WPF Image 显示图片问题

[zq1564171310]

期望效果：当图片大小小于控件大小，stretch为none，否则为Uniform（控件大小固定）

[zq1564171310]

 if (photo.ActualHeight > this.Height)
            {
                photo.Stretch = Stretch.Uniform;
                photo.Height = this.Height;
            }
            else
            {
                photo.Stretch = Stretch.None;
            }
            if (photo.ActualWidth > this.Width)
            {
                photo.Stretch = Stretch.Uniform;
                photo.Width = this.Width;
            }
            else
            {
                photo.Stretch = Stretch.None;
            }

这样虽然可以做到，但是第一次点击时还是大过，下一张图片才会起效果，没有达到预期效果

[zq1564171310]

谢谢了，大虾！已结贴！

[zq1564171310]

有大虾吗？求助！别沉了

[sunny906]

            BitmapImage source = new BitmapImage(new Uri(@"图片路径"));
            if (source.Width < this.image.Width || source.Height < this.image.Height)
            {
                this.image.Stretch = Stretch.None;
            }
            else
            {
                this.image.Stretch = Stretch.Uniform;
            }
            this.image.Source = source;

[sunny906]

改一下

            BitmapImage source = new BitmapImage(new Uri(@"E:\资料\图片\apic5295_s.jpg"));
            if (source.Width <= this.image.Width && source.Height <= this.image.Height)
            {
                this.image.Stretch = Stretch.None;
            }
            else
            {
                this.image.Stretch = Stretch.Uniform;
            }
            this.image.Source = source;