c# - ASP.NET 通过 WebMethod 返回 JSON 对象

Question

我有 ASP.NET 代码

public class OrderInformationResponse
{
    public GetOrderLookupResponseType orderLookupResponse { get; set; }
}
[System.Web.Services.WebMethod]
public static OrderInformationResponse GetOrderInformation(string jobId, string userId, string jobDetails) {
    OrderInformationResponse response = new OrderInformationResponse();
    JobDetails jobDetailsEnum = (JobDetails)Enum.Parse(typeof(JobDetails), jobDetails);
    response.orderLookupResponse = GetOrderLookup(jobId, userId);
    return response;
}

我尝试从 jQuery 调用它:

$.ajax({
            type: "POST",
            url: "somePage.aspx/GetOrderInformation",
            data: "{'jobId':" + jobId + ", " + 
            " 'userId':" + userId + ", " +
                  " 'jobDetails':" + jobDetails +
                  "}",
            contentType: "application/json; charset=utf-8",
            datatype: "json",
            async: true,
            cache: false,
            success: function (msg) {
                p_Func(msg);           // This is a pointer to function.
            }
        });

GetOrderLookupResponseType 声明:

[System.CodeDom.Compiler.GeneratedCodeAttribute("svcutil", "4.0.30319.17929")] 
[System.SerializableAttribute()]
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.ComponentModel.DesignerCategoryAttribute("code")]   [System.Xml.Serialization.XmlTypeAttribute(Namespace="http://schemas.somewhere.uk/MessageContracts/OrderManagement/OrderInfo/2010/02")]
public partial class GetOrderLookupResponseType { ... }

我无法在客户端获取任何内容。在此之前，我尝试从另一个标记为 [WebMethod] 的方法返回 GetOrderLookupResponseType 并且它有效，但是当我尝试将其放入新创建的 OrderInformationResponse它停止工作了。 (我计划用其他内容填充 OrderInformationResponse，这就是我没有使用有效方法的原因)。

Answer 1

public class OrderInformationResponse
{
    public GetOrderLookupResponseType orderLookupResponse { get; set; }
}

[System.Web.Services.WebMethod]
public static void GetOrderInformation(string jobId, string userId, string jobDetails)
{
    OrderInformationResponse response = new OrderInformationResponse();
    JobDetails jobDetailsEnum = (JobDetails)Enum.Parse(typeof(JobDetails), jobDetails);
    response.orderLookupResponse = GetOrderLookup(jobId, userId);
    string json = JsonConvert.SerializeObject(response); //I use Json.NET, but use whatever you want
    HttpContext.Current.Response.ContentType = "application/json";
    HttpContext.Current.Response.Write(json);
}

ASP.NET Web 方法不能很好地处理 JSON 响应。因此将 JSON 直接写入输出并将签名设置为 void 。我用过Json.NET执行 JSON，但任何其他方法通常都应该可以工作。

此外，您还可以更改签名，使其接受字符串作为唯一参数，然后将该 JSON 字符串转换为 OrderInformationRequest在GetOrderInformation() .