How to call javascript function from code behind?

I want to execute javascript function from code behind page.

I have two way that first that I can call javascript of html page in my code behind.

second is that i can write javascript function in to my code behind.

but i am not which one is better and how can i do this.

Please tell me that how can i do this.

Answers:

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Method 1

ScriptManager.RegisterStartupScript(...)

Look here for details

Method 2

You can call Js functions as a script registered on the codebehind itself.

Page.RegisterStartupScript("key","value")

key is the name you want to give the script eg. “PageClose”
value is the;

stringBuilder str = new StringBuilder()
str.Append("<script = language='javascript'>");
str.Append("window.close();");
str.Append("</script>")

here instead of using the window.close you coud append your js function as a string, ideally i put this string builder class and build the script in the constructor if i need it always in the page

Then use this in the event handler you want to execute the script

Page.RegisterStartUp("PageClose",str.ToString());

This would place the javascript before the closing tag of the page thats rendered

Page.ClientScriptBlock("PageClose",str.ToString());

This would place the JS function after the opening tag of the page thats rendered

Hope this helps

Method 3

Try the following in your codebehind

ClientScript.RegisterStartupScript(GetType(), "scrptName", "javascript: alert('hi'); ", true);

You can replace alert(‘hi’); with your javascript function you want to call from code behind.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0