ASP.NET Page PreLoad Event and Set Page Variables Value

ASP.NET PreLoad event is used to set page variables value. This event will be fired first time when page initialization completed in asp.net page life cycle.

Syntax

<code>protected void Page_PreLoad(object sender, EventArgs e)
{
	//Code will come here.  
}
</code>

ASP.NET PreLoad Event and Set Page Variables Value Example - Default.aspx

<code><%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" 
Inherits="_Default" %>
<!DOCTYPE html">
<html xmlns="https://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label ID="lblTitle" runat="server" Text="ASP.NET Page Life Cycle"></asp:Label><br />
        <asp:label ID="lblDisplayPageEventsSteps" runat="server" text="Label"></asp:label>
    </div>
    </form>
</body>
</html>
</code>

ASP.NET PreLoad Event and Set Page Variables Value Example - Default.aspx.cs

<code>using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page
{
	string _DefaultValue = "This is default value on InitComplete event";
    protected void Page_PreLoad(object sender, EventArgs e) 
	{ 
	   this.lblDisplayPageEventsSteps.Text = _DefaultValue;
	}
}
</code>

ASP.NET Page Directives 11

Asp.Net page directive

Asp.Net import directive

Asp.Net assembly directive

Asp.Net outpucache directive

Asp.Net master directive

Asp.Net implements directive

Asp.Net previouspagetype directive

Asp.Net reference directive

Asp.Net control directive

Asp.Net register directive

Asp.Net mastertype directive

ASP.NET Page Life Cycle Events 22

Page_PreInit

ASP.NET Page_PreInit event

ASP.NET AutoEventWireup and Page_PreInit

How to set theme on Page_PreInit event

Page_Init

ASP.NET Page_Init event

Initialize variable value in Page_Init event

Page_InitComplete

ASP.NET Page_InitComplete event

Initialize variable value in Page_InitComplete event

Initialize dropdownlist in Page_InitComplete event

Page_PreLoad

ASP.NET Page_PreLoad event

Initialize variable value in Page_PreLoad event

Page_Load

asp.net Page_Load event

Initialize variable value in Page_Load event

Page_LoadComplete

asp.net Page_LoadCompleted event

Initialize variable value in Page_LoadCompleted event

Page_Prerender

asp.net Page_Prerender event

Initialize variable value in Page_Prerender event

Page_PrerenderComplete

asp.net Page_PrerenderComplete event

Initialize variable value in Page_PrerenderComplete event

Page_SavestateComplete

asp.net page_SaveStateComplete event

Read controls value in page_SaveStateComplete event

Page_Unload

asp.net Page_Unload event

Close opened file or resources in Page_Unload event

ASP.NET Validation Controls 37

RequiredFieldValidator

RequiredFieldValidator - Form Validation

Set focus on error RequiredFieldValidator

Set initial default value using initialValue property - RequiredFieldValidator

Display summary popup for all require field

Grouping in RequiredFieldValidator using validationGroup property

Display image notification for require field

Highlight require field using Javascript RequiredFieldValidator

Enable disable RequiredFieldValidator client-side

Enable disable RequiredFieldValidator server-side

Display astrik (*) for require field with tooltip

Cancel Form validation of page

RegularExpressionValidator

Email validation using RegularExpressionValidator

Zip code validation using RegularExpressionValidator

Alpha-numeric validation using RegularExpressionValidator

Latitude validation using RegularExpressionValidator

Number validation using RegularExpressionValidator

Longitude validation using RegularExpressionValidator

Special character validation using RegularExpressionValidator

Phone number validation RegularExpressionValidator

RangValidator

Check minimum and maximum value using RangeValidator

Check data type using RangeValidator

Check date between given date range using RangeValidator

Minimum Maximum value, ControlToValide and ErrorMessage property of RangeValidator

CompareValidator

Compare two input control using CompareValidator

Check data type using CompareValidator

Compare data type operator using CompareValidator

Constant using CompareValidator

Check currency, date, string, integer using CompareValidator

Confirm password using CompareValidator

Disable client side validation using CompareValidator

Age compare using CompareValidator

CustomValidator

Associate CustomValidator to control

Validation client and server side using CustomValidator

ValidationSummary

Display a list of error message using ValidationSummary

Display popup message using ValidationSummary

Different display mode of ValidationSummay

Grouping in ValidationSummary

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