/**//// <summary>
/// 获取100*100缩略图像(不存在则返回默认图像,或者null)
/// </summary>
/// <param name="fileName">图片文件名</param>
/// <returns></returns>
public static Bitmap getMicroImage(string fileName)
...{
Bitmap bmp = getImage(fileName);
bmp = ResizeImage(bmp, 100, 100);
return bmp;
}
/**//// <summary>
/// Resize图片(不成功返回null)
/// </summary>
/// <param name="bmp">原始Bitmap</param>
/// <param name="newW">新的宽度</param>
/// <param name="newH">新的高度</param>
/// <returns>处理以后的图片</returns>
public static Bitmap ResizeImage(Bitmap bmp, int newW, int newH)
...{
try
...{
if (bmp.Width == newW && bmp.Height == newH)
return bmp;
Bitmap b = new Bitmap(newW, newH);
Graphics g = Graphics.FromImage(b);
// 插值算法的质量
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);
g.Dispose();
return b;
}
catch
...{
return null;
}
}
/// 获取100*100缩略图像(不存在则返回默认图像,或者null)
/// </summary>
/// <param name="fileName">图片文件名</param>
/// <returns></returns>
public static Bitmap getMicroImage(string fileName)
...{
Bitmap bmp = getImage(fileName);
bmp = ResizeImage(bmp, 100, 100);
return bmp;
}
/**//// <summary>
/// Resize图片(不成功返回null)
/// </summary>
/// <param name="bmp">原始Bitmap</param>
/// <param name="newW">新的宽度</param>
/// <param name="newH">新的高度</param>
/// <returns>处理以后的图片</returns>
public static Bitmap ResizeImage(Bitmap bmp, int newW, int newH)
...{
try
...{
if (bmp.Width == newW && bmp.Height == newH)
return bmp;
Bitmap b = new Bitmap(newW, newH);
Graphics g = Graphics.FromImage(b);
// 插值算法的质量
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);
g.Dispose();
return b;
}
catch
...{
return null;
}
}