C# - Passing C# Variable to JavaScript

Question

I have the following line of code in C#:

Page.ClientScript.RegisterStartupScript(Page.GetType(), null, "window.open('http://localhost:4000/Transaction_Number.aspx?num=<%=trans_number%>', '_newtab')", true);

Now, trans_number is a variable in my C# code-behind. My problem is that when I process the query string (num variable), the result is always:

<%trans_number%>

instead of the contents of that variable. How can I solve this?

RMalke · Accepted Answer · 2013-04-18 15:13:48Z

8

I think, you can resolve this pretty easily... Maybe:

Page.ClientScript.RegisterStartupScript(Page.GetType(), null, "window.open('http://localhost:4000/Transaction_Number.aspx?num=" + trans_number + "', '_newtab')", true);

answered Apr 18, 2013 at 15:13

RMalke

4,12432 silver badges43 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Abbas · Accepted Answer · 2013-04-18 15:28:12Z

2

You have a string that concatenates with a variable and is in turn embedded within another string. Issues like this tend to go away when you use intermediate variables and String.Format method:

string url = String.Format(@"http://localhost:4000/Transaction_Number.aspx?num={0}", trans_number);
string js = String.Format("window.open('{0}', '_newtab')", url);

Page.ClientScript.RegisterStartupScript(Page.GetType(), null, js, true);

answered Apr 18, 2013 at 15:28

Abbas

6,8944 gold badges38 silver badges49 bronze badges

Collectives™ on Stack Overflow

C# - Passing C# Variable to JavaScript

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related