C# Upload

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Web;
using Bo_myCommon;public class Upload
{
#region 上传图片 /// <summary>
/// 上传图片
/// </summary>
/// <param name="imgBuffer">字节数组</param>
/// <param name="uploadpath">保存路径。绝对或虚拟路径</param>
/// <param name="imgformat">图片保存格式</param>
/// <returns>上传成功后返回的新的文件名</returns>
public static string UploadImage(byte[] imgBuffer, string uploadpath, ImageFormat imgformat)
{
try
{
System.IO.MemoryStream m = new MemoryStream(imgBuffer); if (!Directory.Exists(HttpContext.Current.Server.MapPath(uploadpath)))
Directory.CreateDirectory(HttpContext.Current.Server.MapPath(uploadpath)); string imgname = StringHelper.CreateIDCode() + "." + imgformat.ToString().ToLower(); string _path = HttpContext.Current.Server.MapPath(uploadpath) + imgname; Image img = System.Drawing.Image.FromStream(m);
img.Save(_path, imgformat);
m.Close(); return uploadpath + imgname;
}
catch (Exception ex)
{
return ex.Message;
}
} /// <summary>
/// 上传图片
/// </summary>
/// <param name="stream">Stream</param>
/// <param name="uploadpath">保存路径。绝对或虚拟路径</param>
/// <param name="imgformat">图片保存格式</param>
/// <returns>上传成功后返回的新的文件名</returns>
public static string UploadImage(Stream stream, string uploadpath, ImageFormat imgformat)
{
try
{
Image img = Image.FromStream(stream);
string filename = StringHelper.CreateIDCode() + "." + imgformat.ToString().ToLower();
filename = HttpContext.Current.Server.MapPath(uploadpath) + filename;
img.Save(filename, imgformat);
return filename;
}
catch (Exception ex)
{
return ex.Message;
}
} /// <summary>
/// 上传图片
/// </summary>
/// <param name="postfile">客户端上传的文件</param>
/// <param name="uploadpath">保存地址</param>
/// <param name="imgformat">图片格式</param>
/// <returns></returns>
public static string UploadImage(HttpPostedFile postfile, string uploadpath, ImageFormat imgformat)
{
switch (imgformat.ToString().ToLower())
{
case "jpeg":
return UploadImageForJPEG(postfile, uploadpath);
case "bmp":
return UploadImageForBMP(postfile, uploadpath);
case "png":
return UploadImageForPNG(postfile, uploadpath);
case "gif":
return UploadImageForGIF(postfile, uploadpath);
default:
return UploadImageForJPEG(postfile, uploadpath);
}
} /// <summary>
/// 上传图片，保存为JPEG格式
/// </summary>
/// <param name="postfile">HttpPostedFile</param>
/// <param name="uploadpath">保存文件地址</param>
/// <returns>返回上传后的路径</returns>
public static string UploadImage(HttpPostedFile postfile, string uploadpath, bool autoImageName)
{
if (autoImageName)
{
switch (Path.GetExtension(postfile.FileName).ToLower())
{
case ".jpg":
return UploadImageForJPEG(postfile, uploadpath);
case ".gif":
return UploadImageForGIF(postfile, uploadpath);
case ".png":
return UploadImageForPNG(postfile, uploadpath);
default:
return UploadImageForJPEG(postfile, uploadpath);
}
}
else
{
Image img = Image.FromStream(postfile.InputStream);
ImageHelper.ZoomAuto(postfile, uploadpath, img.Width, img.Height, "", "", null);
return uploadpath;
}
} /// <summary>
/// 自动生成新的图片名称
/// </summary>
/// <param name="postfile"></param>
/// <param name="uploadpath"></param>
/// <returns></returns>
public static string UploadImage(HttpPostedFile postfile, string uploadpath)
{
return UploadImage(postfile, uploadpath, true);
} #region 水印 #region 上传图片，不缩放，并添加文字水印 /// <summary>
/// 上传图片，不缩放，并添加文字水印
/// </summary>
/// <param name="postedfile">HTTPPOSTEDFILE</param>
/// <param name="uploadpath">保存的全路径，包括文件名</param>
/// <param name="text">水印文字</param>
