小编Hen*_*mos的帖子

我得到了那个错误 - 您必须在请求正文中传递有效的补丁文档。

public class TFSClient
{
    public WorkItemTrackingHttpClient WorkItem { get; set; }
    public TFSClient()
    {            
        VssCredentials vssCred = new VssCredentials(new WindowsCredential(true));
        WorkItem = new WorkItemTrackingHttpClient(new Uri(TFSServer.Url), vssCred);
    }
}
 public static object UpdateWorkItemByID(int id)
    {
        try
        {
            JsonPatchDocument patchDocument = new JsonPatchDocument
            {
                new JsonPatchOperation()
                {                       
                    Operation = Operation.Add,
                    Path = ItemField.History,
                    Value = "Teste"
                }
            };            
            return  new TFSClient().WorkItem.UpdateWorkItemAsync(patchDocument, id).Result;              

        }

        catch (Exception e)
        {
            throw e;
        }
    }

OBS：这种方法以前有效，现在我遇到了这个错误，我不知道为什么。