Question

I have 2 textboxes on an Asp.net(with c#) page and I cannot see this fields from cs class.

In aspx:

 <asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
   <ajaxToolkit:ToolkitScriptManager runat="server"></ajaxToolkit:ToolkitScriptManager>

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

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?

Answer 1

Please check if you have specified the codebehind file name correctly.
This could be one of the issues for not getting the control name
inside the code file.

If that isn’t working for you, please use the below code for reference.

You have not included your “Register” directive. So, I took to privilege to give my own.

Change your markup to:

<%@ Page Title="Home Page" Language="vb" MasterPageFile="~/Site.Master" AutoEventWireup="false"
    CodeBehind="Default.aspx.vb" Inherits="WebApplication2._Default" %> 
   <%@ Register TagPrefix="asp" Namespace="AjaxControlToolkit" Assembly="AjaxControlToolkit" %>
        <asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="Server" />
    <div>
        <table>
            <tr>
                <td style="width: 40%">
                    <asp:Label ID="lblFullname" runat="server" Text="Fullname"></asp:Label>
                </td>
                <td style="width: 20%">
                </td>
                <td style="width: 40%">
                    <asp:TextBox ID="txtFullname" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td style="width: 40%">
                    <asp:Label ID="lblBirthDate" runat="server" Text="BirthDate"></asp:Label>
                </td>
                <td style="width: 20%">
                </td>
                <td style="width: 40%">
                    <asp:TextBox ID="txtBirthDate" runat="server" Text=""></asp:TextBox>
                    <asp:MaskedEditExtender id="MaskedEditExtenderBirthDate" targetcontrolid="txtBirthDate"
                        runat="server" userdateformat="DayMonthYear" mask="99/99/9999" masktype="Date"></asp:MaskedEditExtender>
                </td>
            </tr>
            <tr>
                <td colspan="3" style="float: right">
                    <asp:Button Text="Save" runat="server" ID="btnSave" OnClick="btnSave_Click" />
                </td>
            </tr>
        </table>
    </div>
</asp:Content>

This code has been tested and is working.