/// <param name="waterTextFont">文字水印字体</param>
public static void UploadImageWithWaterText(HttpPostedFile postedfile, string uploadpath, string text, Font waterTextFont)
{
Image img = Image.FromStream(postedfile.InputStream);
ImageHelper.ZoomAuto(postedfile, uploadpath, img.Width, img.Height, text, "", waterTextFont);
} /// <summary>
/// 上传图片，不缩放，并添加文字水印
/// </summary>
/// <param name="postedfile">HTTPPOSTEDFILE</param>
/// <param name="uploadpath">保存的全路径，包括文件名</param>
/// <param name="text">水印文字</param>
public static void UploadImageWithWaterText(HttpPostedFile postedfile, string uploadpath, string text)
{
Image img = Image.FromStream(postedfile.InputStream);
ImageHelper.ZoomAuto(postedfile, uploadpath, img.Width, img.Height, text, "", null);
} #endregion 上传图片，不缩放，并添加文字水印 #region 上传图片，不缩放，并添加图片水印 /// <summary>
/// 上传图片，不缩放，并添加图片水印
/// </summary>
/// <param name="postedfile">源图</param>
/// <param name="uploadpath">保存的路径，包含上传后的文件名</param>
/// <param name="waterimg">水印图片的虚拟路径</param>
public static void UploadImageWithWaterImage(HttpPostedFile postedfile, string uploadpath, string waterimg)
{
Image img = Image.FromStream(postedfile.InputStream);
waterimg = HttpContext.Current.Server.MapPath(waterimg);
ImageHelper.ZoomAuto(postedfile, uploadpath, img.Width, img.Height, "", waterimg, null);
} #endregion 上传图片，不缩放，并添加图片水印 /// <summary>
/// 图片等比缩放
/// </summary>
/// <param name="postfile">源图</param>
/// <param name="uploadpath">保存路径及文件名</param>
/// <param name="width">宽度</param>
/// <param name="height">高度</param>
public static void CutImageAutoZoom(HttpPostedFile postfile, string uploadpath, int width, int height)
{
ImageHelper.ZoomAuto(postfile, uploadpath, width, height, "", "", null);
} #endregion 水印 private static byte[] GetPostFileByte(HttpPostedFile postfile)
{
int filelength = postfile.ContentLength;
byte[] buffer = new byte[filelength];
postfile.InputStream.Read(buffer, , filelength);
return buffer;
} private static string UploadImageForBMP(HttpPostedFile postfile, string uploadpath)
{
byte[] buffer = GetPostFileByte(postfile);
return UploadImage(buffer, uploadpath, ImageFormat.Bmp);
} private static string UploadImageForGIF(HttpPostedFile postfile, string uploadpath)
{
byte[] buffer = GetPostFileByte(postfile);
return UploadImage(buffer, uploadpath, ImageFormat.Gif);
} private static string UploadImageForJPEG(HttpPostedFile postfile, string uploadpath)
{
byte[] buffer = GetPostFileByte(postfile);
return UploadImage(buffer, uploadpath, ImageFormat.Jpeg);
} private static string UploadImageForPNG(HttpPostedFile postfile, string uploadpath)
{
byte[] buffer = GetPostFileByte(postfile);
return UploadImage(buffer, uploadpath, ImageFormat.Png);
} #endregion 上传图片 #region 上传任何文件 /// <summary>
/// 上传文件
/// </summary>
/// <param name="postfile">上传的原始文件</param>
/// <param name="uploadpath">保存地址,如：'/upload/images/aaaa.jpg'</param>
/// <returns>返回上传后的文件名</returns>
public static string UploadFile(HttpPostedFile postfile, string uploadpath)
{
try
{
string savepath = HttpContext.Current.Server.MapPath(uploadpath);
if (!Directory.Exists(uploadpath))
Directory.CreateDirectory(uploadpath); string ext = Path.GetExtension(postfile.FileName);
string filename = StringHelper.CreateIDCode() + ext;
if (uploadpath.IndexOf(ext) == -) //判断
{
savepath = savepath + filename;
}
postfile.SaveAs(savepath);
return uploadpath + filename;
}
catch (Exception ex)
{
return ex.Message;
}
} #endregion 上传任何文件
}