c＃中的表达式术语“string”无效 [英] Invalid expression term 'string' in c#

问题描述

public delegate void FileDelegate(List<string> str);

public event FileDelegate FilesCompleted;


void upload_Status(object sender, EventArgs e)
		{
			FileUpload fu = sender as FileUpload;
			if (fu.Status == FileUploadStatus.Complete)
			{
				if (uploading)
					UploadFiles();
				if (FilesCompleted != null)
				{
				if (files.Count == files.Count(q => q.Status ==  FileUploadStatus.Complete))		
              FilesCompleted(files.ToList(string));
				}

			}
}

当我将程序填充到下面错误消息

When i Bulid the program i got below Error message

FilesCompleted(files.ToList(string));

无效的表达式术语'字符串'



请帮助我...

"Invalid expression term 'string'"

Please Help Me...

推荐答案

好的是 - 字符串是类型， str 是你显示的变量。

尝试：

Well yes - string is the type, str is the variable you show.
Try:

FilesCompleted(files.ToList(str));

但它可能不起作用：你没有显示代码片段的上下文，如图所示的代码将无法编译 - 因此str可能不存在于您编码的确切上下文中。





或者，比尔建议：

But it may not work: you don't show the context of the code fragment, and the code as shown won't compile - so str may not exist in the exact context you are coding.


Or, as Bill suggests:

FilesCompleted(files.ToList<string>());

但这不太可行除非你的文件类隐含转换为字符串。



尝试：

But that is unlikely to work either unless there is a implicit conversion from your file class to a string.

Try:

FilesCompleted(files.Select(f => f.Path).ToList());

假设它是你感兴趣的文件路径传递给代表。

Assuming it's the file path you are interested in passing to the delegate.

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