その時点で画像を保存しようとしたときに、server.mappath()へのimgpathsを使用しました
が、GDI+エラーで一般的なエラーが発生しました。
Graphics Grfx = Graphics.FromImage(bitmap);
Grfx.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
Grfx.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
Grfx.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
Grfx.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
Grfx.DrawImage(bitmap, 0, 0, wb.Width, wb.Height);
using (Bitmap img = bitmap.Clone() as Bitmap)
{
Bitmap newimage = img.Clone(new System.Drawing.Rectangle(0, 0, bitmap.Width, bitmap.Height), img.PixelFormat);
newimage.Save(imgpaths, System.Drawing.Imaging.ImageFormat.Jpeg); //Error:A generic error occurred in GDI+.
}
wb.Dispose();