//拷贝循环
private void copycircle()
{
if (topathnum < topaths.Length)
{
totalSize = 0;
position = 0;
topath = topaths[topathnum];
topath = FunctionUtils.AutoCreateFolder(topath);
if (topath != null)
{
try {
var fs = new FileStream(frompath, FileMode.Open, FileAccess.Read);
totalSize = (int)fs.Length;
stream = fs;
} catch (Exception) {
MessageBox.Show("读取文件失败：" + frompath, "提示");
return;
}
if (File.Exists(topaths[topathnum] + "/" + filename))
{
File.Delete(topaths[topathnum] + "/" + filename);
}
if (totalSize < BUFFER_SIZE)
{
BUFFER_SIZE = totalSize;
}
buffer = new byte[BUFFER_SIZE];
stream.BeginRead(buffer, 0, BUFFER_SIZE, new AsyncCallback(AsyncCopyFile), null);
}
else
{
MessageBox.Show("文件路径不存在，尝试创建路径失败", "提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
topathnum++;
copycircle();
}
}
}