using system;
using system.collections.generic;
using system.linq;
using system.text;
using system.data;
using system.runtime.serialization.formatters.binary;
using system.io;
using system.io.compression;
using system.runtime.serialization;
namespace commonclass
{
class serializeutilty
/// <summary>
/// 序列化object對象并壓縮
/// </summary>
/// <param name="ds"></param>
public static string serializerandcompression(object obj)
iformatter formatter = new binaryformatter();//定義binaryformatter以序列化object對象
memorystream ms = new memorystream();//建立記憶體流對象
string serfilename = obj.gettype().name + ".dat";//序列化後檔案的名字
formatter.serialize(ms, obj);//把object對象序列化到記憶體流
byte[] buffer = ms.toarray();//把記憶體流對象寫入位元組數組
ms.close();//關閉記憶體流對象
ms.dispose();//釋放資源
filestream fs = file.create(serfilename);//建立檔案
gzipstream gzipstream = new gzipstream(fs, compressionmode.compress, true);//建立壓縮對象
gzipstream.write(buffer, 0, buffer.length);//把壓縮後的資料寫入檔案
gzipstream.close();//關閉壓縮流,這裡要注意:一定要關閉,要不然解壓縮的時候會出現小于4k的檔案讀取不到資料,大于4k的檔案讀取不完整
gzipstream.dispose();//釋放對象
fs.close();//關閉流
fs.dispose();//釋放對象
return serfilename;
}
/// 反序列化壓縮的object
/// <param name="_filepath"></param>
/// <returns></returns>
public static object deserializeanddecompress(string _filepath)
filestream fs = file.openread(_filepath);//打開檔案
fs.position = 0;//設定檔案流的位置
gzipstream gzipstream = new gzipstream(fs, compressionmode.decompress);//建立解壓對象
byte[] buffer = new byte[4096];//定義資料緩沖
int offset = 0;//定義讀取位置
memorystream ms = new memorystream();//定義記憶體流
while ((offset = gzipstream.read(buffer, 0, buffer.length)) != 0)
ms.write(buffer, 0, offset);//解壓後的資料寫入記憶體流
binaryformatter sfformatter = new binaryformatter();//定義binaryformatter以反序列化object對象
ms.position = 0;//設定記憶體流的位置
object obj;
try
obj = (object)sfformatter.deserialize(ms);//反序列化
catch
throw;
finally
ms.close();//關閉記憶體流
fs.close();//關閉檔案流
fs.dispose();//釋放資源
gzipstream.close();//關閉解壓縮流
gzipstream.dispose();//釋放資源
return obj;
/// 不壓縮直接序列化obj
public static string serializer(object obj)
formatter.serialize(fs, obj);//把object對象序列化到檔案
/// 反序列化未壓縮的object
public static object deserialize(string _filepath)
obj = (object)sfformatter.deserialize(fs);//反序列化
fs.close();//關閉記憶體流