Post New Web Links

Cannot access Label inside Repeater - "Object reference not set..."

Posted By: Posted Date: August 27, 2010 Points: 0 Category :ASP.Net

I have a button on a page with a Repeater and an ObjectDataSource. To give credit where credit is due, the Repeater's paging functionality is courtesy of ScottGu. (However, I'm using ASP.NET 4.0 and SQL Server 2008, as opposed to ASP.NET 2.0 and SQL Server 2005.)

Anyway, in the button's click event, I need to access the Text property of a Label that's inside the Repeater because it's used as an input parameter in a stored procedure. I'm getting a NullReferenceException when trying to access the Label's Text property. I have researched this error and have tried a few different solutions (involving FindControl and the Repeater's ItemDataBound event), but I haven't been able to get it to work. Any suggestions, in VB or C#, would be greatly appreciated. The code is below.

somepage.aspx

<asp:Repeater ID="rptText" runat="server" DataSourceID="tbsDataSource">
        <HeaderTemplate>
            <table width="100%" cellspacing="1">            
        </HeaderTemplate>
        <ItemTemplate>
	    <%-- some rows removed for brevity --%>
            <tr>
                <td><asp:Label 
 

                                     
                                            
                                        

View Complete Post

More Related Resource Links

Strange Repeater Error, Object reference not set, Label not visible etc etc..

Hi Everyone,This is very strange and as of yet I cant seem to get round it, although it is a somewhat easy error to identify it is however becoming very annoying as everything I try doesn't seem to work...The repeater displays results for upcoming subscribers birthdays and after their day and month ("dd/mm/") I have a label to display the current year. This causes the old error of: 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: Line 55: Label lblYear = e.Item.FindControl("lblYear") as Label;Line 56: Line 57: lblYear.Text = DateTime.Now.Year.ToString();Line 58: }Line 59: As you can see the object is set correctly - The ASPX is below, for saving time on reading etc I've posted the repeater script only and not the whole page, although I can do if needs be.I've tried a number of things with subtle differences but to no avail: with Literal, same error - Tried inserting the year directly via <%#((system.datetime).now.year.tostring())%> or something to that effect, this also doesnt

LinkButton inside Repeater

Hi.

I have Repeater, which consists of LinkButon and Literal.ÃÂ LinkButon and Literal are whole thing by implication. I want get value from Literal, when user click onÃÂ corresponding LinkButton.

TIAÃÂ

unable to access control inside webuser control

I have used calender web user control inside my project where i took textbox,button and calender.....but after dragging onto my aspx page....i am unable to access this textbox,calender and button on aspx page...Pls help me to find out the solution.

Repeater issue, all code inside Repeater are not shown

I have a Repeater who should show some data from my ms.sql server. But all code inside the Repater is not shown on my .aspx page. What am i doing wrong. I have a similar Repeater on another page and there it works fine.

 <div class="AnsaettelseKontrakt Folders">
      	            <table cellpadding="0" cellspacing="0" width="750px" align="right">
                        <tr>
                            <th class="BrugerHeader" style="width:300px;">Filnavn</th>
                            <th class="BrugerHeader" style="width:80px;">StÃÂ¸rrelse</th>
                            <th class="BrugerHeader" style="width:150px;">Dato</th>
                            <th class="BrugerHeader" style="width:180px;" colspan="2">Brugere</th>
                            <th class="BrugerHeader" style="width:40px;">VÃÂ¦rktÃÂ¸jer</th>
                        </tr>
                        <asp:Repeater ID="RepeaterAns" runat="server" onitemcommand="Repeater1_ItemCommand" >
                            <ItemTemplate>
                                <tr class="Br

XML Repeater Inside Conditional Statement

Hi all,

I'm working on an VB.Net application which have 2 nasted repeaters using xml as data source. I need to add a conditional statement withen the first repeater ItemTemplate as follows:

<ItemTemplate>
	<%# IIf(XPath("@type")= 3 , "<html>", "<div id=""tblPages"" runat=""server""><divsub""><h2>"   &  XPath("@title") &  "</h2><ul class="sublinks"><asp:repeater id=""rpPages"" DataSource=""XPathSelect("@page")"" runat=""server""><ItemTemplate><li></li></ItemTemplate></asp:Repeater></ul></div></div>" ) %>
</ItemTemplate>

The problem come when I try to add the

DataSource='<%# XPathSelect("page") %>'

so I get an error.

Does anyone have idea if the above code may work?

thank you
Hany

label inside table inside div won't show

I have a label inside a table cell that is coded to change backcolor conditionally. The table is inside a div tag. The label doesn't appear at runtime. Has anyone experienced this before? Is there a workaround? Thanks.

Get value of a label control inside the DetailsView

Hi everyone, I have a databound label control (i.e. Label 3) inside an Item Template that's in a DetailsView control. I just need to get the value of those label and compare it to some string. I tried several ways (i.e. Find control, DetailsView.Row) but nothing seems to work. I don't know if I'm using the FindControl methos correctly or if I need to access the Row first and do the findcontrol method. Protected Sub DetailsView4_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles DetailsView4.DataBound 'If (DetailsView4.Rows(2).Cells(1).ToString = "Regular") Then 'Label3.ForeColor = Drawing.Color.Azure 'End If 'Dim StatusQualifierContainer As Label 'Dim S As String 'StatusQualifierContainer = DetailsView4.FindControl(Label3.Text) 'S = StatusQualifierContainer.Text 'If S = "Regular" Then 'Label5.ForeColor = Drawing.Color.Aqua 'End If 'Dim C As Label = DetailsView4.FindControl("Label3") 'If C.Text = "Regular" Then 'Label3.ForeColor = Drawing.Color.DarkBlue 'End If 'Dim headerRow As DetailsViewRow = DetailsView4.HeaderRow 'Dim lblText As Label = CType(headerRow.FindControl("Label3"), Label)

Access Model Validation inside Custom Model Binder.

Hello,Is it possible, inside a Custom Model Binder, to fire "something" that "says" the value is invalid so it gets handled by validation part?Basically, I am getting an exception when the value for the property is invalid.Thank You,Miguel

I need to be able to disable a button inside a repeater control when an item in the data is <1

For example, I have an inventory table. If any one of the items is less then one, I need to disable the button. <asp:Repeater id="repeater1" <ItemTemplate> <asp:Button id=btnSize /> </ItemTemplate> </asp:Repeater>

how to access items inside Sharepoint List Folder

hi all i have a list with structure as below QuckList(List) A(Folder) 1(List Items) 2(List Items) B(Folder) 1(List Items) i have to display the List items inside the folder in drop down i am able to access the folder as Splistitem, but not able to access the items inside the folder any ideas how to access the items inside the List Folder ragava_28


Categories:

ASP.Net	Windows Application	.NET Framework	C#	VB.Net	ADO.Net
Sql Server	SharePoint	Silverlight	Others	All