Can you use a DataTable to update an SQL Table and can it be done in a batch UPDATE as opposed to incrementing through every row using a stored procedure similar to UPDATE SQLTable SET Position = @Position WHERE ID = @ID?
View 3 RepliesI'm importing XML file into DataTable and need to Insert Data into SQL Table.
I'm not sure if its posible to take a DataTable with Data and insert into DataAdapter. From there i wanted to update SQL using TableAdapter?
Any Tips?
Thanks,
hi,
I have my database stored in the sqlserver 2005. Using the table name i am retrieving the table and it is displayed to the user in the form of datagridview.I am allowing the user to modify the contents of the table, including the headers. Is it possible for me to update the table straightway rather than giving a sql update command for each and every row of the table .
Pls reply asap....
-Sweety
Imagine the following scenario: two tables (say, "requests" and "details") are joined in a 1:n relationship on MSSQL 2008. Both tables contain an ID (autoincrement field) and a timestamp field for proper concurrency management. Data access in the frontend is provided by a typed dataset in VS 2010. There are SPs on the server which select, update, insert or delete data in each of the two tables (so, 8 SPs alltogether: uspRequestsSelect, uspDetailsInsert etc.). These SPs are used for data access in the dataset. The GUI is a Windows form with 2 datagridviews, one for request datatable and one for the child-relation-based datatable FK_request_details. So, each request shows its details. The form works well so far.
Now, trouble strikes. A business rule says: "the first details row of a request (=row with lowest ID) always has a 0 in column "additional fee". For additional detail rows, this field has to be set to constant value 45". In short: the first detail row of each request is free, second and later details are charged 45 €.
So, I created a SP "uspRequestFeeManager", which recalculates all (!) detail rows of a request. This SP is called in uspDetailsInsert, uspDetailsUpdate and uspDetailsDelete, as each of this cases causes the additional fee to be recalculated for all rows (as rowcount can change). In Management Studio, this works as well!
But: as the uspRequestFeeManager changes data even for rows the user did NOT touch, there's a concurrency exception in my frontend in the following case:
In a request with 2 detail rows (first row has fee = 0, second = 45), the user deletes the row with fee = 0. Committing via TableAdapterManager calls uspDetailsDelete, which calls uspRequestFeeManager, which sets the remaining single details row to a fee value of 0 (which is correct!). This causes TableAdapterManager.UpdateAll to fail ("concurrency exception; delete command has handled 0 of 1 expected records"), as uspRequestFeeManager has "edited" a row which the user didn't touch, and thus updated its timestamp as well. So, the list is out of sync.
The uspRequestFeeManager looked like a good idea... but it seems not to be.
Approach would be: instead of calling the uspRequestFeeManager from within the SP, call it programmatically after TableAfterManager.UpdateAll, and after that, 're-fill' the details datatable with the updated data. But that would transfer business logic from server to client. I don't like that...
Filling a DataTable from SqlQuery : If SqlQuery returns some null values problem ocurrs with DataTable.
Is it possible using DataTable with some null values in it?
Thanks
Hello,I am trying to create a new table in SQL Server based on an excel sheet someone uploads to my site (ie No DTS, and I don't know the field names). How can I easily do that? Can I make a sql table based on a DataTable without going row-by-row? Cause then I could go excel to datatable to sql table.Thanks a bunch,
View 3 Replies View RelatedHello,
I created this DataTable, add rows of data to it, and then display the data on to a form via a repeater.
Dim ds As DataSet = New DataSetDim dtTableName As DataTable = New DataTable("dtTableName") dtTableName.Columns.Add("Description")dtTableName.Columns.Add("ItemNumber")dtTableName.Columns.Add("Quantity")dtTableName.Columns.Add("Price")ds.Tables.Add(dtTableName)
What I need to do now is create a table in SQL Server and update the database with the data I've collect in my dataset. How do I bind and update this data to a sql server table?
Thanks!James
I passed .net datatable from a .net app to a store procedure. From this store procedure, how to code to bulk insert (or another way) to SQL table?
