从MongoDB的'收集'获得所有'的文件“ [英] Get All 'documents' from MongoDB 'collection'

问题描述

我需要检索所有的都是我收集MongoDB中的文件，但我无法弄清楚如何。我宣布我的'收集'这样的 -

 私有静态IMongoCollection<项目> SpeCollection = db.GetCollection<项目>（collection_Project）; 
  

和我跟着什么是的this MongoDB的教程。我调整为我所急，想 -

  VAR文件=等待SpeCollection.Find（新项目（））ToListAsync（） ; 
  

不过，我一直有以下错误 -

MongoDB.Driver.IMongoCollection没有为查找的定义，并扩展方法[超长的东西]的最佳覆盖。查找包含非有效的参数。

解决方案

使用驱动程序的当前版本（2.0版），你可以做到这一点通过将匹配一切过滤器：

  VAR文件=等待SpeCollection.Find（_ =>真）.ToListAsync（）; 
  

他们还增加了一个空的过滤器（的 FilterDefinition.Empty ），这将抵达下一版本的驱动程序（V2.1）：

  VAR文件=等待SpeCollection.Find（建设者<项目> .Filter .Empty）.ToListAsync（）; 
  

I need to retrieve all the documents that are in my collection in MongoDB, but I cannot figure out how. I have declared my 'collection' like this-

private static IMongoCollection<Project> SpeCollection = db.GetCollection<Project>("collection_Project");

And I followed what is explained in this MongoDB tutorial. I adjusted it for my needs, like-

 var documents = await SpeCollection.Find(new Project()).ToListAsync();

However, I keep having the following error-

MongoDB.Driver.IMongoCollection does not have a definition for 'Find' and the best override of the extension method [superlong stuff]. Find contains non valid arguments.

解决方案

Using the current version of the driver (v2.0) you can do that by passing a filter that matches everything:

var documents = await SpeCollection.Find(_ => true).ToListAsync();

They have also added an empty filter (FilterDefinition.Empty) which will arrive in the next version of the driver (v2.1):

var documents = await SpeCollection.Find(Builders<Project>.Filter.Empty).ToListAsync();

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