enum?AnchorPosition
{
????Top
????Center
????Bottom
????Left
????Right
}

//1、按比例縮放圖片

static?Image?ScaleByPercent（Image?imgPhoto?int?Percent）
{
????float?nPercent?=?（（float）Percent/100）;
?
????int?sourceWidth?=?imgPhoto.Width;
????int?sourceHeight?=?imgPhoto.Height;
????int?sourceX?=?0;
????int?sourceY?=?0;
?
????int?destX?=?0;
????int?destY?=?0;?
????int?destWidth??=?（int）（sourceWidth?*?nPercent）;
????int?destHeight?=?（int）（sourceHeight?*?nPercent）;
?
????Bitmap?bmPhoto?=?new?Bitmap（destWidth?destHeight?
?????????????????????????????PixelFormat.Format24bppRgb）;
????bmPhoto.SetResolution（imgPhoto.HorizontalResolution?
????????????????????????????imgPhoto.VerticalResolution）;
?
????Graphics?grPhoto?=?Graphics.FromImage（bmPhoto）;
????grPhoto.InterpolationMode?=?InterpolationMode.HighQualityBicubic;
?
????grPhoto.DrawImage（imgPhoto?
????????new?Rectangle（destXdestYdestWidthdestHeight）
????????new?Rectangle（sourceXsourceYsourceWidthsourceHeight）
????????GraphicsUnit.Pixel）;
?
????grPhoto.Dispose（）;
????return?bmPhoto;
}
//2、縮放到指定大小

static?Image?FixedSize（Image?imgPhoto?int?Width?int?Height）
{
????int?sourceWidth?=?imgPhoto.Width;
????int?sourceHeight?=?imgPhoto.Height;
????int?sourceX?=?0;
????int?sourceY?=?0;
????int?destX?=?0;
????int?destY?=?0;?
?
????float?nPercent?=?0;
????float?nPercentW?=?0;
????float?nPercentH?=?0;
?
????nPercentW?=?（（float）Width/（float）sourceWidth）;
????nPercentH?=?（（float）Height/（float）sourceHeight）;
????if（nPercentH?????{
????????nPercent?=?nPercentH;
????????destX?=?System.Convert.ToInt16（（Width?-?
??????????????????????（sourceWidth?*?nPercent））/2）;
????}
????else
????{
????????nPercent?=?nPercentW;
????????destY?=?System.Convert.ToInt16（（Height?-?
??????????????????????（sourceHeight?*?nPercent））/2）;
????}
?
????int?destWidth??=?（int）（sourceWidth?*?nPercent）;
????int?destHeight?=?（int）（sourceHeight?*?nPercent）;
?
????Bitmap?bmPhoto?=?new?Bitmap（Width?Height?
??????????????????????PixelFormat.Format24bppRgb）;
????bmPhoto.SetResolution（imgPhoto.HorizontalResolution?
?????????????????????imgPhoto.VerticalResolution）;
?
????Graphics?grPhoto?=?Graphics.FromImage（bmPhoto）;
????grPhoto.Clear（Color.Red）;
????grPhoto.InterpolationMode?=?
????????????InterpolationMode.HighQualityBicubic;
?
????grPhoto.DrawImage（imgPhoto?
????????new?Rectangle（destXdestYdestWidthdestHeight）
????????new?Rectangle（sourceXsourceYsourceWidthsourceHeight）
????????GraphicsUnit.Pixel）;
?
????grPhoto.Dispose（）;
????return?bmPhoto;
}
//3、裁剪縮放

static?Image?Crop（Image?imgPhoto?int?Width?
????????????????????int?Height?AnchorPosition?Anchor）
{
????int?sourceWidth?=?imgPhoto.Width;
????int?sourceHeight?=?imgPhoto.Height;
????int?sourceX?=?0;
????int?sourceY?=?0;
????int?destX?=?0;
????int?destY?=?0;
?
????float?nPercent?=?0;
????float?nPercentW?=?0;
????float?nPercentH?=?0;
?
????nPercentW?=?（（float）Width/（