How to programmatically create a <script> tag and a script inside an ASP.NET page?

Question

From time to time I run into situation in which I could solve a given problem by dynamicly creating piece of JavaScript, spesific to that instance of the page, that I could then insert in the final markup. Usualy this is because I want some behaviour to happen on the client side, rather than on the server side and creating a static JavaScript isn't an option.
For example, when trying to submit a files original path without submitting the file itself, when trying to do it for multiple dynamicly created components.

How would you recommend me to create a script tag and populate it with, for example, JavaScript?

Answer 1

Use your page's ClientScriptManager and it's RegisterClientScriptBlock() method.

string javascript = "javascript goes here"; 
string scriptname = "Name of this script"; // used to prevent adding the same script twice at two places in the page life cycle
if (!Page.ClientScript.IsClientScriptBlockRegistered(scriptname)) 
{ 
    Page.ClientScript.RegisterClientScriptBlock(this.Page.GetType(), scriptname, javascript, true); 
}