文件操作 File

貌似小白 2013-04-19

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文件操作 File

分類： Asp.Net 2009-08-03 11:57 89人閱讀評論(0) 收藏舉報

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[c-sharp] view plain copy ?

public class FileOperBase
{
/// <summary>
/// 路徑轉換（轉換成物理路徑）
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
public static string WebPathTran(string path)
{
try
{
return HttpContext.Current.Server.MapPath(path);
}
catch
{
return path;
}
}
}
------------------
/// <summary>
/// 文件信息
/// </summary>
public struct FileMessage
{
/// <summary>
/// 文件大小
/// </summary>
public int FileSize;
/// <summary>
/// 文件名
/// </summary>
public string FileName;
}
---------------------------
/// <summary>
/// 文件操作
/// </summary>
public class FileOper : FileOperBase
{
/// <summary>
/// 上傳文件（默認文件名）
/// </summary>
/// <param name="fileUploadControl">上傳控件ID</param>
/// <param name="SavePath">指定目錄相對路徑</param>
/// <param name="IsGuid">啟用Guid重命名</param>
/// <returns></returns>
public static FileMessage UploadFile(FileUpload fileUploadControl, string SavePath, bool IsGuid)
{
FileMessage Message = new FileMessage();
string filename = fileUploadControl.FileName;
if (IsGuid)
{
//Guid+擴展名
filename = System.Guid.NewGuid().ToString() + filename.Substring(filename.LastIndexOf("."));
}
try
{
string FileInServerName = WebPathTran(SavePath) + filename;
Message.FileSize = fileUploadControl.PostedFile.ContentLength;
Message.FileName = filename;
fileUploadControl.SaveAs(FileInServerName);
return Message;
}
catch (Exception ex)
{
throw ex;
}
}
/// <summary>
/// 文件下載
/// </summary>
/// <param name="filefullname">完整文件名相對路徑</param>
public static void DownLoadSmallFile(string filefullname)
{
HttpResponse response = HttpContext.Current.Response;
HttpRequest request = HttpContext.Current.Request;
string filepath = filefullname.Substring(0, filefullname.LastIndexOf("/") + 1);
string filename = filefullname.Remove(0, filepath.Length);
string Fileparentpath = WebPathTran(filepath);
try
{
if (File.Exists(Fileparentpath + "http://" + filename))
{
FileStream f = new FileStream(WebPathTran(filefullname), FileMode.Open, FileAccess.Read);
byte[] data = new byte[f.Length];
f.Read(data, 0, (int)f.Length);
response.Clear();
response.ClearHeaders();
response.Buffer = false;
response.ContentType = "application/octet-stream";
response.AddHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(filename, System.Text.Encoding.UTF8));
response.AppendHeader("Content-Length", data.Length.ToString());
f.Close();
response.BinaryWrite(data);
}
else
{
response.Redirect(request.ServerVariables["HTTP_REFERER"]);
}
}
catch (Exception ew) { response.Write(ew.Message); }
}
/// <summary>
/// 備份文件
/// </summary>
/// <param name="sourceFileName">源文件名物理路徑</param>
/// <param name="destFileName">目標文件名物理路徑</param>
/// <param name="overwrite">當目標文件存在時是否覆蓋</param>
/// <returns>操作是否成功</returns>
public static bool BackupFile(string sourceFileName, string destFileName, bool overwrite)
{
if (!System.IO.File.Exists(sourceFileName))
{
throw new FileNotFoundException(sourceFileName + "文件不存在！");
}
if (!overwrite && System.IO.File.Exists(destFileName))
{
return false;
}
try
{
System.IO.File.Copy(sourceFileName, destFileName, true);
return true;
}
catch (Exception e)
{
throw e;
}
}
/// <summary>
/// 備份文件,當目標文件存在時覆蓋
/// </summary>
/// <param name="sourceFileName">源文件名物理路徑</param>
/// <param name="destFileName">目標文件名物理路徑</param>
/// <returns>操作是否成功</returns>
public static bool BackupFile(string sourceFileName, string destFileName)
{
return BackupFile(sourceFileName, destFileName, true);
}
/// <summary>
/// 恢復文件
/// </summary>
/// <param name="backupFileName">備份文件名物理路徑 </param>
/// <param name="targetFileName">要恢復的文件名物理路徑</param>
/// <param name="backupTargetFileName">要恢復文件再次備份的名稱,如果為null,則不再備份恢復文件</param>
/// <returns>操作是否成功</returns>
public static bool RestoreFile(string backupFileName, string targetFileName, string backupTargetFileName)
{
try
{
if (!System.IO.File.Exists(backupFileName))
{
throw new FileNotFoundException(backupFileName + "文件不存在！");
}
if (backupTargetFileName != null)
{
if (!System.IO.File.Exists(targetFileName))
{
throw new FileNotFoundException(targetFileName + "文件不存在！無法備份此文件！");
}
else
{
System.IO.File.Copy(targetFileName, backupTargetFileName, true);
}
}
System.IO.File.Delete(targetFileName);
System.IO.File.Copy(backupFileName, targetFileName);
}
catch (Exception e)
{
throw e;
}
return true;
}
public static bool RestoreFile(string backupFileName, string targetFileName)
{
return RestoreFile(backupFileName, targetFileName, null);
}
/// <summary>
/// 文件刪除
/// </summary>
/// <param name="parentPath">所在父級目錄</param>
/// <param name="filename">文件名</param>
/// <returns></returns>
public static bool DeleteFile(string parentPath, string filename)
{
try
{
string filefullname = WebPathTran(parentPath) + filename;
File.Delete(filefullname);
return true;
}
catch
{
return false;
}
}
/// <summary>
/// 文件刪除
/// </summary>
/// <param name="FilePath"></param>
/// <returns></returns>
public static bool DeleteFile(string FilePath)
{
FileInfo fi = new FileInfo(WebPathTran(FilePath));
if (fi.Exists)
{
try
{
fi.Delete();
return true;
}
catch
{
return false;
}
}
return true;
}
/// <summary>
/// 判斷文件是否存在
/// </summary>
/// <param name="FilePath"></param>
/// <returns></returns>
public static bool ExistsFile(string FilePath)
{
return File.Exists(WebPathTran(FilePath));
}
/// <summary>
/// 判斷文件夾是否存在
/// </summary>
/// <param name="Path"></param>
/// <returns></returns>
public static bool ExistsFold(string Path)
{
return Directory.Exists(WebPathTran(Path));
}
/// <summary>
/// 創(chuàng)建文件夾
/// </summary>
/// <param name="Path"></param>
public static void CreateFold(string Path)
{
Directory.CreateDirectory(WebPathTran(Path));
}
}