What is viewstate in ASP.NET?
The postback question is the heart of any interview on ASP NET. When a postback happens (i.e. when a form is submitted to a server), the variable values that are set in the code-behind page are erased from the memory of the client system. This concept would be different from what happens in Windows-based applications, where the variable variables persist in memory until they are freed from the memory either by the garbage collector, or by specific codes like dispose or finalize.
In web applications, variable values simply get erased. But it is very simple to persist these values. They may be persisted using the Viewstate object. Before the postback is invoked, the variable's value is saved in a viewstate object. In the recieving page, the viewstate's value may be retrieved back. See example code below...
//Save the value in ViewState object before the PostBack
ViewState("SomeVar") = txtFirstName.text;
//Retrieve the value from ViewState object after the PostBack
String strFirstName = ViewState("SomeVar").ToString();
What is the difference between Microsoft Office SharePoint Server 2007 for Internet sites and Microsoft Office SharePoint Server 2007?
Microsoft Office SharePoint Server 2007 for Internet sites and Microsoft Office SharePoint Server2007 have identical feature functionality. While the feature functionality is similar, the usage rights are different.If you are creating an Internet, or Extranet, facing website, it is recommended that you use Microsoft Office SharePoint Server 2007 for Internet sites which does not require the purchase client access licenses. Websites hosted using an "Internet sites" edition can only be used for Internet facing websites and all content, information, and applications must be accessible to non employees.Websites hosted using an "Internet sites" edition cannot be accessed by employees creating, sharing, or collaborating on content which is solely for internal use only, such as an Intranet Portal scenario
difference between a document library and a form library in SharePoint?
What is the difference between a document library and a form library in SharePoint?
Document libraries in SharePoint consist of your main/core documents. For example a word document, excel, PowerPoint, Visio, pdf, csv, notepad etc. Form libraries consist of XML forms.
Difference Between GET and POST methods in HTML
Difference Between GET and POST methods
GET:
1) Data is appended to the URL.
2) Data is not secret.
3) It is a single call system
4) Maximum data that can be sent is 256.
5) Data transmission is faster
6) This is the default method for many browsers
POST:
1) Data is appended to the URL.
2) Data is Secret
3) It is a two call system.
4) There is no Limit on the amount of data.That is characters any amount of data can be sent.
5) Data transmission is comparatively slow.
6) No default and should be Explicitly specified.
ViewState is responsible for maintaining data across the Page Post Back
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.
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