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VB.net 2010 creating and using a dataset and SQLdata adapter example

Posted on 2013-10-25
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Last Modified: 2013-10-25
Dear experts,

I need to use a dataset to add or update update a table with about 100 000 recs from a SQL 2008 server.

Can you please assitance to my example and show me how to complete complete this approach to view data and modify data?

Dim conn As New SqlConnection
        conn.ConnectionString = My.Settings.XXXX      
 conn.Open()
        Dim ds As New DataSet("Claims")
        Dim cmd As New SqlCommand("Select * from claim where claim.claimID ='" & txtClaimId.Text & "'", conn)
        Dim da As New SqlDataAdapter
        da.SelectCommand = cmd
        da.Fill(ds)
        txtCompany
       txtCompName
        txtloc......


Thanks
Cj
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Question by:cin_champ
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4 Comments
 
LVL 9

Accepted Solution

by:
dustock earned 500 total points
ID: 39600604
This should get you started

        Dim cnSQL As SqlConnection = Nothing
        Dim cmdSQL As SqlCommand
        Dim daSQL As SqlDataAdapter
        Dim dsData As DataSet = Nothing

        cnSQL = New SqlConnection()
        cnSQL.ConnectionString = YOURCONNECTIONSTRING

        Try
            cnSQL.Open()
        Catch ex As Exception
            cnSQL.Dispose()
            cnSQL = Nothing
        End Try

        cmdSQL = New SqlCommand()
        cmdSQL.Connection = cnSQL
        cmdSQL.CommandText = 'YOUR SELECT STATEMENT
        cmdSQL.CommandType = CommandType.Text

        dsData = New DataSet()
        Try
            daSQL = New SqlDataAdapter(cmdSQL)
            daSQL.Fill(dsData)
            daSQL.Dispose()
        Catch ex As Exception
            dsData.Dispose()
            dsData = Nothing
        Finally
            cmdSQL.Dispose()
            cnSQL.Close()
            cnSQL.Dispose()
        End Try

        Return dsData

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Author Comment

by:cin_champ
ID: 39600645
Dustock ,

thanks for the response but  need to know how to I link my text boxes to the dsData?

txtCompany = ?
txt customername = ?

Thanks
Cj
0
 
LVL 9

Assisted Solution

by:dustock
dustock earned 500 total points
ID: 39601129
Sorry about that, I thought you had that part covered.  Just an FYI, the code above was intended to be a subroutine, and actually the connection could be its own subroutine, but we wont get into that right now.  If you aren't putting the above code in a subroutine remove the 'return dsData" and replace with the code below.

In the example below the (0)(0) is first row, first column and (0)(1) is first row, second column.  The commented out the lines do the exact same thing, but I replaced Tables(0) with Tables("tablename"), and I guessed at the database column names after the row(0).  

Let me know if I can be of anymore help.

        If dsData.Tables(0).Rows.Count > 0 Then
            txtCompany.Text = dsData.Tables(0).Rows(0)(0).ToString();
            txtcustomername.Text = dsData.Tables(0).Rows(0)(1).ToString();
            'txtCompany.Text = dsData.Tables("claim").Rows(0)("Company").ToString();
            'txtcustomername.Text = dsData.Tables("claim").Rows()("Name").ToString();
        Else
            MessageBox.Show("No data returned from query")
        End If

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Author Closing Comment

by:cin_champ
ID: 39601456
Thank You!
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