ファイルアクションヘルプクラス
13296 ワード
ファイルアクションヘルプクラス:
/// <summary>
///
/// </summary>
public class FileManager
{
/// <summary>
///
/// </summary>
private static string FileFolder = ConfigurationSettings.AppSettings["UploadFolder"];
/// <summary>
///
/// </summary>
private static string BaseFolder = HttpContext.Current.Server.MapPath("~/"+FileFolder);
/// <summary>
///
/// </summary>
private static string RootSite = ConfigurationSettings.AppSettings["RootSite"];
/// <summary>
///
/// </summary>
public static string FileBaseUrl = RootSite + "/" + FileFolder + "/";
/// <summary>
///
/// </summary>
/// <param name="file"></param>
/// <returns> url</returns>
public static string UploadFile(HttpPostedFileBase file)
{
string extension = Path.GetExtension(file.FileName);
if(string.IsNullOrEmpty(extension))
{
return string.Empty;
}
string childFolder = extension.Substring(1);
string folderName = Path.Combine(BaseFolder, childFolder);
CreateFile(folderName);
string fileName=Guid.NewGuid() + extension;
string fileFullName = Path.Combine(folderName, fileName);
CreateFileStream(fileFullName,file);
return childFolder + "/" + fileName;
}
/// <summary>
///
/// </summary>
/// <param name="fileFullName"></param>
/// <param name="file"></param>
public static void CreateFileStream(string fileFullName, HttpPostedFileBase file)
{
using (FileStream fs = new FileStream(fileFullName, FileMode.OpenOrCreate))
{
byte[] buffer = new byte[file.ContentLength];
file.InputStream.Read(buffer, 0, file.ContentLength);
fs.Write(buffer, 0, file.ContentLength);
fs.Flush();
fs.Close();
}
}
/// <summary>
///
/// </summary>
/// <param name="folderName"></param>
public static void CreateFile(string folderName)
{
DirectoryInfo di = new DirectoryInfo(folderName);
if (!di.Exists)
{
di.Create();
}
}
/// <summary>
///
/// </summary>
/// <param name="fileRelativePath">UploadFile </param>
public static void DeleteFile(string fileRelativePath)
{
if (string.IsNullOrEmpty(fileRelativePath ))
{
return;
}
string fileName = Path.Combine(BaseFolder, fileRelativePath);
FileInfo fi = new FileInfo(fileName);
if (fi.Exists)
{
fi.Delete();
}
}
/// <summary>
///
/// </summary>
/// <param name="fileRelativePath"> </param>
public static void DownLoadFile(string fileRelativePath)
{
string fileName = fileRelativePath.Substring(fileRelativePath.LastIndexOf('/'));
string filePath = Path.Combine(BaseFolder, fileRelativePath);
// FileInfo File ， using() ， fs.close()
if (!System.IO.File.Exists(filePath))
{
return;
}
FileStream fs = new FileStream(filePath, FileMode.OpenOrCreate);
int streamLength = (int)fs.Length;
byte[] buffer = new byte[streamLength];
fs.Read(buffer, 0, streamLength);
HttpContext.Current.Response.ContentType = "application/octet-stream";
HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename="+fileName+";");
////attachment ---
////inline ---
HttpContext.Current.Response.AddHeader("Content-Length", streamLength.ToString());
HttpContext.Current.Response.BinaryWrite(buffer);
fs.Close();
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.End();
}
}