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What is the name of the Web page property that you can query to determine that a Web page is being requested without data being submitted?

Posted By :Virendra Dugar     Posted Date :October 15, 2009    Points :10   Category :ASP.Net 
IsPostBack.

You can also find related Interview Question to What is the name of the Web page property that you can query to determine that a Web page is being requested without data being submitted?  below: 

Does ViewState is responsible for maintaining data across the Page Post Back for Postback controls (like textbox, dropdownlist) and non-postbackcontrols(like label)?

  
It is false. For NonPostback controls it is true but for postback controls, ASP.NET retrieves their values one by one from the HTTP request and copies them to the control values while creating the HTTP response. (More...)

In the page load event I assigned DropDownList's DataSource property to a valid list. On the submit button click.. the same DataSource property is coming as null. Why?

  
As ViewState is not storing the DataSource property.

We have to use Items property of DropDownList to get the items back. (More...)

Why all the page in the GridView show the same data as that in the first page?

  
The HTML code of the GrdiView is:
-----------------------------------------------------------------------------------
Collapse | Copy Code

CellPadding="4" Font-Size="Small" ForeColor="#333333" AllowPaging="True"
AllowSorting="True" onpageindexchanging="GridView_NewStaff_PageIndexChanging"
PageSize="20">

Mode="NextPreviousFirstLast" NextPageText="Next" PageButtonCount="4"
PreviousPageText="Previous" />
...... (More...)

Explain the life cycle of an ASP .NET page.

  
Life cycle of ASP.Net Web Form
Page Request >> Start >> Page Init >> Page Load >> Validation >>
PostBack Event Handling >> Page Rendering >> Page Unload
Page Request - When the page is requested ASP.Net determines
whether the page is to be parsed and compiled or a cached verion
of the page is to be sent without running the page.
Start - Page propertied REQUEST and RESPONSE are SET, if the
page is pastback request then the IsPostBack property is SET and
in addition to this UICulture property is also SET.
Page Initilization - In this the UniqueID of each property is SET.
If the request was postback the data is not yet loaded from the
viewstate.
Page Load - If it was a postback request then the data gets loaded
in the control from the ViewState and control property are set.
Validation - If any control validation present, they are performed
and IsValid property is SET for each control.
PostBack Event Handling - If it was a postback request then any
event handlers are called.
Page Rendering - Before this the viewstate is saved from the page
and RENDER method of each page is called.
Page Unload - Page is fully rendered and sent to the client(Browser)
and is discarded. Page property RESPONSE and REQUEST are unloaded. (More...)

cross page posting in ASP.NET2.0???

  
When we have to post data from one page to another in application we used server.transfer method but in this the URL remains the same but in cross page posting there is little different there is normal post back is done but in target page we can access values of server control in the source page.This is quite simple we have to only set the PostBackUrl property of Button,LinkButton or imagebutton which specifies the target page.In target page we can access the PreviousPage property.And we have to use the @PreviousPageType directive.We can access control of PreviousPage by using the findcontrol method.When we set the PostBackURL property ASP.NET framework bind the HTML and Javascript function automatically. (More...)

What is a master page ?

  
1) A master page provides a framework in which the content of each page on a web site is presented. Master pages make it easy to create pages that have a consistent look.

2) The pages that provide the content that's displayed in a master page are called content pages .

3) The content of each content page is displayed in the master page's content placeholder (More...)

How do you turn off cookies for one page in your site?

  
Use the Cookie. Discard Property which Gets or sets the discard flag set by the server. When
true, this property instructs the client application
not to save the Cookie on the users hard disk when a session ends.
Or
it can be turned off by mentioning cookie state= false in web.config file (More...)

Which property on a Combo Box do you set with a column name, prior to setting the Data Source, to display data in the combo box?

  
ComboBox.DataValueField = "ColumnName"

When we use Databind method for the Combo box we set Display Member and Display Value property to column name. (More...)

How do you turn off cookies for one page in your site?

  
By setting the Cookie. Discard property false. (More...)

How do you turn off your cookies for one page on your site?

  
It can be Turn Off by mentioning Cookies state=false in Web.Config file (More...)

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