How To Code Gridview In Load Event

May 28, 2010

ode if Gridview has no row then label.visible = falseie when datasource of Gridview returns no data.How to code it in page load event ?

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Is there a technical reason for the existence of Page.PreLoad or is this just convenience to have a place where you can neatly place code that always have to be executed before the Load code? Is there a difference between adding code in the PreLoad event handler and adding code at the top of the Load event handler? And what would be a typical scenario where you use PreLoad?

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Postback Code In Page Load Event?

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I have alot of code in the page load event as below.

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[code]....

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How To Load IFrame With Hidden Fields After The Page Load Event

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I am using a third party gateway. The third party gateway does not support query-string , so i will need to post the form to pass the values to the given URL and another thing is that they don't expose the web-services so we need to use their page and that means we need to host it in an iframe in asp.net

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Code:
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[Code]..

Now the purpose of this , is to load the iframe after the page load event of the asp.net gets fired.

Now my problem here is that when the iframe loads , it does not pass the parameters to the url that is being set in the iframe.

I have attached the example, project. (2kb)

When you run the project you will notice when the iframe loads there is an Error

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I have created a gridview in code behind (as in its not physically present on the page). I want to know how to call it's rowdatabound event - as data is being bound to it. There happens to be a Gv.RowDataBound function, but how do I use it? (I want the same functionality as what the asp:gridview control has for its onrowdatabind attribute...)

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[code]...

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in my web form i have a department dropdown box, in its selectedIndexChanged event i have to fill the equipment dropdown box and in equiment dropdown selectedIndexChanged i have to fill out the other textboxs.

the depratment dropdown box get its value from sqldatasource.

[code]....

what i want is when i run the page, it shows the very first deparment in the list, and according to that it should pop up the values in the other fields, means it should show the values in the equipment dropdownbox and from that one it should pop up the values in the other textbox.

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[Code]....

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I get an error when attempting to navigate to the page containing this gridview. The error is
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[Code]....

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[Code]....

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How To Create A Base Page Event That Fires After The Derived Page's Load Event

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How do I create a new event in a base page class that fires after all derived pages have fired their load events but before any controls fire their load events.

The following code fires the event before the derived page's load event. I want it to fire the event after the derived page's load event but before all control load events:

Base Class:

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Derived Class:

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Session_End Event Behind Load Balancer

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I'm creating web application behind load balancer. To this moment I configured it to store session in database but I'm not sure how should I handle session expiration. The problem is not sessions are not removed from database but Session_End event because I have to call some web service method in it.

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Edit:

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I am new to asp.net and I'm trying to build my first web page, but when I try to fill a dataset at the page load event I get an error: object reference not set to instance of object. I've done this many times in vb.net. I can't figure out how to step through my code like I do when I'm creating a desktop app, so I don't know exactly where it's failing. I like to be able to see the values of things as it goes through the code.

Code:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
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[code]...

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