Cannot get a textbox value
<p>I have 2 textboxes on an Asp.net(with c#) page and I cannot see this fields from cs class.</p>

<p>In aspx:</p>

<pre><code> &lt;asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent"&gt;
   &lt;ajaxToolkit:ToolkitScriptManager runat="server"&gt;&lt;/ajaxToolkit:ToolkitScriptManager&gt;

&lt;div&gt;
&lt;table&gt;
&lt;tr&gt;
   &lt;td style="width:40%"&gt; &lt;asp:Label ID="lblFullname" runat="server" Text="Fullname" &gt;&lt;/asp:Label&gt;&lt;/td&gt;
   &lt;td style="width:20%"&gt; &lt;/td&gt;
   &lt;td style="width:40%"&gt; 
       &lt;asp:TextBox ID="txtFullname" runat="server"&gt;&lt;/asp:TextBox&gt;
    &lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;
   &lt;td style="width:40%"&gt; &lt;asp:Label ID="lblBirthDate" runat="server" Text="BirthDate" &gt;&lt;/asp:Label&gt;&lt;/td&gt;
   &lt;td style="width:20%"&gt; &lt;/td&gt;
   &lt;td style="width:40%"&gt;
      &lt;asp:TextBox ID="txtBirthDate" runat="server" Text="" &gt;&lt;/asp:TextBox&gt; 
      &lt;ajaxToolkit:MaskedEditExtender ID="MaskedEditExtenderBirthDate" TargetControlID="txtBirthDate" runat="server" 
      UserDateFormat="DayMonthYear" Mask="99/99/9999" MaskType="Date" &gt;&lt;/ajaxToolkit:MaskedEditExtender&gt;
   &lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan="3" style="float:right"&gt;&lt;asp:Button Text ="Save"  runat="server" ID="btnSave" OnClick="btnSave_Click"/&gt; &lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;
</code></pre>

<p></p>

<p>And I am trying to get value from the txtFullname.I try txtFullname.Text  and this.txtFullname but the application cannot see this values .
Can somebody how can I get the value for that textbox?</p>
