“文件(F)”->“新建項目(P)...”打開新建項目對話框。在左側的“項目類型”中選擇“WCF”，然後再在右側的“模板”中選擇“WCF服務庫”。
在下面的“名稱”文本框中，填寫我們要創建的WCF服務庫的項目名稱“Wcf_MassData”。
點擊確定，會創建出我們的WCF服務庫項目，在解決方案中會自動爲我們生成兩個類文件“IService.cs”和“Service.cs”。這兩個類文件是兩個WCF示例文件，對我們開發沒有什麼用處，現在我們刪掉這兩個文件。
第二步：創建DataTransfers與IDataTransfers服務接口類
在“解決方案窗口”中，我們右擊Services項目名，選擇“添加”，再單擊“類”，在彈出的“添加新項”窗口中，選擇“類”，並在“名稱”文本框中寫入項名稱“IDataTransfers.cs”和“DataTransfers.cs”。
第三步：爲服務接口類編寫代碼
IDataTransfers.cs代碼：
using System;using System.Collections.Generic;using System.Linq;using System.Runtime.Serialization;using System.ServiceModel;using System.Text;namespace Wcf_MassData
{ [ServiceContract] public interface IDataTransfers { /// <summary> /// 獲取所用壓縮後字節流 /// </summary> /// <returns></returns> [OperationContract] byte[] GetAllBuffer();/// <summary>
/// 設置壓縮後字節流分塊，每一塊的大小 /// </summary> /// <param name="length"></param> [OperationContract] void SetBufferLength(int length);/// <summary>
/// 讀取壓縮後字節流一塊，並提升字節流的位置 /// </summary> /// <returns></returns> [OperationContract] bool ReadNextBuffer();/// <summary>
/// 獲取當前塊的字節流 /// </summary> /// <returns></returns> [OperationContract] byte[] GetCurrentBuffer(); }}
DataTransfers.cs代碼：
using System;using System.Data;using System.Runtime.Serialization;using System.Runtime.Serialization.Formatters.Binary;using System.IO;using System.IO.Compression;using System.Collections.Generic;using System.Linq;using System.ServiceModel;using System.Text;namespace Wcf_MassData
{ public class DataTransfers : IDataTransfers { /// <summary> /// 無參數構造函數 /// </summary> public DataTransfers() {InitBuffers(InitTestDataSet());
}private byte[] buffer_all = null;
private byte[] buffer_currect = null; private int get_buffer_length = 1000; private long remain_length; private MemoryStream stream; /// <summary> /// 生成一個測試的數據集 /// </summary> /// <returns></returns> private DataSet InitTestDataSet() { DataSet ds = new DataSet("test"); DataTable table = new DataTable("test"); DataColumn column = new DataColumn("test"); column.DataType = Type.GetType("System.String"); table.Columns.Add(column); DataRow row; for (int i = 0; i < 10000; i++) { row = table.NewRow(); row["test"] = "測試數據 "+(i+1); table.Rows.Add(row); }ds.Tables.Add(table);
return ds;
}
/// <summary> /// 初始化壓縮字節流 /// </summary> /// <param name="ds"></param> private byte[] InitBuffers(DataSet ds) {IFormatter formatter = new BinaryFormatter();
MemoryStream stream_ = new MemoryStream(); formatter.Serialize(stream_, ds); buffer_all = stream_.ToArray(); stream_.Close(); byte[] bytes_c = Compression(buffer_all, CompressionMode.Compress); stream = new MemoryStream(bytes_c); stream.Position = 0; remain_length = stream.Length; return bytes_c; } /// <summary> /// 提供內部使用壓縮字流的方法 /// </summary> /// <param name="data"></param> /// <param name="mode"></param> /// <returns></returns> private byte[] Compression(byte[] data, CompressionMode mode) { DeflateStream zip = null; try { if (mode == CompressionMode.Compress) { MemoryStream ms = new MemoryStream(); zip = new DeflateStream(ms, mode, true); zip.Write(data, 0, data.Length); zip.Close(); return ms.ToArray(); } else { MemoryStream ms = new MemoryStream(); ms.Write(data, 0, data.Length); ms.Flush(); ms.Position = 0; zip = new DeflateStream(ms, mode, true); MemoryStream os = new MemoryStream(); int SIZE = 1024; byte[] buf = new byte[SIZE]; int l = 0; do { l = zip.Read(buf, 0, SIZE); if (l == 0) l = zip.Read(buf, 0, SIZE); os.Write(buf, 0, l); } while (l != 0); zip.Close(); return os.ToArray(); } } catch { if (zip != null) zip.Close(); return null; } finally { if (zip != null) zip.Close(); } }IDataTransfers 成員#region IDataTransfers 成員
/// <summary> /// 獲取所有字節流 /// </summary> /// <returns></returns> public byte[] GetAllBuffer() { if (buffer_all != null) return buffer_all; else return null; } /// <summary> /// 設置壓縮後字節流分塊，每一塊的大小 /// </summary> /// <param name="length"></param> public void SetBufferLength(int length) { this.get_buffer_length = length; } /// <summary> /// 讀取壓縮後字節流一塊，並提升字節流的位置 /// </summary> /// <returns></returns> public bool ReadNextBuffer() { bool bo; if (remain_length > 0) { if (remain_length > get_buffer_length) { buffer_currect = new byte[get_buffer_length];stream.Read(buffer_currect, 0, get_buffer_length);
remain_length -= get_buffer_length; } else { buffer_currect = new byte[remain_length]; stream.Read(buffer_currect, 0, (int)remain_length); remain_length = 0; }bo = true;
} else bo = false; return bo;}
/// <summary> /// 獲取當前塊的字節流 /// </summary> /// <returns></returns> public byte[] GetCurrentBuffer() { //if (buffer_currect != null) // return buffer_currect; //else // return null; DataSet ds = InitTestDataSet(); byte[] b = InitBuffers(ds); return b; } #endregion }}