/// <summary>
/// 合并文件的方法
/// </summary>
private void StartMerge()
{
//清空ListView
lvwFileInfo.Items.Clear();
//清空进度条
prgSchedule.Value = 0;
//反序列化头文件对象
FileStream fs = new FileStream(txtHeadFile.Text, FileMode.Open);
BinaryFormatter bf = new BinaryFormatter();
HeadFile headFile = bf.Deserialize(fs) as HeadFile;
prgSchedule.Maximum = headFile.GetFileInfo().Length;
//获得所有文件片段的路径信息
Dictionary <String, String> dictionary = new Dictionary <String, String>();
String[] urls = Directory.GetFiles(txtHeadFile.Text.Substring(0, txtHeadFile.Text.LastIndexOf('\\') + 1), "*.binary");
foreach (Info fileInfo in headFile.GetFileInfo())
{
foreach (String url in urls)
{
if (fileInfo.FileName.Equals(url.Substring(url.LastIndexOf('\\') + 1)))
{
//建立文件名和路径的映射
dictionary.Add(fileInfo.FileName, url);
break;
}
}
}
//校检文件完整性
if (CheckFile(headFile, dictionary))
{
AddInfo("文件校检成功，开始合并文件 - - - - - >");
//创建文件写入流
FileStream fileStream = new FileStream(txtFileURL.Text + "\\" + headFile.Format, FileMode.OpenOrCreate, FileAccess.ReadWrite);
//创建二进制写入流
BinaryWriter binaryWriter = new BinaryWriter(fileStream);
foreach (Info info in headFile.GetFileInfo())
{
String url = dictionary[info.FileName];
FileStream fragmentFile = new FileStream(url, FileMode.Open, FileAccess.Read);
//创建二进制读取流
BinaryReader binaryReader = new BinaryReader(fragmentFile);
for (int rate = 0; rate < fragmentFile.Length;)
{
byte[] bytes = FillCache(binaryReader);
rate += bytes.Length;
binaryWriter.Write(bytes);
}
AddInfo("已合并文件：" + url);
prgSchedule.Value++;
}
AddInfo("文件合并完毕 - - - - - - >");
}
else
{
MessageBox.Show("文件校检失败：\n1.请检查-文件片段是否完整且都在同一文件夹下。\n2.检查-是否对文件片段有过重命名。", "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
/// <summary>
/// 文件完整性校检
/// </summary>
/// <param name="headFile">头文件对象</param>
/// <param name="hashtable">文件路径映射集合</param>
/// <returns>{true : 校检成功 , false : 校检失败}</returns>
private bool CheckFile(HeadFile headFile, Dictionary <String, String> dictionary)
{
bool check = true;
foreach (Info fileInfo in headFile.GetFileInfo())
{
String url = dictionary[fileInfo.FileName];
if (fileInfo.FileSize == new FileInfo(url).Length)
{
AddInfo("校检 " + url + " 成功");
}
else
{
AddInfo("校检 " + url + " 失败,大小不匹配");
check = false;
return(check);
}
}
return(check);
}
/// <summary>
/// 分割文件的方法
/// </summary>
/// <param name="mainFile">被分割文件的路径</param>
/// <param name="outURL">分割后文件的路径</param>
/// <param name="count">分割数量</param>
private void StartDivision()
{
//清空ListView
lvwFileInfo.Items.Clear();
//创建指向用户选择文件的读取流
fileStream = new FileStream(fileURL, FileMode.Open);
//计算分割文件的数量并输出在ListView中
AddInfo("正在计算分割后文件的数量……");
int count = ComputingFileSize(cmbUnit.Text, fileStream.Length, (int)nudFileSize.Value);
AddInfo("分割后文件的数量为:" + count);
String outURL = txtFileOutURL.Text;
String fileName = txtFile.Text;
//创建头文件对象
headFile = new HeadFile(count);
headFile.Format = txtFile.Text;
//创建指向用户选择文件的读取流
binaryReader = new BinaryReader(fileStream);
for (int i = 1; i <= count; i++)
{
if (isStop)//安全退出该方法和线程
{
AddInfo("已终止操作 - - - - - - - - >");
fileStream.Close();
binaryReader.Close();
return;
}
long fileSize = i == count ? lastFileLenght : fileLenght;
//分割后文件的全称
String fileURL = outURL + "\\" + fileName.Substring(0, fileName.LastIndexOf('.')) + i + ".binary";
//加入信息到ListView中
AddInfo("创建文件:" + fileURL);
//二进制数据写入对象
using (BinaryWriter binaryWriter = new BinaryWriter(new FileStream(fileURL, FileMode.OpenOrCreate, FileAccess.ReadWrite)))
{
for (int rate = 0; !(rate == fileSize);)
{
byte[] bytes = FillCache(binaryReader);
//进行迭代计算
rate += bytes.Length;
//将缓存区的数据写入文件
binaryWriter.Write(bytes);
//添加信息进ListView中
//AddInfo("以写入数据：" + rate + " BB");
}
}
//添加信息到头文件中
headFile.AddFileInfo(new Info(fileName.Substring(0, fileName.LastIndexOf('.')) + i + ".binary", fileSize));
//进度条前进
prgSchedule.Value++;
}
//序列化头文件对象
String headFileURL = outURL + "\\" + fileName.Substring(0, fileName.LastIndexOf('.')) + ".head";
Stream fStream = new FileStream(headFileURL, FileMode.Create, FileAccess.ReadWrite);
BinaryFormatter binFormat = new BinaryFormatter();//创建二进制序列化器
binFormat.Serialize(fStream, headFile);
AddInfo("创建头文件" + headFileURL);
AddInfo("本次文件分解完毕……");
//释放资源
btnStop.Enabled = false;
fStream.Close();
fileStream.Close();
binaryReader.Close();
}
