想到要如何壓縮資料檔案就查了一下
看了一堆高手的順便整理一下GZipStream程式
第一種方式：也是最簡單的方式慢慢延伸就是自己要的了
//壓縮
protected void Compress_Click1(object sender, EventArgs e)
{
//己經有確定要壓縮的檔案
FileStream sourceFile = File.OpenRead(@"C:\sample.xml");
//壓縮後的檔案名稱
FileStream destFile = File.Create(@"C:\sample.gz");
//開始
GZipStream compStream = new GZipStream(destFile, CompressionMode.Compress, true);
try
{
int theByte = sourceFile.ReadByte();
while (theByte != -1)
{
compStream.WriteByte((byte)theByte);
theByte = sourceFile.ReadByte();
}
}
finally
{
compStream.Flush();
compStream.Dispose();
sourceFile.Flush();
sourceFile.Dispose();
destFile.Flush();
destFile.Dispose();
}
}
//解壓縮
protected void Decompress_Click(object sender, EventArgs e)
{
//被壓縮後的檔案
FileStream sourceFile = File.OpenRead(@"C:\sample.gz");
//解壓縮後的檔案
FileStream destFile = File.Create(@"C:\Unsample.xml");
//開始
GZipStream compStream = new GZipStream(sourceFile, CompressionMode.Decompress, true);
try
{
int theByte = compStream.ReadByte();
while (theByte != -1)
{
destFile.WriteByte((byte)theByte);
theByte = compStream.ReadByte();
}
}
finally
{
compStream.Flush();
compStream.Dispose();
sourceFile.Flush();
sourceFile.Dispose();
destFile.Flush();
destFile.Dispose();
}
}
第二種方式：別人寫的小改了一些些....比較完整方便
protected void Compress_Click(object sender, EventArgs e)
{
string strPath, strReadTextContent;
strPath = Server.MapPath("TestFile");
strReadTextContent = "我是測試資料我是測試資料我是測試資料";
if (!Directory.Exists(strPath))
Directory.CreateDirectory(strPath);
//讀取檔案內容
//string strReadTextContent = File.ReadAllText(Server.MapPath("TestFile/TextFile.txt"));
CompressToFile(Server.MapPath("TestFile/TextFile.gz"), strReadTextContent);
}
public void CompressToFile(string strCompressFileName, string strFileContent)
{
try
{
//建立一個暫存的檔案
string tempFilePath = Path.GetTempFileName();
byte[] b;
//將指定的資料寫入暫存檔案中
File.WriteAllText(tempFilePath, strFileContent, System.Text.Encoding.UTF8);
//開啟建立的暫存檔將資料全部讀取
using (FileStream f_ReadTempFileContent = new FileStream(tempFilePath, FileMode.Open, FileAccess.Read))
{
b = new byte[f_ReadTempFileContent.Length];
f_ReadTempFileContent.Read(b, 0, (int)f_ReadTempFileContent.Length);
}
//建立strCompressFileName檔案
using (FileStream f_CompressFileName = new FileStream(strCompressFileName, FileMode.Create))
{
//開始進行壓縮
using (GZipStream zip = new GZipStream(f_CompressFileName, CompressionMode.Compress, false))
{
zip.Write(b, 0, b.Length);
}
}
}
catch (Exception ex)
{
Page.ClientScript.RegisterStartupScript(this.GetType(), "PopupScript", "alert('Error：" + ex.ToString() + "');", true);
}
Page.ClientScript.RegisterStartupScript(this.GetType(), "PopupScript", "alert('完成壓縮');", true);
}
public void DecompressToFile(string strCompressFileName, string strDecompressFileName)
{
int bufferSize = 4096;
byte[] buffer = new byte[bufferSize];
try
{
//讀取壓縮的strCompressFileName檔案
using (FileStream fs_CompressFile = new FileStream(strCompressFileName, FileMode.Open, FileAccess.Read, FileShare.Read))
{
//建立一個解壓縮後的檔案路徑與名稱
using (FileStream fs_DecompressFile = new FileStream(strDecompressFileName, FileMode.Create, FileAccess.Write, FileShare.None))
{
//解壓縮strCompressFileName的檔案
using (GZipStream zip = new GZipStream(fs_CompressFile, CompressionMode.Decompress, true))
{
//讀取strCompressFileName中的壓縮檔內容，並寫入新建立的檔案中
int n = 0;
while ((n = zip.Read(buffer, 0, buffer.Length)) != 0)
{
fs_DecompressFile.Write(buffer, 0, n);
}
}
}
}
//刪除壓縮檔
File.Delete(strCompressFileName);
}
catch (Exception ex)
{
Page.ClientScript.RegisterStartupScript(this.GetType(), "PopupScript", "alert('Error：" + ex.ToString() + "');", true);
}
Page.ClientScript.RegisterStartupScript(this.GetType(), "PopupScript", "alert('完成解壓縮');", true);
}
第三種方式：也是人家寫的有可用在WebService不過我只是拿來參考小小小改寫了一下....
