验证摘要和表单验证问题ASP.NET

Question

我正在处理一个旧项目，我试图对其进行更新并向其中添加一些内容，并且遇到了我要验证的表单问题。

我尝试将RequiredValidator字段添加到所有表单字段中，但是没有用。我注意到该项目正在使用“ SX：VInput”，并且我之前从未见过，所以它让我很沮丧。代码如下：

Checkout.Aspx

<%@ Page Title="" Language="C#" MasterPageFile="~/Pages/Store.Master"
    AutoEventWireup="true" CodeBehind="Checkout.aspx.cs"
    Inherits="SportsStore.Pages.Cart.Checkout" %>

<asp:Content ID="Content1" ContentPlaceHolderID="bodyContent" runat="server">
    <div id="content">

        <div id="checkoutForm" class="checkout" runat="server">
            <h2>Checkout Now</h2>
            Please enter your details, and we'll ship your goods right away!

        <div id="errors" data-valmsg-summary="true">
            <ul>
                <li style="display:inline"></li>
            </ul>
            <asp:ValidationSummary ID="ValidationSummary1" runat="server" DisplayMode="BulletList" ShowMessageBox="true"/>
        </div>

            <h3>Ship to</h3>
            <div>
                <label for="name">Name:</label>
                <SX:VInput Property="Name" ID="Name" runat="server"/>


            </div>

            <h3>Address</h3>
            <div>
                <label for="line1">Line 1:</label>
                <SX:VInput Property="Line1" runat="server" />
            </div>
            <div>
                <label for="line2">Line 2:</label>
                <SX:VInput Property="Line2" runat="server" />
            </div>
            <div>
                <label for="city">City:</label>
                <SX:VInput Property="City" runat="server" />
            </div>
            <div>
                <label for="state">State:</label>
                <SX:VInput Property="State" runat="server" />
            </div>
            <div>
                <label for="postalcode">Postal Code:</label>
                <SX:VInput Property="PostalCode" runat="server" />
            </div>
            <h3>Account Information</h3>
            <div>
                <label for="email">Email:</label>
                <SX:VInput Property="Email" runat="server" />
            </div>
            <div>
                <label for="password">Password:</label>
                <SX:VInput Property="Password" runat="server" />
            </div>
            <h3>Options</h3>
            <input type="checkbox" id="giftwrap" name="giftwrap" value="true" />
            Gift wrap these items?

        <p class="actionButtons">
            <button class="actionButtons" type="submit">Complete Order</button>
        </p>
        </div>
        <div id="checkoutMessage" runat="server">
            <h2>Thanks!</h2>
            Thanks for placing your order. We'll ship your goods as soon as possible.    
        </div>
    </div>
</asp:Content>


Vinput.cs




    namespace SportsStore.Controls

    {

    public class VInput : WebControl
    {
        private string nspace = "SportsStore.Models";
        private string model = "Order";

        public string Namespace
        {
            get { return nspace; }
            set { nspace = value; }
        }
        public string Model
        {
            get { return model; }
            set { model = value; }
        }

        public string Property { get; set; }

        protected override void RenderContents(HtmlTextWriter output)
        {

            output.AddAttribute(HtmlTextWriterAttribute.Id, Property.ToLower());
            output.AddAttribute(HtmlTextWriterAttribute.Name, Property.ToLower());

            Type modelType = Type.GetType(string.Format("{0}.{1}", Namespace, Model));
            PropertyInfo propInfo = modelType.GetProperty(Property);
       //     var attr = propInfo.GetCustomAttribute<RequiredAttribute>(false);
       //     if (attr != null)
       //     {
       //         output.AddAttribute("data-val", "true");
       //         output.AddAttribute("data-val-required", attr.ErrorMessage);
       //     }
            output.RenderBeginTag("input");
            output.RenderEndTag();
        }

        public override void RenderBeginTag(HtmlTextWriter writer)
        {
        }

        public override void RenderEndTag(HtmlTextWriter writer)
        {
        }
    }
}

在发送到服务器之前，如何获得此表单进行验证？它只是提交而没有立即验证，我需要验证。谢谢。