Questions on UI for WinForms Forum

1 answer

111 views

Error when switching windows

Hi everybody,

I get an .Net Framework Exception while switching between Windows :(

System.NullReferenceException: Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.

bei Telerik.WinControls.UI.TableViewRowLayoutBase.InvalidateRenderColumns()

bei Telerik.WinControls.UI.TableViewRowLayout.InvalidateRenderColumns()

bei Telerik.WinControls.UI.RowsContainerElement.UpdateWhenColumnsChanged()

bei Telerik.WinControls.UI.GridTableElement.ProcessTemplateEvent(GridViewEvent eventData)

bei Telerik.WinControls.UI.GridTableElement.Telerik.WinControls.UI.IGridViewEventListener.ProcessEvent(GridViewEvent eventData)

bei Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode)

bei Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessEvent(GridViewEvent gridEvent)

bei Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent)

bei Telerik.WinControls.UI.GridViewSynchronizationService.OnPostCallback(Object state)

I don't even know which grid it is, or how to handle it, because my application is still running whithout any evect.

GridView

answered on 01 Oct 2010

8 answers

232 views

ExportToExcelML Problem Q2 2010

Hello,

RunExport throws now this Exception: "Cannot find any base cell element!".

My Code:

ExportToExcelML exporter = new ExportToExcelML(gridview);
            exporter.HiddenColumnOption = HiddenOption.DoNotExport;
            exporter.ExportVisualSettings = true;
            exporter.SummariesExportOption = SummariesOption.ExportOnlyBottom;
            exporter.HiddenRowOption = HiddenOption.DoNotExport;
            exporter.SheetName = "Export";

            string filename = Path.Combine(Path.GetTempPath(), "excel_export.xls");

            try
            {
                exporter.RunExport(filename);
                return filename;
            }
            catch (Exception e)
            {
                return string.Empty;
            }

I have no idea what i have to change.

Regards,
Thomas

GridView

answered on 01 Oct 2010

4 answers

550 views

Row's cell value doesn't update when datasource changed.

Ok

I have a simple but annoying problem.

A datatable bound to a radgridview and 1 column is checkboxcolumn. If user clicks the checkboxcolumn, cell goes to edit mode bot not changed the value on the datatable. After press enter button or selecting a different row value changes on datasource.
so I wrote a code for close editor on value changed

private void RouteGrid_ValueChanged(object sender, EventArgs e)

{
RadCheckBoxEditor editor = sender as RadCheckBoxEditor;

if (editor != null)

{

(editor.EditorManager as GridViewEditManager).CloseEditor();

}
}

But my problem is if i want to change the source all values on the grid changes except selected row or current row. I changed all the property of the rows and cells property (IsSelected,IsCurrent...) but value never changes.

Here is my code

private void btnCancelChanges_Click(object sender, EventArgs e)

{

RouteGrid1.CurrentRow = null;

RouteGrid1.Enabled = false;

if (MessageBox.Show("...", "...", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.OK)

{

DataRow[] Result = null;

this.Cursor = Cursors.WaitCursor;

foreach (DataTable routeTable in viewSalesmanInfo.RouteTableCollection)

{

if (routeTable != null && routeTable.Rows.Count > 0 && !String.IsNullOrEmpty(routeTable.TableName))

{

Result = routeTable.Select("m_Current_State_Id = 0 AND Current_State_Id = -1");

if (Result != null && Result.Length > 0)

foreach (DataRow addCustomer in Result)

routeTable.Rows.Remove(addCustomer);

Result = routeTable.Select(

"(OrderRoute <> m_OrderRoute Or " +

"PaymentRoute <> m_PaymentRoute Or " +

"DeliveryRoute <> m_DeliveryRoute Or " +

"MergeRoute <> m_MergeRoute Or " +

"Route_Position <> m_Route_Position)" +

" OR m_Current_State_Id <> Current_State_Id");

if (Result != null && Result.Length > 0)

foreach (DataRow updateCustomer in Result)

{

updateCustomer.BeginEdit();

updateCustomer["Current_State_Id"] = updateCustomer["m_Current_State_Id"];

updateCustomer["Route_Position"] = updateCustomer["m_Route_Position"];

updateCustomer["MergeRoute"] = updateCustomer["m_MergeRoute"];

updateCustomer["OrderRoute"] = updateCustomer["m_OrderRoute"];

updateCustomer["PaymentRoute"] = updateCustomer["m_PaymentRoute"];

updateCustomer["DeliveryRoute"] = updateCustomer["m_DeliveryRoute"];

updateCustomer.EndEdit();

}

this.Cursor = Cursors.Default;

this.RouteGrid1.MasterTemplate.Refresh();

RouteGrid1.Enabled = true;

}

But after this selected cell value doesnt change.

