在wpf绑定图片，用viewModel的图片绑定image

我是用viewModel.cs

public class viewModel:INotifyPropertyChanged

{

        #region

        ///代码

        #endregion

        public event PropertyChangedEventHandler PropertyChanged;

        public BitmapImage img

        {

            set

            {

                _img= value;

                OnPropertyChanged("img");

            }

            get

            {

                return _img;

            }

        }

        private BitmapImage _img=new BitmapImage(new Uri("imgf/img.jpg" , UriKind.Relative));

        //UriKind.Relative 相对

        protected void OnPropertyChanged(string name)

        {

            PropertyChangedEventHandler handler = PropertyChanged;

            if (handler != null)

            {

                handler(this , new PropertyChangedEventArgs(name));

            }

        }

}

<Image x:Name="image" Source="{Binding Path=img}" Width="300" Height="auto" HorizontalAlignment="Center"/>

结果不会显示图，debug发现

<Image x:Name="image" Source="imgf/img.jpg" Width="300" Height="auto" HorizontalAlignment="Center"/>

显示

                BitmapImage t=new BitmapImage(new Uri("imgf/img.jpg" , UriKind.Relative));

            image.Source = t;

显示

image.Source=viewModel.g_viewModel().img;

不显示

想到图片位置错误，检查。

用imgf/img.jpg可以绑定image

ImageSource 和 BitmapImage可以绑定image

操作viewModel img可以xaml image