Unable to get javascript value from label

Question

I'm a newbie in programming thus do pardon me.

I have a .js game that outputs a variable called "score".

I require the variable to be able to be displayed on my asp label and after which grabbing its value for database storage onClick()

Currently what I have been able to do were:

@ .js:

    document.getElementById('score').value = score;

@ .aspx:

    <asp:Label runat="server"  ID="score"></asp:Label>

The score is reflected on this label right now. However, I need to do a additional function which is to obtain the value of 'score' from the label and use it as a String in C#

Side note: asp-classic is unlikely the tag you want... at least your code is in ASP.Net... re-tagged. — Alexei Levenkov
– Alexei Levenkov, Commented Nov 6, 2012 at 5:25

Adil · Accepted Answer · 2012-11-06 04:25:14Z

3

Use ClientID of server control as id score would have changed in the generated html by asp.

Change

document.getElementById('score').value = score;

To

document.getElementById('<%= score.ClientID %>').value = score;

answered Nov 6, 2012 at 4:25

Adil

148k25 gold badges217 silver badges207 bronze badges

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

10 Comments

user1801974 Over a year ago

Hi Adil, I have used your above codes. However, when i call label.Text in my C# code, it shows null

Adil Over a year ago

Label text is not posted back you can use hidden field to store the value and access it in code behind. msdn.microsoft.com/en-us/library/…

user1801974 Over a year ago

This error occurred when I use the hiddenfield Error 10 'System.Web.UI.WebControls.HiddenField' does not contain a definition for 'Text' and no extension method 'Text' accepting a first argument of type 'System.Web.UI.WebControls.HiddenField' could be found (are you missing a using directive or an assembly reference?)

Adil Over a year ago

You have to use Value instead of Text

user1801974 Over a year ago

.js: document.getElementById('<%= score.ClientID %>').value = score;

|

Sooraj · Accepted Answer · 2012-11-06 06:49:17Z

1

Could you please try the below suggession.

in .js

document.getElementById('<%= lblScore.ClientID %>').innerHTML = 'Test Value';
document.getElementById('<%= hdnScore.ClientID %>').value = 'Test Value';

in .aspx

<asp:Label runat="server" ID="lblScore"></asp:Label>
<asp:HiddenField ID="hdnScore" runat="server" />

onclick event

var score = hdnScore.Value;

Hope this will help you to fix the issue.

edited Nov 6, 2012 at 6:49

answered Nov 6, 2012 at 6:42

Sooraj

417 bronze badges

Collectives™ on Stack Overflow

Unable to get javascript value from label

2 Answers 2

10 Comments

in .js

in .aspx

onclick event

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

10 Comments

in .js

in .aspx

onclick event

Comments

Your Answer

Sign up or log in

Post as a guest

Related