将WriteableBitmap导出为图像文件 [英] Exporting a WriteableBitmap as an image file

问题描述

我需要导出剪切图像后得到的WriteableBitmap。我没有得到如何做到这一点，我使用以下内容：

Hi,

I need to export a WriteableBitmap that I get after cropping an image. I am not getting how to do that, I am using the following:

try
            {
                byte[] byteStream;
                byteStream = ToByteArray(sample);
                Stream stream = new MemoryStream(byteStream);
                if (filename != null && filename != "")
                {
                    string imgCropFileName = "Crop_" + DateTime.Now.Day + filename;
                    MessageBox.Show("FileName" + " " + imgCropFileName);
                    UploadFile(imgCropFileName, stream);
                }
                else
                    MessageBox.Show("FileName" + " " + filename);
            }
            catch (Exception ex) { MessageBox.Show(ex.Message); }

在代码段中，ToByteArray是一个将WriteableBitmap转换为字节数组的函数。

用于上传，我正在使用一个通用的处理程序，当命中并获取相关参数时，上传文件。

请帮帮我。

In the code segment ToByteArray is a function to convert WriteableBitmap into array of bytes.
For uploading, I am using a generic handler which when hit and get relevant parameters, uploads the file.
Please help me.

推荐答案

这是由一个单独的类完成，其中一个派生类基于 System.Windows.Media.Imaging.BitmapEncoder 。请参阅：

http：// msdn .microsoft.com / zh-cn / library / system.windows.media.imaging.bitmapencoder.aspx [ ^ ]。



实际上，这是一个非常好的WFP功能：持久性与图像隔离。如果你考虑一下，你会发现它有助于遵循基本的OOP开发开放/关闭原则：

http://en.wikipedia.org/wiki/Open_Closed_Principle [ ^ ]。

-SA

This is done by a separate class, one of the derived classes based on System.Windows.Media.Imaging.BitmapEncoder. Please see:
http://msdn.microsoft.com/en-us/library/system.windows.media.imaging.bitmapencoder.aspx[^].

Actually, this is a very good WFP feature: persistence is isolated from images. If you think about it, you will see that it helps to follow the fundamental OOP development Open/Close Principle:
http://en.wikipedia.org/wiki/Open_Closed_Principle[^].

—SA

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