protected void btnCompress1_Click(object sender, EventArgs e)
{
try
{
byte[] da = ZipData();
MemoryStream input = new MemoryStream();
input.Write(da, 0, da.Length);
input.Position = 0;
GZipStream gzip = new GZipStream(input, CompressionMode.Decompress, true);
MemoryStream output = new MemoryStream();
byte[] buff = new byte[4096];
int read = -1;
read = gzip.Read(buff, 0, buff.Length);
while (read > 0)
{
output.Write(buff, 0, read);
read = gzip.Read(buff, 0, buff.Length);
}
gzip.Close();
byte[] rebytes = output.ToArray();
output.Close();
input.Close();
MemoryStream ms = new MemoryStream(rebytes);
DataSet ds = new DataSet();
ds.ReadXml(ms);
GridView1.DataSource = LoadData();
GridView1.DataBind();
}
catch (Exception ex)
{
Response.Write(ex.Message);
}
}
public byte[] ZipData()
{
DataSet ds = LoadData().Copy();
MemoryStream ms = new MemoryStream();
ds.WriteXml(ms);
Byte[] bytes = ms.ToArray();
int lenByte = bytes.Length;
MemoryStream compMs = new MemoryStream();
GZipStream compStream = new GZipStream(compMs, CompressionMode.Compress, true);
compStream.Write(bytes, 0, lenByte);
compStream.Close();
ms.Close();
compMs.Close();
byte[] zipData = compMs.ToArray();
return zipData;
}
protected void btnCompress2_Click(object sender, EventArgs e)
{
try
{
byte[] da = ZipDataSer();
MemoryStream input = new MemoryStream();
input.Write(da, 0, da.Length);
input.Position = 0;
GZipStream gzip = new GZipStream(input, CompressionMode.Decompress, true);
MemoryStream output = new MemoryStream();
byte[] buff = new byte[4096];
int read = -1;
read = gzip.Read(buff, 0, buff.Length);
while (read > 0)
{
output.Write(buff, 0, read);
read = gzip.Read(buff, 0, buff.Length);
}
gzip.Close();
byte[] rebytes = output.ToArray();
output.Close();
input.Close();
MemoryStream ms = new MemoryStream(rebytes);
BinaryFormatter bf = new BinaryFormatter();
object obj = bf.Deserialize(ms);
DataSet ds = (DataSet)obj;
GridView1.DataSource = ds.Tables[0];
GridView1.DataBind();
}
catch (Exception ex)
{
Response.Write(ex.Message);
}
}
public byte[] ZipDataSer()
{
DataSet ds = LoadData().Copy();
ds.RemotingFormat = SerializationFormat.Binary;
BinaryFormatter ser = new BinaryFormatter();
MemoryStream unMS = new MemoryStream();
ser.Serialize(unMS, ds);
byte[] bytes = unMS.ToArray();
int lenbyte = bytes.Length;
MemoryStream compMs = new MemoryStream();
GZipStream compStream = new GZipStream(compMs, CompressionMode.Compress, true);
compStream.Write(bytes, 0, lenbyte);
compStream.Close();
unMS.Close();
compMs.Close();
byte[] zipData = compMs.ToArray();
return zipData;
}
private DataSet LoadData()
{
DataSet ds = new DataSet();
DataTable dt = new DataTable("testCompress");
dt.Columns.Add("序號", typeof(int));
dt.Columns.Add("價格", typeof(string));
dt.Columns.Add("編碼", typeof(string));
dt.Columns.Add("日期", typeof(DateTime));
Random rm = new Random();
for (int i = 0; i < 100; i++)
{
DataRow dw = dt.NewRow();
dw["序號"] = i;
dw["價格"] = rm.Next(1, 1000);
dw["編碼"] = Guid.NewGuid().ToString();
dw["日期"] = DateTime.Now.ToString();
dt.Rows.Add(dw);
}
ds.Tables.Add(dt);
ds.AcceptChanges();
return ds;
}
第四種方式:
//壓縮
public void GZipCompressString()
{
string rawString = "這是測試壓縮用資料";
byte[] rawData = System.Text.Encoding.UTF8.GetBytes(rawString.ToString());
byte[] zippedData = Compress(rawData);
Response.Write(Convert.ToBase64String(zippedData)).ToString();
}
private static byte[] Compress(byte[] rawData)
{
MemoryStream ms = new MemoryStream();
GZipStream compressedzipStream = new GZipStream(ms, CompressionMode.Compress, true);
compressedzipStream.Write(rawData, 0, rawData.Length);
compressedzipStream.Close();
return ms.ToArray();
}
//解壓縮
public void GZipDecompressString(string zippedString)
{
if (string.IsNullOrEmpty(zippedString) || zippedString.Length == 0)
Page.ClientScript.RegisterStartupScript(this.GetType(), "PopupScript", "alert('字串是空的!!');", true);
else
{
byte[] zippedData = Convert.FromBase64String(zippedString.ToString());
Response.Write(System.Text.Encoding.UTF8.GetString(Decompress(zippedData)));
}
}
private static byte[] Decompress(byte[] zippedData)
{
MemoryStream ms = new MemoryStream(zippedData);
GZipStream compressedzipStream = new GZipStream(ms, CompressionMode.Decompress);
MemoryStream outBuffer = new MemoryStream();
byte[] block = new byte[1024];
while (true)
{
int bytesRead = compressedzipStream.Read(block, 0, block.Length);
if (bytesRead <= 0)
break;
else
outBuffer.Write(block, 0, bytesRead);
}
compressedzipStream.Close();
return outBuffer.ToArray();
}
以上參考自：
http://msdn.microsoft.com/en-us/library/system.io.compression.gzipstream.aspx
http://www.dotblogs.com.tw/jeff-yeh/archive/2008/04/16/2932.aspx
http://www.dotblogs.com.tw/dc690216/archive/2010/02/07/13515.aspx
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