/// <summary>
/// 保存远程文件到本地
/// </summary>
/// <param name="fileUri">URI地址</param>
/// <returns>上传后的路径</returns>
public string RemoteSaveAs(string fileUri)
{
WebClient client = new WebClient();
string fileExt = fileUri.LastIndexOf(".", StringComparison.Ordinal) == -1 ? "gif" : Utils.GetFileExt(fileUri);
string newFileName = Utils.GetGuidString() + "." + fileExt; //随机生成新的文件名
string upLoadPath = GetUpLoadPath(); //上传目录相对路径
string fullUpLoadPath = Utils.GetMapPath(upLoadPath); //上传目录的物理路径
string newFilePath = upLoadPath + newFileName; //上传后的路径
//检查上传的物理路径是否存在，不存在则创建
if (!Directory.Exists(fullUpLoadPath))
{
Directory.CreateDirectory(fullUpLoadPath);
}
try
{
client.DownloadFile(fileUri, fullUpLoadPath + newFileName);
//如果是图片，检查是否需要打水印
if (IsWaterMark(fileExt))
{
switch (watermarktype)
{
case 1:
WaterMark.AddImageSignText(newFilePath, newFilePath,
_config["watermarktext"], watermarkposition,
watermarkimgquality, _config["watermarkfont"], watermarkfontsize);
break;
case 2:
WaterMark.AddImageSignPic(newFilePath, newFilePath, _config["watermarkpic"], watermarkposition,
watermarkimgquality, watermarktransparency);
break;
}
}
}
catch
{
return(string.Empty);
}
client.Dispose();
return(newFilePath);
}
/// <summary>
/// 文件上传方法
/// </summary>
/// <param name="postedFile">文件流</param>
/// <param name="isThumbnail">是否生成缩略图</param>
/// <param name="isWater">是否打水印</param>
/// <returns>上传后文件信息</returns>
public string FileSaveAs(HttpPostedFile postedFile, bool isThumbnail, bool isWater)
{
try
{
string fileExt = Utils.GetFileExt(postedFile.FileName); //文件扩展名，不含“.”
int fileSize = postedFile.ContentLength; //获得文件大小，以字节为单位
string fileName = postedFile.FileName.Substring(postedFile.FileName.LastIndexOf(@"\", StringComparison.Ordinal) + 1); //取得原文件名
string newFileName = Utils.GetGuidString() + "." + fileExt; //随机生成新的文件名
string newThumbnailFileName = "thumb_" + newFileName; //随机生成缩略图文件名
string upLoadPath = GetUpLoadPath(); //上传目录相对路径
string fullUpLoadPath = Utils.GetMapPath(upLoadPath); //上传目录的物理路径
string newFilePath = upLoadPath + newFileName; //上传后的路径
string newThumbnailPath = upLoadPath + newThumbnailFileName; //上传后的缩略图路径
//检查文件扩展名是否合法
if (!CheckFileExt(fileExt))
{
return("{\"status\": 0, \"msg\": \"不允许上传" + fileExt + "类型的文件！\"}");
}
//检查文件大小是否合法
if (!CheckFileSize(fileExt, fileSize))
{
return("{\"status\": 0, \"msg\": \"文件超过限制的大小！\"}");
}
//检查上传的物理路径是否存在，不存在则创建
if (!Directory.Exists(fullUpLoadPath))
{
Directory.CreateDirectory(fullUpLoadPath);
}
//保存文件
postedFile.SaveAs(fullUpLoadPath + newFileName);
//如果是图片，检查图片是否超出最大尺寸，是则裁剪
if (IsImage(fileExt))
{
Thumbnail.MakeThumbnailImage(fullUpLoadPath + newFileName, fullUpLoadPath + newFileName,
imgmaxwidth, imgmaxheight);
}
//如果是图片，检查是否需要生成缩略图，是则生成
if (IsImage(fileExt) && isThumbnail && thumbnailwidth > 0 && thumbnailheight > 0)
{
Thumbnail.MakeThumbnailImage(fullUpLoadPath + newFileName, fullUpLoadPath + newThumbnailFileName,
thumbnailwidth, thumbnailheight, "Cut");
}
else
{
newThumbnailPath = newFilePath; //不生成缩略图则返回原图
}
//如果是图片，检查是否需要打水印
if (IsWaterMark(fileExt) && isWater)
{
switch (watermarktype)
{
case 1:
WaterMark.AddImageSignText(newFilePath, newFilePath,
_config["watermarktext"], watermarkposition,
watermarkimgquality, _config["watermarkfont"], watermarkfontsize);
break;
case 2:
WaterMark.AddImageSignPic(newFilePath, newFilePath,
_config["watermarkpic"], watermarkposition,
watermarkimgquality, watermarktransparency);
break;
}
}
//处理完毕，返回JOSN格式的文件信息
return("{\"status\": 1, \"msg\": \"上传文件成功！\", \"name\": \""
+ fileName + "\", \"path\": \"" + newFilePath + "\", \"thumb\": \""
+ newThumbnailPath + "\", \"size\": " + fileSize + ", \"ext\": \"" + fileExt + "\"}");
}
catch
{
return("{\"status\": 0, \"msg\": \"上传过程中发生意外错误！\"}");
}
}
