Question

此代码从图片库中获取名称为face1.jpg，face2.jpg等的照片并显示它们。现在的问题是它适用于前9张图片然后停止。但它应该通过画廊中的所有图片

 StorageFolder picturesFolder = KnownFolders.PicturesLibrary;
            IReadOnlyList<IStorageFile> file = await picturesFolder.GetFilesAsync(CommonFileQuery.OrderByDate);
            string fname;
            int picSize = 150;
            int i = 0;
            WriteableBitmap wv = new WriteableBitmap(picSize, picSize);
            WriteableBitmap mypic = new WriteableBitmap(picSize, picSize);
            if (file.Count > 0)
            {
                foreach (StorageFile f in file)
                {
                    fname = "face" + i + ".jpg";

                    if (f.Name == fname)
                    {
                        i = i + 1;
                        ImageProperties properties = await f.Properties.GetImagePropertiesAsync();
                        WriteableBitmap wb = new WriteableBitmap((int)properties.Width, (int)properties.Height);
                        wb.SetSource((await f.OpenReadAsync()).AsStream());
                        reSize(wb, wv);
                        FilterWriteableBitmap(wv, mypic);
                        img.Source = mypic;
                    }

                }
            }

当我尝试直接拍摄照片意味着我写if(f.Name=="face10.jpg")然后它可以正常工作但在循环内它停在face9。

Answer 1

更改

int i = 0;

到

int i = 1;

假设该文件夹中有10个文件，foreach将经历10次，但第一次查找face0.jpg并且只能访问face9.jpg。

c＃如何从图库中加载图片，WP8.1 Silverlight

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