sbinarycopy.aspx.cs

C#实现的文件流操作,很适合初学者对于基本方法的理解和学习,程序虽简单,却也说明问题.

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.IO;
namespace AspFileOp
{
	/// <summary>
	/// SBinaryCopy 的摘要说明。
	/// </summary>
	public class SBinaryCopy : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.Label Label2;
		protected System.Web.UI.WebControls.Label Label3;
		protected System.Web.UI.WebControls.Button btnCopy;
		protected System.Web.UI.HtmlControls.HtmlInputFile FileSelect;
		protected System.Web.UI.WebControls.TextBox tbDes;
		protected System.Web.UI.WebControls.Label lbInfo;
		protected System.Web.UI.WebControls.Label Label1;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN：该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.btnCopy.Click += new System.EventHandler(this.btnCopy_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void btnCopy_Click(object sender, System.EventArgs e)
		{
			string OriginFile = FileSelect.PostedFile.FileName;
			string NewFile	 = tbDes.Text +"\\"+Path.GetFileName(OriginFile);
		
			//下面开始操作

			//建立两个FileStream对象
			FileStream fsOF = new FileStream(OriginFile,FileMode.Open,FileAccess.Read);
			FileStream fsNF = new FileStream(NewFile,FileMode.Create,FileAccess.Write);

			//建立分别建立一个读写类
			BinaryReader br = new BinaryReader(fsOF);
			BinaryWriter bw = new BinaryWriter(fsNF);

			//将读取文件流指针指向流的头部
			br.BaseStream.Seek(0,SeekOrigin.Begin);
			//将写入文件流指针指向流的尾部
			bw.BaseStream.Seek(0,SeekOrigin.End);
	
			while(br.BaseStream.Position < br.BaseStream.Length)
			{
				//从br流中读取一个Byte并马上写入bw流
				bw.Write(br.ReadByte());
			}
	
			br.Close();
			bw.Close();
			//操作后判断源文件是否存在
			
			if(File.Exists(NewFile))
			{
				lbInfo.Text = "附件复制成功！";
			}
			else 
			{
				lbInfo.Text = "文件复制失败!";
			}
		}
	}
}