Using a form control (textbox) as an SQL Server parameter

Question

Hi
i am trying to use a form textbox control to filter an SQL query but i do not know how to do this. In fairness, im from an Access background originally and can easily do it in Access lol.
Is it better to connect to the SQL database using code and create an SQL string to get / set data? if so? how can i do that?
or
do i use a table adapter which is my current method but i do not know how to integrate a text control as a query parameter.
for reference-
Query = SQL Server View (Same as access Database Query)
Thanks for any help
Nigel
Nacho is the derivative of Nigel "True fact!"

Answer 1

Hi nmjShaw,
I wrote a sample about how to integrate a text control as query parameter in vb.net.
Dim conn As New System.Data.OleDb.OleDbConnection()
conn.ConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Database2.accdb"
Try
Dim sql As String = "SELECT * FROM tbl_user WHERE username = @username"
Dim dt As New DataTable()
Dim sqlCom As New System.Data.OleDb.OleDbCommand(Sql, conn)
'Open Database Connection
sqlCom.Parameters.AddWithValue("@username", TxtControl.Text)'integrate text control as parameter here
sqlCom.Connection = conn
conn.Open()
Dim da As OleDb.OleDbDataAdapter = New OleDb.OleDbDataAdapter(sql, conn)
da.Fill(dt)
' Then you could use the dt.
conn.Close()
Catch ex As Exception
MessageBox.Show("Error:" & ex.Message)
End Try
If you have any other concern regarding this issue, please feel free to let me know.
Best regards,
Youjun Tang
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