.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

Problems With Formview.DataItemCount

Posted By:      Posted Date: September 25, 2010    Points: 0   Category :ASP.Net

Hello forum,

I have a formview, Fv, and a label, lbl.  I am trying to count the number of records in fv, in the Load_Complete event,  and place the number in lbl.  However, I keep getting "0" as my count, whether there's a record or not.  Where am I going wrong?  Here's my code behind:

Protected Sub Page_LoadComplete(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.LoadComplete

        lbl.Text = fv.DataItemCount
    End Sub


View Complete Post

More Related Resource Links

FormView Postback Problems


I'm trying to use a FormView control (ASP.NET 4.0) to display/edit an Entity from an EF 4.0 query.

I can successfully set my entity as the DataSource of the FormView control, and it displays properly.

The problem is that as soon as I have any postback on the page, the FormView reverts to the Empty Data message templates contents. When I look at the state of the control via the debugger, I see that it still says it has a DataItemCount of 1 and has the correct data key value. It simply decides to show the empty data message instead of showing my item template.

Aside from using a single entity (as apposed to a collection of entities) as my data source, the only other funky thing I'm doing is that the FormView lives inside an ajax panel. (And so does the control causing the postback.)


Top .NET Performance Problems and how to avoid them

Every time I work with one of our .NET customers to help them with managing their application performance I come across the same problems as seen with other clients before: lots of ADO.NET queries, many hidden exceptions in core or 3rd party .NET libraries, slow 3rd party components, inefficient custom code

Formview LinqData source not allowing updates


OK, I'm confused.  I've set up a formview with a Linqdata source to allow users to edit records.  When I run it, edit data and submit, it blows up and tells me "Linq datasource6  does not support the Select property when the Delete, Insert or Update operations are enabled."  I googled that warning and saw a couple of posts on this forum saying the problem is the slect statement has to be removed from the Linq data source for it to allow updates. 

But if I remove the select statement then how do I show the user specific info on pageload?   plus I thought the two way databind was an advantge of the datasource control.




Visual Studio 2008 Memory problems


My memory in task manager reaches about 900,000K  and I don't know why it does this. Definately slows everything down, especially when I rebuild my tableAdapters, takes about 30 seconds sometimes to rebuild the project.

Problems with Forms Authentication in DD 4 site


Hello,  I am seeing a strange problem with Forms Authentication in my DD site.   A user logs into and can view/edit/delete data all day, but when they execute a Custom Filter against data (for example , a control DynamicData/Filters/CustomerLastNameSearch.ascx ) then the site auth fails, and redirects to the log in screen.

in web.config I have

     <authentication mode="Forms">
            <forms name=".Star" loginUrl="~/Login.aspx" protection="All" defaultUrl="~/Default.aspx" path="/" timeout="43200" cookieless="UseCookies" />     

Offhand, I am thinking two things : that DynamicData/Filters path requires some special handling for some reason, or the control extension ascx is causing auth to get confused.   Has anyone else experienced this or have any suggestions?  Thanks!

FormView -- Parameters and asp:Table


I've already solved this problem to my satisfaction, I just want to know WHY it works this way.

I have a FormView control bound to an ObjectDataSource.  Let's say our data source is a hypothetical table with three columns:  id, name, age.  Why is it that when I use the <asp:Table> element inside of the FormView, the parameter values are not set, but when I use the standard <table> tag, it works fine?

This seems like a .NET problem to me.  I expect the <asp:Table> element to work in the same way as <table> because they are, for all intents and purposes, the same thing.  Am I missing something?

DropDownList within FormView Error

I have a FormView which works find and I have added a new DropDownList within the form which references another table to which I need to select a value,
I have added the dropdownlist2 and setup a new connection string to this, when I run the page I get this error:

Could not find control 'DropDownList2' in ControlParameter 'CurrencyID'.

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.InvalidOperationException: Could not find control 'DropDownList2' in ControlParameter 'CurrencyID'.
any help would be greatly

Problems posting to a package


Hey Y'all

I'm currently creating a program that accesses a mysql package to add data to a few tables.  I'm currently getting an error that says  "

ORA-01403: no data found
ORA-06512: at "JESSE.PKG_WORKPLAN", line 42
ORA-06512: at "JESSE.PKG_WORKPLAN", line 177
ORA-06512: at line 1


These lines are


and 177:add_team_members(V_PROJECT_ID, V_START_DATE, v_FISC_YEAR, V_MEMBERS ,V_NUM_MEMBERS,'add');

Checking these variables in my asp.net page they are all receiving parameters.

