1.把上传的文件转换为字节数组
2.流转化为字节数组
2.上传文件根据FileUpload控件上传
3.把Byte流上传到指定目录并保存为文件

/// <summary>
/// 编 码 人：苏飞
/// 联系方式：361983679
/// 更新网站：[url=http://www.sufeinet.com/thread-655-1-1.html]http://www.sufeinet.com/thread-655-1-1.html[/url]
/// </summary>
using System;
using System.IO;
using System.Web;
using System.Web.UI.WebControls;namespace DotNet.Utilities
{/// <summary>/// 文件上传类/// </summary>public class FileUp{public FileUp(){ }/// <summary>/// 转换为字节数组/// </summary>/// <param name="filename">文件名</param>/// <returns>字节数组</returns>public byte[] GetBinaryFile(string filename){if (File.Exists(filename)){FileStream Fsm = null;try{Fsm = File.OpenRead(filename);return this.ConvertStreamToByteBuffer(Fsm);}catch{return new byte[0];}finally{Fsm.Close();}}else{return new byte[0];}}/// <summary>/// 流转化为字节数组/// </summary>/// <param name="theStream">流</param>/// <returns>字节数组</returns>public byte[] ConvertStreamToByteBuffer(System.IO.Stream theStream){int bi;MemoryStream tempStream = new System.IO.MemoryStream();try{while ((bi = theStream.ReadByte()) != -1){tempStream.WriteByte(((byte)bi));}return tempStream.ToArray();}catch{return new byte[0];}finally{tempStream.Close();}}/// <summary>/// 上传文件/// </summary>/// <param name="PosPhotoUpload">控件</param>/// <param name="saveFileName">保存的文件名</param>/// <param name="imagePath">保存的文件路径</param>public string FileSc(FileUpload PosPhotoUpload, string saveFileName, string imagePath){string state = "";if (PosPhotoUpload.HasFile){if (PosPhotoUpload.PostedFile.ContentLength / 1024 < 10240){string MimeType = PosPhotoUpload.PostedFile.ContentType;if (String.Equals(MimeType, "image/gif") || String.Equals(MimeType, "image/pjpeg")){string extFileString = System.IO.Path.GetExtension(PosPhotoUpload.PostedFile.FileName);PosPhotoUpload.PostedFile.SaveAs(HttpContext.Current.Server.MapPath(imagePath));}else{state = "上传文件类型不正确";}}else{state = "上传文件不能大于10M";}}else{state = "没有上传文件";}return state;}/// <summary>/// 上传文件/// </summary>/// <param name="binData">字节数组</param>/// <param name="fileName">文件名</param>/// <param name="fileType">文件类型</param>//-------------------调用----------------------//byte[] by = GetBinaryFile("E:\\Hello.txt");//this.SaveFile(by,"Hello",".txt");//---------------------------------------------public void SaveFile(byte[] binData, string fileName, string fileType){FileStream fileStream = null;MemoryStream m = new MemoryStream(binData);try{string savePath = HttpContext.Current.Server.MapPath("~/File/");if (!Directory.Exists(savePath)){Directory.CreateDirectory(savePath);}string File = savePath + fileName + fileType;fileStream = new FileStream(File, FileMode.Create);m.WriteTo(fileStream);}finally{m.Close();fileStream.Close();}}}
}