Using the data source wizard to create a data connection to a SQL database in VS2010. The following code was created:Me.TblPartsTableAdapter.Fill(Me.KanbanDataSet.tblParts)
I assume ( probably wrongly) that since the text boxes and combobox that are bound to this database contain the correct data that a connection has been established and the dataset filled. So I want to query this data with a selected change event. I declare global variables Dim strprocess As StringDim strpart As String = Nothing
Then under the selected change event I use: strprocess = cboprocess.SelectedValue strpart = "SELECT PartNumber FROM tblParts WHERE Process = @Process" Dim cmd As SqlClient.SqlCommand = New SqlClient.SqlCommand(strpart) cmd.CommandType = CommandType.Text cmd.Parameters.AddWithValue("@Process", strprocess) Dim someDatatable As New DataTable Dim myReader As SqlClient.SqlDataReader = cmd.ExecuteReader If myReader.HasRows Then someDatatable.Load(myReader) End If
The above code should take the selectedvalue of cboprocess put in the query and return a value to strpart. Then I will bind the results to cbopartnmber. When running the code I receive this error:ExecuteReader: Connection property has not been initialized.I think generally this means the connection is not open but itf its not open how is there data in the dataset. Is the datasource wizard a big POS?