如何在托管的托管Web API .NET上捕获错误并将其返回.这是下面的我的代码

Question

如何在托管的托管Web API .NET上捕获错误并返回该错误...这是我的代码下面的代码....

public static ClientContext GetClientContext(string siteURL, string userName, string password, int foldernam)
{
            List<int> folderNames = new List<int>();
            folderNames.Add(foldernam);

                using (var context = new ClientContext(siteURL))
                {
                try
                {
                    context.Credentials = new SharePointOnlineCredentials(userName, ToSecureString(password));
                    Web web = context.Web;
                    List list = context.Web.Lists.GetByTitle("Bids");
                    var folder = list.RootFolder;
                    context.Load(folder);
                    context.ExecuteQuery();
                    foreach (int folderName in folderNames)
                    {
                        ListItemCreationInformation newItemInfo = new ListItemCreationInformation();
                        newItemInfo.UnderlyingObjectType = FileSystemObjectType.Folder;
                        newItemInfo.LeafName = folderName.ToString();
                        ListItem newListItem = list.AddItem(newItemInfo);
                        newListItem["Title"] = folderName;
                        newListItem.Update();
                    }
                    context.ExecuteQuery();
                    return context;
                }
                catch (Exception ex)
                {
                    // i need to return an error here??????how do i return
                    //return ClientContext 
                    //throw ex;
                }
            }
}

Answer 1

使用WebApi2您可以投掷httpresponseexception：

throw new HttpResponseException(HttpStatusCode.NotFound);

看文档。我希望这会有所帮助吗？

编辑：自定义错误信息：从文档中：

要获得对响应的更多控制，您还可以构造整个响应消息，并将其与httpresponseexception一起包含：

public Product GetProduct(int id)
{
    Product item = repository.Get(id);
    if (item == null)
    {
        var resp = new HttpResponseMessage(HttpStatusCode.NotFound)
        {
            Content = new StringContent(string.Format("No product with ID = {0}", id)),
            ReasonPhrase = "Product ID Not Found"
        };
        throw new HttpResponseException(resp);
    }
    return item;
}