Im a little stuck on some code that im writing
An outline is that i am reading some data in from an SQL database and wantint to display it in a DataGridView on a form. I have confirmed that there is data being returned from the database but am unsure as to why this isnt appearing. I have followed a number of tutorials from the internet but so far non have worked
here is my code
Private Sub PopulateGrid()
Dim Con As New SqlClient.SqlConnection
Dim strCon As String = CropTrackMod.strConn
Dim strCommand As String = "select * from customer"
Try
Con.ConnectionString = strCon
Dim Cm As New SqlClient.SqlCommand(strCommand, Con)
Con.Open()
Dim reader As SqlClient.SqlDataReader = Cm.ExecuteReader()
'test to confirm data received
reader.Read()
MsgBox(reader.Item("ContactName"))
DataGridView1.AutoGenerateColumns = True
DataGridView1.DataSource = reader
DataGridView1.Refresh()
Catch ex As Exception
MessageBox.Show(ex.Message, "Error")
Finally
If Con.State = ConnectionState.Open Then
Con.Close()
End If
End Try
End Sub
i have also tried to implement a datatable but receive a conversion error on the data type any help would be appreciated
thanks guys
You can't bind a datareader directly to a datagridview in WinForms. Instead you could load a datatable with your reader and assign the datatable to the datasource of the DataGridView
Dim dt = new DataTable()
dt.Load(reader)
DataGridView1.AutoGenerateColumns = True
DataGridView1.DataSource = dt
DataGridView1.Refresh()