title: get the checked item of Bootstrap dropdown checkboxlist checked value in asp.net using c#
body: <p>I am working on a website in which i need to represent many items in dropdownlist with checkboxs.
  for that i m using bootstrap dropdown checkbox list as :</p>
  
  <pre><code>    &lt;head id="Head1" runat="server"&gt;
      &lt;title&gt;&lt;/title&gt;
      &lt;!-- Include Twitter Bootstrap and jQuery: --&gt;
      &lt;link rel="stylesheet" href="css/bootstrap-3.0.0.min.css" type="text/css" /&gt;
      &lt;link rel="stylesheet" href="css/bootstrap-multiselect.css" type="text/css" /&gt;
      &lt;link rel="stylesheet" href="css/prettify.css" type="text/css" /&gt;
  
      &lt;script type="text/javascript" src="js/jquery-2.0.3.min.js"&gt;&lt;/script&gt;
      &lt;script type="text/javascript" src="js/bootstrap-3.0.0.min.js"&gt;&lt;/script&gt;
      &lt;script type="text/javascript" src="js/bootstrap-multiselect.js"&gt;&lt;/script&gt;
      &lt;script type="text/javascript" src="js/prettify.js"&gt;&lt;/script&gt;
  
  &lt;/head&gt;
  &lt;body&gt;
      &lt;form id="form1" runat="server"&gt;
          &lt;div&gt;
  
              &lt;asp:DropDownList ID="ddlItems" multiple="multiple" runat="server"&gt;
                  &lt;asp:ListItem value="cheese"&gt;Cheese&lt;/asp:ListItem&gt;
                  &lt;asp:ListItem value="tomatoes"&gt;Tomatoes&lt;/asp:ListItem&gt;
                  &lt;asp:ListItem value="mozarella"&gt;Mozzarella&lt;/asp:ListItem&gt;
                  &lt;asp:ListItem value="mushrooms"&gt;Mushrooms&lt;/asp:ListItem&gt;
                  &lt;asp:ListItem value="pepperoni"&gt;Pepperoni&lt;/asp:ListItem&gt;
                  &lt;asp:ListItem value="onions"&gt;Onions&lt;/asp:ListItem&gt;
  
              &lt;/asp:DropDownList&gt;
  
              &lt;asp:Button ID="sub" runat="server" OnClick="sub_Click" Text="submit" /&gt;
          &lt;/div&gt;
      &lt;/form&gt;
      &lt;script type="text/javascript"&gt;
          $('#ddlItems').multiselect({
              buttonClass: 'btn btn-default btn-sm'
          });
      &lt;/script&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>Now i have to get the all checked item on button click.
  for that i m trying but i didn't get the items..</p>