c# - 'OnCheckedChanged' 时 ASP.NET 更新网页

Question

当有人点击 NewUser 复选框时，我试图在我的网页上显示控件，但我无法让它工作。

Webpage Screenshot

这是我的 Login.aspx 代码:

<div class="form-group">
    <div class="col-md-offset-2 col-md-10">
        <div class="checkbox">
            <asp:CheckBox runat="server" ID="NewUser" OnCheckedChanged="UpdateOptions" />
            <asp:Label runat="server" AssociatedControlID="NewUser">New User?</asp:Label>
        </div>
    </div>
</div>

这是我的 Login.aspx.cs 代码:

//DM Create event to make controls visible if check box is selected
        public void UpdateOptions(object update, EventArgs e)
        {
            if(NewUser.Checked == true)
            {
                ConfirmEmailLabel.Visible = true;
                TextBox3.Visible = true;
                ConfirmPasswordLabel.Visible = true;
                TextBox4.Visible = true;
                Firstname.Visible = true;
                TextBox1.Visible = true;
                Lastname.Visible = true;
                TextBox2.Visible = true;
            }
            else
            {
                ConfirmEmailLabel.Visible = false;
                TextBox3.Visible = false;
                ConfirmPasswordLabel.Visible = false;
                TextBox4.Visible = false;
                Firstname.Visible = false;
                TextBox1.Visible = false;
                Lastname.Visible = false;
                TextBox2.Visible = false;
            }
        }

任何想法将不胜感激？

Answer 1

添加这个

<asp:CheckBox runat="server" ID="NewUser" OnCheckedChanged="UpdateOptions" AutoPostBack="true"/>