Cant pass parameter from one page to another in asp.net

Question

I am trying to pass parameter from one page to another. In my second page I cant access that parameter. i am new to asp. Please help me

[What is a `NullReferenceException` and how do I fix it?](http://stackoverflow.com/q/4660142/447156) — Soner Gönül, Dec 23 '15 at 07:13
And please show your work and exception message as a plain text, not as an image. — Soner Gönül, Dec 23 '15 at 07:13
Please let us know URL format with parameters and one more thing that Request.QueryString["whatever"] always returns string so no need to convert it to string . — Jaydip Jadhav, Dec 23 '15 at 07:57

score 1 · Answer 1 · answered Dec 23 '15 at 07:14

In your case, the QueryString seems not to contain the parameter Parameter, so it return null and null has no ToString() method.

Try:

var param = Request.QueryString["Parameter"];

if(param != null)
{
    string yourValue = param.ToString();
}

Hope this helps.

If you want to know, which url parameter are passed, you can take a look at Request.QueryString, becaus it contains all parameter. Be sure your are encoding them correctly in the URL:

www.example.com/home.aspx?param1=Hello&param2=world

score 0 · Answer 2 · answered Dec 23 '15 at 07:16

0

Your page url should be something like this for your code to work

yoururl\mypage.aspx?Parameter=1

answered Dec 23 '15 at 07:16

Rajeev Kumar

4,901
8
48
83

score 0 · Answer 3 · answered Dec 23 '15 at 07:17

0

You could also get the parameter like that if you use post/get:

String name = HttpContext.Current.Request.Params["name"];

answered Dec 23 '15 at 07:17

kaliba

230
2
12

score 0 · Answer 4 · answered Dec 23 '15 at 07:21

Assume you have two pages PageWithParameter.aspx and PageRecievingParameter.aspx

Then you will be sending parameter from pageWithParameter.aspx in this manner

http://www.example.com/pageWithParameter.aspx?parameter1=value1

in the pageRecievingParameter.aspx code behind you will get the value of the parameter like this

String s = Request.QueryString["parameter1"];

For more information please refer into msdn

https://msdn.microsoft.com/en-us/library/6c3yckfw.aspx

Cant pass parameter from one page to another in asp.net

4 Answers4