什么是MVVM架构和数据绑定？

概述什么是MVVM架构和数据绑定？ （申明：最近在做一个练习，写点东西，谨供参考。）

1、界面展示：其中的布局和样式就不说了，重点在MVVM架构和数据绑定（Model层使用EF(Entity Framework)实体框架，不做介绍）。

绑定后：

2、架构介绍：

在VIEws层中新建CusGroupEditwindow窗体，viewmodels中建立CusGroupEditviewmodel类，在窗体的xaml或者cs中引用viewmodels对应类：

xaml中：

　　　　<Window.DataContext>

　　　　<local:CusGroupEditviewmodel/> <!--（添加引用local：为CusGroupEditviewmodel的路径）--> 　

　　　 </Window.DataContext>

　　cs：DataContext = CusGroupEditviewmodel。（添加引用路径）

/***********************************************/

*CsGroup是在viewmodel中定义的一个CusGroup对象，　　　 *

*CusGroup对象是在sql数据库中的表，在EF中的对象。　　　　*

/***********************************************/

3、TextBox绑定：

　　<TextBox MaxWIDth="550" WIDth="100" Text="{Binding CsGroup.Alarm,Mode=TwoWay}" />

4、button绑定：

　　<button WIDth="100" Height="35" margin="10" Command="{Binding BtnChangedCommand}" CommandParameter="btnCusGroupSave" Background="#fc8530" >

<TextBlock Text="保存" FontWeight="Bold" FontSize="16"></TextBlock>

</button>

<!-- Command="{Binding BtnChangedCommand}"中是在viewmodel中的委托，继承ICommoand -->

<!--CommandParameter="btnCusGroupSave" 参数-->

5、CheckBox绑定：

　　<CheckBox name="cbCash" margin="0,0,5,0" IsChecked="{Binding CsGroup.IsCash}"/>

　　<!-- IsCash 是在sql表中CusGroup中字段，bit类型--> 6、ComboBox绑定：

6、ComboBox绑定：

<ComboBox MaxWIDth="150" WIDth="100" SelectedValue="{Binding StrCMBselectValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" displayMemberPath="Text"                                              SelectedValuePath="Value" ItemsSource="{Binding LstCSGDownLevelID, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" />

<!--SelectedValue：选中CommoBox的值，Mode双向模式，属性改变时触发；displayMemberPath：显示时绑定；SelectedValuePath：表示选择下拉框某一项对应的值；ItemsSource：绑定的数据源 -->

<!-- 其中Value和Text也可理解为数据源，在viewmodel中有赋值-->

7、DataGrID绑定：

<DataGrID ColumnWIDth="*" SelectedItem="{Binding CurrentSelectItem}"  ItemsSource="{Binding CsGroupsAll}" autoGenerateColumns="False"  IsReadonly="True" >                                <DataGrID.Columns>                                    <DataGrIDTextColumn header="分组编号" Binding="{Binding Code}" />                                    <DataGrIDTextColumn header="分组名称" Binding="{Binding name}" />                                </DataGrID.Columns>                            </DataGrID>

/***************************************************************/

        //DataGrID当前选择对象private CusGroup currentSelectItem;public CusGroup CurrentSelectItem        {get { return currentSelectItem; }set{                currentSelectItem = value;                GetCutCmbSelect(value);            }        }

