title: save current page of gridview when page dropdownlist selected index change
body: <p>I am using a multi page gridview to display bunch of data. Here is the code of the gridview.</p>
  
  <pre><code>&lt;asp:GridView ID="unverifiedlist" runat="server" AutoGenerateColumns="false" AllowSorting="true" AllowPaging="true"  OnRowDataBound="unverifiedlist_RowDataBound" style="font-size:12px" &gt;
                          &lt;Columns&gt;&lt;asp:BoundField HeaderText="Surname" DataField="Surname" ReadOnly="true"/&gt;&lt;/Columns&gt;
                          &lt;Columns&gt;&lt;asp:BoundField HeaderText="Firstname" DataField="Givenname" ReadOnly="true"/&gt;&lt;/Columns&gt;
                         ......
                          &lt;Columns&gt;&lt;asp:TemplateField HeaderText="Options" &gt;
                                      &lt;ItemTemplate&gt;
                                          &lt;asp:DropDownList ID="options" runat="server" AutoPostBack="true" OnSelectedIndexChanged="options_SelectedIndexChanged"&gt;
                                              &lt;asp:ListItem&gt;&lt;/asp:ListItem&gt;
                                              &lt;asp:ListItem Value="1"&gt;Verified&lt;/asp:ListItem&gt;
                                              &lt;asp:ListItem Value="2"&gt;Rejected&lt;/asp:ListItem&gt;
                                          &lt;/asp:DropDownList&gt;
                                      &lt;/ItemTemplate&gt;
                                   &lt;/asp:TemplateField&gt;
                                   &lt;asp:TemplateField HeaderText ="Reason"&gt;
                                      &lt;ItemTemplate&gt;
                                          &lt;asp:TextBox ID="reason" runat="server" OnTextChanged ="reason_TextChanged"&gt;&lt;/asp:TextBox&gt;
                                      &lt;/ItemTemplate&gt;
                                   &lt;/asp:TemplateField&gt;
                          &lt;/Columns&gt;
                          &lt;PagerSettings Visible="false"/&gt;            
              &lt;/asp:GridView&gt;
  
  
  &lt;asp:DropDownList ID="PageSelect" AutoPostBack="true" runat="server" OnSelectedIndexChanged="PageSelect_SelectedIndexChanged"&gt;&lt;/asp:DropDownList&gt;
  </code></pre>
  
  <p>there is a column called "option" which contains a dropdownlist, and it will postback everytime when the selected index was changed to save the edited row. I am trying to avoid this frequent postback. So i think if I can save the whole page before user turn to the next page. 
  The problem is the "PageSelect" dropdownlist's postback will trigger the page reload first, then onselectedindexchanged event, at this point, the gridview already turned to the next page. So can anyone give me some advice?</p>