View 7 Replies View RelatedHi
I am Importing data in datatable using SSIS package . I made trigger on that table on insert. The trigger on insert is not firing on that table
Please help
Thanks
CP
Hi,I have table with three columns as belowtable name:expNo(int) name(char) refno(int)I have data as belowNo name refno1 a2 b3 cI need to update the refno with no values I write a query as belowupdate exp set refno=(select no from exp)when i run the query i got error asSubquery returned more than 1 value. This is not permitted when thesubquery follows =, !=, <, <= , >, >= or when the subquery is used asan expression.I need to update one colum with other column value.What is the correct query for this ?Thanks,Mani
View 3 Replies View RelatedHi,
I am having problem in bulk update of a sql server table haning identity column from a datatable( has no identity column) using sqlbulkcopy. I tried several approaches, but it does not show any error nor is the table getting updated. But the identity value seems to getting increased every time.
thanks.
varun
Hi SQL fans,I realized that I often encounter the same situation in a relationdatabase context, where I really don't know what to do. Here is anexample, where I have 2 tables as follow:__________________________________________ | PortfolioTitle|| Portfolio |+----------------------------------------++-----------------------------+ | tfolio_id (int)|| folio_id (int) |<<-PK----FK--| tfolio_idfolio (int)|| folio_name (varchar) | | tfolio_idtitle (int)|--FK----PK->>[ Titles]+-----------------------------+ | tfolio_weight(decimal(6,5)) |+-----------------------------------------+Note that I also have a "Titles" tables (hence the tfolio_idtitlelink).My problem is : When I update a portfolio, I must update all theassociated titles in it. That means that titles can be either removedfrom the portfolio (a folio does not support the title anymore), addedto it (a new title is supported by the folio) or simply updated (atitle stays in the portfolio, but has its weight changed)For example, if the portfolio #2 would contain :[ PortfolioTitle ]id | idFolio | idTitre | poids1 2 1 102 2 2 203 2 3 30and I must update the PortfolioTitle based on these values :idFolio | idTitre | poids2 2 202 3 352 4 40then I should1 ) remove the title #1 from the folio by deleting its entry in thePortfolioTitle table2 ) update the title #2 (weight from 30 to 35)3 ) add the title #4 to the folioFor now, the only way I've found to do this is delete all the entriesof the related folio (e.g.: DELETE TitrePortefeuille WHERE idFolio =2), and then insert new values for each entry based on the new givenvalues.Is there a way to better manage this by detecting which value has to beinserted/updated/deleted?And this applies to many situation :(If you need other examples, I can give you.thanks a lot!ibiza
View 8 Replies View Relatedhi,friends
we show record from multiple table using single 'selectcommand'.
like....
---------
select *
from cust_detail,vend_detail
---------
i want to insert value in multiple database table(more than one) using single 'insert command'.
is it possible?
give any idea or solution.
i want to update value in multiple database table(more than one) using single 'update command'
i want to delete value in multiple database table(more than one) using singl 'delete command'
it is possible?
give any idea or solution.
it's urgent.
thanks in advance.
I have a table where table row gets updated multiple times(each column will be filled) based on telephone call in data.
Initially, I have implemented after insert trigger on ROW level thinking that the whole row is inserted into table will all column values at a time. But the issue is all columns are values are not filled at once, but observed that while telephone call in data, there are multiple updates to the row (i.e multiple updates in the sense - column data in row is updated step by step),
I thought to implement after update trigger , but when it comes to the performance will be decreased for each and every hit while row update.
I need to implement after update trigger that should be fired on column level instead of Row level to improve the performance?
Hello
I've to write an trigger for the following action
When a entry is done in the table Adoscat79 having in the index field Statut_tiers the valeur 1 and a date in data_cloture for a customer xyz
all the entries in the same table where the no_tiers is the same as the one entered (many entriers) should have those both field updated
statut_tiers to 1
and date_cloture to the same date as entered
the same action has to be done when an update is done and the valeur is set to 1 for the statut_tiers and a date entered in the field date_clture
thank you for your help
I've never done a trigger before
Hi I am trying to use the results of a datatable as an input to a ne SQL statement.
The datatable is created and populted by the source below after previously creating MyLookupCommand
MyLookupReader = MyLookupCommand.ExecuteReader(CommandBehavior.CloseConnection)
Dim Mydatatable = New DataTable()
Mydatatable.Load(MyLookupReader)
I now create a new SQL string allong the lines of
SELECT tableA.field1 FROM TableA INNERJOIN Mydatatable ON tableA.field2 = Mydatatable.Filed9
However I get the following error
Invalid object name 'Mydatatable'.
Any suggestions on how to resolve this.
possibley of interest is that I would have like to have done this in 1 SQL but the results in Mydatatable are from a SELECT DISTINCT and Field1 is a text filed that can't be used in a DISTINCT statement, hence using two statements.
Many thanks in advance
Hi,
I'm wondering if this is possible. I want to use a datatable as a parameter in my SQL query. The error I am getting is "No mapping exists from object type System.Data.DataColumn to a known managed provider native type." Any help is appreciated.
