ASP.Net | Read Values from Javascript

Today I started checking out some videos about Windows CardSpace and ASP.Net for logging in and I saw how he used javascript to get client side input and use it in ASP.Net in the C# code.

First you need to create a HiddenField on your webForm and name it TokenField (any name would actually do)

<asp:HiddenField ID=”TokenField” runat=”server” />

To set the Hidden Field value in JavaScript use the following code:



var textbox = document.getElementById(“TokenField”);
textbox.value = value;

To get the data stored in TokenField and use it in ASP.Net code behind use the next:

string token = TokenField.value;

Voila, you just used Javascipt and C# to use each other’s variables. I know that this might be basic for some of you, but for me it’s a life saver 🙂 As for CardSpace, I think it isn’t much in use on websites. What do you think?

For more info re CardSpace check this online tutorial or here

Hello, nice to meet you

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Leave a Reply