VIEw Code

<!--代码没有自动缩进，有点不知所措-->

/***************************************************************/

viewmodel 中的代码：

using heyin.ERP.DataModels;using heyin.ERP.IServices;using heyin.ERP.Models;using heyin.ERP.Services;using Microsoft.Practices.Prism.Commands;using System;using System.Collections.Generic;using System.Collections.ObjectModel;using System.windows;using System.Text.RegularExpressions;using System.windows.Controls;namespace heyin.ERP.ClIEnt.viewmodels.Customer{class CusGroupEditviewmodel : Baseviewmodel    {private bool bIsAdd = false;        ICusGroupService CGS;  //调用IService接口#region PropertIEs 属性private GuID gCsGroupID = GuID.Empty;//All CusGroupprivate List<CusGroup> csGroupsAll;public List<CusGroup> CsGroupsAll        {get { return csGroupsAll; }set{                csGroupsAll = value; //设定值OnPropertyChanged("CsGroupsAll"); //在属性更改后，通知            }        }private List<CusGroup> csGroupsMinPrestore;public List<CusGroup> CsGroupsAllMinPrestore        {get { return csGroupsMinPrestore; }set{                csGroupsMinPrestore = value; //设定值OnPropertyChanged("CsGroupsAllMinPrestore"); //在属性更改后，通知            }        }//CusGroup对象private CusGroup csGroup;public CusGroup CsGroup        {get { return csGroup; }set{ csGroup = value;                OnPropertyChanged("CsGroup"); }        }/// <summary>/// /// </summary>private string strCMBselectValue;public string StrCMBselectValue        {get { return strCMBselectValue; }set{if (value != null)                {                    strCMBselectValue = value;                    OnPropertyChanged("StrCMBselectValue");                }            }        }/// <summary>/// ComboBoxDataModel：作为一个ComboBox的对象，可以理解为数据源/// </summary>private ObservableCollection<ComboBoxDataModel> lstCSGDownLevelID;public ObservableCollection<ComboBoxDataModel> LstCSGDownLevelID        {get { return lstCSGDownLevelID; }set{                lstCSGDownLevelID = value;                OnPropertyChanged("LstCSGDownLevelID");            }        }//DataGrID当前选择对象private CusGroup currentSelectItem;public CusGroup CurrentSelectItem        {get { return currentSelectItem; }set{                currentSelectItem = value;                GetCutCmbSelect(value);            }        }private int errorCount;public int ErrorCount { get => errorCount; set => errorCount = value; }#endregion#region Commandspublic DelegateCommand<string> BtnChangedCommand { get; set; }public DelegateCommand<CusGroup> TxtChangedCommand { get; set; }        #endregionpublic CusGroupEditviewmodel()        {            CGS = new CusGroupService();            CsGroupsAll = new List<CusGroup>();            csGroup = new CusGroup();            LstCSGDownLevelID = new ObservableCollection<ComboBoxDataModel>();            BtnChangedCommand = new DelegateCommand<string>(MenuClick);            TxtChangedCommand = new DelegateCommand<CusGroup>(ChangeCMBValue);            GetAllCusGroups();        }#region buttonClickprivate voID MenuClick(string strMessage)        {if (string.IsNullOrEmpty(strMessage)) return;if (CsGroup == null) return;switch (strMessage)            {case "btnCusGroupSave":                    Save();break;case "btnCusGroupAdd":                    Add();break;case "btnCusGroupDelete":                    Delete();break;            }        }#endregion buttonClick#region motheds/// <summary>/// 获取全部Group/// </summary>private voID GetAllCusGroups()        {//获取满足条件的客户分组信息            CsGroupsAll.Clear();            CsGroupsAll = CGS.Get(s => s.IsDelete == 0);            GetAllCMBItems();//给降档分组下拉框赋值if ((gCsGroupID == null || gCsGroupID == GuID.Empty) && CsGroupsAll.Count > 0)                CsGroup = CsGroupsAll[0];    //给基础信息等赋值StrCMBselectValue = CsGroup.DownLevelID.ToString();//设置降档分组默认值        }/// <summary>/// 添加/// </summary>/// <param name="cg"></param>private voID AddCusGroup(CusGroup cg)        {            cg.ID = GuID.NewGuID(); //新建分组GUIDcg.IsDelete = 0;        //默认为0：不删除cg.CreateBy = App.GetCurrentUserID();//创建人员关联员工 GUIDcg.CreateTime = DateTime.Now;  //初始化创建时间，应该使用服务器当前时间bool c = CGS.Add(cg);if (c)            {                MessageBox.Show(string.Format("创建新组别【{0}】成功！", CsGroup.name), "提示", MessageBoxbutton.OK, MessageBoxImage.information);                