Here is the code.
Private Function GetAvailableTutors(ByVal qualifiedTutorsDataSet As DataTable) As DataTable
Dim TutorAvailabilityDataTable As DataTable = New DataTable()
Using myConnection As New SqlConnection(ConfigurationManager.ConnectionStrings("ASC_Schedule").ConnectionString)
Dim myCommand As SqlCommand = _
New SqlCommand("SELECT TutorID, TimeIndex FROM T_Hours WHERE SessionID > 0 AND TutorID IN (@TutorList) AND DateDropped > GetDATE() ORDER By T_QualifiedTutors.TutorID", myConnection)
myCommand.Parameters.AddWithValue("@TutorList", qualifiedTutorsDataSet.Columns.Item("TutorID"))
Dim myDataAdapter3 As SqlDataAdapter = New SqlDataAdapter()
myDataAdapter3.SelectCommand = myCommand
myDataAdapter3.Fill(TutorAvailabilityDataTable)
Return TutorAvailabilityDataTable
End Using
End Function
hi all
the usual way to bid a gridview is to data soursce
is there a way to do the folowing , creat a data table from the gridview shown valus " currunt page "
thanks
Hi,
I am experimenting to make a datatable in C# code in a page. This table should be a disconected table with Only valid for the present session.
I try the following code:
public partial class Default2 : System.Web.UI.Page
{
DataTable DT = new DataTable("TEST");
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
DataColumn Col1 = new DataColumn("Col1");
Col1.DataType = typeof(Int32);
Col1.AllowDBNull = false;
DT.Columns.Add(Col1);
DataColumn Col2 = new DataColumn("Col2");
Col2.DataType = typeof(string);
Col2.AllowDBNull = true;
DT.Columns.Add(Col2);
DataColumn Col3 = new DataColumn("Col3");
Col3.DataType = typeof(DateTime);
Col3.AllowDBNull = true;
DT.Columns.Add(Col3);
GridView1.DataSource = DT;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
for (int i = 1; i < 20; i++)
{
DataRow MyRow = DT.NewRow();
MyRow["Col1"] = i;
DT.Rows.Add(MyRow);
}
}
}
For one reason or the other. if I click the button I get the message that Col1 dus not make part of the table TEST. It turns out that there are no columns added to the table. altroug the code in the page load part has been run. I suppose I have to do something with the session state to make my DataTable persistent, but I have no idea what. Can somebody help me out?
Thanks!
Rob
Is the merge method, what will work in this case ? I have two datatables with the exact same structure. How can I append the rows from table 2 onto the bottom of table 1 ? Is looping through the rows collection the only way ?
View 2 Replies View RelatedHi,Is it possible to store data that is retrieved by SqlDataSource in a... let's say... DataTable? I mean, If I dragged and dropped a GridView and an SqlDataSource and then I set up those controls in page designer in Visual Studio, is it possible at some time later to retrieve the data retrieved by the SqlDataSource and then store the data in a DataTable?Best regards,Haris
View 7 Replies View RelatedIs there a built in way of converting a LINQ qurey result into a DataTable or DataView ?
View 4 Replies View Relatedhai This is rameshi had a small doubt in this public DataTable GetStatelist() { DataTable returnValue = null; SqlCommand selcommand = new SqlCommand(); selcommand.CommandType = CommandType.Text; selcommand.CommandText = "select * from USER_MASTER"; selcommand.Connection = _connectionobject; try { _connectionobject.Open(); DataSet ds = new DataSet(); SqlDataAdapter ada = new SqlDataAdapter(selcommand); ada.Fill(ds); _connectionobject.Close(); return returnValue; ; } catch (Exception exception) { if (_connectionobject.State == ConnectionState.Open) { _connectionobject.Close(); } throw new Exception(exception.Message); } if (_connectionobject.State == ConnectionState.Open) { _connectionobject.Close(); } return returnValue; ; } after compiling its show the return value is nullwhat is error in my codinghow i can return the value to the corresponding function if (!IsPostBack) { GridView1.DataSource=database.GetStatelist(); GridView1.DataBind(); } i am waiting for the result
View 4 Replies View RelatedI am fetching records from a table and putting in a datatable using the "sqlda.fill(datatable)"
when i see the datable in "data visualizer" i find no rows.
It is confused eventhough it does not throw any error
Do I have to save the datatable into sqldatasource's SELECT results? if yes , how?
