using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO; /// <summary>
/// Summary description for UploadFile
/// </summary>
public class UploadFile
{
private string[] AllowFileType; //所允許的檔案類型
private double FileLength; //所允許的檔案大小(KB)
private string SavePath; //檔案的儲存路徑
private string SaveFile; //上傳後的檔案名稱
private string Error; //儲存錯誤資訊
private string FileExtesion; //上傳檔案的副檔名 /// <summary>
/// 建構函式
/// </summary>
/// <param name="allFileType">允許的檔案類型，多個以","分開</param>
/// <param name="fileLength">檔案大小</param>
/// <param name="savePath">儲存路徑</param>
public UploadFile(string allFileType, double fileLength, string savePath)
{
char[] sp = { ',' };
AllowFileType = allFileType.Split(sp);
FileLength = fileLength * 1024;
SavePath = savePath;
} /// <summary>
/// 返回產生的檔案名稱
/// </summary>
public string FileName
{
get
{
return SaveFile;
}
} /// <summary>
/// 返回出錯資訊
/// </summary>
public string ErrorMessage
{
get
{
return Error;
}
} /// <summary>
/// 根據SavePath,組建檔案名
/// </summary>
/// <returns></returns>
private string MakeFileName(string fileType,string fileName)
{
string file = this.SavePath + "\\" + DateTime.Now.ToString("yyMMddhhmmss") + fileName;
while (File.Exists(file))
{
file = this.SavePath + "\\" + DateTime.Now.ToString("yyMMddhhmmss") + fileName;
}
return file;
} /// <summary>
/// 檢查檔案類型
/// </summary>
/// <param name="fileEx">MIME內容</param>
/// <returns></returns>
private bool CheckFileExt(string fileEx)
{
bool result = false;
for (int i = 0; i < this.AllowFileType.Length; i++)
{
if (fileEx.IndexOf(this.AllowFileType[i].ToLower()) > -1)
{
result = true;
break;
}
}
return result;
} public bool UpLoad(System.Web.UI.WebControls.FileUpload file)
{
bool result = true;
try
{
//查看檔案長度
if (file.PostedFile.ContentLength > (this.FileLength))
{
this.Error = "檔案大小超出範允許的範圍！";
return false;
} string fileName = Path.GetFileName(file.PostedFile.FileName);
this.FileExtesion = Path.GetExtension(fileName); if (!CheckFileExt(this.FileExtesion.ToLower()))
{
this.Error = "檔案類型" + this.FileExtesion + "不允許！";
return false;
}
//取得要儲存的檔案名稱
string UpFile = this.MakeFileName(this.FileExtesion, fileName);
//儲存檔案
file.PostedFile.SaveAs(UpFile); //返迴文件名
this.SaveFile = Path.GetFileName(UpFile); }
catch (Exception e)
{
result = false;
this.Error = e.Message;
}
return result;
}
} |
