c# - 如何使用 UWP 将图像保存到 azure mysql 数据库

Question

我使用以下方式拍摄了图片cameracaptureui 和我在图像控制中有图像。现在的问题是如何将捕获的图像保存到我的数据库中？通常我通过将图像转换为字节以 Windows 形式完成此任务。但现在 UWP 有点困惑。提前致谢

我尝试过:`

 private async void button_Copy_Click(object sender, RoutedEventArgs e)
    {
        //create camera instance with camera capture ui 
        CameraCaptureUI captureUI = new CameraCaptureUI();
        captureUI.PhotoSettings.Format = CameraCaptureUIPhotoFormat.Jpeg;
        captureUI.PhotoSettings.CroppedSizeInPixels = new Size(200, 200);
        StorageFile photo = await captureUI.CaptureFileAsync(CameraCaptureUIMode.Photo);
        if (photo == null)
        {
            // User cancelled photo capture
            return;
        }
        //return the captured results to fram via bitmap
        IRandomAccessStream stream = await photo.OpenAsync(FileAccessMode.Read);
        BitmapDecoder decoder = await BitmapDecoder.CreateAsync(stream);
        SoftwareBitmap softwareBitmap = await decoder.GetSoftwareBitmapAsync();
        SoftwareBitmap softwareBitmapBGR8 = SoftwareBitmap.Convert(softwareBitmap,BitmapPixelFormat.Bgra8, BitmapAlphaMode.Premultiplied);
        SoftwareBitmapSource bitmapSource = new SoftwareBitmapSource();
        await bitmapSource.SetBitmapAsync(softwareBitmapBGR8);
        imageControl.Source = bitmapSource;
    }

Answer 1

将图像转换为Base64并将其保存到mysql数据库。将捕获的图像保存到应用程序本地文件夹并将其转换为Base64。

C# 代码:

using System.Threading.Tasks;
using Windows.Storage;
using Windows.Storage.Streams;

  private async void btn_Click(object sender, RoutedEventArgs e)
    {
        var file = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appdata:///local/" + "your_image_name.png"));
        string base64image = await _encodeToBase64(file.Path);
    }

 public async Task<string> _encodeToBase64(string filePath)
    {
        string encode = String.Empty;
        if (!string.IsNullOrEmpty(filePath))
        {
            StorageFile file = await StorageFile.GetFileFromPathAsync(filePath);
            IBuffer buffer = await FileIO.ReadBufferAsync(file);
            DataReader reader = DataReader.FromBuffer(buffer);
            byte[] fileContent = new byte[reader.UnconsumedBufferLength];
            reader.ReadBytes(fileContent);
            encode = Convert.ToBase64String(fileContent);
        }
        return encode;
    }