GetAllCusGroups();                bIsAdd = false;            }        }/// <summary>/// 修改/// </summary>/// <param name="cg"></param>private voID UpdateCusGroup(CusGroup cg)        {            bIsAdd = false;            cg.UpdateTime = DateTime.Now;            cg.UpdateBy = App.GetCurrentUserID();//更新人员关联员工 GUIDstring[] str = { "UpdateTime", "UpdateBy" };bool b = CGS.Edit(cg, str);if (b)            {                MessageBox.Show("更改组别【成功】！", "提示", MessageBoxbutton.OK, MessageBoxImage.information);                GetAllCusGroups();            }        }/// <summary>///删除方法（实为更新）/// </summary>/// <param name="cg"></param>private voID DeleteCusGroup(CusGroup cg)        {            cg.IsDelete = 1; //更改数据库删除标志cg.UpdateTime = DateTime.Now;  //更新删除时间cg.UpdateBy = App.GetCurrentUserID();//更新人员关联员工 GUIDstring[] str = { "UpdateTime", "IsDelete", "UpdateBy" };bool b = CGS.Edit(cg, str);if (b)            {//MessageBox.Show(string.Format("已删除组别【{0}】！", CsGroup.name), "提示", MessageBoxbutton.OK, MessageBoxImage.information);                GetAllCusGroups();                CsGroup = new CusGroup(); //清空对象bIsAdd = true;            }        }/// <summary>/// 插入和更新方法调用/// </summary>private voID Save()        {if (ErrorCount > 0)            {//判断必填数据是否为空：为空则提示MessageBox.Show("请核对所填数据", "提示", MessageBoxbutton.YesNo, MessageBoxImage.information);return;            }if (bIsAdd)                AddCusGroup(CsGroup);elseUpdateCusGroup(CsGroup);        }/// <summary>/// 获取降档分组下拉列表的值，并指定默认值/// </summary>/// <param name="value"></param>private voID GetCutCmbSelect(CusGroup value)        {            bIsAdd = false;//点击新增后，再选择列表的逻辑if (value != null)            {                CsGroup = CGS.GetByID(value.ID);//查找出当前选中的对象gCsGroupID = CsGroup.ID;        //保存当前选择对象的GUIDif (CsGroup != null)                {if (CsGroup.DownLevelID.HasValue)                    {//如果降档ID有值，则默认显示，如果没有，则显示为空GetExceptCMBSelect();//刷新下拉列表，先刷新，再赋值给默认值StrCMBselectValue = CsGroup.DownLevelID.ToString();                    }else{                        LstCSGDownLevelID.Clear();                        StrCMBselectValue = string.Empty;                    }                }            }        }private voID Add()        {            bIsAdd = true;//点击新建分组时，重新获取所有降档ID对应的中文名            GetAllCMBItems();            CsGroup = new CusGroup();        }private voID Delete()        {if (this.CsGroup.ID == GuID.Empty || CsGroup.ID == null)                MessageBox.Show("请选择要删除组别", "提示", MessageBoxbutton.OK, MessageBoxImage.information);else{                MessageBoxResult msgResult = MessageBox.Show(string.Format("确定要删除分组【{0}】吗？", CsGroup.name), "提示", MessageBoxbutton.YesNo, MessageBoxImage.information);if (msgResult == MessageBoxResult.Yes)                    DeleteCusGroup(CsGroup);            }        }/// <summary>/// 排除当前列的降档ID和对应的name/// </summary>private voID GetExceptCMBSelect()        {            LstCSGDownLevelID.Clear();            CsGroupsAllMinPrestore = CGS.Get(s => s.IsDelete == 0 && s.MinPrestore <= CsGroup.MinPrestore);foreach (var IDlID in CsGroupsAllMinPrestore)            {if (IDlID.ID != CsGroup.ID) //去除当前选择ID对应的nameLstCSGDownLevelID.Add(new ComboBoxDataModel() { Value = IDlID.ID.ToString(), Text = IDlID.name });            }        }/// <summary>/// 获取列表中所有降档ID和对应的name/// </summary>private voID GetAllCMBItems()        {            LstCSGDownLevelID.Clear();foreach (var IDlID in CsGroupsAll)            {                LstCSGDownLevelID.Add(new ComboBoxDataModel() { Value = IDlID.ID.ToString(), Text = IDlID.name });            }        }private voID ChangeCMBValue(CusGroup cgMinPrestore)        {            LstCSGDownLevelID.Clear();            List<CusGroup> lstTextChange = new List<CusGroup>();            lstTextChange = CGS.Get(s => s.MinPrestore < cgMinPrestore.MinPrestore);foreach (var IDlID in lstTextChange)            {                LstCSGDownLevelID.Add(new ComboBoxDataModel() { Value = IDlID.ID.ToString(), Text = IDlID.name });            }        }public voID SizeChangedCommand(object obj, SizeChangedEventArgs e)        {            MessageBox.Show("日了狗");        }#endregion}}