Is there a  way to see what the database is actually receiving from the asp.net page?

Or is there another thing to be looking at?


URL Routing and Existing HttpHandler problems


Hello everyone,

I have a problem:

I am currently using 2 features: 

1. HttpHandler

Registering the path="res.aspx" verb="*"

2. URL Routing:

Registering with this pattern: "Company/Edit/{*companyId}","~/CompanyEdit.aspx"

In my CompanyEdit.aspx page, I used httphandler res.aspx to generate some images at client.

  • res.aspx?img=1
  • res.aspx?img=3

Now the problem is here, the page is load success with companyId = "12345", but when the images was loaded at client, it loaded the CompanyEdit.aspx again and show error with wrong id.  

I have debug and find the problem that because when image's urls were generated to client with url=res.aspx?img=1, url=res.aspx?img=3, the asp.net will understand that they are Company/Edit/res.aspx?img=1, Company/Edit/res.aspx?img=3 when it maps with URL Routing pattern.

=> So the CompanyEdit.aspx was load again with wrong id (id now is "res.aspx"). 

So, do you have any ideas to solve this problem, or other design.

Thanks, and best regard

ASP.NET 4 precompilation problems



We used ASP.NET precompilation (first manually, then with VS2008 WDP) with .NET 3.5 almost (see below) successfully.

After we moved to 4.0, the precompilation no longer works properly. The precompilation process itself succeeds, and the website works, but it consumes about twice the CPU it does without any precompilation. We use non-updatable precompilation (so webpages get compiled completely).

Our internal profiling tells us that most of the threads spend their time within variations of the following stack:


  System.Web.dll!System.Web.Compilation.BuildManager.GetVPathBuildResultFromCacheInternal(System.Web.VirtualPath virtualPath, bool ensureIsUpToDate) + 0xa2 bytes 
  System.Web.dll!System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(System.Web.VirtualPath virtualPath, bool noBuild, bool allowCrossApp, bool allowBuildInPrecompile, bool throwIfNotFound, bool ensureIsUpToDate) + 0x5b bytes 
  System.Web.dll!System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(System.Web.HttpContext context, System.Web.VirtualPath virtualPath, bool noBuild, bool allowCrossApp, bool allowBuildInPrecompile, bool throwIfNotFound, bool ensureIsUpToDate) + 0xcb bytes 

Problems converting VS 2003 project to VS 2008



I'm having problems converting a VS 2003 project to VS 2008 (tried 2005 as well, same problem). There are several problems;
a) I don't have VS 2003 installed.
b) The project is a web service, however I'm not sure what type of VS project it was created as.
c) The general knowledge about the project setup is..slim.

I get a error message using the conversion wizard, however, I'm not familiar with the tool and I cannot quite find any good information on Google for it, so I am left with a error message I do not understand.

Conversion Issues - myProject.csproj:
Unable to open the Web site 'C:\local\path\to\project\myProject.csproj'. The Web site 'C:\local\path\to\project\myProject.csproj' does not exist.

The web service is not intended to run on the dev machine, it is copied to a test or a prod server. However, I do not know how this was done previously. I'm thinking that in order to convert, it has to access the server on which it should run (which is set somehow in a config maybe). But that doesn't actually make any sence..

If anyone could shed light on this, I would really appreciate it.

Thank you.

.AspNet-Menu-Selected Problems


I am trying to have the selected item in the menu be noticeable different than the other items.  I am able to change the border as in the samples, but nothing else. I would like the selected font color to change as well as the background image / color.  Here is a sample page and style sheet.  Any help is greatly appreciated.

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

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
    <link href="MainStyle.css" rel="stylesheet" type="text/css" />
    <form id="form1" runat="server">
    <table border="0" cellpadding="0" cellspacing="0" style="width: 100%; height: 100%">
                    <!-- Indention Pushes First Link Over -->

Design Patterns: Problems and Solutions with Model-View-ViewModel


The Model-View-ViewModel (MVVM) design pattern describes a popular approach for building Windows Presentation Foundation or Microsoft Silverlight applications. Robert McCarter shows you how the ViewModel works, and discuss some benefits and issues involved in implementing a ViewModel in your code.

Robert McCarter

MSDN Magazine July 2010

Concurrency Hazards: Solving 11 Likely Problems In Your Multithreaded Code


Here we describe some of the more common challenges to concurrent programming and present advice for coping with them in your software.

Joe Duffy

MSDN Magazine October 2008

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

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend