Is it possible to create an Items Collection during design time to fill a combobox such as I can with a combobox on a form? 

System.NullReferenceException was unhandled
  Message="Object reference not set to an instance of an object."
  Source="Telerik.WinControls.GridView"
  StackTrace:
       at Telerik.WinControls.Data.DataAccessComponent.get_IsHasValidChildTemplates()
       at Telerik.WinControls.UI.GridViewTemplate.GetRenderColumns()
       at Telerik.WinControls.UI.GridRowElement.UpdateColumns(NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.UI.GridTableElement.UpdateColumns(NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.UI.GridViewTemplate.UpdateColumns(NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.UI.GridViewColumnCollection.NotifyListenersCollectionChanged(NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.Data.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.UI.GridViewColumnCollection.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
       at Telerik.WinControls.Data.ObservableCollection`1.ClearItems()
       at Telerik.WinControls.Data.ItemObservableCollection`1.ClearItems()
       at Telerik.WinControls.UI.GridViewColumnCollection.ClearItems()
       at Telerik.WinControls.Data.DataAccessComponent.Dispose(Boolean disposing)
       at Telerik.WinControls.UI.GridViewTemplate.Dispose(Boolean disposing)
       at System.ComponentModel.Component.Finalize()
  InnerException:


This error comes every time(almost everytime) I close my app. Any pointers will be appreciated.

Hi

Dear Friends,

I am facing problem with border of split panel in a split container.
 my requirement is one split panel in the split container must not show any borders but i am unable to do that...
i tried BorderStyle property but no use.

so what is the technique should be  fallow to disable borders of a split panel in the split container?

Thanks,
Regards,
Hari

I have a gridview populated using a datatable.  Within my gridview I have 2 buttons "Up" and "Down".  The "Up" button takes the selected row and moves it up one row.  The "Down" button takes the selected row down a row.  The way i'm doing this is updating a column called "Order" and having my grid sorted by Page and Order columns.  If going up I swap order values within the grid with the row above the selected row and the opposite for down.   I have to be able to insert, delete and move rows up and down.  I'm trying to keep track of the grid rowindex and update that cell.
Ex.
Row# Page Order Text
1 1 10 Test1
2 1 20 Test2
3 1 30 Test3
Say I move row# 2 up now It should look like this
1 1 10 Test2
2 1 20 Test1
3 1 30 Test3
My problem is if I try and add a new row between rows#1-2 I should have 
1 1 10 Test2
2 1 20 Test4
3 1 30 Test1
4 1 40 Test3

Should I be updating my datatable?  I'm updating my grid.  Here is my RowChanging event

private void gv_RowsChanging(object sender, GridViewCollectionChangingEventArgs e)

{

if (e.Action == Telerik.WinControls.Data.NotifyCollectionChangedAction.Add)

{

RowSetup = e.NewItems[0] as GridViewDataRowInfo;

RowSetup.Cells["ID"].Value = gv.Rows[e.NewStartingIndex - 1].Cells["ID"].Value;

RowSetup.Cells["PAGE"].Value = gv.Rows[e.NewStartingIndex - 1].Cells["PAGE"].Value;

RowSetup.Cells["ORDER"].Value = Convert.ToInt32(gv.Rows[e.NewStartingIndex - 1].Cells["ORDER"].Value) + Convert.ToDecimal(".5");

foreach (GridViewRowInfo dri in gv.Rows)

{

if (dri.Cells["PAGE"].Value.ToString() == RowSetup.Cells["PAGE"].Value.ToString())

{

if (Convert.ToDecimal(dri.Cells["ORDER"].Value) > Convert.ToDecimal(RowSetup.Cells["ORDER"].Value))

{

dri.Cells["ORDER"].Value = Convert.ToInt32(dri.Cells["ORDER"].Value) + 1;

}

}

}

RowSetup.Cells["ORDER"].Value = Convert.ToDecimal(gv.Rows[e.NewStartingIndex].Cells["ORDER"].Value) + Convert.ToDecimal(".5");

}

}

Thank you for any light you can shed on this.

I have posted this question already last night, but it seems that it disappeared.
I have a RadButton with an image, all default settings. At run time, when I click on the button, the image moves slightly to the right and down. But when I release the mouse button the image remains in the new position
What is happening and how do I make it go back to the original location after the mouse click release?

Hi all,

I have a grid with a combobox column and I have come to realize that filtering a combobox grid column is a problem. The only way to clear the filter in these types of column is to enter a blank value in the 'Custom' option. If I use the 'NoFilter' option, it works temporarily until I renable the filter, in which case I have the same issue. Has anyone else faced the same problem?

I tried the following methods: -

1. Add a blank entry at the top of the combobox before binding. I was hoping somehow I can capture when the user selects this blank value and clear the filter, but I haven't been able to do so (from within the filterchanged event).
2. I tried to capture when users select the 'NoFilter' option and clear the existing filter expression but that doesn't seem to work either.

If anyone has come across this scenario, please post the solution (and code if available). Thanks!

Regards,
MP

Hello.

Hi there,

Hello,