[英]copy multiple files from listbox to specified folder
there are in the files of my listbox ı want copy files these specified path for example c:\\ or any path but error be (value cannot be null parameter name path) error how ı can copy specified path ı wirte this code 我的列表框的文件中有ı想复制这些指定的路径,例如c:\\或任何路径,但错误是(值不能为null参数名称路径)错误ı如何复制指定的路径ı将此代码
string source, fileToCopy, target;
string sourcefolder1;
string destinationfolder;
DirectoryInfo di = new DirectoryInfo(destinationfolder);
FileInfo[] annfiles;
foreach (string s in listBox1.Items)
{
fileToCopy = s;
source = Path.Combine(sourcefolder1, fileToCopy);
target = Path.Combine(destinationfolder, fileToCopy);
File.Copy(source, target);
annFiles = di.GetFiles();
}
I think the problem is here: 我认为问题出在这里:
string destinationfolder;
You declare an empty string and after try to get DirectoryInfo from what? 您声明一个空字符串,然后尝试从中获取DirectoryInfo? And Empty string? 和空字符串? This thrown an Exception. 这引发了异常。 You can see your code like this: 您可以看到这样的代码:
DirectoryInfo di = new DirectoryInfo("");
This code throw always an Exception. 此代码始终抛出异常。 The question is: what you need in "destinationFolder" parameter? 问题是:在“ destinationFolder”参数中需要什么?
This is a sample file copy: 这是一个示例文件副本:
string sourceFolder = @"C:\Documents";
string destinationFolder = "@"C:\MyDocumentsCopy";
DirectoryInfo directory = new DirectoryInfo(sourceFolder);
FileInfo[] files = directory.GetFiles();
foreach(var file in files)
{
string destinationPath = Path.Combine(destinationFolder, file.Name);
File.Copy(file.Fullname, destinationPath);
}
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