Using method type post/get in asp.net web form
I will start the article from with detailed information.
Actually form has two types of in asp.net2.0.
- Get
- Post
When working with Get method:
- We can access all form input variables in the next page which we mentioned in the action attribute.
- All the submitted information is displayed in the address bar as part of the URL.
- Url Which is not secured because values will be shown in address bar
When working with Post method:
- we can access the variables in the page which we mentioned in the action attribute.
- we can access those variable as shown below
- which is more secured, variable not accessible
Now we will have small application with 2 web pages
1) default.aspx
2) Webform.aspx
GET:
- I have given the value for action attribute is webform1.aspx in the default.aspx page with method type
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form action="webform1.aspx" method="get" >
First name: <input type="text" name="fname" /><br />
Last name: <input type="text" name="lname" /><br />
Age: <input type="text" name="age" /><br />
<input type="submit" value="Submit" />
</form>
</body>
</html>
- Variables will be available in the address bar like below .
http://localhost:50920/webform1.aspx?fname=jhon&lname=smith&age=30
- We can access the variables from the Address to Form using Request.QueryString[] like below.
protected void Page_Load(object sender, EventArgs e)
{
if (Request.QueryString["fname"] != null)
{
Response.Write("fname : " + Request.QueryString["fname"] + \n");
}
if (Request.QueryString["lname"] != null)
{
Response.Write("lname : " + Request.QueryString["lname"] + "");
}
}
POST:
- Variables will be post to the next page using Post method type
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form action="webform1.aspx" method="post" >
First name: <input type="text" name="fname" /><br />
Last name: <input type="text" name="lname" /><br />
Age: <input type="text" name="age" /><br />
<input type="submit" value="Submit" />
</form>
</body>
</html>
- We cannot access the variables from the url.
http://localhost:50920/webform1.aspx
- We can access the variables from the request. Form [].
protected void Page_Load(object sender, EventArgs e)
{
if (Request.Form["fname"] != null)
{
Response.Write("fname : " + Request.Form["fname"] + "\n");
}
if (Request.Form["lname"] != null)
{
Response.Write("lname : " + Request.Form["lname"] + "");
}
}