無法加載資源：服務器500（內部服務器錯誤）的狀態迴應，同時從控制器

Question

以base64格式返回圖像，我有以下的代碼來裁剪圖像：

$.ajax({ 
     type: "POST", 
     url: root("CropController/CropImage"), 
     data: { 
      imagePath: imagesrc, 
      cropPointX: parseInt(PointX), 
      cropPointY: parseInt(PointY), 
      imageCropWidth: parseInt(CropWidth), 
      imageCropHeight: parseInt(CropHeight) 
     } 
    }).done(function (dt) { 
     alert(dt.photo); 
    }); 

而控制器代碼是：

public JsonResult CropImage(string imagePath, int? cropPointX, int? cropPointY, int? imageCropWidth, int? imageCropHeight) 
    { 
     string output = imagePath.Substring(imagePath.IndexOf(',') + 1); 
     byte[] imageBytes = Convert.FromBase64String(output); 

      //croppedImage will have the cropped part of the image. 
     byte[] croppedImage = ImageCroping.CropImage(imageBytes, cropPointX.Value, cropPointY.Value, imageCropWidth.Value, imageCropHeight.Value); 

     string photo = "data:image/jpeg;base64," + Convert.ToBase64String(croppedImage); 
     return Json(new { photoPath = photo }, JsonRequestBehavior.AllowGet); 

    } 

如果種植面積較小，則在完成功能警報將被調用，但是當種植面積大，做功能不會觸發它拋出的錯誤。任何人都可以幫助我這個。在此先感謝

Answer 1

嘗試使用ContentResult而不是JSON。這似乎JSON有問題，它的長度和它的一些錯誤的字符，也可以與它的GET允許的回報：

public ActionResult CropImage(string imagePath, int? cropPointX, int? cropPointY, int? imageCropWidth, int? imageCropHeight) 
    { 
     string output = imagePath.Substring(imagePath.IndexOf(',') + 1); 
     byte[] imageBytes = Convert.FromBase64String(output); 

      //croppedImage will have the cropped part of the image. 
     byte[] croppedImage = ImageCroping.CropImage(imageBytes, cropPointX.Value, cropPointY.Value, imageCropWidth.Value, imageCropHeight.Value); 

     string photo = "data:image/jpeg;base64," + Convert.ToBase64String(croppedImage); 
     return Content(photo); 

    }