WPF中的Image控件上传，保存，显示头像

//选择电脑上的图片显示到Image控件中
       private void btnUpload_Click(object sender, RoutedEventArgs e)
       {
           // 打开文件对话框以选择要上传的图片  
           OpenFileDialog openFileDialog = new OpenFileDialog();
           openFileDialog.Filter = "Image Files (*.jpg, *.jpeg, *.png, *.bmp)|*.jpg;*.jpeg;*.png;*.bmp";
           if (openFileDialog.ShowDialog() == true)
           {
               // 将选定的图片文件加载到Image对象中  
               myImage.Source = new BitmapImage(new Uri(openFileDialog.FileName));
           }
       }

保存是随机生成名字，保存到应用程序目录下的Images目录下，记得测试时在Debug目录下手工建立, 数据库里就存名字就行了

string _Photo = "";
          
           try
           {
               string filename = Guid.NewGuid().ToString() + ".jpg";
               var encoder = new PngBitmapEncoder();
               encoder.Frames.Add(BitmapFrame.Create((BitmapSource)myImage.Source));
               FileStream file = new FileStream($"Images/{filename}", FileMode.Create);
               encoder.Save(file);
               file.Close();
               _Photo = filename;
           }
           catch (Exception ex)
           {
                 
           }

#region 显示头像
           if (!string.IsNullOrEmpty(u.Photo))
           {
               string path = AppDomain.CurrentDomain.BaseDirectory + "Images";
               BitmapImage bmp = new BitmapImage();
               bmp.BeginInit();
               bmp.UriSource = new Uri(path + "\\" + u.Photo);
               bmp.EndInit();
               myImage.Source = bmp; 
           }
           #endregion