blocks|key|4003460|text|string+fileToCopy+=+"c:\\myFolder\\myFile.txt";
string+destinationDirectory+=+"c:\\myDestinationFolder\\";

File.Copy(fileToCopy,+destinationDirectory+%2B+Path.GetFileName(fileToCopy));|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4003461|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>string fileToCopy = "c:\\myFolder\\myFile.txt";
string destinationDirectory = "c:\\myDestinationFolder\\";

File.Copy(fileToCopy, destinationDirectory + Path.GetFileName(fileToCopy));
</code></pre>

blocks|key|1893185|text|File.Copy(@"someDirectory\someFile.txt",+@"otherDirectory\someFile.txt");|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1893186|工作正常。|unstyled|1893187|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>File.Copy(@"someDirectory\someFile.txt", @"otherDirectory\someFile.txt");
</code></pre>

works fine.

blocks|key|1893181|text|MSDN+File.Copy|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1893182|var+fileName+=+"sourceFile.txt";
var+source+=+Path.Combine(Environment.CurrentDirectory,+fileName);
var+destination+=+Path.Combine(destinationFolder,+fileName);

File.Copy(source,+destination);|code-block|syntax|javascript|1893183|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.io.file.copy(v=VS.100).aspx^0|0|E|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

<a href="http://msdn.microsoft.com/en-us/library/system.io.file.copy(v=VS.100).aspx" rel="noreferrer">MSDN File.Copy</a>

<pre><code>var fileName = "sourceFile.txt";
var source = Path.Combine(Environment.CurrentDirectory, fileName);
var destination = Path.Combine(destinationFolder, fileName);

File.Copy(source, destination);
</code></pre>

blocks|key|1564069|text|也许吧|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1564070|File.Copy("c:\\myFolder\\myFile.txt",+"c:\\NewFolder\\myFile.txt");|code-block|syntax|javascript|1564071|1564072|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|K|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|L|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|M|8|@]|9|@]|A|$]]]|I|$]]

Maybe 

<pre><code>File.Copy("c:\\myFolder\\myFile.txt", "c:\\NewFolder\\myFile.txt");
</code></pre>

?

blocks|key|5422189|text|这对我很有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5422190|++++string+picturesFile+=+@"D:\pictures";
++++string+destFile+=+@"C:\Temp\tempFolder\";

++++string[]+files+=+Directory.GetFiles(picturesFile);
++++foreach+(var+item+in+files)
++++{
+++++++File.Copy(item,+destFile+%2B+Path.GetFileName(item));
++++}|code-block|syntax|javascript|5422191|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This worked for me:

<pre><code> string picturesFile = @"D:\pictures";
 string destFile = @"C:\Temp\tempFolder\";

 string[] files = Directory.GetFiles(picturesFile);
 foreach (var item in files)
 {
 File.Copy(item, destFile + Path.GetFileName(item));
 }
</code></pre>

blocks|key|4003466|text|我使用了这段代码，它对我来说很有效|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4003467|//I+declare+first+my+variables
string+sourcePath+=+@"Z:\SourceLocation";
string+targetPath+=+@"Z:\TargetLocation";

string+destFile+=+Path.Combine(targetPath,+fileName);
string+sourceFile+=+Path.Combine(sourcePath,+fileName);

//+To+copy+a+folder's+contents+to+a+new+location:
//+Create+a+new+target+folder,+if+necessary.
if+(!Directory.Exists(targetPath))
{
++++Directory.CreateDirectory(targetPath);
}

//+To+copy+a+file+to+another+location+and+
//+overwrite+the+destination+file+if+it+already+exists.
File.Copy(sourceFile,+destFile,+true);|code-block|syntax|javascript|4003468|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I used this code and it work for me

<pre><code>//I declare first my variables
string sourcePath = @"Z:\SourceLocation";
string targetPath = @"Z:\TargetLocation";

string destFile = Path.Combine(targetPath, fileName);
string sourceFile = Path.Combine(sourcePath, fileName);

// To copy a folder's contents to a new location:
// Create a new target folder, if necessary.
if (!Directory.Exists(targetPath))
{
 Directory.CreateDirectory(targetPath);
}