Is this a bug or is there anything wrong in my code?

GridView

answered on 01 Oct 2010

8 answers

416 views

convert GridviewSummaryItem aggregate value

I have the following code and I need to convert the value that comes from GridAggregateFunction.sum,

Dim summary As New GridViewSummaryItem("dur", " Total: {0} ", GridAggregateFunction.Sum)

Me.grdResults.MasterTemplate.SummaryRowGroupHeaders.Add(New GridViewSummaryRowItem(New GridViewSummaryItem() {summary}))

The values in the dur column are in seconds and I need to convert that to hh:mm:ss. I have a function that will do the conversion but don't see how to call it on that value (GridAggregateFunction.Sum) before it is displayed in the grid.

I tried several things in the ViewCellFormatting and CellFormatting events but that just causes my app to throw a TargetInvocationException error everytime I start it.

Any ideas would be greatly apprectiated.

GridView

answered on 01 Oct 2010

1 answer

149 views

Dont allow docking on certain dock controls

Alright I have a Dock Manager with a Docked Tabbed Window and several DockWindow's Docked to the Right Side of the Winform App. Now is there any way I can make it so it WONT allow any of my other DockWindows to be able to dock to that Tabbed document? I dont see any propertys on my inheritted DockWindow/UserDockControl.

Dock

answered on 01 Oct 2010

1 answer

115 views

System dialogs

Hi all,

I am using Telerik RadControls for WinForms 2010Q2 on Win2003 Server, implementing in dotnet 3.5 on Visual Studio 2008. I can't find in RadControls documentation anything about dialog controls for opening files or selecting folders, thus I am using standard OpenFileDialog and OpenFolderDialog. Are there equivalent RadControls? Or is there a way to style standard dialogs like RadControls?

Thanks
Roberto

General Discussions

answered on 01 Oct 2010

1 answer

138 views

How to Apply different Hierarchy Level to individual Rows of Rad Grid View

Hi,
I need to have different hierarchy levels to individual row of Rad Gid view in my winform application.
Like-
A
B
:..X
C
:..Y
:..Z

As shown above A,B,C are the Rows of same Rad Grid view but all having different hierarchy Levels
A does not have any hierarchy .
B is having one child gird named X.
C is having one child grid name Y and every row of Y having one child grid Z.
I am having 3 buttons in my application 1,2,3.
on button click 1 i want to add A type row to Rad grid.
on button click 2 i want to add B type row to Rad grid.
on button click 3 i want to add C type row to Rad grid.

How to perform this Operation with Rad Gid for Winfoms in Visual Studio 2008 (Dot Net Framework 3.5) Sp1
in C# .net

Regards
Gaurav

GridView

answered on 01 Oct 2010

6 answers

817 views

click event handler for contextmenu items

I think this is an easy one, but I'm not seeing how to do it. I want to write event handlers for the menu items in the radscheduler context menu. For example, I want to write the code for "Next View."

Anybody done this? Thanks in advance for your help. I hope you get lots of points. :)

Scheduler and Reminder

answered on 30 Sep 2010

11 answers

582 views

Appointment Description is not display in schedule

Hi Experts,

I install the new release of Telerik Q2 2010 SP1 and it looks like the appointment description are not displayed anymore in the schedule!?!?! In your demo I obtain the same behavior.

How can I display the appointment description in the schedule with Q2 2010 SP1?

Regards,
Nadia

Scheduler and Reminder

answered on 30 Sep 2010

5 answers

126 views

RadGalleryElement without RibbonBar

Hello!

I want to use the RadGalleryElement on a Standard RadForm. Does anybody know how to extract/use the RadGalleryElement without a RibbonBar? Or maybe the RibbonBarGroup without a RibbonBar?

Thanks for any help!
Regards
Juergen

RibbonBar

answered on 30 Sep 2010