javascript - tinymce no value when c# button is clicked -

i content of tinymce in backend i'm ending no values returned.

this have:

html markup:

<asp:content id="content1" contentplaceholderid="maincontent" runat="server">      <script type="text/javascript" src="/tinymce/js/tinymce/tinymce.min.js"></script>     <div style="margin-top: 50px;">         <span>set content left side content</span> <script type="text/javascript"> tinymce.init({     selector: "textarea",     theme: "modern",     image_advtab: true,     templates: [         {title: 'test template 1', content: 'test 1'},         {title: 'test template 2', content: 'test 2'}     ] }); </script>     <textarea id="leftcontent" runat="server" name="content" style="width:100%"></textarea>          </div>       <div style="margin-top: 50px;">         <span>set content right side content</span> <script type="text/javascript">     tinymce.init({         selector: "textarea",         theme: "modern",         image_advtab: true,         templates: [             { title: 'test template 1', content: 'test 1' },             { title: 'test template 2', content: 'test 2' }         ]     }); </script>       <textarea id="rightcontent" runat="server" name="content" style="width:100%"></textarea>          </div>      <div style="margin-top: 20px;" class="row">         <asp:button runat="server" id="btnsave" text="save" onclick="btnsave_onclick" cssclass="btn btn-success pull-right"/>     </div>  </asp:content> 

backend:

 protected void btnsave_onclick(object sender, eventargs e)         {             string test = leftcontent.innerhtml;             string t2 = rightcontent.innerhtml;         } 

any idea doing wrong?

thanks, laziale

you may try call following on button click:

tinymce.triggersave(); 

and send editor content eigther using updated textarea content or editor content directly using tinymce.get('leftcontent').getcontent();