VIEw中代码：

<clIEnt:BaseWindow x:Class="heyin.ERP.ClIEnt.VIEws.Customer.CusGroupEditwindow"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        xmlns:d="http://schemas.microsoft.com/Expression/blend/2008"        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"        xmlns:Interaction="http://schemas.microsoft.com/Expression/2010/interactions"        xmlns:Interactivity="http://schemas.microsoft.com/Expression/2010/interactivity"        xmlns:CommonValIDation="clr-namespace:heyin.ERP.Common.ValIDation;assembly=heyin.ERP.Common"        xmlns:clIEnt="clr-namespace:heyin.ERP.ClIEnt"        mc:Ignorable="d"        x:name="CusGroupWindow"         Title="客户分组" Height="500" WIDth="800"         windowstartupLocation="CenterOwner"        Loaded="Window_Loaded"         MaxBoxEnable="True"         MinBoxEnable="False" >    <Interactivity:Interaction.Triggers>        <Interactivity:EventTrigger Eventname="SizeChanged">            <Interaction:CallMethodAction Targetobject="{Binding}" Methodname="SizeChangedCommand"/>        </Interactivity:EventTrigger>    </Interactivity:Interaction.Triggers>    <GrID>        <GrID.RowDeFinitions>            <RowDeFinition Height="*" />            <RowDeFinition Height="50" />        </GrID.RowDeFinitions>        <GrID GrID.Row="0">            <GrID.ColumnDeFinitions>                <ColumnDeFinition WIDth="1*"/>                <ColumnDeFinition WIDth="2*"/>            </GrID.ColumnDeFinitions>            <!-- left -->            <GrID  margin="5,0,5,5">                <GroupBox name="gbGroupData">                    <GroupBox.headerTemplate>                        <DataTemplate>                            <WrapPanel margin="{StaticResource WrapPanelmarginForInfo}">                                <TextBlock Text="客户分组"  Height="20" />                                <button WIDth="20" Height="20" margin="50,0,0,0"                                         Command="{Binding DataContext.BtnChangedCommand,relativeSource={relativeSource Mode=FindAncestor,AncestorType=GroupBox}}"                                        CommandParameter="btnCusGroupAdd"                                        Visibility="{Binding SaveVisibility,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}">                                    <Image Source="..\..\Resources\Images\Add.png" />                                </button>                                <button WIDth="20" Height="20" margin="10,0,0,0"                                         Command="{Binding  DataContext.BtnChangedCommand,relativeSource={relativeSource Mode=FindAncestor,AncestorType=GroupBox}}"                                         CommandParameter="btnCusGroupDelete"                                        Visibility="{Binding SaveVisibility,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}">                                    <Image Source="..\..\Resources\Images\Clear.png" />                                </button>                            </WrapPanel>                        </DataTemplate>                    </GroupBox.headerTemplate>                    <GrID>                        <GrID GrID.Row="1">                            <DataGrID ColumnWIDth="*" SelectedItem="{Binding CurrentSelectItem}"  ItemsSource="{Binding CsGroupsAll}" autoGenerateColumns="False"  IsReadonly="True" >                                <DataGrID.Columns>                                    <DataGrIDTextColumn header="分组编号" Binding="{Binding Code}" />                                    <DataGrIDTextColumn header="分组名称" Binding="{Binding name}" />                                </DataGrID.Columns>                            </DataGrID>                        </GrID>                    </GrID>                </GroupBox>            </GrID>            <!-- Right -->            <GrID GrID.Column="1" margin="5">                <GrID.RowDeFinitions>                    <RowDeFinition Height="*"/>                    <RowDeFinition Height="100"/>                    <RowDeFinition Height="130"/>                </GrID.RowDeFinitions>                <!