How to get start with Crawler http://en.wikipedia.org/wiki/Web_crawler
how to reset focus to a top of page Place a hidden control at the top of page. and set focus on that control.
How to add more than one query in single Command Object by using ExecuteReader Command ? Use DataReaderObject = commandObject.ExecuteReader(); DataReaderObject.NextResult(); Add MultipleActiveResultSets=true to connection string.
Difference between Custom ASP.NET Control and User Control ? Custom ASP.NET server controls, we can encapsulate custom user interface and other functionality in controls that can be reused on ASP.NET pages
We extend a particular our own control But in User control we does not build our own control as in case of Custom control, we just use the existing control functionality. Like in case of we needs a black dropdown so we needs to create a custom control. But I have to show same header on my all the pages I will create custom control.
What are the disadvantages of using Eval? It is important to note that DataBinder.Eval can carry a noticeable performance penalty over the standard data binding syntax because it uses late-bound reflection. Use DataBinder.Eval judiciously, especially when string formatting is not required.
For more read at http://msmvps.com/blogs/rakeshrajan/archive/ 2005/04/10/41485.aspx
Is there some limit using HTTP GET? 256 character limit is with HTTP GET
Is there some limit using HTTP POST? No
Same method can also be used to determine number of sundays.
How to make a schedule to automated email using ASP.NET ? You can use windows task scheduler or Windows services. You can write a windows console application in vb or c# that sends the mail, and the run it at a pre-dertimined time interval with the windows task scheduler. You can do this for a few different applications and it works flawlessly and link for windows service is provided below http://msdn.microsoft.com/msdnmag/issues /05/03/SchedulingASPNETCode/default.aspx
how to stop an ASP.NET application from continuing Use response.write(" ")