c# - 将 json 字符串作为参数传递给 webmethod

Question

我正在向 webmethod EmailFormRequestHandler 发送 ajax post，我可以在客户端(通过 Firebug )看到请求的状态是 200，但它没有到达停止点(第一行网络方法)在我的网络方法中。 json 参数是一个 object 一切正常，但由于我反序列化 json 的方式，我不得不将其更改为字符串。

js:

function SubmitUserInformation($group) {
    var data = ArrayPush($group);
    $.ajax({
        type: "POST",
        url: "http://www.example.com/components/handlers/FormRequestHandler.aspx/EmailFormRequestHandler",
        data: JSON.stringify(data), // returns {"to":"bfleming@allegisgroup.com","from":"bfleming@test.com","message":"sdfasdf"}
        dataType: 'json',
        cache: false,
        success: function (msg) {
            if (msg) {
                $('emailForm-content').hide();
                $('emailForm-thankyou').show();
            }
        },
        error: function (msg) {
            form.data("validator").invalidate(msg);
        }
    });
}

aspx:

[WebMethod]
public static bool EmailFormRequestHandler(string json)
{
    var serializer = new JavaScriptSerializer(); //stop point set here
    serializer.RegisterConverters(new[] { new DynamicJsonConverter() });
    dynamic obj = serializer.Deserialize(json, typeof(object));

    try
    {
        MailMessage message = new MailMessage(
            new MailAddress(obj.to),
            new MailAddress(obj.from)
        );
        message.Subject = "email test";
        message.Body = "email test body" + obj.message;
        message.IsBodyHtml = true;
        new SmtpClient(ConfigurationManager.AppSettings["smtpServer"]).Send(message);
        return true;
    }
    catch (Exception e)
    {
        return false;
    }
}

Answer 1

您在 jQuery JSON 帖子中缺少内容类型:

contentType: "application/json; charset=utf-8",

请参阅这篇文章。当我遇到类似问题时，它对我帮助很大:

• Using jQuery to directly call ASP.NET AJAX page methods (不再可用)
• 来自 Internet Archive: Using jQuery to directly call ASP.NET AJAX page methods

您不需要将 ScriptManager 配置为 EnablePageMethods。

此外，您不需要在 WebMethod 中反序列化 JSON 序列化对象。让 ASP.NET 为您做这件事。将您的 WebMethod 的签名更改为此(注意到我将“电子邮件”附加到“to”和“from”这两个词，因为这些是 C# 关键字，并且命名与关键字相同的变量或参数是一种不好的做法。你将需要相应地更改您的 JavaScript，以便 JSON.stringify() 正确序列化您的字符串:

// Expected JSON: {"toEmail":"...","fromEmail":"...","message":"..."}

[WebMethod]
public static bool EmailFormRequestHandler(string toEmail, string fromEmail, string message)
{
    // TODO: Kill this code...
    // var serializer = new JavaScriptSerializer(); //stop point set here
    // serializer.RegisterConverters(new[] { new DynamicJsonConverter() });
    // dynamic obj = serializer.Deserialize(json, typeof(object));

    try
    {
        var mailMessage = new MailMessage(
            new MailAddress(toEmail),
            new MailAddress(fromEmail)
        );
        mailMessage.Subject = "email test";
        mailMessage.Body = String.Format("email test body {0}" + message);
        mailMessage.IsBodyHtml = true;
        new SmtpClient(ConfigurationManager.AppSettings["smtpServer"]).Send(mailMessage);
        return true;
    }
    catch (Exception e)
    {
        return false;
    }
}