将图像转换为 Base64String [英] Convert Image to Base64String

问题描述

我需要一些帮助来将图像转换为 base64string.我曾在 stackoverflow 中使用过类似问题的解决方案，但出现错误.

I need some help in convert image to base64string. I had used solution from similar question in stackoverflow but an error occured.

使用的解决方案:在 wp8 中将图像转换为 base64

问题出在我曾经设置为可写位图的图像源上，但结果是空异常.

The problem lies on the Image's Source I used to set as a writeablebitmap but the outcome was a null exception.

这是我的图片来源:

image123.Source = new BitmapImage(new Uri("/correct1.jpg", UriKind.Relative));

此行发生错误:

WriteableBitmap wbitmp = new WriteableBitmap((BitmapImage)image123.Source);

错误:

An exception of type 'System.NullReferenceException' occurred in System.Windows.ni.dll but was not handled in user code

我现有的代码作为参考:

My existing code as reference :

        image123.Source = new BitmapImage(new Uri("/correct1.jpg", UriKind.Relative));

        byte[] bytearray = null;

        using (MemoryStream ms = new MemoryStream())
        {
            if (image123.Source != null)
            {
                WriteableBitmap wbitmp = new WriteableBitmap((BitmapImage)image123.Source);
                wbitmp.SaveJpeg(ms, 46, 38, 0, 100);
                bytearray = ms.ToArray();
            }
        }
        str = Convert.ToBase64String(bytearray);

        binarytxt.Text = str;

我真的很想寻求帮助，因为这是我的主要项目.提前致谢！

I'm really desperate for help as this is my major project. Thanks in advance!

推荐答案

代码工作正常，只是它需要一个 EventHandler.我使用了 Button_Click 侦听器 来运行代码，它运行良好！

The codes are working correctly, just that it needs an EventHandler. I had used a Button_Click Listener to run the codes and it worked perfectly!

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