怎样提高WebService的性能
服务器端WebService程序
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;
using System.IO.Compression;
using System.Data.SqlClient;
………
public class Service1 : System.Web.Services.WebService
{
[WebMethod(Description = "直接返回 DataSet 对象。")]
public DataSet GetNorthwindDataSet()
{
string sql = "SELECT * FROM DB";
SqlConnection conn = new SqlConnection("Server=60.28.25.58;DataBase=s168593;user id=s168593;password=*****;");
conn.Open();
SqlDataAdapter dataadapter = new SqlDataAdapter(sql, conn);
DataSet ds = new DataSet();
dataadapter.Fill(ds, "DB");
conn.Close();
return ds;
}
[WebMethod(Description = "返回 DataSet 对象用 Binary 序列化后的字节数组。")]
public byte[] GetDataSetBytes()
{
DataSet dataSet = GetNorthwindDataSet();
BinaryFormatter ser = new BinaryFormatter();
MemoryStream ms = new MemoryStream();
ser.Serialize(ms, dataSet);
byte[] buffer = ms.ToArray();
return buffer;
}
[WebMethod(Description = "返回 DataSetSurrogate 对象用 Binary 序列化后的字节数组。")]
public byte[] GetDataSetSurrogateBytes()
{
DataSet dataSet = GetNorthwindDataSet();
DataSetSurrogate dss = new DataSetSurrogate(dataSet);
BinaryFormatter ser = new BinaryFormatter();
MemoryStream ms = new MemoryStream();
ser.Serialize(ms, dss);
byte[] buffer = ms.ToArray();
return buffer;
}
[WebMethod(Description = "返回 DataSetSurrogate 对象用 Binary 序列化并 Zip 压缩后的字节数组。")]
public byte[] GetDataSetSurrogateZipBytes()
{
DataSet dataSet = GetNorthwindDataSet();
DataSetSurrogate dss = new DataSetSurrogate(dataSet);
BinaryFormatter ser = new BinaryFormatter();
MemoryStream ms = new MemoryStream();
ser.Serialize(ms, dss);
byte[] buffer = ms.ToArray();
byte[] zipBuffer = Compress(buffer);
return zipBuffer;
}
public byte[] Compress(byte[] data)
{
try
{
MemoryStream ms = new MemoryStream();
Stream zipStream = null;
zipStream = new GZipStream(ms, CompressionMode.Compress, true);
zipStream.Write(data, 0, data.Length);
zipStream.Close();
ms.Position = 0;
byte[] compressed_data = new byte[ms.Length];
ms.Read(compressed_data, 0, int.Parse(ms.Length.ToString()));
return compressed_data;
}
catch
{
return null;
}
}
}
客户端WebService程序
private void button1_Click(object sender, EventArgs e)
{
com.dzbsoft.www.Service1 ds = new com.dzbsoft.www.Service1();
DateTime dtBegin = DateTime.Now;
DataSet dataSet = ds.GetNorthwindDataSet();
this.label1.Text = string.Format("耗时：{0}", DateTime.Now - dtBegin);
binddata(dataSet);
}
private void button2_Click(object sender, EventArgs e)
{
com.dzbsoft.www.Service1 ds = new com.dzbsoft.www.Service1();
DateTime dtBegin = DateTime.Now;
byte[] buffer = ds.GetDataSetBytes();
BinaryFormatter ser = new BinaryFormatter();
DataSet dataSet = ser.Deserialize(new MemoryStream(buffer)) as DataSet;
this.label2.Text = string.Format("耗时：{0}", DateTime.Now - dtBegin) + " " + buffer.Length;
binddata(dataSet);
}
private void button3_Click(object sender, EventArgs e)
{
com.dzbsoft.www.Service1 ds = new com.dzbsoft.www.Service1();
DateTime dtBegin = DateTime.Now;
byte[] buffer = ds.GetDataSetSurrogateBytes();
BinaryFormatter ser = new BinaryFormatter();
DataSetSurrogate dss = ser.Deserialize(new MemoryStream(buffer)) as DataSetSurrogate;
DataSet dataSet = dss.ConvertToDataSet();
this.label3.Text = string.Format("耗时：{0}", DateTime.Now - dtBegin) + " " + buffer.Length;
binddata(dataSet);
}
private void button4_Click(object sender, EventArgs e)
{
com.dzbsoft.www.Service1 ds = new com.dzbsoft.www.Service1();
DateTime dtBegin = DateTime.Now;
byte[] zipBuffer = ds.GetDataSetSurrogateZipBytes();
byte[] buffer = UnZipClass.Decompress(zipBuffer);
BinaryFormatter ser = new BinaryFormatter();
DataSetSurrogate dss = ser.Deserialize(new MemoryStream(buffer)) as DataSetSurrogate;
DataSet dataSet = dss.ConvertToDataSet();
this.label4.Text = string.Format("耗时：{0}", DateTime.Now - dtBegin) + " " + zipBuffer.Length;
binddata(dataSet);
}
private void binddata(DataSet dataSet)
{
this.dataGridView1.DataSource = dataSet.Tables[0];
this.label5.Text = "共计：" + dataSet.Tables[0].Rows.Count + "条记录";
}
客户端UnZipClass程序
public static class UnZipClass
{
public static byte[] Decompress(byte[] data)
{
try
{
MemoryStream ms = new MemoryStream(data);
Stream zipStream = null;
zipStream = new GZipStream(ms, CompressionMode.Decompress);
byte[] dc_data = null;
dc_data = ExtractBytesFromStream(zipStream, data.Length);
return dc_data;
}
catch
{
return null;
}
}
public static byte[] ExtractBytesFromStream(Stream zipStream, int dataBlock)
{
byte[] data = null;
int totalBytesRead = 0;
try
{
while (true)
{
Array.Resize(ref data, totalBytesRead + dataBlock + 1);
int bytesRead = zipStream.Read(data, totalBytesRead, dataBlock);
if (bytesRead == 0)
{
break;
}
totalBytesRead += bytesRead;
}
Array.Resize(ref data, totalBytesRead);
return data;
}
catch
{
return null;
}
}
}
