从文件构造位图对象或图像对象时,文件在对象的生存期内保持锁定状态。因此,您无法更改图像并将其保存回其原始位置。http://support.microsoft.com/?id=814675
GDI +,JPEG图像到MemoryStream中发生一般错误
Image.Save(..)抛出GDI +异常,因为内存流已关闭
http://alperguc.blogspot.in/2008/11/c-generic-error-occurred-in- gdi.html
只是从内存写入…
保存到“中间”内存流,应该可以
例如尝试这个-替换
Bitmap newBitmap = new Bitmap(thumbBMP);
thumbBMP.Dispose();
thumbBMP = null;
newBitmap.Save("~/image/thumbs/" + "t" + objPropBannerImage.ImageId, ImageFormat.Jpeg);
与类似:
string outputFileName = "...";
using (MemoryStream memory = new MemoryStream())
{
using (FileStream fs = new FileStream(outputFileName, FileMode.Create, FileAccess.ReadWrite))
{
thumbBMP.Save(memory, ImageFormat.Jpeg);
byte[] bytes = memory.ToArray();
fs.Write(bytes, 0, bytes.Length);
}
}