将linq查询的输出转换为字符串时出现问题

Question

我很抱歉问这个基本的问题，

var filePath = (from Component comp1 in componentContainer where comp1.ComponentName == fileName select comp1.FilePath);

我想把输出转换成字符串。

我尝试了这些事情:

string filePath = (from Component comp1 in componentContainer where comp1.ComponentName == fileName select comp1.FilePath).ToString();

和

 var filePath = (from Component comp1 in componentContainer where comp1.ComponentName == fileName select comp1.FilePath);
        string filePathInString = filePath.ToString();

两次都出错:

Linq.Internals.UnoptimizedQuery<string>

请帮我一下

我该如何解决这个问题?

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Answer 1

尝试将查询更改为

string filePath = (from Component comp1 in componentContainer where comp1.ComponentName == fileName select comp1.FilePath).FirstOrDefault().ToString();

Answer 2

string filePath=componentContainer.Single(x=>x.ComponentName==fileName).FilePath;