How to change the color of the cell when I changed its value?
Is it possible?

Let me specific here.....................

I have a grid with interactive filtering enabled. If the users clicks on a
button which is placed inside the grid to edit the record on another form, I get the GridViewInfo.RowIndex to access the Row.

However, when Filtering is active, the RowIndex in the Event does not
point to the correct Row, when I access the

index = RadGridView1.CurrentRow.GridViewInfo.CurrentIndex;

The GridViewInfo.RowIndex seems to point to the unfiltered row
index, while grid.Rows[] contains only the filtered rows.

What shall i do...I am using C# and Telerik Windows Q1 2009

how i can convert viewInfo.GridViewElement in Q2 2012

hello how i can convert this Code to Q2 2012 


Thank you 
Mahmoud Salem

 

I build a winform application with some grid-views, when I invoking anything (textboxes, the main form and more) I am getting exception: Object reference not set to an instance of an object.

I really don’t know what to do; we are in an advance project developing so replaceing the telerik components will not the best idea.

Any suggestions?

 

(see stack trace below)

   at Telerik.WinControls.UI.GridVirtualizedRowElement.DetachCells()

   at Telerik.WinControls.UI.GridVirtualizedRowElement.Detach()

   at Telerik.WinControls.UI.GridDataRowElement.Detach()

   at Telerik.WinControls.UI.GridRowElement.DisposeManagedResources()

   at Telerik.WinControls.DisposableObject.PerformDispose(Boolean disposing)

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.RadElement.DisposeChildren()

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.RadElement.DisposeChildren()

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.RadElement.DisposeChildren()

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.RadElement.DisposeChildren()

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.RadElement.DisposeChildren()

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.RadElement.DisposeChildren()

   at Telerik.WinControls.RadElement.PerformDispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose(Boolean disposing)

   at Telerik.WinControls.DisposableObject.Dispose()

   at Telerik.WinControls.ComponentThemableElementTree.Dispose(Boolean disposing)

   at Telerik.WinControls.RadElementTree.Dispose()

   at Telerik.WinControls.RadControl.Dispose(Boolean disposing)

   at Telerik.WinControls.UI.RadGridView.Dispose(Boolean disposing)

   at System.ComponentModel.Component.Dispose()

   at System.Windows.Forms.Control.Dispose(Boolean disposing)

   at System.ComponentModel.Component.Dispose()

   at System.Windows.Forms.Control.Dispose(Boolean disposing)

   at Telerik.WinControls.RadControl.Dispose(Boolean disposing)

   at System.ComponentModel.Component.Dispose()

   at System.Windows.Forms.Control.Dispose(Boolean disposing)

   at System.Windows.Forms.Form.Dispose(Boolean disposing)

   at Telerik.WinControls.UI.RadFormControlBase.Dispose(Boolean disposing)

   at Telerik.WinControls.UI.RadForm.Dispose(Boolean disposing)

   at Generic_EI.CELL_PC.Dispose(Boolean disposing) in C:\DevelopZone\TowerProjects\Fab1Automation\NEW_CELL_PC\Generic_EI\CELL_PC.Designer.cs:line 20

   at System.ComponentModel.Component.Dispose()

   at System.Windows.Forms.ApplicationContext.Dispose(Boolean disposing)

   at System.Windows.Forms.Application.ThreadContext.DisposeThreadWindows()

Hi,

I'm trying to use pageview backstage mode in my multi-threading application, but I always get the following error:

"Object reference not set to an instance of an object"

Basically, I create a new thread and in that thread I am trying to make a specific item button and the related page selected. Below is the code:

Dim CurrentTask As Integer = 1

Dim backStageElement As RadPageViewBackstageElement

Private Sub Form1_Load(sender As Object, e As System.EventArgs) Handles Me.Load

Control.CheckForIllegalCrossThreadCalls = False

Dim checkcurrenttaskthread As New Threading.Thread(AddressOf checkcurrenttask)

checkcurrenttaskthread.Start()

End Sub

Public Sub checkcurrenttask()

While True

If CurrentTask = 1 Then

backStageElement =

TryCast(RadPageView1.ViewElement, RadPageViewBackstageElement)

backStageElement.Items(0).IsSelected = True

RadPageView1.SelectedPage = RadPageView1.Pages(0)

End If

End While

End Sub

Is it because I call the pageview control in a thread-unsafe way? How can I get rid of that error?

