How to use registeronsubmitstatement

It adds script that executes in response on page’s onsubmit event. It provides an opportunity of validation before accepting the user’s submission.

Method contains their as:

RegisterOnSubmitStatement(Type type,string key,string script)

 we can actually check if it is already been added somewhere else in our code,

IsOnSubmitStatementRegistered.This method will check if script with a given key and type pair is already registered on the page.

How to use It

ClientScriptManager csManager = Page.ClientScript;

        Type vartype = this.GetType();

        if (!csManager . IsOnSubmitStatementRegistered (vartype ,"buttonClick"))

        {

            StringBuilder messagetxt = new StringBuilder();

        messagetxt.Append(" ");

        csManager.RegisterOnSubmitStatement(vartype, "buttonClick" , messagetxt.ToString() );

        }