How to refresh a dataGridView - vb.net

Question

I have a problem refreshing a DataGridView control after Insert or Update. The source code:
Get all rows from table in datatable and set to the datasource:
Dim dt1 as DataTable = GetData("SELECT * FROM CLAIMSTATE ")
dataGrid.DataSource = dt1
Update Event if ID is valued, and Insert if it isn't:
Private Sub dataGrid_RowLeave(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dataGrid.RowLeave
Dim row As DataGridViewRow = CType(sender, DataGridView).Rows(e.RowIndex)
Dim query As New StringBuilder("")
If row.Cells(0).Value & "" = "" Then
query.Append("INSERT INTO CLAIMSTATE ")
query.Append("(CST_CODE, CST_LABEL, CST_POINTS)")
query.Append("VALUES ")
query.Append("(?, ?, ?)")
Else
query.Append("Update CLAIMSTATE ")
query.Append("SET CST_CODE = ?, ")
query.Append("CST_LABEL = ?, ")
query.Append("CST_POINTS = ? ")
query.Append("WHERE CST_ID = ? ")
End If
Dim command As New OdbcCommand(query.ToString(), con)
command.Parameters.Add("#cst_code", OdbcType.Char).Value = row.Cells(1).Value
command.Parameters.Add("#cst_label", OdbcType.NVarChar).Value = row.Cells(2).Value
command.Parameters.Add("#cst_points", OdbcType.Decimal).Value = row.Cells(3).Value
command.Parameters.Add("#cst_id", OdbcType.BigInt).Value = row.Cells(0).Value
Dim res As Integer = ExecuteNonQuery(command)
End Sub
Public Function GetData(ByRef sqlQuery As String) As DataTable
Dim command As New OdbcCommand(sqlQuery, con)
Try
If con.State = ConnectionState.Closed Then
con.ConnectionString = conString
con.Open()
End If
Using dr As OdbcDataReader = command.ExecuteReader()
Dim dt As New DataTable()
dt.Load(dr)
Return dt
End Using
'con.Close()
Catch ex As Exception
MsgBox(ex.Message)
con.Close()
Return Null
End Try
End Function
Public Function ExecuteNonQuery(ByRef command As OdbcCommand) As Integer
Dim result As Integer = 0
If con.State = ConnectionState.Closed Then
con.ConnectionString = conString
con.Open()
End If
'Dim command As New OdbcCommand(sqlQuery, conn)
Try
'command.Connection = con
'Dim cmd As New OdbcCommand( sqlQuery, conn)
result = command.ExecuteNonQuery()
Catch
result = 0
If con IsNot Nothing Then
con.Close()
command.Dispose()
End If
Finally
command.Dispose()
End Try
Return result
End Function
I tried to get all records from the table and set the datasource again at the end of the method but it doesn't work.
If I put the code:
dataGrid.Rows.Clear()
dataGrid.Columns.Clear()
dt1 = GetData("SELECT * FROM CLAIMSTATE ")
dataGrid.DataSource = dt1
on end of event method RowLeave I recive this error:
"Operation is not valid because it results in a reentrant call to the
SetCurrentCellAddressCore function"
on dataGrid.Rows.Clear(), but if I remove the line codes Rows.Clear() and Columns.Clear(), the debug cursor after execute dataGrid.DataSource = dt1 return to begin of event method an execute some code again and after I recive the some error "...reentrant call to the SetCurrentCellAddressCore function"!
Help me, please!

Answer 1

Here is a C# class I have that I use to connect search my GridView. What you need should be similar I would think.
protected void lbSearch_Click(object sender, EventArgs e)
{
if (txtSearch.Text.Trim().Length > 0)
{
odsInbox.FilterExpression =
string.Format("(l_name LIKE '*{0}*') OR (f_name LIKE '*{0}*') OR (title LIKE '*{0}*')",
txtSearch.Text);
}
else
{
odsInbox.FilterExpression = string.Empty;
}
gvInbox.DataBind();
}
protected void lbClear_Click(object sender, EventArgs e)
{
odsInbox.FilterExpression = string.Empty;
txtSearch.Text = "";
gvInbox.DataBind();
}
I hope this gets you on the right track.

Answer 2

For solving this problem I use OdbcDataAdapter. I save all changes with adapter.Update(dataTable) and after I fill the datatable again: adapter.fill(dataTable).