ASP.Net不知道文本框

Question

I've created a form in asp.net where the user inserts email address subject and a message and then he clicks on send.

The mail is being send with some fake inputs

I'm trying to get the input from the textbox but for some reason I can't.

This is what I did in my asp site:

<form id="contact-form"  >
                <div class="row">
                    <div class="col-md-10">
                        <div class="form-group">
                            <asp:Label ID="Label1" runat="server" Text="Name" CssClass="labelnew"></asp:Label>
                            <asp:TextBox ID="TextBox1" runat="server" CssClass="form-control" placeholder="Enter name"  required="required"></asp:TextBox>

                        </div>

                        <div class="form-group">
                            <asp:Label ID="Label2" runat="server" Text="Your Email Address" CssClass="labelnew"></asp:Label>
                            <asp:TextBox ID="txtemail" runat="server" CssClass="form-control" placeholder="Enter email" required="required"></asp:TextBox>

                    </div>

                          <div class="form-group">
                            <asp:Label ID="lblmsg" runat="server" Text="Message" CssClass="labelnew"></asp:Label>
                              <asp:TextBox ID="TextBox2" runat="server" placeholder="Message" CssClass="form-control"  TextMode="MultiLine" Rows="9" Columns="25" required="required"></asp:TextBox>
                           </div>


                    <div class="col-md-12">

<asp:Button ID="Button1" runat="server" Text="Send Message"  onclick="Button1_Click" 
                            BackColor="#0066CC" Font-Names="Aharoni" ForeColor="White" 
                            ></asp:Button>
                    </div>
                </div>
                </div>
                </form>

This is what I did in my c# code behind:

protected void Button1_Click(object sender, EventArgs e)
{
MailMessage mailMessage = new MailMessage();
mailMessage.To.Add("mymail@ebay.com");
mailMessage.From = new MailAddress("a"); 
mailMessage.Subject = "ya";
mailMessage.Body = "ya";
    SmtpClient smtpcl = new SmtpClient("mysmtp");
smtpcl.Send(mailMessage);
   string a= TextBox1.text;
 }

For some reason it doesn't seem to know TextBox1, any idea why?

Answer 1

Other than the runat="server" in tag.. please check the following... 1. AutoEventWireup="true". If not set not true, you need to explicitly do it in the code behind.

<%@ Page Language="vb" AutoEventWireup="true" 
    CodeBehind="YourPageName.aspx.vb" Inherits="YourNamespace.YourPageName" %>

2. is it partial class?

   Partial Class YourPageName Inherits System.Web.UI.Page

   End Class