Questions on UI for ASP.NET AJAX Forum

1 answer

164 views

I'm trying to enable grouping on a grid that is using NeedDataSource to get a LINQ table.

    
                    <asp:ScriptManager ID="ScriptManager1" runat="server">  
        
                    </asp:ScriptManager> 
        
                    <telerik:RadGrid ID="RadGrid1" runat="server"   
        
                        ongroupschanging="RadGrid1_GroupsChanging"   
        
                        onneeddatasource="RadGrid1_NeedDataSource" AllowPaging="true" ShowGroupPanel="true" > 
        
                        <MasterTableView AllowPaging="true" PageSize="100" DataKeyNames="BuildID" > 
        
                        </MasterTableView> 
        
                        <ClientSettings AllowDragToGroup="true" /> 
        
                    </telerik:RadGrid>

    
                 protected void RadGrid1_GroupsChanging(object source, Telerik.Web.UI.GridGroupsChangingEventArgs e)  
        
                    {  
        
                    }  
        
                    protected void RadGrid1_NeedDataSource(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e)  
        
                    {  
        
                        RadGrid1.DataSource = new DataClasses1DataContext().DataTable;  
        
                    }

When they drag a header to be grouped, GroupsChanging and NeedDataSource both fire. During GroupsChanging, if I get RadGrid1.MasterTableView.GroupExpressions, as expected the group has not been added.

However, during NeedDataSource, the group has not been added to RadGrid1.MasterTableView.GroupExpressions.

When they drag a header to be ungrouped, both events fire again. During GroupsChanging, the group has not been removed, as expected.

During NeedDataSource it has been removed.

So when you're grouping, NeedDataSource does not have the correct grouping information, and when you're ungrouping, it does.

The "DataTable" has about 30 columns and 12,000 rows.
The version on my Telerik.Web.UI is 2008.2.826.35, and the Runtime Version is v2.0.50727.

The reason I need grouping info during NeedDataSource is because I'm trying to keep Custom Paging after they group headers by doing my own sorting on the LINQ table.

Thanks,
John

Grid

answered on 13 Apr 2009

3 answers

122 views

Problem in Upgrading from Trial Version to RadControls for ASP.NET AJAX

I was using the trial version of Telerik and its Rad controls in my web site. It was working fine with Rad charts.
I was using 4 files in my bin folder for RadChart.

1. Telerik.Charting.dll

2. Telerik.Charting.xml

3. Telerik.Web.UI.dll

4. Telerik.Web.UI.XML

and it was working fine. I was using Telerik.Charting.ChartSeriesItem and it was working fine with the 4 dll's.

Now I have installed RadControls for ASP.NET AJAX er developer version in my machine. I am using MS VS2005 and .net 2.0. After installation in this version I get a bin folder with 3 files

1. Telerik.Web.Design.dll

2. Telerik.Web.UI.dll

    3. Telerik.Web.UI.XML
Now I deleted my previous 4 files from my bin folder and replaced that with the latest 3 files found in the bin folder of my computer C:\Program Files\Telerik\RadControls for ASPNET AJAX Q1 2009\Bin folder

After that I am unable to Run my site. The Error says :
Server Error in '/Chart' Application.
--------------------------------------------------------------------------------
Object reference not set to an instance of an object.
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.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
   Telerik.Charting.ChartSeriesItem.SaveViewState() +63
   Telerik.Charting.StateManagedObject.Telerik.Charting.IChartingStateManager.SaveViewState() +4
   Telerik.Charting.ChartingStateManagedCollection`1.SaveViewState() +88
   Telerik.Charting.ChartingStateManagedCollection`1.Telerik.Charting.IChartingStateManager.SaveViewState() +7
   Telerik.Charting.ChartSeries.SaveViewState() +68
   Telerik.Charting.StateManagedObject.Telerik.Charting.IChartingStateManager.SaveViewState() +4
   Telerik.Charting.ChartingStateManagedCollection`1.SaveViewState() +88
   Telerik.Charting.ChartingStateManagedCollection`1.Telerik.Charting.IChartingStateManager.SaveViewState() +7
   Telerik.Charting.Chart.SaveViewState() +168
   Telerik.Charting.StateManagedObject.Telerik.Charting.IChartingStateManager.SaveViewState() +4
   Telerik.Web.UI.RadChart.SaveViewState() +56
   System.Web.UI.Control.SaveViewStateRecursive() +59
   System.Web.UI.Control.SaveViewStateRecursive() +156
   System.Web.UI.Control.SaveViewStateRecursive() +156
   System.Web.UI.Control.SaveViewStateRecursive() +156
   System.Web.UI.Page.SaveAllState() +466
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2357

Please help me.

Chart (Obsolete)

answered on 13 Apr 2009

1 answer

50 views

Icons of rad controls in toolbox have all changed and controls can't be dragged onto page

Hi,

Before I start, I would like to say that Telerik RAD Controls are awesome. I have purchased one of your controls (tabstrip), and intend on buying licenses for rad controls ajax and openaccess orm.

Anyway, I have an ASP.NET 3.5 web application (I have checked propertieS) which is just for experiments etc. I went to design view and then my toolbox and noticed that the icons for each RAD control and also some standard ASP.NET controls (I think those only released in .NET 3.5) have a different icon (but same for all the effected controls).

