user other than DBO. Below is precisely what I have done. All ideas are welcomed.
TIA, ChrisR
--If there is no master key, create one now
IF NOT EXISTS (SELECT * FROM sys.symmetric_keys WHERE symmetric_key_id = 101) CREATE MASTER KEY ENCRYPTION BY PASSWORD = '23987hxJKL95QYV4369#ghf0%94467GRdkjuw54ie5y01478d Dkjdahflkujaslekjg5k3fd117 r$$#1946kcj$n44ncjhdlj' GO
CREATE CERTIFICATE HumanResources037 WITH SUBJECT = 'Employee Social Security Numbers'; GO
CREATE SYMMETRIC KEY SSN_Key_01 WITH ALGORITHM = DES ENCRYPTION BY CERTIFICATE HumanResources037; GO
USE [AdventureWorks]; GO
-- Create a column in which to store the encrypted data ALTER TABLE HumanResources.Employee ADD EncryptedNationalIDNumber varbinary(128); GO
-- Open the symmetric key with which to encrypt the data OPEN SYMMETRIC KEY SSN_Key_01 DECRYPTION BY CERTIFICATE HumanResources037;
-- Encrypt the value in column NationalIDNumber with symmetric -- key SSN_Key_01. Save the result in column EncryptedNationalIDNumber. UPDATE HumanResources.Employee SET EncryptedNationalIDNumber = EncryptByKey(Key_GUID('SSN_Key_01'), NationalIDNumber); GO
-- Verify the encryption. -- First, open the symmetric key with which to decrypt the data OPEN SYMMETRIC KEY SSN_Key_01 DECRYPTION BY CERTIFICATE HumanResources037; GO
-- Now list the original ID, the encrypted ID, and the -- decrypted ciphertext. If the decryption worked, the original -- and the decrypted ID will match.
alter procedure getDecryptedIDNumber with exec as owner as SELECT NationalIDNumber, EncryptedNationalIDNumber AS "Encrypted ID Number", CONVERT(nvarchar, DecryptByKey(EncryptedNationalIDNumber)) AS "Decrypted ID Number" FROM HumanResources.Employee; GO
/*works for me, shows the decrypted data*/
exec getDecryptedIDNumber
USE [master] GO
CREATE LOGIN [test] WITH PASSWORD=N'test', DEFAULT_DATABASE=[AdventureWorks], CHECK_EXPIRATION=OFF, CHECK_POLICY=OFF GO
USE [AdventureWorks] GO
CREATE USER [test] FOR LOGIN [test] GO
use [AdventureWorks] GO
GRANT EXECUTE ON [dbo].[getDecryptedIDNumber] TO [test] GO
GRANT IMPERSONATE ON USER:: dbo TO test; GO
/*Now, open up a "file/new/DB Engine Query" and login with the test login*/ exec as user = 'dbo' exec getDecryptedIDNumber
/*This returns NULL values where it should show the decrypted data*/
Hello again! I'm having yet another problem with my code.
CASE Kit WHEN 'Y' THEN '(Kit)' WHEN 'N' THEN '' END + ' ' + CASE cream WHEN 'Y' THEN '(cream)' WHEN ' N' THEN '' END + ' ' + CASE Phone WHEN 'Y' THEN '(Phone)' WHEN 'N' THEN '' END
The problem that I am running into is that if one of the values comes up as NULL the whole field is NULL. am i doing something wrong?
I've a package that has a excel source. But i'm having a strange problem with it. One of the columns in the source file have a lot of null values but not all of them. But when i run the package a put a data viewer right after the source and i can see that it's showing that the few fields that should have values are also null. I've tried a lot of things but they didn't work. I need some help and fast if possible. Example: Source file.xls Name Grade OtherGrade John 30 30.23 In the DataViewer Name Grade OtherGrade John 30 NULL
First off, I'm not very familiar with SQL Server. I need some guidance on what the best path to take is for this as it may not even be table partitions.
