如何在 ASP.NET MVC 页面上显示验证错误消息？

发布于 2024-09-01 03:06:53 字数 1241 浏览 5 评论 0原文

我对 ASP.NET 和 C# 还很陌生，我花了一天时间学习 ASP.NET 会员提供程序的基础知识，我已经构建了所有验证器，但在页面上输出错误消息时遇到了困难。

private void LogCreateUserError(MembershipCreateStatus status, string username)
{
    string reasonText = status.ToString();

    switch (status)
    {
        case MembershipCreateStatus.DuplicateEmail:
        case MembershipCreateStatus.DuplicateProviderUserKey:
        case MembershipCreateStatus.DuplicateUserName:

            reasonText = "The user details you entered are already registered.";
            break;

        case MembershipCreateStatus.InvalidAnswer:
        case MembershipCreateStatus.InvalidEmail:
        case MembershipCreateStatus.InvalidProviderUserKey:
        case MembershipCreateStatus.InvalidQuestion:
        case MembershipCreateStatus.InvalidUserName:
        case MembershipCreateStatus.InvalidPassword:

            reasonText = string.Format("The {0} provided was invalid.", status.ToString().Substring(7));
            break;
        default:
            reasonText = "Due to an unknown problem, we were not able to register you at this time";
            break;

    }

   //CODE TO WRITE reasonText TO THE HTML PAGE ??

}

到目前为止，我一直依赖内置的 ASP:Validators，因此将变量结果输出到页面上的最佳方法是什么。

原文

I am pretty new to ASP.NET and C# I have spent the day learning the basics of the ASP.NET Membership provider I have built all my validator but are getting stuck at outputting my error message on the page.

private void LogCreateUserError(MembershipCreateStatus status, string username)
{
    string reasonText = status.ToString();

    switch (status)
    {
        case MembershipCreateStatus.DuplicateEmail:
        case MembershipCreateStatus.DuplicateProviderUserKey:
        case MembershipCreateStatus.DuplicateUserName:

            reasonText = "The user details you entered are already registered.";
            break;

        case MembershipCreateStatus.InvalidAnswer:
        case MembershipCreateStatus.InvalidEmail:
        case MembershipCreateStatus.InvalidProviderUserKey:
        case MembershipCreateStatus.InvalidQuestion:
        case MembershipCreateStatus.InvalidUserName:
        case MembershipCreateStatus.InvalidPassword:

            reasonText = string.Format("The {0} provided was invalid.", status.ToString().Substring(7));
            break;
        default:
            reasonText = "Due to an unknown problem, we were not able to register you at this time";
            break;

    }

   //CODE TO WRITE reasonText TO THE HTML PAGE ??

}

What is the best way to output the varible result onto the page as I have relied upon the built in ASP:Validators until now.

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酷遇一生 2024-09-08 03:06:53

MVC

请参阅一个很好的示例...

ASP.NET MVC Html.ValidationSummary(true) 不显示模型错误

基本上，您需要传播错误消息以及存在的事实< /em> 从控制器看到的错误。 ModelStateDictionary.AddModelError() 将为您处理这两项任务。

然后，您可以使用 ValidationExtensions.ValidationSummary( ) 显示。

Webforms

您不必为此使用验证器。大多数人都没有。一个简单风格的 DIV 应该可以很好地工作。

例如。

<div id="errorMessageDiv" runat="server"></div>

请注意 runat 参数。

现在在您的代码隐藏中，您可以尝试

errorMessageDiv.innerHTML = "some error message";

如果您确实想使用验证器结账...

http://weblogs.asp.net/ashicmahtab/archive/2008/12/12/putting-messages-into-a-validationsummary -control-from-code.aspx

基本上，您将 ErrorMessage 和 isValid 参数设置为后面代码中的相关验证器。相关的 ValidationSummary 应显示错误消息。

MVC

See for a good example...

ASP.NET MVC Html.ValidationSummary(true) does not display model errors

Basically, you need to propagate the error message and also that fact that there is an error to your view from your controller. ModelStateDictionary.AddModelError() will take care of both of these tasks for you.

You can then use ValidationExtensions.ValidationSummary() to display.

Webforms

You don't have to use a validator for this. Most people don't. A simple styled DIV should work well.

eg.

<div id="errorMessageDiv" runat="server"></div>

Notice the runat parameter.

Now in your code-behind you can try

errorMessageDiv.innerHTML = "some error message";

If you really want to use a validator checkout...

http://weblogs.asp.net/ashicmahtab/archive/2008/12/12/putting-messages-into-a-validationsummary-control-from-code.aspx

Basically you set the ErrorMessage and isValid parameters to the related validator in the code behind. The related ValidationSummary should display the error message.

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