Questions on UI for ASP.NET AJAX Forum

4 answers

224 views

[Solved] 500 error when using custom template

Hello,

I'm getting the following javascript Ajax related error when I set up a custom iTemplate instead of using the Telerik GridTemplateColumn. The error shows up when I click on the custom link I create instead of using the aspx GridTemplateColumn's link.

Sys.WebForms.PageRequestManagerServerErrorException: Object reference not set to an instance of an object.

The error details say it is a 500 error.

If I use the GridTemplateColumn shown below, it works fine.

    
            <Columns> 
        
                 <telerik:GridTemplateColumn UniqueName="Delete" AllowFiltering='false'> 
        
                      <HeaderStyle Width="45px" /> 
        
                      <ItemStyle CssClass="c" /> 
        
                      <ItemTemplate> 
        
                           <asp:HyperLink ID="DeleteLink" runat="server" Text="Delete" /> 
        
                      </ItemTemplate> 
        
                 </telerik:GridTemplateColumn> 
        
            </Columns>

But when I convert it to an iTemplate using the following code, I receive the error.

    
            Dim type As String = "Delete" 
        
            Dim column As New GridTemplateColumn 
        
            column.AllowFiltering = False 
        
            column.HeaderStyle.Width = 45 
        
            column.ItemStyle.CssClass = "c" 
        
            column.ItemTemplate = New HyperlinkTemplate(type) 
        
            column.UniqueName = type 
        
            RadGrid1.MasterTableView.Columns.Add(column)

My HyperlinkTemplate is the following class.

    
            Public Class HyperlinkTemplate 
        
                Implements ITemplate 
        
                Private _type As Object 
        
                Public Sub New(ByVal type As String) 
        
                    MyBase.New() 
        
                    _type = type 
        
                End Sub 
        
                Public Sub InstantiateIn(ByVal container As Control) Implements ITemplate.InstantiateIn 
        
                    Dim hl As New HyperLink 
        
                    hl.EnableViewState = False 
        
                    hl.ID = _type & "Link" 
        
                    hl.Text = _type 
        
                    hl.Attributes("href") = "#" 
        
                    container.Controls.Add(hl) 
        
                End Sub 
        
            End Class

I have an OnItemCreated event that runs the following code which adds an onclick event which I will show next and customizes the ID to make it unique:

    
            Dim deleteLink As HyperLink = DirectCast(e.Item.FindControl("DeleteLink"), HyperLink) 
        
            deleteLink.Attributes("onclick") = [String].Format("return Delete('{0}');", e.Item.OwnerTableView.DataKeyValues(e.Item.ItemIndex)(IDcolumnIsHere)) 
        
            deleteLink.ID &= e.Item.ItemIndex

The onclick code calls the RadAjaxManager I have set up.

    
            function Delete(id) { $find("<%= RadAjaxManager1.ClientID %>").ajaxRequest("Grid,Delete," + customValue + "," + id); }

The custom column is added during the Page_Load event.

It never reaches the Ajax Handler I have set up unless I use the aspx GridTemplateColumn instead of my custom template.

Am I doing something wrong with the iTemplate or am I not initializing something I should be that integrates it with the RadGrid? I've tried going through the various properties available to me for the column and the iTemplate, but I haven't had any luck making the error go away so I know I'm missing something... just not sure what.

Grid

answered on 08 Oct 2009

6 answers

826 views

DataFormatString in edit mode

Hi,

I am initially loading the grid in edit mode - and when doing that, RadGrid seems to ignore the value for the DataFormatString property of my GridBoundColumn
It works if I do not load the grid in edit mode.

How can I make it work when loading in edit mode?

Grid

answered on 08 Oct 2009

2 answers

200 views

How To Select First Row of Detail Grid in Master/Detail Grid on PreRender?

I’m having a problem with the selection of rows in a Master/Detail Grid.

Scenario: I have a page with two grids that are connected via a Master/Detail relationship. It is similar to http://demos.telerik.com/aspnet-ajax/grid/examples/programming/selectedvalue/defaultcs.aspx, except I have two grids instead of three and my page’s pre-render event codebehind looks like:

    
            Protected Sub Page_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreRender  
        
                        If RadGrid1.SelectedIndexes.Count = 0 Then 
        
                            RadGrid1.SelectedIndexes.Add(0)  
        
                        End If 
        
                    End Sub

When the page loads for the first time, the first row in the Master grid is selected, but not the first row in the Detail grid.

I wanted to know how to select the first row in the Detail Grid of a Master/Detail Grid on the first load of the page if the Detail grid has any rows related to that particular Master grid item at Index(0).

