Hello,

In GridView row opened for edit, after changing some cells values, how can I enable the user to cancel the changes done and retreive the previous values?
In many appliactions, clicking on Escape cancels the edit of the row fields (if the user didn't focus out of the row yet).

Why doesn't the following code work?

imageContainer1.Image = ((GridViewCellInfoCollection)multiColumnComboBoxPhysicans.SelectedItem)["Image"];

I'm getting the following error:

Cannot implicitly convert type 'Telerik.WinControls.UI.GridViewCellInfo' to 'System.Drawing.Image'.

Hi,

I'm using the GridView from version 2014 Q1 SP1.

I filled the Grid in Unbound Mode (autogeneratecolumns=false), and added a child hierarchy using Load-On-Demand (ResourceNeeded event).
The Top Level (MasterTemplate) is fully loaded into the Grid in no time, about 8000 records.

Scrolling down using the Scrollbar is fast, and selecting the bottom record is fast as well.

But selecting the last record using GridNavigator.SelectLastRow is very slow (about 10 seconds). 
SelectFirstRow afterwards is immediate, SelectLastRow again is still slow at about 10 seconds.

Using DeferRefresh does not change a thing.

How can I speed this (SelectLastRow) up?

Hello 
Can anyone tell me, how to select the items using 
RECTANGLE SELECTION 


/ / Draws the backgrounds for Entire ListView items. 
private void listView1_DrawItem (object sender, 
     DrawListViewItemEventArgs e) 
{
     if ((e.State & ListViewItemStates.Selected)! = 0) 
     {
         / / Draw the background and focus rectangle for a selected item. 
         e.Graphics.FillRectangle (Brushes.Maroon, e.Bounds); 
         e.DrawFocusRectangle (); 
     } 
     else 
     {
         / / Draw the background for an unselected item. 
         using (LinearGradientBrush brush = 
             new LinearGradientBrush (e.Bounds, Color.Orange, 
             Color.Maroon, LinearGradientMode.Horizontal)) 
         {
             e.Graphics.FillRectangle (brush, e.Bounds); 
         } 
     } 

     / / Draw the item text for views other than the Details view. 
     if (listView1.View! = View.Details) 
     {
         e.DrawText (); 
     } 
}

Hi.

I'm having problems with RadListView, regarding the change of DataSource.

First problem : using an Interface type
Here is what I do : I am using RadListView, in details mode, to list objects, implementing a common interface, let's say IListItem.  As a DataSource, I am using a IListItem[ ].

Let's say I have an array containing two or more types implementing the interface : TypeA and TypeB.
Using that array as the datasource will do nicely.

If I use an array containing only objects of TypeA, the RadListView will create not only columns based on IListItem, but also add columns based on TypeA. Is this a desired behavior? I would expect only to see columns based on IListItem.

I have been able to work around this with ColumnCreating event, adding :

Second problem :

Assuming the same conditions (interface type IListItem, two types implementing it TypeA and TypeB)

At first, the DataSource is defined with a large array, containing both TypeA and TypeB. After a search (the search is full text and made on sqlserver, a new array is then constructed with new objects), the datasource is changed this way :

If it occurs that the new array contains only TypeA, I get a System.Reflection.TargetInvocationException. The stack trace shows the last call from Telerik code comes from : Telerik.WinControls.Data.RadListSource`1.GetBoundValue.

And it looks like the reflection exception is trying to access TypeB directly, instead of using the interface (my exception is in french, but it would probably be object does not match target type). It start in my ColumnCreating method, the event being fired after the datasource update.

That looks a bit to what is described in this thread :
http://www.telerik.com/forums/refresh-data-in-radlistview-problem#Hlgoam9vfkaKvqTGSWdttg

My understanding was that the bug was fixed, but I have been able to work around it this way :

before updating the DataSource. Not clearing the Columns seems to affect the AutoSizeMode defined in ColumnCreating because the columns are all too small after a datasource change. Even with Columns.Clear, the AutoSizeMode is not perfect, but it is still better. One of my columns looks a bit too small, maybe adjusting only  at first time?

Thanks!

I have been playing around with the Telerik GridView and am very impressed with its capabilities.  However, I have tried data binding to an object containing dataanotations (specifically the Display attribute) but the grid seems to be ignoring them.  Is there something I have to do in order to make this work?  I am using .Net version 4 so I think it should be supported.  Any help would be appreciated.

I'm having trouble binding a custom object
All the examples seem to be database/dataset based with separate collections for each dimension.

How would I get a simple hierarchical grid to work with something like below, if I wanted to bind to an object of type List<CarMaker> 

public class CarMaker
{
        public string CompanyName { get; set; }
        public List<CarModel> Models { get; set; }
}

public class CarModel
{
        public string ModelName { get; set; }
}

Hi,

I want to change background of button. I set FillPrimitive/ BackColor 1- 4 to Blue and background of the button is changed to Blue. But when I move my mouse over the button, background of the button isn't changed to other color.

1. I want my button background is blue, when I move my mouse over it, the background is changed to yellow or other color. How can I do this ?
2. I have a lot of buttons in my application so I want apply above style to all my button, How can I do this ?

Thanks.

Hi 
I want to export to excel from radgrid with some formatting and want to free view as well.
By formatting i mean i want to add image and other headers.please refer the attached pdf report.i want to create something like that only.

Hi everybody,

During the action of RadGridView print, how can I increase the height of the Cells(whole row) only which have multiple rows when using (StringFormatFlags.NoClip)

 private void DGV_Main_PrintCellFormatting(object sender, PrintCellFormattingEventArgs e)
        {
            e.PrintCell.StringFormatFlags = StringFormatFlags.NoClip;   
       }