Call (Execute) function (Method) in Page Load in ASP.Net using C#

Hi tanweeruddinb...,

Check this example. Now please take its reference and correct your code.

Class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

public static class page
{
    public static List<string> MyFunction()
    {
        var retList = new List<string>();
        retList.Add("xzy");
        retList.Add("abc");

        return retList;
    }
}

Code

protected void Page_Load(object sender, EventArgs e)
{
    List<string> lists = page.MyFunction();
    if (lists.Contains("xzy") || lists.Contains("abc"))
    {
        ClientScript.RegisterClientScriptBlock(this.GetType(), "", "alert('Available');", true);
    }
}