在我的列表框的文件中有想要复制文件这些指定的路径,例如c:\或任何路径,但错误是(值不能为空参数名称路径)错误如何ı可以复制指定的路径ıwirte此代码< / p>
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();
}
答案 0 :(得分:1)
我认为问题在于:
string destinationfolder;
你声明一个空字符串,并尝试从什么获取DirectoryInfo?还有空字符串?抛出异常。你可以看到你的代码:
DirectoryInfo di = new DirectoryInfo("");
此代码始终为异常。 问题是:“destinationFolder”参数需要什么?
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);
}