I'm using this DocumentDB library in my MVC project. When I call DeleteDocumentAsync method in DocumentClient it returns Null. However, if you look at the method signature, it clearly states that it returns a document: public Task<ResourceResponse<Document>> DeleteDocumentAsync(Uri documentUri, RequestOptions options = null);
我在我的MVC项目中使用这个DocumentDB库。当我在DocumentClient中调用DeleteDocumentAsync方法时，它返回Null。但是，如果查看方法签名，它会明确指出它返回一个文档：public Task
Also in the comments it sais, if that helps:
如果有帮助的话，在评论中也是如此：
// Returns:
//返回：
// The task object representing the service response for the asynchronous operation.
//表示异步操作的服务响应的任务对象。
Any idea why it doesn't return anything? I would expect it to return the deleted document.
知道为什么它不返回任何东西吗？我希望它能够返回已删除的文档。
1 个解决方案
#1
1
The command DeleteDocumentAsync does not return the deleted record itself, but instead returns a document specifying how many records have been deleted. If you for example run this:
命令DeleteDocumentAsync不会返回已删除的记录本身，而是返回一个文档，指定已删除的记录数。例如，如果你运行这个：
var result = await collection.DeleteDocumentAsync(filter);
You can query the number of deleted records using result.DeletedCount.
您可以使用result.DeletedCount查询已删除记录的数量。
Looking at the source code for the driver it actually returns a DeleteResult document, have a look at the source code on GitHub.
查看驱动程序的源代码，它实际上返回一个DeleteResult文档，看一下GitHub上的源代码。
#1
1
The command DeleteDocumentAsync does not return the deleted record itself, but instead returns a document specifying how many records have been deleted. If you for example run this:
命令DeleteDocumentAsync不会返回已删除的记录本身，而是返回一个文档，指定已删除的记录数。例如，如果你运行这个：
var result = await collection.DeleteDocumentAsync(filter);
You can query the number of deleted records using result.DeletedCount.
您可以使用result.DeletedCount查询已删除记录的数量。
Looking at the source code for the driver it actually returns a DeleteResult document, have a look at the source code on GitHub.
查看驱动程序的源代码，它实际上返回一个DeleteResult文档，看一下GitHub上的源代码。