private Dictionary<int,Image> waveImages;
System.Drawing.Bitmap objPic,objNewPic;
objPic = (Bitmap)waveImages[index];//<----
objPic.Save("aaa.bmp");//图片正确,原图大小为47039*208
objNewPic=new System.Drawing.Bitmap(objPic,width,height);//这里出错!width=23519,height=208System.ArgumentException: 参数无效。
   在 System.Drawing.Graphics.CheckErrorStatus(Int32 status)
   在 System.Drawing.Graphics.DrawImage(Image image, Int32 x, Int32 y, Int32 width, Int32 height)
   在 System.Drawing.Bitmap..ctor(Image original, Int32 width, Int32 height)如果把箭头那行换成objPic=new System.Drawing.Bitmap(width,height);则能够通过。问题出在哪里?谢谢!