SignaturePad Xamarin Forms PCL无法捕获图像

Question

我正在使用PCL的SignaturePad Nuget。

如何将此System.IO.Stream转换为图像？

任何想法都将不胜感激。谢谢。

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Answer 1

这是我对此进行了两周的研究后发现的。

这是在安卓手机上将签名保存到png文件的c#代码。

 async void Enregistrer(object sender, EventArgs e)
    {


        // This is the code to get the image (as a stream)
        var img = padView.GetImage(Acr.XamForms.SignaturePad.ImageFormatType.Png); // This returns the Bitmap from SignaturePad.

        img.Seek(0,0); // This is to have the current position in the stream

        // create a new file stream for writing
        FileStream fs = new FileStream(Android.OS.Environment.ExternalStorageDirectory + "/imagefilename.png", FileMode.Create,FileAccess.Write); // create a new file stream for writing

        await img.CopyToAsync(fs); // have the image stream to disk

        fs.Close(); // close the filestream

        img.Dispose(); // clear the ressourse used by the stream


    }

祝你玩得开心！