WPF MVVM COMMOND 传参

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一、直接绑定（对于有事件的控件可以通过直接绑定的方式）

1、view

hc:SideMenuItem Header="接谈中" Cursor="Hand" Command="{Binding AddTabItemCommand}" CommandParameter="PDjtList.xaml">



                        hc:SideMenuItem.Icon>



                            Image Source="/Images/icons/jtz.png" Width="24" Height="24"/>



                        hc:SideMenuItem.Icon>




                    hc:SideMenuItem>

2、viewmodel

/// 




        /// 命令：传递参数




        /// 




        public RelayCommandstring> AddTabItemCommand =>



            new Lazystring>>(() =>




                new RelayCommandstring>(AddTabItem)).Value;



 



 



        /// 





        /// 添加新页面




        /// 




        /// 




        private void AddTabItem(string param)




        {



            string test = param;



 



 



        }

二、EventTrigger绑定（对于通过datatemp遍历的控件没有事件可以绑定的情况，如listbox）

xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"

"sideMenu" SelectedIndex="{Binding MenuSelectedIndex}" ItemsSource="{Binding MenuList}" BorderThickness="0" SelectionMode="Single">



                    




                        




                            "40">




                                "20" Height="20" Source="{Binding Icons}"/>




                                "10,12,0,0" FontSize="14" Text="{Binding Title}"/>




                                "param" Visibility="Hidden" Text="{Binding Url}"/>




                            



                        



                    



                    




                        "SelectionChanged">




                            "{Binding ElementName=sideMenu, Path=DataContext.SelectMenuCommand}" PassEventArgsToCommand="True" />




                        



                    



                

/// 




        /// 菜单选择事件




        /// 




        public RelayCommand SelectMenuCommand =>




            new Lazy>(() =>




                new RelayCommand(SelectMenu)).Value;




 



        /// 





        /// 选中菜单打开页面




        /// 




        private void SelectMenu(SelectionChangedEventArgs e)




        {



            if (e.AddedItems.Count == 0) return;



            if (e.AddedItems[0] is MenuInfo item)



            {



                if (Equals(_selectedMenu, item)) return;



 



                _selectedMenu = item;



                DataList.Add(new TabControlModel



                {



                    Header = item.Title,



                    Url = item.Url



                });



                TabSelectedIndex = DataList.ToArray().Length - 1;



 



            }



        }

三、Image点击事件

"img_verifycode" Height="40" Margin="0,10,30,0" Source="{Binding VerifyCode}">



                                                




                                                    "MouseLeftButtonDown">




                                                        "{Binding ElementName=img_verifycode, Path=DataContext.SwitchVerifyCodeCommand}" />




                                                    



                                                

WPF MVVM COMMOND 传参

标签：RoCE   hang   control   打开   nta   dock   ram   pre   tar   

原文地址：https://www.cnblogs.com/lonelyxmas/p/12164917.html