IGridEditableColumn

protected void RadGrid1_UpdateCommand(object source, Telerik.Web.UI.GridCommandEventArgs e)
        {
                GridEditableItem editedItem = e.Item as GridEditableItem;
                GridEditManager editMan = editedItem.EditManager;

                foreach( GridColumn column in e.Item.OwnerTableView.RenderColumns )
                {
                    if ( column is IGridEditableColumn )
                    {
                        IGridEditableColumn editableCol = (column as IGridEditableColumn);
                        if ( editableCol.IsEditable )
                        {
                            IGridColumnEditor editor = editMan.GetColumnEditor( editableCol );

                            string editorType = editor.ToString();
                            string editorText = "unknown";
                            object editorValue = null;

                            if ( editor is GridTextColumnEditor )
                            {
                                editorText = (editor as GridTextColumnEditor).Text;
                                editorValue = (editor as GridTextColumnEditor).Text;
                            }

                            if ( editor is GridBoolColumnEditor )
                            {
                                editorText = (editor as GridBoolColumnEditor).Value.ToString();
                                editorValue = (editor as GridBoolColumnEditor).Value;
                            }

                            if ( editor is GridDropDownColumnEditor )
                            {
                                editorText = (editor as GridDropDownColumnEditor).SelectedText + "; " +
                                    (editor as GridDropDownColumnEditor).SelectedValue;
                                editorValue = (editor as GridDropDownColumnEditor).SelectedValue;
                            }

                            try
                            {
                                DataRow[] changedRows = this.EmployeesData.Tables["Employees"].Select( "EmployeeID = " + editedItem.OwnerTableView.DataKeyValues[editedItem.ItemIndex]["EmployeeID"] );
                                changedRows[0][column.UniqueName] = editorValue;
                                this.EmployeesData.Tables["Employees"].AcceptChanges();
                            }
                            catch(Exception ex)
                            {
                                RadGrid1.Controls.Add(new LiteralControl ("<strong>Unable to set value of column '" + column.UniqueName + "'</strong> - " + ex.Message));
                                e.Canceled = true;
                                break;
                            }
                        }
                    }
                }
        }

Private Sub RadGrid1_UpdateCommand(ByVal source As System.Object, ByVal e As Telerik.Web.UI.GridCommandEventArgs) Handles RadGrid1.UpdateCommand

            Dim editedItem As GridEditableItem = CType(e.Item, GridEditableItem)
            Dim editMan As GridEditManager = editedItem.EditManager

            Dim column As GridColumn

            For Each column In e.Item.OwnerTableView.Columns
                If Typeof column Is IGridEditableColumn Then
                    Dim editableCol As IGridEditableColumn = CType(column, IGridEditableColumn)
                    If (editableCol.IsEditable) Then
                        Dim editor As IGridColumnEditor = editMan.GetColumnEditor(editableCol)

                        Dim editorType As String = CType(editor, Object).ToString()
                        Dim editorText As String = "unknown"
                        Dim editorValue As Object = Nothing

                        If (Typeof editor Is GridTextColumnEditor) Then
                            editorText = CType(editor, GridTextColumnEditor).Text
                            editorValue = CType(editor, GridTextColumnEditor).Text
                        End If

                        If (Typeof editor Is GridBoolColumnEditor) Then
                            editorText = CType(editor, GridBoolColumnEditor).Value.ToString()
                            editorValue = CType(editor, GridBoolColumnEditor).Value
                        End If

                        If (Typeof editor Is GridDropDownColumnEditor) Then
                            editorText = CType(editor, GridDropDownColumnEditor).SelectedText & "; " & CType(editor, GridDropDownColumnEditor).SelectedValue
                            editorValue = CType(editor, GridDropDownColumnEditor).SelectedValue
                        End If

                        Try
                            Dim changedRows As DataRow() = Me.EmployeesData.Tables("Employees").Select("EmployeeID = " & editedItem.OwnerTableView.DataKeyValues(editedItem.ItemIndex)("EmployeeID"))
                            changedRows(0)(column.UniqueName) = editorValue
                            Me.EmployeesData.Tables("Employees").AcceptChanges()
                        Catch ex As Exception
                            RadGrid1.Controls.Add(New LiteralControl("<strong>Unable to set value of column '" & column.UniqueName & "'</strong> - " + ex.Message))
                            e.Canceled = True
                        End Try

                    End If
                End If
            Next
        End Sub