Grid

answered on 08 Oct 2009

4 answers

385 views

Javascript Permission Denied error in telerik.web.ui.webresource.axd file

Hi
I got permission denied error and some more script errors in telerik.web.ui.webresource.axd file for the first time i request the page from the IIS server. Once I refresh the page, it works fine without any script error. This error doesnot happen if I run the code locally from my system. This error doesnot occur if I use automatically detect setting in LAN settings. But the error happens if check proxy server for lan and add the ip of the site to advanced settings (donot use proxy option).
Please provide the solution and reason for this.
regards
Bharath

Ajax

answered on 08 Oct 2009

2 answers

192 views

Nested Controls in Databound RadPanel

Hello, I'm having a bit of trouble trying to put nested controls in a databound RadPanel. What I want is basically the same as this example:

http://www.telerik.com/help/aspnet-ajax/panel_templatesoverview.html

However, the problem is that I do not know how many items I'm going to have until run time.

If I have

    
            <telerik:RadPanelBar ID="RadPanelBar1" runat="server" ItemCreated="RadPanelBar1_ItemCreated">  
        
                <ItemTemplate>            
        
                  <asp:TextBox ID="txtResponse" TextMode="MultiLine" runat="server" /><br /> 
        
                  <asp:Button ID="btnSubmit" runat="server" Text="Submit" Visible="true" /> 
        
                  <asp:LinkButton ID="lbAsk" runat="server" Visible="true" /> 
        
                  <asp:LinkButton ID="lbNewEvisit" runat="server" Visible="true" /> 
        
                            </ItemTemplate>                 
        
            </telerik:RadPanelBar>

and my codebehind looks like

    
            protected void RadPanelBar1_ItemCreated(object sender, RadPanelBarEventArgs e)  
        
            {  
        
                  if (e.Item.Owner is RadPanelBar)  
        
                  {  
        
                       RadPanelItem i = new RadPanelItem();  
        
                       e.Item.Items.Add(i);  
        
                  }  
        
            }  
        
            /* Page Load Event and other stuff */ 
        
            RadPanelBar1.DataSource = ds.Tables[0];  
        
            RadPanelBar1.DataTextField = "dtEvisitStart";  
        
            RadPanelBar1.DataBind();

What happens is that the item template is created correctly for each item, with each item heading correct, however there's a duplicate set of controls attached to each item as seen on the attached image (each date should only have one set of controls).
I see similar behavior in static code if I remove the empty ItemTemplate place holder, but I can't seem to correct the problem for the dynamically bound panel. Any help greatly appreciated! Thank you.

PanelBar

answered on 08 Oct 2009

1 answer

118 views

[Solved] How to disable upload and delete function for template manager?

Hi,

I am using a template manager and only want the user to select from existing templates.

How do i disable the upload and delete button in the template manager?

Thanks,
Phi

Editor

answered on 08 Oct 2009

5 answers

573 views

Changing the message "Type the code from the image"

Is there a way to change / localize the message "Type the code from the image"?

Captcha

answered on 08 Oct 2009

5 answers

233 views

Access RadTreeView parent Control

Hi,

In my implementation i have inserted a RadTreeview control inside RadCombobox which inturn is placed inside the RadGrid.
For one of my requirements i want that when user click on any node i want to attain handle of RadComboBox and do some operations on it.
But i am unable to find the parent conrol of Radtreeview.

Any ideas on how can this be done?

Regards,
Amit

ComboBox

answered on 08 Oct 2009

1 answer

294 views

Rad Menu Item with ItemTemplate Programatically

Hello Sir,

I am currently using telerik RadMenu in my project. In my project i want to create menu dynamically, and also i need templates for child items created dynamically.. i have gone through your forums.. and found out how to create menu dynamically as well as how to add templates dynamically.. but my requirement is that i need a menu item created dynamically along with its child items created dynamically using templates. And this template, contains DataList and other controls.... how can i do this...i need the child item loaded in a template format just as shown in the design mode in ur examples.........

Please help...

regards,
jeby.

Menu

answered on 08 Oct 2009

3 answers

149 views

scheduler timelineview datepicker not visible fully

Hi
In my rad schheduler i have enabledatepicker="true".But
In timelineview there is no records for current month the height of the scheduler is samll.At the time if i click the datepicker its not visible fully because the height of the scheduler is less than datepicker.

see this demo link change the numberofslot="1" in the above dropdown. and click the datepicker you can see the bottom of the datepicker not visible.
http://demos.telerik.com/aspnet-ajax/scheduler/examples/timelineview/defaultcs.aspx.

I want the datepicker visible fully

Regards
Vairamuthu

Scheduler

answered on 08 Oct 2009