//=========================================================================================
// Crop Image
#region -- ProcessImageCrop --
/// <summary>
/// Processes the image crop.
/// </summary>
public Dictionary <string, string> ProcessImageCrop(
UploadImage currentImage,
int[] sectionValue)
{
var result = new Dictionary <string, string>();
try
{
//取得裁剪的區域座標
var sectionX1 = sectionValue[0];
var sectionX2 = sectionValue[1];
var sectionY1 = sectionValue[2];
var sectionY2 = sectionValue[3];
//取得裁剪的圖片寬高
int width = sectionX2 - sectionX1;
int height = sectionY2 - sectionY1;
//讀取原圖片
System.Drawing.Image sourceImage = System.Drawing.Image.FromFile
(
string.Format(@"{0}\{1}", this.OriginalPath, currentImage.OriginalImage)
);
//從原檔案取得裁剪圖片
System.Drawing.Image cropImage = this.CropImage(
sourceImage,
new Rectangle(sectionX1, sectionY1, width, height)
);
//將採剪下來的圖片做縮圖處理
Bitmap resizeImage = this.ResizeImage(cropImage, new Size(100, 100));
//將縮圖處理完成的圖檔儲存為JPG格式
var fileName = String.Concat(MiscUtility.MakeGuid().Replace("-", string.Empty).Substring(0, 20), ".jpg");
var savePath = string.Format(@"{0}\{1}", this.CropPath, fileName);
SaveJpeg(savePath, resizeImage, 100L);
//釋放檔案資源
resizeImage.Dispose();
cropImage.Dispose();
sourceImage.Dispose();
//如果有之前的裁剪圖片，暫存既有的裁剪圖片檔名
string oldCropImageFileName = string.Empty;
if (!string.IsNullOrWhiteSpace(currentImage.CropImage))
{
oldCropImageFileName = currentImage.CropImage;
}
//JSON
result.Add("result", "Success");
result.Add("OriginalImage", currentImage.OriginalImage);
result.Add("CropImage", fileName);
result.Add("OldCropImage", oldCropImageFileName);
}
catch (Exception ex)
{
result.Add("result", "Exception");
result.Add("msg", ex.Message);
}
return(result);
}