//使用流的方式读取和写入
private void slice2()
{
SlicesFilesNames.Clear();
FileInfo fileInfo = new FileInfo(SourceFilePath);
string foler = fileInfo.DirectoryName;
string fileName = fileInfo.Name;
long sourceFileSize = fileInfo.Length;
//long currentFileSize = 0;
long bufferSize = 1024 * 1024;
int fileIndex = 0;
bool isLastSlice = false;
while (true)
{
string sliceFilePath = Path.Combine(foler, fileName + "_" + fileIndex + "." + _sourceFileExtention);
long startPosition = fileIndex * SliceFileSize;
isLastSlice = (fileIndex + 1) * SliceFileSize >= sourceFileSize;
readAndWriteOneSlice(sliceFilePath, bufferSize, startPosition, isLastSlice);
fileIndex++;
//currentFileSize += SliceFileSize;
if (isLastSlice)
{
break;
}
}
}
//分隔或切片
//使用流的方式读取，然后一次性写入。
private void slice()
{
SlicesFilesNames.Clear();
FileInfo fileInfo = new FileInfo(SourceFilePath);
long fileSize = fileInfo.Length;
//Debug.WriteLine(fileSize);
//Debug.WriteLine(_sourceFileExtention);
string foler = fileInfo.DirectoryName;
string fileName = fileInfo.Name;
//Debug.WriteLine(foler);
using (FileStream fsRead = new FileStream(SourceFilePath, FileMode.Open, FileAccess.Read))
{
int index = 1;
while (true)
{
//byte[] buffer = new byte[SliceFileSize * 1024];
byte[] buffer = new byte[1024 * 1024];
int n = fsRead.Read(buffer, 0, buffer.Length);
//Debug.WriteLine("n=" + n);
if (n == 0)
{
break;
}
string outputFilePath = Path.Combine(foler, fileName + "_" + index + "." + _sourceFileExtention);
SlicesFilesNames.Add(outputFilePath);
//Debug.WriteLine("output file path=" + outputFilePath);
File.WriteAllBytes(outputFilePath, buffer.Take(n).ToArray());
index++;
//Debug.WriteLine("loop=" + end);
}
}
}
