Pass a java-script variable to .cs file

Question

I have a listview with label which displays messages from different user.I have used the table row <tr> to get the id and pass it to the javascript.Now i need to pass this javascript variable to the .cs file.

<asp:ListView ID="msg_list" runat="server" OnItemCommand="selectedMsg" >
   <ItemTemplate>
     <table>
      <tr class="myitem" onclick=" selectedid(<%#Eval("senderId")%>) "/>
        <td>
         <asp:Label role="menuitem" ID="msg_lbl" runat="server" text='<%#Eval("msg")%>'/>
        </td>
       <tr>
     </table>

   </ItemTemplate>
</asp:ListView>

Here's the java-script

<script type="text/javascript">
function selectedid( id ) {
    alert(id);

}
</script>

The alert shows the selected row's id value.I need to pass this id value to .cs file.

I guess you could assign the id to Hidden Field.

Hassan Nisar
– Hassan Nisar

2014-08-07 05:13:15 +00:00
Commented Aug 7, 2014 at 5:13 — Hassan Nisar
– Hassan Nisar, Commented Aug 7, 2014 at 5:13
If you don't want to do a form post, then Ajax?

Jane S
– Jane S

2014-08-07 05:19:42 +00:00
Commented Aug 7, 2014 at 5:19 — Jane S
– Jane S, Commented Aug 7, 2014 at 5:19
Can you provide a sample example please.

suman
– suman

2014-08-07 05:21:42 +00:00
Commented Aug 7, 2014 at 5:21 — suman
– suman, Commented Aug 7, 2014 at 5:21
There is a lot of documentation available.

Jane S
– Jane S

2014-08-07 05:33:41 +00:00
Commented Aug 7, 2014 at 5:33 — Jane S
– Jane S, Commented Aug 7, 2014 at 5:33

user35 · Accepted Answer · 2014-08-07 06:18:52Z

2

You can use hidden field for that purpose.Looking at the code above it seems you have got your java-script variable.Now you can pass that value to the hiddenfield and access the hiddenfield value in the .cs file.

This is how it is done.

<asp:HiddenField ID="hdn" runat="server" />

<script type="text/javascript">
  function selectedid( id ) {
   var abc = id;
    document.getElementById('<%= hdn.ClientID %>').value = abc;
}
</script>

Now you can finally get your value in .cs file as string mystr = hdn.value.

Good luck

answered Aug 7, 2014 at 6:18

user35

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