當麻許的超技八

private async void btnInsertImage_Click(object sender, RoutedEventArgs e)

{

    //制式的選取檔案寫法

    FileOpenPicker fop = new FileOpenPicker();

    fop.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;

    fop.FileTypeFilter.Clear();

    fop.FileTypeFilter.Add(".jpg");

    //讀取檔案

    StorageFile fileStream = await fop.PickSingleFileAsync();

    if (fileStream==null) return;

    //讀取成 IRandomAccessStream

    IRandomAccessStream stream = await fileStream.OpenAsync(FileAccessMode.Read);

    //插入

    richEditBox.Document.Selection.InsertImage(200, 200, 200, VerticalCharacterAlignment.Baseline, "插入圖片", stream);

    //Close the stream 

    stream.Dispose();

    //更新

    richEditBox.Document.ApplyDisplayUpdates();

}