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Problem for adding context menu on header

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GridView
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Thomas LEBRUN
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Thomas LEBRUN asked on 01 Sep 2009, 04:07 PM
Hi,

I'm trying to add a context menu to the heder of my gridview. I've follow the code found here: http://demos.telerik.com/silverlight/#GridView/HeaderContextMenu

So I've used (I need to use only C# code,no XAML code):

DataGrid =

new SLGrid2();

 

 

GridViewHeaderMenu.SetIsEnabled(DataGrid.CurrentGrid as RadGridView, true);

 



DataGrid.CurrentGrid point to my RadGridView. The problem is that once te code is here:

IEnumerable

 

<GridViewHeaderCell> cells = row.Cells.OfType<GridViewHeaderCell>();

 

 

foreach (GridViewHeaderCell cell in cells)
{


row.Cells is always 0 so the foreach is never executed. My data are loaded after the creation of the grid so maybe it's because there is no data on the grid ? The problem is, if I tried to use the following line once the data are loaded:

GridViewHeaderMenu.SetIsEnabled(DataGrid.CurrentGrid as RadGridView, true);

The code use the Loaded event of the GridView, event that already occurs....

Do you have an idea ?

I hope it's clear :)


Thanks !

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Pavel Pavlov
Telerik team
answered on 04 Sep 2009, 01:10 PM
Hi Thomas LEBRUN,

Here is some sample C# code that adds a context menu to the fisrt header cell of the RadGridView
public MainPage()  
        {  
            InitializeComponent();  
            this.RadGridView1.ItemsSource = Person.GetSampleListOfPersons();  
 
            this.RadGridView1.RowLoaded += new EventHandler<RowLoadedEventArgs>(RadGridView1_RowLoaded);  
        }  
 
        void RadGridView1_RowLoaded(object sender, RowLoadedEventArgs e)  
        {  
            GridViewHeaderRow headerRow = e.Row as GridViewHeaderRow;  
 
            if (headerRow != null)  
            {  
                GridViewHeaderCell firstHedaerCell = headerRow.Cells[0] as GridViewHeaderCell;  
                RadContextMenu contextMenu = new RadContextMenu();  
                contextMenu.Items.Add("test context menu item");  
                RadContextMenu.SetContextMenu(firstHedaerCell, contextMenu);  
            }  
        } 

Let me know if you have troubles  adadpting this to your project.

Best wishes,
Pavel Pavlov
the Telerik team

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Thomas LEBRUN
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answered on 04 Sep 2009, 01:35 PM
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William Schultz
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answered on 01 Apr 2010, 10:50 PM
I have copied the same code you have above and set the grid view as :
        <TelerikControls:RadGridView  
            Name="GV1" 
            AutoGenerateColumns="True">  
        </TelerikControls:RadGridView> 
with your code behind:
    public partial class MainPage : UserControl {  
        public MainPage() {  
            InitializeComponent();  
            this.GV1.ItemsSource = InboxIssue.GetInboxIssues();  
 
            this.GV1.RowLoaded += new EventHandler<RowLoadedEventArgs>(GV1_RowLoaded);  
        }  
 
        protected void GV1_RowLoaded (Object sender, RowLoadedEventArgs e)  
        {  
            var headerRow = e.Row as GridViewHeaderRow;  
 
            if (headerRow != null) {  
                var firstHedaerCell = headerRow.Cells[0] as GridViewHeaderCell;  
                RadContextMenu contextMenu = new RadContextMenu();  
                contextMenu.Items.Add("test context menu item");  
                RadContextMenu.SetContextMenu(firstHedaerCell, contextMenu);  
            }     
        }  
    } 
and I get no context menu at all. In the RowLoaded even handler the header row has 1 cell but my data has 14 cols and once run it has a nice gridview with 1 data row and 14 columns with my data.

What am I doing wrong?
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Vlad
Telerik team
answered on 06 Apr 2010, 07:14 AM
Hello,

It will be better if you set the context menu for the entire grid and use the approach demonstrated on this example:
http://demos.telerik.com/silverlight/#GridView/HeaderContextMenu

Best wishes,
Vlad
the Telerik team

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GridView
Asked by
Thomas LEBRUN
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Answers by
Pavel Pavlov
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Thomas LEBRUN
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William Schultz
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Vlad
Telerik team
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