How can you to add JavaScript to a page when performing an asynchronous postback?

Question

Amit Singh · Answer

Use the ScriptManager class. This class 
contains several methods like the RegisterStartupScript(), 
RegisterClientScriptBlock(), RegisterClientScriptInclude(), 
RegisterArrayDeclaration(),RegisterClientScriptResource(), 
RegisterExpandoAttribute(),and RegisterOnSubmitStatement() which helps to 
add javascript while performing an asynchronous postback.

Varun Agrawal · Answer

For all three, a script element is rendered after the opening form tag. Following are the differences:
1 - RegisterClientScriptBlock - The script is specified as a string parameter.
2 - RegisterClientScriptInclude - The script content is specified by
 setting the src attribute to a URL that points to a script file.
3 - RegisterClientScriptResource - The script content is specified 
with a resource name in an assembly. The src attribute is automatically 
populated with a URL by a call to an HTTP handler that retrieves the 
named script from the assembly.

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How can you to add JavaScript to a page when performing an asynchronous postback?

Amit Singh

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