When we click submit button on a web page, the page post the data to the same page. The technique in which we post the data to different pages is called Cross Page posting. This can be achieved by setting POSTBACKURL property of the button that causes the postback. Findcontrol method of PreviousPage can be used to get the posted values on the page to which the page has been posted.
Friday 13 February 2015
What is the difference between ExecuteScalar and ExecuteNonQuery?
ExecuteScalar returns output value where as ExecuteNonQuery does not return any value but the number of rows affected by the query. ExecuteScalar used for fetching a single value and ExecuteNonQuery used to execute Insert and Update statements.
What are the components of ADO.NET?
The components of ADO.Net are Dataset, Data Reader, Data Adaptor, Command, connection.
What are the different types of cookies in ASP.NET?
Session Cookie – Resides on the client machine for a single session until the user does not log out.
Persistent Cookie – Resides on a user’s machine for a period specified for its expiry, such as 10 days, one month, and never.
Thursday 5 February 2015
What is RedirectPermanent in ASP.Net?
RedirectPermanent Performs a permanent redirection from the requested URL to the specified URL. Once the redirection is done, it also returns 301 Moved Permanently responses.
What is the difference between web config and machine config?
Web config file is specific to a web application where as machine config is specific to a machine or server. There can be multiple web config files into an application where as we can have only one machine config file on a server.
Wednesday 4 February 2015
What are the different types of caching?
ASP.NET has 3 kinds of caching :
- Output Caching,
- Fragment Caching,
- Data Caching.
What is caching?
Caching is a technique used to increase performance by keeping frequently accessed data or files in memory. The request for a cached file/data will be accessed from cache instead of actual location of that file.
What is the difference between Server.Transfer and Response.Redirect?
Server.Transfer page processing transfers from one page to the other page without making a round-trip back to the client’s browser. This provides a faster response with a little less overhead on the server. The clients url history list or current url Server does not update in case of Server.Transfer.
Response.Redirect is used to redirect the user’s browser to another page or site. It performs trip back to the client where the client’s browser is redirected to the new page. The user’s browser history list is updated to reflect the new address.
In which event of page cycle is the ViewState available?
After the Init() and before the Page_Load().
Tuesday 3 February 2015
Where the viewstate is stored after the page postback?
ViewState is stored in a hidden field on the page at client side. ViewState is transported to the client and back to the server, and is not stored on the server or any other external source.
Where the viewstate is stored after the page postback?
ViewState is stored in a hidden field on the page at client side.
ViewState is transported to the client and back to the server, and is not stored on the server or any other external source.
ViewState is transported to the client and back to the server, and is not stored on the server or any other external source.
What is ViewState?
ViewState is used to retain the state of server-side objects between page post backs.
What are the different validators in ASP.NET?
- Required field Validator
- Range Validator
- Compare Validator
- Custom Validator
- Regular expression Validator
- Summary Validator
What is the difference between Server.Transfer and Response.Redirect?
In Server.Transfer page processing transfers from one page to the other page without making a round-trip back to the client’s browser. This provides a faster response with a little less overhead on the server. The clients url history list or current url Server does not update in case of Server.Transfer.
Response.Redirect is used to redirect the user’s browser to another page or site. It performs trip back to the client where the client’s browser is redirected to the new page. The user’s browser history list is updated to reflect the new address.
Difference Between GridView and DataGrid and ListView
GridView, DataGrid and ListView Data-bound controls are used to display and modify data in your Asp.Net web application. These controls also contains others Asp.Net controls like as Label, TextBox, DropdownList etc. into a single layout. In this article, I am going to expose the difference among these three.
Difference between GridView and DataGrid
GridView
DataGrid
It was introduced with Asp.Net 2.0.
It was introduced with Asp.Net 1.0.
Built-in supports for Paging and Sorting.
For sorting you need to handle SortCommand event and rebind grid required and for paging you need to handle the PageIndexChanged event and rebind grid required.
Built-in supports for Update and Delete operations.
Need to write code for implementing Update and Delete operations.
Supports auto format or style features.
This features is not supported.
Performance is slow as compared to DataGrid
Performance is fast as compared to GridView.
Difference between ListView and GridView
ListView
GridView
It was introduced with Asp.Net 3.5.
It was introduced with Asp.Net 2.0.
Template driven.
Rendered as Table.
Built-in supports for Data grouping.
Need to write custom code.
Built-in supports for Insert operation.
Need to write custom code.
Provides flexible layout to your data.
Need to write custom code.
Performance is fast is compared to GridView.
Performance is slow as compared to ListView.
What is Master Pages?
Master pages is a template that is used to create web pages with a consistent layout throughout your application.
Master Pages contains content placeholders to hold page specific content. When a page is requested, the contents of a Master page are merged with the content page, thereby giving a consistent layout.
Master Pages contains content placeholders to hold page specific content. When a page is requested, the contents of a Master page are merged with the content page, thereby giving a consistent layout.
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