View 4 Replies View RelatedI have a table containing prices. This table will be queried very often to provide quotes for clients.So to ease the burden on the server I want to cache the table and then just query the cached version.However it seems that I can only cache the table as a datatable. This means I have to query the datatable to get the prices for each quote.I'm not sure how to query a datatable. Is ther syntax similar to querying a SQL table?In fact is this best way to go about things?Any help would be appreciated.G
View 4 Replies View Related
Hi...
In my appllication, i am having a DataTable... For that DataTable i have to write a query for a expression... This epression is more of mathematical expression type. Here is the sample expression-
(column1 < 1 && (column2 = 2 || column3 > 5) || column4 != 3)
How i can write a query for such a equation...? Is it possible to use logical & mathematical operator in the equation & to write a query for this type of equation... Is there is any good article on this...
Thanks in adavnce...
IamHuM
I have the following: Dim ResourceAdapter As New ResourcesTableAdapters.ResourcesTableAdapter Dim dF As Data.DataTable = ResourceAdapter.GetDataByDistinct Dim numRows = dF.Rows.Count Dim dS As Data.DataTable = ResourceAdapter.CountQuery Dim sumRows = dS.Rows.Count DataList1.DataSource = dF DataList1.DataBind() LblCount.Text = numRows LblSum.Text = sumRows numRows is the number of records in a particular category. CountQuery is a method that returns the total number of records in all the categories. I don't know how to get the result of that query, the code line in bold isn't right. How do I get this number?Diane
View 5 Replies View RelatedI'm trying this code but nothing is being displayedSqlConnection conn = new SqlConnection(ConfigurationManager.AppSettings["STRING_CON"]);
SqlDataAdapter da = new SqlDataAdapter("my_sproc", conn);DataTable dt = new DataTable();
DataRow dr;
//Adding the columns to the datatabledt.Columns.Add("CategoryIdIn");
dt.Columns.Add("CategoryNameVc");foreach (DataGridItem item in gd_freq.Items)
{
dr = dt.NewRow();
dr[0] = item.Cells[0].Text;
dr[1] = item.Cells[1].Text;
dt.Rows.Add(dr);
}//ForEach
da.Fill(dt);
gd_freq.DataSource = dt;
gd_freq.DataBind();
I'm trying to use the SQL Bulk copy class to bulk import from a text file.I'm getting the following error: Line 24: bulkCopy.WriteToServer(CreateDataTableFromFile()); System.Data.SqlClient.SqlException: An error has occurred while establishing a
connection to the server. When connecting to SQL Server 2005, this failure may
be caused by the fact that under the default settings SQL Server does not allow
remote connections. (provider: Named Pipes Provider, error: 40 - Could not open
a connection to SQL Server) I've even tried to allow remote connections thro pipes and restarted the database engine but to no avail. Any inputs/suggestions?
I am quite new to ASP.net 2.0. I have had plenty of experience using ADO.net in standard windows applications.
In my app I am opening a connection to an SQL database and I am creating a DataTable without a DataSet:
Shared m_cnADONetConnection As New System.Data.SqlClient.SqlConnection
Shared m_daDataAdapter As System.Data.SqlClient.SqlDataAdapter
Shared m_rowPosition As Integer
Shared m_dtContacts As New System.Data.DataTable
I am initializing everything and filling my DataTable when the Page first Loads if it isnt a postback.Protected Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Form1.Load
If Not Page.IsPostBack Then
m_rowPosition = 0
m_cnADONetConnection.ConnectionString = "Data Source=.SQLEXPRESS;AttachDbFilename=C:First ASP DatabaseApp_DataMyFirstDatabase.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True"
m_cnADONetConnection.Open()m_daDataAdapter = New System.Data.SqlClient.SqlDataAdapter("Select * From Books", m_cnADONetConnection)m_cbRefillCommand = New System.Data.SqlClient.SqlCommand
m_daDataAdapter.Fill(m_dtContacts)
Me.ShowCurrentRecord()
End IfEnd Sub
The Me.ShowCurrentRecord Sub assigns the values of the current record(row) in the DataTable via (m_rowPosition) to TextBox controls on the form:
I also have record navigation buttons on my form: << < > >> Moving me from record to record (row to row) by incrementing or decrementing m_rowPosition
All is good! I am able navigate the DataTable and the textboxes change their text properties accordingly from record to record.
The only other control on my form is a button which I'm coding its click event to save changes that I made to the current row (record) by changing the values in the textboxes then clicking save.