Thanks in advance!               

I'm using a listview with custom items to display formatted data from our database.

For some reason, I can't seem to get rid of the pesky checkboxes for each item. I've got the following properties defined...at this point both in the visual editor as well as in code that runs after the form on load method.



Guessing there is something happening with how I'm creating and configuring the custom items. 

using:


I initialize this class (modeled after the Telerik custom item demo)



Obviously something, somewhere, is overriding my definition that checkboxes should not be visible, but I can't seem to track it down.

Any help is appreciated. More code can be provided if need be, but wanted to provide the "most relevant" snippets first.

Additionally, for bonus appreciation, I'm seeing the following (new to Telerik, so probably some noobie issues):
- I'm binding to the listview using a List<Entities> from MS Entity Framework. No matter what I seem to do, the list of entities seems to be overlaid on the visual elements shown above to get messy overlap. Ideally I would hide the data from each item with the exception of the data flowing through the custom visual elements
- I've tried a variety of NotifyParentOnMouseInput and ShouldHandleMouseInput configurations, but I still am not able to click on a list item to select. It could be that clicking a row automatically processes the checkbox instead of selecting the item? I'll know once I resolve the issue above. I am however able to use the keyboard up and down arrows to move up and down the list, selecting items as I go.

Hi Team,
I am binding grid to the out put of a stored procedure on page load.

I see some dummy blank rows getting added. Can you please let know on how i can remove this.
[ I have checked my stored procedure and it is not returning any blank row]

***********************************
I am adding the summary row like this. The below code is in page load.

I have ViewCellFormatting & CellFormatting events which is used to add $ symbol and replace - of negative number with ()
Ex: -5 will become ($5)

private void radgrid_ViewCellFormatting_1(object sender, CellFormattingEventArgs e)
        {
           
                GridSummaryCellElement cell = e.CellElement as GridSummaryCellElement;
                if (e.CellElement != null)
                {
                    if (e.CellElement.Text.Contains("$-"))
                    {
                        e.CellElement.Text = e.CellElement.Text.Replace("$", "").Replace("-", "($") + ")";
                        e.CellElement.TextAlignment = ContentAlignment.MiddleRight;
                    }
                }
          }

private void radgrid_CellFormatting(object sender, CellFormattingEventArgs e)
        {
                GridSummaryCellElement cell = e.CellElement as GridSummaryCellElement;
                if (e.CellElement != null)
                {
                    if (e.CellElement.Text.Contains("$-"))
                    {
                        e.CellElement.Text = e.CellElement.Text.Replace("$", "").Replace("-", "($") + ")";
                        e.CellElement.TextAlignment = ContentAlignment.MiddleRight;
                    }
                }
        
}

After writing the above code, the -ve sign in a column in the  total row does not show up with () on page load. It still appears as $-5, but on click on any cell, it gets changed to  ($5)
Can you pls help.

Regards,
-Vikas

I have created a custom column by inheriting from GridViewDataColumn (and GridDataCellElement and BaseGridEditor and LightvisualElement)

When used, the column is databound to an object (often an Entity Framework Entity).

If I try to sort on the column, it doesn't work in any meaningful way, probably because the grid doesn't know how to sort the objects the column is databound to.

Is there a way for the column to control how it is sorted ?

I'd rather not use the custom sorting features of the grid, then I would have to implement it on all grids using the column (the column is rather generic and used all over).

The logic I would like to implement is quite similar to logic of the DisplayMemberSort property in GridViewComboBoxColumn (sorting on something else than the value the column is databound to).

Peeking at the code of GridViewComboBoxColumn, it seems as it is implementing this functionality by overriding the GetValue method, and looking at the GridViewDataOperation flag. However, the GetValue method is internal, so I can't do the same in my column class.

Thanks /Hannes

Hi,

Is it possible to change the Values section of the RadPivotFieldList component to display a value instead of counting the values?

Cheers

Shaun.