无法加载资源：服务器500（内部服务器错误）的状态回应，同时从控制器

Question

以base64格式返回图像，我有以下的代码来裁剪图像：

$.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); 
    }); 

而控制器代码是：

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); 

    } 

如果种植面积较小，则在完成功能警报将被调用，但是当种植面积大，做功能不会触发它抛出的错误。任何人都可以帮助我这个。在此先感谢

Answer 1

尝试使用ContentResult而不是JSON。这似乎JSON有问题，它的长度和它的一些错误的字符，也可以与它的GET允许的回报：

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); 

    }