System.Web.UI.Controls.FormView.DataItemCount cannot be 0?

Question

0.00/5 (No votes)

See more:

I'm checking for the number of items in a control (System.Web.UI.Controls.FormView.DataItemCount) within Page_Load, and, somehow the value is being returned as '3' even when the FormView has not yet been populated.

I'm following this MSDN article, and, currently using VS 2008 / Win XP SP 3 / IIS 5.1 on my workhorse...laptop used for development.

Any idea why?
:confused:

C#

<pre lang="cs">protected void Page_Load(object sender, EventArgs e)
   {
       this.Title = "Jon's Couch";
       Envelope.DataBind();
       //select last date selected on calArticles
       if (this.ViewState["CalendarDate"] != null)
       { calArticles.SelectedDate = (DateTime)this.ViewState["CalendarDate"]; }
       if (Envelope.DataItemCount > 0)
       {
           btnEdit.Enabled = true;
           btnSave.Enabled = false;
           btnCancel.Enabled = false;
           btnRefresh.Enabled = true;
           btnDelete.Enabled = true;
       }
       else if (Envelope.DataItemCount == 0) 
//TODO: Bug - Envelope.DataItemCount is '3' instead of '0' when there are no data items.
       {
           btnEdit.Enabled = false;
           btnSave.Enabled = false;
           btnCancel.Enabled = false;
           btnRefresh.Enabled = true;
           btnDelete.Enabled = false;
       }
   }

Complete source code here.

Posted 31-Aug-10 20:39pm

jon-80

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sandeep Mewara · Accepted Answer · 2010-09-01T10:20:00

Solution 1

Whats the point of having Envelope.DataBind(); in second line of your page load?

Probably, your databind is storing the data in ViewState and thus you get 3 counts all the time. Should you be using a IsPostback page proerty?

Posted 1-Sep-10 10:20am

Sandeep Mewara

Comments

jon-80 2-Sep-10 6:29am

Thanks.

IsPostback was not used, because when I was planning the logic, I wasn't bothered whether the Page was being loaded for the first time or as a postback (refresh).