Questions on UI for ASP.NET AJAX Forum

2 answers

150 views

Error in web app

I have simple page in Net 4.0 and getting below error and below you will the code as well

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.Web.UI.PreControlToAjaxify.Render(HtmlTextWriter writer) +113
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +245
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +245
   System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +306
   System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) +47
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +245
   System.Web.UI.Page.Render(HtmlTextWriter writer) +39
   Telerik.Web.UI.RadAjaxControl.RenderPageInAjaxMode(HtmlTextWriter writer, Control page) +666
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +130
   System.Web.UI.Page.Render(HtmlTextWriter writer) +39
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +4942

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1

Code:
Default.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<%@ Register Src="WebUserControl.ascx" TagName="WebUserControl" TagPrefix="uc1" %>
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

</form>
</body>
</html>

Default.aspx.cs:

using System;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

}
}

WebUSerControl.acsx:

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="WebUserControl.ascx.cs" Inherits="WebUserControl" %>
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
<telerik:RadAjaxManagerProxy ID="AjaxManagerProxy1" runat="server">
    <AjaxSettings>
    <telerik:AjaxSetting AjaxControlID="OrdersGrid">
            <UpdatedControls>
                <telerik:AjaxUpdatedControl ControlID="OrdersGrid" />
            </UpdatedControls>
        </telerik:AjaxSetting>
        <telerik:AjaxSetting AjaxControlID="EmployeesGrid">
            <UpdatedControls>
                <telerik:AjaxUpdatedControl ControlID="RadTabStrip1" />
                <telerik:AjaxUpdatedControl ControlID="RadMultiPage1" LoadingPanelID="RadAjaxLoadingPanel1" />
                <telerik:AjaxUpdatedControl ControlID="EmployeesGrid" />
            </UpdatedControls>
        </telerik:AjaxSetting>

    </AjaxSettings>

</telerik:RadAjaxManagerProxy>

<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" />
<telerik:RadGrid ID="EmployeesGrid" runat="server" AutoGenerateColumns="true"
    AllowSorting="True" AllowMultiRowSelection="False" AllowPaging="True" PageSize="5"
    GridLines="None" ShowStatusBar="true" style="margin-bottom: 20px;">
    <PagerStyle Mode="NumericPages"></PagerStyle>

<telerik:RadTabStrip runat="server" ID="RadTabStrip1" MultiPageID="RadMultiPage1"
    SelectedIndex="0">
    <Tabs>
        <telerik:RadTab runat="server" Text="Sanjay" PageViewID="PageView1" />
        <telerik:RadTab runat="server" Text="Sanjay" PageViewID="PageView2" />
    </Tabs>
</telerik:RadTabStrip>
<telerik:RadMultiPage runat="server" ID="RadMultiPage1" SelectedIndex="0" RenderSelectedPageOnly="false">
    <telerik:RadPageView runat="server" ID="PageView1">
    <telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="true"
    AllowSorting="True" AllowMultiRowSelection="False" AllowPaging="True" PageSize="5"
    GridLines="None" ShowStatusBar="true" style="margin-bottom: 20px;">
    <PagerStyle Mode="NumericPages"></PagerStyle>

WebUserControl.acxs.cs:

using System;
using System.Data;

public partial class WebUserControl : System.Web.UI.UserControl
{
    protected void Page_Load(object sender, EventArgs e)
    {
        DataTable dt = new DataTable();

dt.Columns.Add(new DataColumn("Contract Number", typeof(string)));

dt.Columns.Add(new DataColumn("Customer Name", typeof(string)));

DataRow dr = dt.NewRow();

dr["Customer Name"] = "Sanjay";
dr["Contract Number"] = "Sanjay";

dt.Rows.Add(dr);

        EmployeesGrid.DataSource = dt;
        EmployeesGrid.DataBind();

}
}

Grid

answered on 02 May 2011

2 answers

87 views

Radwindow and LoadOnDemand

is there is anyway to make the radwindows just load on demand like radtooltip?
i mean load on demand an ascx control in the ContentTemplate

Window

answered on 02 May 2011

1 answer

85 views

ToolTip not working in IE7

Hi,

The tooltip doesn't work in IE7 version. It works fine in IE8/9 and other browsers. could you please help me in finding out why it isn't. I see that Radtooltip is browser compatible and should work well across all the browsers, but am not able to figure out why this is happening with my code.

I would greatly appreciate your help on this. Already spent hours on debugging this issue.

Thanks.

ToolTip

answered on 02 May 2011

1 answer

234 views

RadUpload returning UploadedFiles.Count zero (0) value always

Hi,

I am using the RadUpload control and facing problems with that.

Whenever I submit the page

UploadedFiles.Count

Always returns the 0, I am using it in a very simple page with just the Upload control and the asp Button to submit.

I want to clerify that I am not using any ajax functionality, it is just a simple page.

Anyone knows about this problem??

I have attatched my project, Please suggest something.

Upload (Obsolete)

answered on 02 May 2011

5 answers

71 views

Style RadWindow from Grid

Hi,

Following this demo - I can't get the window to style as I wish (with a skin or a size). The demo itself uses a default setting.
Is it possible please?

Cheers,

Jon

Window

answered on 02 May 2011

4 answers

122 views

CSS Sprites

Hi, I've been trying to find documentations to switch to css sprites for my navigation menu. I have too many http requests which is slowing down my site. I currently have 4 navigation tabs with hover and active links. I've sliced each tabs and am having a hard time figuring out how to incorporate the css sprites with the telerik. Can someone please help me? I'm very new to Telerik.

Thanks,
Karly

Menu

answered on 02 May 2011

3 answers

145 views

web.config

hi

I use Telerik.Web.UI.dll v2011.1.419.40

and my web host use windows server 2003 + IIS6

and I use RadScriptManager + RadChart in my web site

what is correct form of my web.config?

<?xml version="1.0"?>

<configuration>

<system.web>

<machineKey validationKey=

"4E034E7E4D3A8BD7B883864A59A1DCE0F0830BBB7A8EA155F5E3C43640F53EE78D1FD427F4C7A1FC88C273BD134A4A55F329EB552379EE45E74C5FA298CD270F"

decryptionKey="6D0118305061DE29C50CC073F906B4861CEE55D1CB1EBBE31D04220359C6794C" validation="SHA1" decryption="AES" />

<compilation debug="false" defaultLanguage="C#" targetFramework="4.0">

<assemblies>

<add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A"/>

<add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>

<add assembly="System.Speech, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>

</assemblies>

</compilation>

<httpRuntime maxRequestLength="1024" requestLengthDiskThreshold="64" requestValidationMode="2.0"/>

<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID">

<controls>

<add tagPrefix="csm" namespace="customWebControls"/>

<add tagPrefix="tlk" namespace="Telerik.Web.UI" assembly="Telerik.Web.UI"/>

</controls>

</pages>

<httpModules>

<add name="customErrorModule" type="customErrorModule"/>

</httpModules>

<httpHandlers>

</httpHandlers>

</system.web>

<system.webServer>

<validation validateIntegratedModeConfiguration="false"/>

<modules>

<add name="customErrorModule" type="customErrorModule"/>

</modules>

<handlers>

</handlers>

</system.webServer>

</configuration>

General Discussions

answered on 02 May 2011

3 answers

178 views

ExtractValuesFromItem() only works for RadGrid after fresh page load

Well.

Please notice the bold, italicized line in the function below. It works fine (retrieves NEW, user-modified values from the RadGrid) after a fresh load of the page, but after a postback of the page, it retrieves the OLD values from the RadGrid.

Is there any Telerik-related reason this would happen? I really have no idea why the postback page works differently than the original page load.

private static void CaptureChangesInGrid(RadGrid targetGrid)

{

//Loop through each targetgrid item

foreach (GridDataItem gridRow in targetGrid.MasterTableView.Items)

{

Dictionary<object, object> editDict = new Dictionary<object, object>();

targetGrid.MasterTableView.ExtractValuesFromItem(editDict, (gridRow as GridEditableItem));

foreach (GridColumn column in targetGrid.MasterTableView.Columns)

{

CustomEditableColumn editableCol = column as CustomEditableColumn;

GridEditableColumn editColumn = editableCol as GridEditableColumn;

if (editableCol != null)

{

//Find the edit control in the given row

System.Web.UI.Control editItem = editableCol.FindControlInRow(gridRow);

if (editItem == null)

{

throw new ApplicationException("Unable to find edit control in for column: " + editableCol.HeaderText);

}

editableCol.CheckControlForChange(editItem, GetValueFromDictionary(editableCol, editDict));

}

Does anyone have a better way of retrieving user-entered values on a RadGrid which works after successive postbacks to the page? Or is there a way to fix this?

EnableViewState is enabled for the page.

The data entered is required for modifying the appearance of the page (highlighting for errors in entries, etc.) and thus I cannot have a fresh load performed every time. An undesirable option might be to place any user-edited data into the viewstate and perform a full refresh of the page and replace old data with the saved viewstate data... but that sounds like a lot of additional code for which I really don't have the time to create.

I'll be here all day, talk to me!

Thanks,
Jon

Grid

answered on 02 May 2011

1 answer

147 views

To Add Blank spaces in the Listbox text value

Hi;
We are using RADLIST box we have an unusal requirement after everyword inside the listbox there has to be some white spaces in betwwen the word for example "Hello World".
but when I give this inside the listbox the spaces get truncated to "Hello World".
Can you please tell me that how can I acihve this functionality as it is very urgent for me.
please let me know ASAP.

General Discussions

answered on 02 May 2011

1 answer

66 views

cursor size

Hi,

Is it possible to make the cursor inside the editor to look bigger? if i change the fonts inside the editor will it be ok?

I am asking because it's for some one with eye problems.

Regards,
Eleni

Editor

answered on 02 May 2011