I'm writing with regard to a problem I'm encountering when a user edits RadGridView data that has been filtered.

The filtering is being done through a DataView expression, e.g.     CONVERT([NumberOfStaffAvailable],'System.Decimal')>=10

The user then edits the NumberOfStaffAvailable field for one of the displayed rows to be less than 10, so that row is no longer valid as part of the filtered recordset.

When the user presses the Enter key a NullReference exception is thrown, the callstack is listed below.

I've tried calling SuspendLayout() and SuspendUpdate() in the CellBeginEdit event, and resuming them in the CellEndEdit event, but with no luck.

I'd be grateful for any advice on how get around this problem,

I'm using WinControls v. 2016.3.1024.40

Thanks and kind regards

James

System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.WinControls.UI.GridDataCellElement.set_Value(Object value)
   at Telerik.WinControls.UI.GridViewEditManager.EndEditCore(Boolean validate, Boolean cancel)
   at Telerik.WinControls.UI.GridViewEditManager.EndEdit()
   at Telerik.WinControls.UI.GridRowBehavior.ProcessEnterKey(KeyEventArgs keys)
   at Telerik.WinControls.UI.GridRowBehavior.ProcessKey(KeyEventArgs keys)
   at Telerik.WinControls.UI.BaseGridBehavior.ProcessKey(KeyEventArgs keys)
   at Telerik.WinControls.UI.BaseGridBehavior.ProcessKeyDown(KeyEventArgs keys)
   at Telerik.WinControls.UI.BaseGridEditor.OnKeyDown(KeyEventArgs keyEventArgs)
   at Telerik.WinControls.UI.RadTextBoxEditor.OnKeyDown(KeyEventArgs e)
   at Telerik.WinControls.UI.RadTextBoxEditor.TextBoxItem_KeyDown(Object sender, KeyEventArgs e)
   at System.Windows.Forms.KeyEventHandler.Invoke(Object sender, KeyEventArgs e)
   at Telerik.WinControls.RadItem.OnKeyDown(KeyEventArgs e)
   at Telerik.WinControls.UI.RadTextBoxItem.TextBoxControl_KeyDown(Object sender, KeyEventArgs e)
   at System.Windows.Forms.Control.OnKeyDown(KeyEventArgs e)
   at System.Windows.Forms.Control.ProcessKeyEventArgs(Message& m)
   at System.Windows.Forms.Control.ProcessKeyMessage(Message& m)
   at System.Windows.Forms.Control.WmKeyChar(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.TextBoxBase.WndProc(Message& m)
   at System.Windows.Forms.TextBox.WndProc(Message& m)
   at Telerik.WinControls.UI.HostedTextBoxBase.WndProc(Message& message)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Hi,

I fill my grid with one SQL table which contains an int col "SENT".

Its values are -1 for "OK" and 0 for "Not OK".

By default, the radgridview bind checked = 1 and unchecked = 0.

Is it possible to bind the checkbox column of the radgridview with -1=checked and 0=unchecked ?

Thank you.

We have a simple datagrid where the first column contains a Vendor Number and the second is a read-only column containing the name of that vendor.  Users can freely enter into the first column, and in the CellValidation event, we verify that the format of what they entered is correct and then lookup the number they entered to populate the second column with the name.

The function looks something like this:

If a cell enters edit mode and the value is changed, then the value displayed in the cell is not updated with the formatted version.  However, if a cell enters edit mode and then leaves edit mode with no changes, the formatted value from our function is applied.  For example, if you were to add a new row and type "1" in the cell, our format function would convert that to "00001.00", and if you put a breakpoint in the above code, you would see that both Me.dgvVendors.CurrentCell.Value and the vendNum variable would reflect this formatted value.  However, once processing completes, the cell will still read "1" in the UI.

Now, after having done that, if you click the same cell to enter edit mode and then click somewhere else, the same function above will run, only this time the cell in the UI will be updated to display "00001.00" properly.  Likewise, if you edit that formatted value and remove a zero, the function will fail to update the value, but if after doing that, you click on the cell and then leave it without making any changes, it will be formatted again and the missing zero will be added back.  The validating event handler can only update the cell value if that value was not actually changed during editing.

Note: The last line setting e.Row.Cells(1).Value to the Vendor Name always works.  We've tried this syntax to apply our updated Vendor Number to Cells(0), but get the exact same results as using Me.dgvVendors.CurrentCell.Value.

Any idea what's going on here or how to correct it?

I use RadGridView and have custom cell element.

I set row height = 300.

For custom cell element, i use RadHostItem to create childe
Ex: 

Result (see the picture in attachments)

Thanks and kind regards

Paul

Hi,

I have inherited a scheduler like this:

Public Class Test
    Inherits RadScheduler

End Class

All works very fine. But i have trouble with themes.

I added a application-wide theme like this:

   Dim visualStudio2012LightTheme1 = New Themes.VisualStudio2012LightTheme()
   ThemeResolutionService.ApplicationThemeName = visualStudio2012LightTheme1.ThemeName

The SchedulerNavigator (also in my Form) changed its style, but my inherited scheduler do not. The scrollbar on the right side has the new theme, and the appointment form and all other "subcontrols".

More details in screenshot.

Can you help me?

Hello,

I tried to bring our scatter plot chart feature from our website to our winform application.

I tried to use chartview to implement this feature, then I cannot find an option to add title into x-axis and y-axis.

So what should I do to add title into x-axis and y-axis?

Attachment #1 is in website version

Attachment #2 is in winform version

Regard,

Paul

Hello,

I tried to create a scatter plot chart just like attachment 1. Then I tried to show checkbox to show/ hide it's series points.

In this case, the long labels have been overlap and I tried to style for legend items to make the labels is next to the checkbox but I cannot find the solution.

So what should I do to do like that?

Regard,

Paul

Hello,

I tried to update icons for: options, pin and close buttons just like attachment #1 then the background of 3 buttons always white although I tried many ways to change it (the result is attachment #2).

So what should I do to change these 3 buttons's icon?

3 sample icons have been attached in the attachment section

Regard,

Paul

How to firing enter key only on column 1 or 2 ...

have this code ... 

    Private Sub GridList_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles GridList.KeyDown
        If e.KeyCode = Keys.Enter Then
                 Msgbox "Enter KeyPress" 

       End If

    End Sub