Explain Querystring in asp.net with advantages and Disadvantages.

Querystring is a way to passing data from one page to another page through the URL. We can pass value through querystring parameter which will append at the end of a page URL. Data is visible in url. This is the main drawback of this method of passing the value. But we can protect the data by encryption.

Example:

In asp.net we send data as:

 Response.Redirect("webform2.aspx?bname="+txtname.Text);

And receive value as:

lblbname.Text = Request.QueryString["bname"];

In Url it will look like:

http://localhost:6058/webform2.aspx?bname=5

Advantages:

1. It is supported by all browsers.

2. Querystring is easy to use.

3. Server resources are not required.

4. Extra afford are not needed to code.

Disadvantages:

1. All information is visible to user. Therefore, it is not secure.

2. There is a limit to URL length of 255 characters.