// To copy a file to another location and 
// overwrite the destination file if it already exists.
File.Copy(sourceFile, destFile, true);
</code></pre>

blocks|key|1893225|text|如果目标目录不存在，File.Copy将抛出。这个版本解决了这个问题|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1893226|public+void+Copy(
++++++++++++string+sourceFilePath,
++++++++++++string+destinationFilePath,
++++++++++++string+destinationFileName+=+null)
{
+++++++if+(string.IsNullOrWhiteSpace(sourceFilePath))
++++++++++++++++throw+new+ArgumentException("sourceFilePath+cannot+be+null+or+whitespace.",+nameof(sourceFilePath));
+++++++
+++++++if+(string.IsNullOrWhiteSpace(destinationFilePath))
++++++++++++++++throw+new+ArgumentException("destinationFilePath+cannot+be+null+or+whitespace.",+nameof(destinationFilePath));
+++++++
+++++++var+targetDirectoryInfo+=+new+DirectoryInfo(destinationFilePath);

+++++++//this+creates+all+the+sub+directories+too
+++++++if+(!targetDirectoryInfo.Exists)
+++++++++++targetDirectoryInfo.Create();

+++++++var+fileName+=+string.IsNullOrWhiteSpace(destinationFileName)
+++++++++++?+Path.GetFileName(sourceFilePath)
+++++++++++:+destinationFileName;

+++++++File.Copy(sourceFilePath,+Path.Combine(destinationFilePath,+fileName));
}|code-block|syntax|javascript|1893227|在.NET+Core2.1上测试|1893228|entityMap^0|A|9|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

If the destination directory doesn't exist, <code>File.Copy</code> will throw. This version solves that
<pre><code>public void Copy(
 string sourceFilePath,
 string destinationFilePath,
 string destinationFileName = null)
{
 if (string.IsNullOrWhiteSpace(sourceFilePath))
 throw new ArgumentException(&quot;sourceFilePath cannot be null or whitespace.&quot;, nameof(sourceFilePath));
 
 if (string.IsNullOrWhiteSpace(destinationFilePath))
 throw new ArgumentException(&quot;destinationFilePath cannot be null or whitespace.&quot;, nameof(destinationFilePath));
 
 var targetDirectoryInfo = new DirectoryInfo(destinationFilePath);

 //this creates all the sub directories too
 if (!targetDirectoryInfo.Exists)
 targetDirectoryInfo.Create();

 var fileName = string.IsNullOrWhiteSpace(destinationFileName)
 ? Path.GetFileName(sourceFilePath)
 : destinationFileName;

 File.Copy(sourceFilePath, Path.Combine(destinationFilePath, fileName));
}
</code></pre>
Tested on .NET Core 2.1

blocks|key|4003501|text|NET6+-可拓法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4003502|[DebuggerStepThrough]
public+static+FileInfo+CopyToDir(this+FileInfo+srcFile,+string+destDir)+=>
++++(srcFile+==+null+%7C%7C+!srcFile.Exists)+?+throw+new+ArgumentException($"The+specified+source+file+[{srcFile.FullName}]+does+not+exist",+nameof(srcFile))+:
++++(destDir+==+null+%7C%7C+!Directory.Exists(destDir))+?+throw+new+ArgumentException($"The+specified+destination+directory+[{destDir}]+does+not+exist",+nameof(destDir))+:
++++srcFile.CopyTo(Path.Combine(destDir,+srcFile.Name),+true);|code-block|syntax|javascript|4003503|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

NET6 - Extension method
<pre><code>[DebuggerStepThrough]
public static FileInfo CopyToDir(this FileInfo srcFile, string destDir) =&gt;
 (srcFile == null || !srcFile.Exists) ? throw new ArgumentException($&quot;The specified source file [{srcFile.FullName}] does not exist&quot;, nameof(srcFile)) :
 (destDir == null || !Directory.Exists(destDir)) ? throw new ArgumentException($&quot;The specified destination directory [{destDir}] does not exist&quot;, nameof(destDir)) :
 srcFile.CopyTo(Path.Combine(destDir, srcFile.Name), true);
</code></pre>

I am working on a project where I want to copy some files in one directory to a second already existing directory.

I can't find a way to simply copy from one folder to another. I can find copy file to a new file, or directory to a new directory.

The way I have my program set up right now is I copy the file and leave it in same directory, then move that copy to the directory that I want.

Edit:

Thanks everyone. All of your answers worked. I realized what I did wrong, when i set the destination path I didn't add a filename. Everything works now, Thanks for the super speedy responses.

Copy file to a different directory

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我正在处理一个项目，其中我希望将一个目录中的一些文件复制到另一个已经存在的目录中。我找不到简单地从一个文件夹复制到另一个文件夹的方法。我可以找到将文件复制到新文件，或将目录复制到新目录。我现在设置程序的方式是复制文件并将其放在相同的目录中，然后将副本移动到我想要的目录中。编辑：谢谢大家。你所有的答案都起作用了。我意识到我做错了什么，当我设置目标路径时，我没有添加文件名。现在一切都正常了，感谢你超快

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