c# button click input value return empty-CodePudding

I'm trying to get value from input in code behind the problem is value always return empty "" when im using master page but its working fine without master page

html

<asp:UpdatePanel ID="UpdatePanel3" runat="server">
    <ContentTemplate>
        <form action="#" method="post" >
            <input type="text"  runat="server" id="email" placeholder="email"  />
        </form>
    </ContentTemplate>
    <Triggers>
        <asp:PostBackTrigger ControlID="btnRegister" />
    </Triggers>
</asp:UpdatePanel>

code behind

protected void btnRegister_Click(object sender, EventArgs e)
{
    string email = email.Value; //retun empty " "
}

CodePudding user response：

you have to use

<div>
   <form action="#" method="post" >
      
    <asp:ScriptManager ID="ScriptManager1" runat="server" />
  <asp:UpdatePanel ID="UpdatePanel3" runat="server">
 ...
 <asp:TextBox ID="txtEmail" runat="server" CssClass="form-control"</asp:TextBox>
....
    </form>

and get value

var email = txtEmail.Text;

CodePudding user response：

i just removed other

 <form action="#" method="post" >

from MasterPage and its working fine now