I have a screenshot where you can see what I mean:

http://img26.imageshack.us/img26/8276/vstudiobug.png

Now I know this is perhaps a .NET issue because standard .NET controls have been effected, and I have posted on ASP.NET (awaiting reply) but I ask on here too as perhaps Telerik is causing the problem (maybe it's .NET, or maybe it's Telerik). There is no associated warning or error with this problem.

Does anyone here know what the problem is?

General Discussions

answered on 13 Apr 2009

1 answer

97 views

Adding custom colours

Is there a way I can add my own hex code when changing the colour of text, an option I need to tun on in the ToolsFile.xml maybe?

Editor

answered on 13 Apr 2009

1 answer

116 views

store radEditor content's html markup

Hello,

I have content created something like below(HTML markup is shown):

Hi 

I want to store it in database like:
<html>
<body>
Hi 
</body>
</html>

I know I can manipulate string at time of storing but is there any way to store content as seen in HTML mode and
user changing body tag.
I want to do this because my users may like to change body tag e.g. <body onload="..." ...>....</body>

Regards,
Jay

Editor

answered on 13 Apr 2009

1 answer

35 views

Media manager boolean properties not showing

Hey all. I'm having a problem with the media/flash manager properties on the RadEditor. In IE7-8, if you select a boolean property (such as ShowStatusBar or AutoPlay), the Yes/No radio buttons don't appear and a JS error is thrown. The radio buttons show just fine in FF. I'm using the latest version, Q1 2009. This problem is even present on the RadEditor demos.

Any ideas?

Thanks,
Andrew

Editor

answered on 13 Apr 2009

1 answer

153 views

Performance issues with large charts.

I'm making a (speed/time) line chart that has to support a very large number of items (1 item per second, 3600 items for a one hour view). The chart is taking 10 seconds to render, which is unacceptable for our application.

I've tried to enable scrolling on the X axis and only render part of the chart, but it takes the same amount of time (10+ seconds) to update when scrolling.

I've also tried disabling the view state, which made the HTML go from 2MB to 7KB, but it still takes 10 seconds to render.

Is there some way to filter the items? For instance, the chart does not need to draw all 3600 items for a 500px wide chart. Can I filter the items before I populate the chart? How will zooming and scrolling work?

Using Q1 2009.

    
            <form id="Form1" runat="server"> 
        
            <asp:ScriptManager ID="ScriptManager1" runat="server"> 
        
            </asp:ScriptManager> 
        
            <asp:UpdatePanel ID="UpdatePanel1" UpdateMode="Conditional" runat="server"> 
        
                <ContentTemplate> 
        
                    <telerik:RadChart ID="RadChart1" runat="server" AutoLayout="true"> 
        
                        <ClientSettings EnableZoom="false" ScrollMode="XOnly" XScale="50" /> 
        
                        <Series> 
        
                            <telerik:ChartSeries DataYColumn="Speed" Type="Line"> 
        
                                <Appearance> 
        
                                    <LabelAppearance Visible="false"> 
        
                                    </LabelAppearance> 
        
                                </Appearance> 
        
                            </telerik:ChartSeries> 
        
                        </Series> 
        
                        <Legend Visible="false"></Legend> 
        
                        <ChartTitle TextBlock-Text="Title"> 
        
                        </ChartTitle> 
        
                    </telerik:RadChart> 
        
                </ContentTemplate> 
        
            </asp:UpdatePanel> 
        
            </form>

    
             protected void Page_Load(object sender, EventArgs e) 
        
                { 
        
                    if (!IsPostBack) 
        
                    { 
        
                        DataTable dt = new DataTable(); 
        
                        dt.Columns.Add("speed", typeof(int)); 
        
                        Random random = new Random(); 
        
                        for (int i = 0; i < 3600; i++) 
        
                        { 
        
                            DataRow row = dt.NewRow(); 
        
                            row[0] = random.Next(100); 
        
                            dt.Rows.Add(row); 
        
                        } 
        
                        RadChart1.DataSource = dt; 
        
                        RadChart1.DataBind(); 
        
                    } 
        
                }

Chart (Obsolete)

answered on 13 Apr 2009

2 answers

110 views

Build RadTreeView Designer Option

I'm using the designer option for the RadTreeView, while in split mode. As I change the nodes and click OK, nothing happens in the markup. Although the nodes are there, it never writes the content. But it does retain them, until I close the window. Then no nodes are written...

Has anyone else experienced this?

TreeView

answered on 13 Apr 2009

1 answer

464 views

Telerik menu options greyed out

I've installed the Telerik VS extensions successfully. I have an existing application that is already using Telerik controls extensively.

When I look under the new Telerik menu in VS, the only option that is enabled is "Convert To Telerik Web Application". I've used this option even though we already had all the necessary configurations in web.config.

All the other options in the menu (Add RadControls Template, Add RadGrid Template, etc) are disabled, even when my open document is an aspx page in design view. What am I missing?

Thanks.

Installer and VS Extensions

answered on 13 Apr 2009

3 answers

158 views

Focus event in Firefox

We are using multiple RadEditor controls on a single page. We need to add an event handler to the focus event for each editor. This code is working fine in Internet Explorer, but it is not working in Firefox.

Here is the code:

var OnTelerikClientLoad = function(editor, args) {

var element = document.all ? editor.get_document().body : editor.get_document();

$telerik.addExternalHandler(element, "focus", function(e) {

alert("focus!");

});

$telerik.addExternalHandler(element, "blur", function(e) {

alert("blur!");

});

}

Neither the focus or blue alerts are firing.

Any suggestions?

Editor