/// <summary>
/// 图片缩放（外部调用该方法）
/// </summary>
/// <param name="filePath">源文件路径</param>
/// <param name="basetpath">缩略图保存路径</param>
/// <param name="fileName">文件名称</param>
/// <param name="targetWidth">图片宽度</param>
/// <param name="targetHeight">图片高度</param>
public static void ImageZoomAuto(string filePath, string ThumbnailPath, string fileName, double targetWidth = 200, double targetHeight = 134)
{
FileStream fs = null;
using (fs = new FileStream(filePath, FileMode.OpenOrCreate))
{
if (null == fs)
{
return;
}
if (!System.IO.Directory.Exists(ThumbnailPath))
{
System.IO.Directory.CreateDirectory(ThumbnailPath);
}
PTImage.ZoomAuto(fs, ThumbnailPath + fileName, targetWidth, targetHeight, string.Empty, string.Empty);
}
}
/// <summary>
/// 上传图片
/// </summary>
/// <param name="upImg">文件流</param>
/// <param name="maxSize">限制图片最大值kb</param>
/// <param name="maxWidth">像素最大宽度</param>
/// <param name="maxHeight">像素最大高度</param>
/// <param name="isThumbnail">是否生成缩略图(1：生成等比缩放的；2：不生成；3:生成非等比缩放的)</param>
/// <param name="targetWidth">缩略后的宽度</param>
/// <param name="targetHeight">缩略后的高度</param>
/// <returns></returns>
public static string UploadImg(ref string errorStr, HttpPostedFileBase upImg, int maxSize = 1000000, int maxWidth = 100000, int maxHeight = 100000, int isThumbnail = 2, double targetWidth = 50, double targetHeight = 50)
{
if (upImg == null || upImg.ContentLength == 0)
{
return("");
}
//验证文件格式
string allowedImage = "gif,img,imge";
if (!CheckFileType(upImg, allowedImage))
{
errorStr = "图片格式不正确！";
return("");
}
//验证文件大小
int ImageMaxSize = 2048;
if (!CheckFileSize(upImg, ImageMaxSize))
{
errorStr = "上传图片大小不能超过" + ImageMaxSize + "KB！";
return("");
}
//验证图片宽高
if (!CheckImgWidthAndHeight(upImg, maxWidth, maxHeight))
{
errorStr = "图片格式有误，请上传[" + maxWidth + "*" + maxHeight + "]以内的图片！";
return("");
}
//后缀
string extName = Path.GetExtension(upImg.FileName);
//文件名称
string fileName = GetNewFileName() + extName;
//文件保存Web相对路劲
string dirWebPath = "/upload/";
//文件保存物理绝对路劲
string dirAbsolutePath = DirFile.GetServerPath(dirWebPath);
try
{
//正式上传
Upload(upImg, dirAbsolutePath, fileName);
//缩略图保存路径
string ThumbnailAbsolutePath = dirAbsolutePath + "Thumbnail/";
if (isThumbnail == 1)
{
//生成缩略图片
PTImage.ImageZoomAuto(dirAbsolutePath + fileName, ThumbnailAbsolutePath, fileName, targetWidth, targetHeight);
}
else if (isThumbnail == 3)
{
PTImage.Compress(dirAbsolutePath + fileName, ThumbnailAbsolutePath, (int)targetWidth, (int)targetHeight);
}
return(dirWebPath + fileName);
}
catch (Exception ex)
{
return("");
}
}