如何通过WCF-RIA-Services JSON端点插入实体 [英] How to insert entity over WCF-RIA-Services JSON endpoint

问题描述

我的WCF-RIA DomainService具有一个如下所示的插入方法:

My WCF-RIA DomainService has an insert method that looks like this:

public void InsertWidget(WidgetDef widgetDef)

class WidgetDef
{
    [Key]
    int widgetID;
    string title;
    int x;
    int x;
    // there are more properties, but I think you get the idea...
}

要通过JSON端点访问此地址，我想我需要将更改集发布到url:

To access this through the JSON endpoint, I think I need to POST a changeset to the url:

[serverURL] [namespace] WidgetService.svc/json/SubmitChanges.

[serverURL][namespace]WidgetService.svc/json/SubmitChanges.

我很确定我的URL正确，因为我的请求到达了WidgetService.Initialize方法，但是随后我在服务器中得到一个异常-这并不奇怪，因为我不知道请求的内容是什么应该看起来像.

I'm pretty sure I got the URL correct, because my request reaches the WidgetService.Initialize method, but then I get an exception in the server - which is no surprise because I don't know what the content of the request should look like.

我的问题:用于插入操作的HTTP请求内容的(JSON)格式是什么?

My Question: What is the (JSON) format of a HTTP request's content for an insert operation?

推荐答案

为给定示例插入更改集将如下所示:

Insert changeset for the example given would look like this:

{"changeSet":[ 
        {"Id":0, 
         "Entity":{"__type":"WidgetDef:#widgetDefNamespace",
                    "widgetId":0, 
                    "title":"the new title", 
                    "x":10, 
                    "y":10, 
                }, 
            "Operation":2    // '2' for insert, '3' for update, '4' for delete 
        } 
    ] 
} 

感谢以下博客文章: http://www.joseph-connolly.com/blog/post/WCF-RIA-Services-jQuery-and-JSON-endpoint-Part-2.aspx

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