hi
I have a table field named" Colour_HEX" that has colors in HEX code in this format #808080. I tried binding it but getting an invalid cast exception error.

These are my code:

<ItemTemplate>
                <asp:Label ID="Colour_HEXLabel" runat="server" Width="100px" Height="25px" BackColor='<%# Eval("Colour_HEX") %>'></asp:Label>
</ItemTemplate>

Description: An
unhandled exception occurred during the execution of the current web
request. Please review the stack trace for more information about the
error and where it originated in the code.
Exception Details: System.InvalidCastException: Specified cast is not valid.
Source Error: 
 
Line 107: </EditItemTemplate>
Line 108: <ItemTemplate>
Line 109: <asp:Label ID="Colour_HEXLabel" runat="server" Width="100px" Height="25px" BackColor='<%# Eval("Colour_HEX") %>'></asp:Label>
Line 110: </ItemTemplate>
Line 111: </telerik:GridTemplateColumn>

How should I solve this? Many thanks
 
 
 

           

I've spend a lot of time trying to update the Telerik components that we use, however I'm left with one issue.

When I hover over the header of a grid, the column header correctly changes its background color, however the area where the text is does not correctly color with it, at least not until I hover over the text as well (and in that case, the color of the font for the text changes and it still looks wrong).

Basically the idea is that when you hover over any place in one of the header column, the background color of that header changes, but nothing else should change.

Does anyone have any ideas?

Attached is a screenshot of how it currently looks (incorrect) and how it used to look when we were using the 2008 version of Telerik.

Here is my CSS:

Hello Telerik people,

I would like to have about 8 RadListBoxes on a page and be able to drag and drop an item from one list box to any of the other list boxes. The TransferToID property suggests that I can only have one target, is that correct? If it is possible would you please direct me to an example?

Thanks for your help,

Dave

Hi Team,

I am having a radtreeview in content page and a label in master page.
On selection of tree node in content page I want to update the label text. 

Below is the sample code I am using, but some how the update is not happening.

content page aspx is having: rad tree with RadAjaxManagerProxy.
<telerik:RadTreeView ID="xyz" runat="server" OnClientContextMenuItemClicked="xyz"
                        OnClientContextMenuShowing="xyz" OnClientDoubleClick="xyz"
                        OnClientNodeClicked="xyz" OnClientLoad="AddInfoToMenu" Height="440px">
                        <ContextMenus>
                            <telerik:RadTreeViewContextMenu ID="xyz" runat="server">
                            </telerik:RadTreeViewContextMenu>
                        </ContextMenus>
                    </telerik:RadTreeView>

content page cs contains:
 RadAjaxManager manager = RadAjaxManager.GetCurrent(Page);
        manager.ClientEvents.OnRequestStart = "RequestInitiated";
        manager.ClientEvents.OnResponseEnd = "RequestEnded";
        manager.AjaxRequest += new RadAjaxControl.AjaxRequestDelegate(manager_AjaxRequest);

master page update is happening if I am using a button click. but the node click of handled through ajax request is not updating label control.


Any help appreciated.

thanks
Sabitri

hello

Just trialling UI for ASP.NET and wanted to check this is correct (apologies if obvious, first time user of Telerik controls).

I add a datasource to  grid and the columns appear automatically and I can format etc

When I add a DetailTable the columns from the datasource appear when I run in the browser, but if I want to format I need to go into the 'Columns' section and Add Bound columns and add the DataField property for each column

I would have through the columns would appear automatically (Available Columns) for the detail in the same way they appear for the MasterTableView

thanks

Graham

Ok I've been struggling with this all day and have been all over this site and forums and can't crack this one. I think the issue is I do not know the proper syntax for the regular expression but not sure. It is a bool field that is populating a GridBoundColumn. The text that appears in the results is "True" or "False"

So the use case is to auto default my grid to show only records where the Active field equals true. The grid was populating successfully everything was working beautifully up until I tired to add the default filter.

(some irrelevant code has been removed for privacy)


Code behind


error message

Server Error in '/' Application.

No property or field 'Active' exists in type 'DataRowView'

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: Telerik.Web.UI.ParseException: No property or field 'Active' exists in type 'DataRowView'



Additional syntax that has been tried but was also unsuccessful

[Active] = 'true'
[Active] = 'True'
Active = 'true'
Active = True
[Active] EqualTo 'true'
[Active] EqualTo 'True'
[Active] EqualTo true
[Active] EqualTo True

Any help would be great!

~Mike

 

I have a grid where I'm binding data in the needdatasource event, and I'm retrieving a limited selection of records based on the page index. So when they go to the next page, I want to get the next batch of records based on the page size, and when they go back I want to get the previous batch, etc.

The problem I'm seeing is that the NeedDataSource event fires BEFORE the PageIndexChanged event. This means the CurrentPageIndex of the data grid in the NeedDataSource will always be incorrect, since it will always have the old value. I tried testing the RebindReason of the grid to see if I could determine if a page event had caused it, but that always returns ExplicitRebind {4} so it is useless.

How do I figure out what the correct page index is in the NeedDataSource event?

 I am trying to export a telerik gridview to pdf. Although I have managed to do that, I would like to include inside the pdf text like title, or use some values from textboxes inside the aspx page.

I am not sure if the current version of telerik support these actions. Which version of telerik supports these actions and where can I find more information about this if I would like to have this functionality?

What is the code needed for this functionality? so that I can test it with my current version..
Thanks

Hi,

i need the code behind for deleting rows using Telerik gridview. Currently I have the following at the aspx page:
<telerik:GridClientDeleteColumn ConfirmText="Delete row" ButtonType="ImageButton">

what is the method called so that I construct the delete action ? now I am using only the code above - when i delete row disappears but If i do another action I get the error message invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@Page EnableEventValidation="true" %> in a page For security purposes, this feature....

I suspect that the problem is that because I havent inert any code in the code behind file .ascx
which method do I have to implement??

thanks!

Hi,

I am using Radnumericbox like that,

 <telerik:RadNumericTextBox CssClass="app-input" ID="txtUnivaPerfTreshold" runat="server" MaxValue="100" MinValue="1" MaxLength="4" Value="30" EmptyMessage="between %1 - %100" Width="130px" Type="Percent">

When I add EmptyMessage property to radnumerictextbox , on page submit textbox  do auto validation. And red border appears out of textbox. If I dont add empty massage property to radnumerictextbox on page submit textbox is not do autovalidation. I want to use Empty message property but I dont want any validation and red border.

how can I do that?