Why can't I send data from c# to Javascript file in asp.net?

Question

I have a list of a class created in c# that I have to send its values to a javascript file. I have created a string in c# and put the values of the list in it:

count = 0;
JString = "[";
for(i=0; i<x; i++)
{
    JString += "{Source:" + A[i] + ", Number:" + 3 + ", Target:" + B[i] + "},";
    count++;
}
JString = JString.Remove(JString.Length - 1, 1); //to remove the last ,
JString += "]";
GraphData.Text = "" + "var JString =" + JString + " ;" + "var count =" + count + " ;";

GraphData is a label to save the string.

In the JavaScript file, I added:

 $("#GraphData").val(); //to get the string sent

But it's not working this way. Am I doing something wrong?

Thanks in advance:)

What's the markup look like for GraphData when it's rendered on your browser? I think an asp:Label gets rendered as a <span>, in which case you'd want to call $('#GraphData').text() to get the inner text — David Hoerster
– David Hoerster, Commented Sep 7, 2012 at 11:43
Yes it is. First it wasn't but later I have set it to true but still not working — Hanady
– Hanady, Commented Sep 7, 2012 at 11:44
Is is infinite loop ? This may be source of your problem. Remove 'count++' and it should work for(i=0; i<count; i++) { JString += "{Source:" + A[i] + ", Number:" + 3 + ", Target:" + B[i] + "},"; count++; } — EOG
– EOG, Commented Sep 7, 2012 at 11:44
EOG's right, you have an infinite loop there. the count variable is being incremented inside the for loop. i won't be able to ever catch up. — Icarus
– Icarus, Commented Sep 7, 2012 at 11:48

Fedor Hajdu · Accepted Answer · 2012-09-07 11:49:13Z

1

for(i=0; i<count; i++)
{
    JString += "{Source:" + A[i] + ", Number:" + 3 + ", Target:" + B[i] + "},";
    count++;
}

This looks like an infinte loop. You're increasing both i and count by 1 in every cycle, so i will always be less than count

answered Sep 7, 2012 at 11:49

Fedor Hajdu

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Icarus · Accepted Answer · 2012-09-07 11:54:43Z

0

After you fix the problem with the infite loop, you need to call $('#GraphData').text(); because Label in asp.net is rendered as a span element.

answered Sep 7, 2012 at 11:54

Icarus

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Manish Gupta · Accepted Answer · 2012-09-07 12:39:49Z

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I think here GraphData is the server control. to get this element use its ClientID

try this

$("# <%= GraphData.ClientID%> ").val();

answered Sep 7, 2012 at 12:39

Manish Gupta

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