Hi,
i have a gridview wich updates all rows in the grid, but the sql server database column is of a numeric type. the empty gridview cells get updated with the value "0" in the database instead of NULL. how can acomplish this. beneath is the update code: ( valueA is of type numeric in database)
Protected Sub Update(ByVal sender As Object, ByVal e As EventArgs) Handles btnUpdate.Click
For Each row As GridViewRow In GridViewexample.Rows
If row.RowType = DataControlRowType.DataRow Then
Dim cmd As New SqlCommand("UPDATE table set valueA = @valueA,valueB = @valueB WHERE ID='" + TxtboxID.Text + "' andvalueC=@valueC and valueD=@valueD andvalueE=@valueE and valueF=@valueF")
cmd.Parameters.AddWithValue("@valueF", row.Cells(0).Controls.OfType(Of TextBox)().FirstOrDefault().Text)
cmd.Parameters.AddWithValue("@valueE", row.Cells(2).Controls.OfType(Of TextBox)().FirstOrDefault().Text)
cmd.Parameters.AddWithValue("@valueC", row.Cells(3).Controls.OfType(Of TextBox)().FirstOrDefault().Text)
cmd.Parameters.AddWithValue("@valueD", row.Cells(4).Controls.OfType(Of TextBox)().FirstOrDefault().Text)
cmd.Parameters.AddWithValue("@valueA", row.Cells(6).Controls.OfType(Of TextBox)().FirstOrDefault().Text)
cmd.Parameters.AddWithValue("@valueB", row.Cells(7).Controls.OfType(Of TextBox)().FirstOrDefault().Text)
'cmd.Parameters.AddWithValue("@valueF", GridViewonderzoeksresultaten.DataKeys(row.RowIndex).Value)
Me.ExecuteQuery(cmd, "SELECT")
End If
Next
Me.BindGrid()
End Sub
