WPF CodeBehind后台动态创建图片及添加事件

问题：WPF中DataGrid需要动态生成列并绑定值，首列包含图片和文本，点击图片触发事件。

难点：1.图片资源在VisualTree中的绑定

　　   2.图片的事件绑定

 public class MainScreenViewModel : CpScreen
    {

        public event MouseButtonEventHandler imageMouseDown;

        protected override void OnInitialize()
        {
            base.OnInitialize();
            imageMouseDown += new MouseButtonEventHandler(ImageMouseDown);
        }

        public void BtnQuery()
        {
            var view = this.GetView() as MainScreenView;  //MVVM
            if (view == null)
                return;

            List<DynamicModel> modelList = new List<DynamicModel>();

            BitmapImage bitmap = new BitmapImage();
            bitmap.BeginInit();
            bitmap.UriSource = new Uri("/Wilmar.Base.UI;Component/Resources/Icons/master_delete.gif", UriKind.RelativeOrAbsolute);
            bitmap.EndInit();

            for (int i = 0; i < 5; i++)
            {
                dynamic model = new DynamicModel();
                model.WardDesc = "病区" + i;
                model.ImagePath = bitmap;

                modelList.Add(model);
            }

            FrameworkElementFactory imgFactory = new FrameworkElementFactory(typeof(Image));

            Binding imgBind = new Binding("ImagePath");
            imgBind.Mode = BindingMode.TwoWay;
            imgFactory.SetValue(Image.SourceProperty, imgBind);
            imgFactory.SetValue(Image.TagProperty, new Binding(".")); //Tag,标记当前行绑定对象
            imgFactory.AddHandler(Image.MouseDownEvent, this.imageMouseDown);

            FrameworkElementFactory textFactory = new FrameworkElementFactory(typeof(TextBlock));
            textFactory.SetValue(TextBlock.TextProperty, new Binding("WardDesc"));

            FrameworkElementFactory contentFactory = new FrameworkElementFactory(typeof(StackPanel));
            contentFactory.SetValue(StackPanel.OrientationProperty, Orientation.Horizontal);
            contentFactory.AppendChild(imgFactory);
            contentFactory.AppendChild(textFactory);

            DataTemplate dt = new DataTemplate();
            dt.VisualTree = contentFactory;

            DataGridTemplateColumn colWardDesc = new DataGridTemplateColumn();
            colWardDesc.CellTemplate = dt;

            view.dgdStatistics.Columns.Add(colWardDesc);

            view.dgdStatistics.ItemsSource = modelList;
        }

        /// <summary>
        /// 切换图片，使用Tag标记的对象来对比图片地址
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void ImageMouseDown(object sender, RoutedEventArgs e)
        {
            var control = sender as Image;
            if (control == null)
                return;
            var model = control.Tag as DynamicModel;
            if (model == null)
                return;

            if (model.Properties["ImagePath"].ToString() == "/Wilmar.Base.UI;Component/Resources/Icons/master_delete.gif")
            {
                model.Properties["ImagePath"] = "/Wilmar.Base.UI;Component/Resources/Icons/master_add.gif";
                BitmapImage newImg = new BitmapImage(new Uri("/Wilmar.Base.UI;Component/Resources/Icons/master_add.gif", UriKind.RelativeOrAbsolute));
                control.Source = newImg;
            }
            else
            {
                model.Properties["ImagePath"] = "/Wilmar.Base.UI;Component/Resources/Icons/master_delete.gif";
                BitmapImage newImg = new BitmapImage(new Uri("/Wilmar.Base.UI;Component/Resources/Icons/master_delete.gif", UriKind.RelativeOrAbsolute));
                control.Source = newImg;
            }
        }
    }

动态属性类：

 public class DynamicModel : DynamicObject
    {
        public Dictionary<string, object> Properties = new Dictionary<string, object>();

        public override bool TrySetMember(SetMemberBinder binder, object value)
        {
            if (!Properties.Keys.Contains(binder.Name))
            {
                if (binder.Name == "Col")
                    Properties.Add(binder.Name + (Properties.Count), value.ToString());
                else
                    Properties.Add(binder.Name, value.ToString());
            }
            return true;
        }
        public override bool TryGetMember(GetMemberBinder binder, out object result)
        {
            return Properties.TryGetValue(binder.Name, out result);
        }
    }

效果图：

参考：http://stackoverflow.com/questions/1951839/how-do-i-show-image-in-wpf-datagrid-column-programmatically

原文地址：http://www.cnblogs.com/maomiyouai/p/3608468.html