I have a huge table (155 million rows) and it's gotten so large than I can't even delete a large set of rows from it (i.e. delete everything older than 6 mo, which would be ~100 million rows). When trying to run a delete like this, it just goes for a LONG time and then just eventually runs out of memory.
The current data in this table can actually be completely cleared out soon (after Feb 1st) and I plan to do this with TRUNCATE TABLE, or just DROP and recreate. Once I do this, I want to create a way to keep this table moderately sized so it never grows that large again and it seems table partitions may be the way to go for this?
I'd like to keep the last 6mo of data in it (I have a datetime column to keep track of this). Anything older I'd like automatically removed. Can I do this with table partitioning? Create 6 partitions that store the 6 most recent months of data and everything older automatically gets dropped off?
If not partitions, what do you suggest to keep this DB modest size?
I have a form with two date fields that the user will submit their requested vacation time off with. When they insert it, I am trying to say find the difference between the request_start_date and request_end_date in days MINUS any of the days they would already have off like weekends or holidays that are included in another table. Everything inserts okay, but I am getting null for the request_duration. If I put dates in quotes and run the query it comes back with the right results. If I put the dates in the form and submit it, I get Null for the request_duration. Thank you in advnace for any help on this! INSERTrequest ( emp_id, request_submit_date, request_start_date, request_end_date, request_duration, request_notes, time_off_id ) Select@emp_id, GETDATE(), @request_start_date, @request_end_date, 1 + DATEDIFF(day, @request_start_date, @request_end_date) - (select count(*) from WeekEndsAndHolidays where DayOfWeekDate between @request_start_date and @request_end_date), @request_notes, @time_off_id
i have a stored procedure that has parameters. this dataset is used in a crystal report. the parameters are in the sp and will return records if a value is selected. i would like to return records if one parameter or all parameters are selected. there are 3 parameters, date range, receipt, po # if i select a distinct value and leave the others null, or 2 values 1 null etc, i would like to return the records, i am having trouble with the syntax. thank you
I'm running into an issue where if a report retrieves 0 records, I run into an error. My report has 2 queries-- the main query to retrieve Account information and the other to return Contact information based on the contact id(s) returned by the Account query. The reason needing two separate queries is that the contact and account tables are on different databases.
Now here is my account query: select contact_id, username, password from account. My contact query looks like this: select name, address, .... from contact where contact_id = @contact_id.
In my report parameters, I define contact_id like this: ******************************************* name = contact_id data type = integer prompt = [blanked out] hidden = checked internal = checked multi-value = unchecked allow null value = checked allow blank value = unchecked
available values: from query: dataset = account value field = contact_id
label field = contact_id
default values: from query: dataset = account value field = contact_id **********************************************
Now, when I run my report and knowing there are no records, I get the following error: "The 'contact_id' parameter is missing a value". Any ideas on how to solve this issue? Thanks.
I have a stored proc which should be returning a datatable. When I execute it manually it returns all requested results. However, when I call it via code (C#) it is returning a null table which leads me to believe the problem is in my code. I'm not getting any errors during runtime. Any help at all would be a BIG help! private void PopulateControls() { DataTable table = CartAccess.getCart(); } public static DataTable getCart() { DbCommand comm = GenericDataAccess.CreateCommand(); comm.CommandText = "sp_cartGetCart"; DbParameter param = comm.CreateParameter(); param.ParameterName = "@CartID"; param.Value = cartID; param.DbType = DbType.String; param.Size = 36; comm.Parameters.Add(param); DataTable table = (GenericDataAccess.ExecuteSelectCommand(comm)); return table; } public static DataTable ExecuteSelectCommand(DbCommand command) { // The DataTable to be returned DataTable table; // Execute the command making sure the connection gets closed in the end try { // Open the data connection command.Connection.Open(); // Execute the command and save the results in a DataTable DbDataReader reader = command.ExecuteReader(); table = new DataTable(); table.Load(reader); // Close the reader reader.Close(); } catch (Exception ex) { Utilities.SendErrorLogEmail(ex); throw ex; } finally { // Close the connection command.Connection.Close(); } return table; }
I'd like to return the following result set: CompanyModules.CompanyID | Modules.Name | Present 1 | A | True 1 | B | True 1 | C | True 2 | A | True 2 | B | False 2 | C | False
What would be the query for this? Thanks.
