Hello,

I contact you because I have 2 questions about the events of RagGridView control.

1. I have 2 columns in my GridView (one GridViewTextBoxColumn readonly and one GridViewDecimalColumn editable). The decimal column can have a null value or a decimal value.
   I handle these events : CellValidating, RowValidating and RowValidated. In the CellValidating, I check if my decimal column has a value and in this case it must be between min and max value and display the Row.ErrorText and cancelling the validating event. However if the decimal value is null, I have to ask the user a confirmation when the row is validating, so I do that in the RowValidating event. If the user does not confirm, I cancel the RowValidating and I would like to set the decimal cell as the current cell and BeginEdit. Is it possible in the RowValidating event set a current cell and BeginEdit (in a new row or an existing row) ?
2. In the GridView I register a custom GridNewRowBehavior and override the ProcessEscapeKey method that execute this code :
   bool canceled = this.GridViewElement.CancelEdit();
   this.GridControl.MasterView.TableAddNewRow.CancelAddNewRow();
   return canceled;       If the gridView is in edit mode on the new row or an existing row and I press the Escape key, my custom behaviour performs perfectly this treatment. But the RowValidating and RowValidated events in my form fires. How can I detect in these events that the edit mode is canceling because I would like to reset some properties ?

Thank you
Fabrizio

I want to exclude some columns from searching.  I set the column AllowSearching = false.  The column name is still showing in the 'Search in Columns' menu unchecked.  Can I hide those columns?  I tried :

DirectCast(DirectCast(e.ContextMenu, Telerik.WinControls.UI.RadDropDownButtonPopup).Items(0), Telerik.WinControls.UI.RadMenuItem).Items(i).Visibility = ElementVisibility.Hidden

It hides the menu item with the column name but showing a empty item in the position.  Anyway I can make it disappear?

Thanks.

So what I have to do basically is create an Excel report of the selected rows of my RadGridView and create a header on the first few rows (above my RadGridView data) with a little information about the report so like the time it was created for example. For now, I'm using GridViewSpreadExport class and passing the RadGridView into the constructor and using the SpreadExportRenderer class. and calling RunExport(...). So I guess my questions are:

1.) I seen 3 different ways to export  RadGridView data to Excel: GridViewSpreadExport, GridViewSpreadStreamExport, and ExportToExcelML. Which one is best for what I'm trying to accomplish? 

2.) How can I just export the data of the selected rows of the RadGridView?

3.) Is there a way to export 2 RadGridView to the same Excel sheet? 

Hi,

Is there a way to hide the column header, for example, I want to  hide first column header and shift the item to the left. 

Many thanks,

Omar

Using the new open file dialog, set MultiSelect = true

If you only select 1 file, the Open button is disable until you select at least 1 more file

Hi, 

How can I disable the pinch gesture (aka two finger zoom in or out) which is changing the row height (undesired). For fixing the row height, I have set AllowRowResize = false. With the gesture, the row height can still be made very small or very large with this set to false. This is for version 2014.3.1202.40 of the GridView.

Thanks!

Alan

I'm testing gridview and add cell values manually without using any datasource.

I'd like to show navigator control for the rows of gridview.

Is there any way to do so?

Hi,

I am overriding ProcessCmdKey to detect when a user press a combination of keys to scroll up and down in the pdfViewer. I'm currently using .PageUp() and .PageDown(), but of course that goes up and down whole pages.

I understand that pdfViewer already has shortcuts using the arrow keys, but that requires that the pdfViewer control be in focus. For our purposes, the user prefers to not lose focus on whatever control they are using, for example, typing in data from the pdf without losing focus of the textbox.

Is there any way that I can use the native function of the Up and Down keys with pdfViewer without requiring that the pdfViewer control be in focus? If I cannot do so, how may I replicate scrolling behavior with my own chosen shortcuts?

        private void ScrollPDFViewer(Keys keyData)
        {

            if (keyData == (Keys.Up | Keys.Control))
            {
                this.radPdfViewer.PageUp();

// this.radPdfViewer.PdfViewerElement.Scroller.UpdateScrollValue();
            }
            else if (keyData == (Keys.Down | Keys.Control))
            {
                this.radPdfViewer.PageDown();
            }
        }

I have a RadGridView with EnableGrouping = True and AutoSize = true. When I drag a column to group by it I get an "Exception Unhandled" error in my Program.Cs file;

System.Reflection.TargetInvocationException
  HResult=0x80131604
  Message=Exception has been thrown by the target of an invocation.
  Source=mscorlib
  StackTrace:
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Delegate.DynamicInvokeImpl(Object[] args)
   at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)
   at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)
   at System.Windows.Forms.Control.InvokeMarshaledCallbacks()
   at System.Windows.Forms.Control.WndProc(Message& m)
   at Telerik.WinControls.RadControl.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
   at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at TDT.Program.Main() in C:\Users\0123456789\Documents\Visual Studio Projects\TDT\TDT\Program.cs:line 19

Inner Exception 1:
InvalidOperationException: MeasureOverride returned positive infinity: Telerik.WinControls.UI.GroupPanelElement

Any suggestions for a workaround?