Login控件里的验证信息怎么让它显示？

Question

这是我的Login控件代码
<asp:Login ID="Login1" runat="server" 
    CreateUserText="Sign Up for Your New Account" CreateUserUrl="~/Register.aspx" 
    DestinationPageUrl="~/Member/Default.aspx" TitleText="" 
    DisplayRememberMe="False" RememberMeText="">
属性窗口中 UserNameRequiredErrorMessage 用户名不能为空 类似的都填写了，为什么当我不输入用户名点登陆时，错误信息不显示？

Answer 1

但是我要用membership，必须用Login控件

Answer 2

==
只使用MemberShip的API就可以了    <table>
      <tr>
          <td>用户名:</td>
          <td><asp:textbox id="txtUserName" runat="server"></asp:textbox></td>
      </tr>
      <tr>
          <td>密码:</td>
          <td><asp:textbox id="txtPassword" runat="server" textmode="Password"></asp:textbox></td>
      </tr>
      <tr>
          <td>Email:</td>
          <td><asp:textbox id="txtEmail" runat="server"></asp:textbox></td>
      </tr>
      <tr>
          <td>密码问题</td>
          <td>
            <asp:DropDownList ID="ddlPasswordQuestion" Runat="server" Width="100%">
              <asp:ListItem>你母亲的名字是？</asp:ListItem>
              <asp:ListItem>你在那里出生的？</asp:ListItem>
              <asp:ListItem>你最喜欢吃什么？</asp:ListItem>
            </asp:DropDownList>
          </td>
      </tr>
      <tr>
          <td>答案</td>
          <td><asp:textbox id="txtPasswordAnswer" runat="server"></asp:textbox></td>
      </tr>                    
      <tr>
          <td style="TEXT-ALIGN: center" colspan="2">
              <asp:button id="btnRegister" runat="server" text="注册用户" OnClick="btnRegister_Click" />
          </td>
      </tr>
    </table>
    <br />
    <br />
    <asp:label id="lblMessage" runat="server"></asp:label>    protected void btnRegister_Click(object sender, EventArgs e)
    {
        lblMessage.Text = string.Empty;
        string userName = txtUserName.Text;
        string password = txtPassword.Text;
        string email = txtEmail.Text;
        string passwordQuestion = ddlPasswordQuestion.SelectedValue;
        string passwordAnswer = txtPasswordAnswer.Text;        MembershipCreateStatus result;
        Membership.CreateUser(userName, password, email, passwordQuestion, passwordAnswer, true, out result);        switch (result)
        {
            case MembershipCreateStatus.Success:
                txtUserName.Text = string.Empty;
                txtPassword.Text = string.Empty;
                txtEmail.Text = string.Empty;
                ddlPasswordQuestion.SelectedIndex = -1;
                txtPasswordAnswer.Text = string.Empty;
                lblMessage.Text = "成功创建用户!";
                Response.Redirect("~/Login.aspx");
                break;
            case MembershipCreateStatus.InvalidUserName:
                lblMessage.Text = "用户名格式不正确."; break;
            case MembershipCreateStatus.InvalidPassword:
                lblMessage.Text = "密码格式不正确."; break;
            case MembershipCreateStatus.InvalidEmail:
                lblMessage.Text = "Email密码格式不正确."; break;
            case MembershipCreateStatus.InvalidQuestion:
                lblMessage.Text = "密码问题格式不正确."; break;
            case MembershipCreateStatus.InvalidAnswer:
                lblMessage.Text = "密码答案格式不正确."; break;
            case MembershipCreateStatus.DuplicateUserName:
                lblMessage.Text = "用户名已被注册."; break;
            case MembershipCreateStatus.DuplicateEmail:
                lblMessage.Text = "Email地址已被注册."; break;
            default:
                lblMessage.Text = "创建用户发生错误."; break;
        }
    }