Edit: This is the query I have tried:
select CompanyModules.CompanyID, Modules.Name, count(Modules.ID) as Present from
CompanyModules RIGHT outer Join Modules on CompanyModules.ModuleID = Modules.ID
group By CompanyModules.CompanyID, Modules.Name
Order by CompanyID
However, it only returns a partial result set:
CompanyModules.CompanyID | Modules.Name | Present 1 | A | 1 1 | B | 1 1 | C | 1 2 | A | 1
Hi all i'm trying to get the identity field after inserting into db, what am i doing wrong? thanks a lot my sproc: CREATE PROCEDURE ng_AddCotacao(...@Codigo_cotacao int OUTPUT)ASBEGINSET NOCOUNT ONINSERT INTONegocios_cotacoes(...)VALUES(...)SELECT @Codigo_cotacao=SCOPE_IDENTITY()SET NOCOUNT OFFENDGO
class file public class Cotacoes { public int codigoCotacao; } public class CotacaoAtualiza { public Cotacoes cotacoes = new Cotacoes(); public CotacaoAtualiza() { } public void AdicionarCotacao( ... ) { SqlConnection myConnection = new SqlConnection(ConfigurationSettings.AppSettings["stringConexao"]); SqlCommand myCommand = new SqlCommand("ng_AddCotacao", myConnection); myCommand.CommandType = CommandType.StoredProcedure; ... SqlParameter paramCodigo_cotacao = new SqlParameter("@Codigo_cotacao", SqlDbType.Int, 4); paramCodigo_cotacao.Direction = ParameterDirection.Output; myCommand.Parameters.Add(paramCodigo_cotacao); ... myConnection.Open(); SqlDataReader result = myCommand.ExecuteReader(); while(result.Read()) { this.cotacoes.codigoCotacao = (int) result["@Codigo_cotacao"]; } myConnection.Close(); }
calling into code-behind file: CotacaoAtualiza ca = new CotacaoAtualiza(); Cotacoes cotacoes = ca.cotacoes; Response.Redirect("Cotacao_confirma.aspx?cotacao=" + cotacoes.codigoCotacao);
I want to get a count of how many PosAnswer are associated with the QuesToAsk 'List your top 5 favorite places'
This is the syntax I am using to achieve this, and it works, but wasn't sure if there was a better way (changing the data structure is unfortunately not an option in this situation). Here is my table structure
Code: Create Table Test ( QuesToAsk varchar(1000), PosAnswer varchar(1000)
[Code] ....
And this is the syntax I use to get the count I am after
Code: DECLARE @VariableName varchar(25) DECLARE @FormattedVariableName varchar(25) DECLARE @FieldCount int SET @VariableName =
I'm running the following test query on a single table:
SELECT sph.datestamp, sph.stocksymbol, sph.closing, DATENAME(dw, sph.datestamp), CASE DATENAME(dw, sph.datestamp)Â Â Â WHEN 'Monday' then 'Monday'Â Â ELSE (SELECT CAST(sph2.datestamp AS nvarchar) FROM BI_Test.dbo.StockDB AS sph2 WHERE sph2.DateStamp = DATEADD(d, -1, sph.datestamp) AND sph2.StockSymbol = 'NYA')Â END AS TestCase,
[Code] ....
And here's an example of the output I'm getting:
Why the exact same subquery in the THEN of the second CASE statement is returning NULL when the first one completes as expected?