Here is my code:Protected Sub ButtonSave_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles ButtonSave.Click
If m_dtContacts.Rows.Count <> 0 Then
m_dtContacts.Rows(m_rowPosition).BeginEdit()m_dtContacts.Rows(m_rowPosition)("Title") = TBTitle.Text
m_dtContacts.Rows(m_rowPosition)("Author") = TBAuthor.Textm_dtContacts.Rows(m_rowPosition)("YearPublished") = TBYearPublished.Text
m_dtContacts.Rows(m_rowPosition)("Price") = TBPrice.Textm_dtContacts.Rows(m_rowPosition)("LastReadOn") = TBLastReadOn.Textm_dtContacts.Rows(m_rowPosition)("PageCount") = TBPageCount.Text
m_dtContacts.Rows(m_rowPosition).AcceptChanges()
m_dtContacts.Rows(m_rowPosition).EndEdit()
m_dtContacts.AcceptChanges()
m_daDataAdapter.Update(m_dtContacts)
End Sub
After I click save I can navigate through my records and back to the one I just changed and updated and all is well. The changes were made in the table.
However, when I close the page and exit out of Visual Web Developer and reopen the database: THE CHANGES WERENT UPDATED!!!
This worked all the time in VB2005.net when developing a standard windows app.
Can I use the same approach I was using in my code above or am I missing something.
I have read and searched all over and what I'm thinking is that my UpdateCommand, InsertCommand, DeleteCommand, SelectCommand are empty.
Do I have to do it this way?
Hi, I have the code below. I need to skip the first row in the datatable as it has the headers. This works now, but my gridview gets the header row inserted as a record.Private Shared Sub InsertData(ByVal sourceTable As System.Data.DataTable, ByVal destConnection As SqlConnection) ' old method: Lots of INSERT statements ' first, create the insert command that we will call over and over: destConnection.Open() Using ins As New SqlCommand("INSERT INTO [tblAppointmentDisposition] ([contactdate], [dnbnumber], [prospectname], [businessofficer], [phonemeeting], [followupcalldate2], [phonemeetingappt], [followupcalldate3], [appointmentdate], [appointmentlocation], [appointmentkept], [applicationgenerated], [applicationgenerated2], [applicationgenerated3], [comments], [newaccount], [futureopportunity]) VALUES (@contactdate, @dnbnumber, @prospectname, @businessofficer, @phonemeeting, @followupcalldate2, @phonemeetingappt, @followupcalldate3, @appointmentdate, @appointmentlocation, @appointmentkept, @applicationgenerated, @applicationgenerated2, @applicationgenerated3, @comments, @newaccount, @futureopportunity)", destConnection) ins.CommandType = CommandType.Text ins.Parameters.Add("@contactdate", SqlDbType.Text) ins.Parameters.Add("@dnbnumber", SqlDbType.Text) ins.Parameters.Add("@prospectname", SqlDbType.Text) ins.Parameters.Add("@businessofficer", SqlDbType.NVarChar) ins.Parameters.Add("@phonemeeting", SqlDbType.Text) ins.Parameters.Add("@followupcalldate2", SqlDbType.Text) ins.Parameters.Add("@phonemeetingappt", SqlDbType.Text) ins.Parameters.Add("@followupcalldate3", SqlDbType.Text) ins.Parameters.Add("@appointmentdate", SqlDbType.Text) ins.Parameters.Add("@appointmentlocation", SqlDbType.Text) ins.Parameters.Add("@appointmentkept", SqlDbType.Text) ins.Parameters.Add("@applicationgenerated", SqlDbType.Text) ins.Parameters.Add("@applicationgenerated2", SqlDbType.Text) ins.Parameters.Add("@applicationgenerated3", SqlDbType.Text) ins.Parameters.Add("@comments", SqlDbType.Text) ins.Parameters.Add("@newaccount", SqlDbType.Text) ins.Parameters.Add("@futureopportunity", SqlDbType.Text) ' and now, do the work: For Each r As DataRow In sourceTable.Rows For i As Integer = 0 To 16 ins.Parameters(i).Value = r(i) Next ins.ExecuteNonQuery() 'If System.Threading.Interlocked.Increment(rowscopied) Mod 10000 = 0 Then 'Console.WriteLine("-- copied {0} rows.", rowscopied) 'End If Next End Using destConnection.Close() End Sub
View 3 Replies View RelatedI'm reading XML data into a DataTable that is populated into a datagrid. From here I need to update database and wanted to know how to Fill a DATA ADAPTER with a DATA TABLE?
I'm familiar with updating using a SQL command, but in this case, i have the dataTable already created from XML.
Please help.
Thanks,