-- 基础信息 -->                <GrID>                    <GroupBox>                        <GroupBox.header>                            <TextBlock Text="基础信息" Height="20"/>                        </GroupBox.header>                        <StackPanel>                            <GrID margin="0,10">                                <GrID.ColumnDeFinitions>                                    <ColumnDeFinition WIDth="*" />                                    <ColumnDeFinition WIDth="*" />                                </GrID.ColumnDeFinitions>                                <TextBox  Visibility="Collapsed" x:name="tbErrorCount" Text="{Binding ErrorCount, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"></TextBox>                                <WrapPanel margin="{StaticResource WrapPanelmarginForInfo}">                                    <TextBlock WIDth="60" margin="{StaticResource TextBlockmarginForMostleft}"><Run Text="分组编号" /></TextBlock>                                    <TextBox name="txtCusGropCrod" MaxWIDth="150" WIDth="100"                                              tooltip="{Binding relativeSource={relativeSource self},Path=(ValIDation.Errors).CurrentItem.ErrorContent}" ValIDation.Error="ValIDation_Error">                                        <TextBox.Text>                                            <Binding Path="CsGroup.Code" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged" ValIDatesOnDataErrors="True" NotifyOnValIDationError="True">                                                <Binding.ValIDationRules>                                                    <ExceptionValIDationRule></ExceptionValIDationRule>                                                    <CommonValIDation:requiredValIDationRule MaxLenth="15" ErrorMessage="分组编号" Isrequired="True" ValIDatesOnTargetUpdated="True" />                                                </Binding.ValIDationRules>                                            </Binding>                                        </TextBox.Text>                                    </TextBox>                                </WrapPanel>                                <WrapPanel margin="{StaticResource WrapPanelmarginForInfo}" GrID.Column="1">                                    <TextBlock Text="分组名称" WIDth="60" margin="{StaticResource TextBlockmarginForMostleft}"/>                                    <TextBox name="txtCusGropname"  MaxWIDth="150" WIDth="100"                                              tooltip="{Binding relativeSource={relativeSource self},Path=(ValIDation.Errors).CurrentItem.ErrorContent}" ValIDation.Error="ValIDation_Error">                                        <TextBox.Text>                                            <Binding Path="CsGroup.name" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged" ValIDatesOnDataErrors="True" NotifyOnValIDationError="True">                                                <Binding.ValIDationRules>                                                    <ExceptionValIDationRule></ExceptionValIDationRule>                                                    <CommonValIDation:requiredValIDationRule MaxLenth="15" ErrorMessage="分组名称" Isrequired="True" ValIDatesOnTargetUpdated="True" />                                                </Binding.ValIDationRules>                                            </Binding>                                        </TextBox.Text>                                    </TextBox>                                </WrapPanel>                            </GrID>                            <GrID>                                <WrapPanel margin="{StaticResource WrapPanelmarginForInfo}">                                    <TextBlock margin="{StaticResource TextBlockmarginForMostleft}" WIDth="60" VerticalAlignment="Center"><Run Text="分组描述" /></TextBlock>                                    <TextBox x:name="tbRemark"  textwrapPing="Wrap" AcceptsReturn="True" VerticalScrollbarVisibility="Visible" WIDth="400" Height="90"                             tooltip="{Binding relativeSource={relativeSource self},Path=(ValIDation.Errors).CurrentItem.ErrorContent}" ValIDation.Error="ValIDation_Error">                                        <TextBox.Text>                                            <Binding Path="CsGroup.Description" Mode="TwoWay" UpdateSourceTrigger="PropertyChanged" ValIDatesOnDataErrors="True" NotifyOnValIDationError="True">                                                <Binding.ValIDationRules>                                                    <ExceptionValIDationRule></ExceptionValIDationRule>                                                    <CommonValIDation:requiredValIDationRule MaxLenth="300" ErrorMessage="分组描述"  ValIDatesOnTargetUpdated="True" />                                                </Binding.ValIDationRules>                                            </Binding>                                        </TextBox.Text>                                    </TextBox>                                </WrapPanel>                            </GrID>                        </StackPanel>                    </GroupBox>                </GrID>                <!-- 消费相关 -->                <GrID GrID.Row="1" margin="0,10,0,10">                    <GrID>                        <GroupBox>                            <GroupBox.header>                                <TextBlock Text="消费相关"/>                            </GroupBox.header>                            <GrID margin="0,10">                                <GrID.ColumnDeFinitions>                                    <ColumnDeFinition WIDth="*"/>                                    <ColumnDeFinition WIDth="*"/>                                </GrID.ColumnDeFinitions>                                <WrapPanel margin="{StaticResource WrapPanelmarginForInfo}">                                    <TextBlock Text="消费积分" WIDth="60" Height="20" margin="{StaticResource TextBlockmarginForMostleft}" />                                    <TextBox name="txtCusGropJF" MaxWIDth="150" WIDth="100" Text="{Binding CsGroup.PointConversion, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" />                                </WrapPanel>                                <WrapPanel GrID.Column="1" margin="{StaticResource WrapPanelmarginForInfo}"  HorizontalAlignment="left" VerticalAlignment="Center">                                    <CheckBox name="cbCash" margin="0,0,5,0" IsChecked="{Binding CsGroup.IsCash}"/>                                    <TextBlock Text="开通预存或储值时禁止现金交易" />                                </WrapPanel>                            </GrID>                        </GroupBox>                    </GrID>                </GrID>                <!-- 预存相关 -->                <GrID GrID.Row="2">                    <GroupBox>                        <GroupBox.header>                            <TextBlock Text="预存相关"/>                        </GroupBox.header>                        <StackPanel>                            <GrID margin="0,10">                                <GrID.ColumnDeFinitions>                                    <ColumnDeFinition WIDth="*"/>                                    <ColumnDeFinition WIDth="*"/>                                </GrID.ColumnDeFinitions>                                <WrapPanel margin="{StaticResource WrapPanelmarginForInfo}">                                    <TextBlock WIDth="80" margin="{StaticResource TextBlockmarginForMostleft}" ><Run Text="预存最低充值"/></TextBlock>                                    <TextBox MaxWIDth="150" WIDth="100" Text="{Binding CsGroup.MinPrestore, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" />                                </WrapPanel>                                <WrapPanel GrID.Column="1" margin="{StaticResource WrapPanelmarginForInfo}">                                    <TextBlock WIDth="80" Text="金额低缺报警" margin="{StaticResource TextBlockmarginForMostleft}" />                                    <TextBox MaxWIDth="550" WIDth="100" Text="{Binding CsGroup.Alarm,Mode=TwoWay}" />                                </WrapPanel>                            </GrID>                            <GrID margin="0,5">                                <WrapPanel margin="{StaticResource WrapPanelmarginForInfo}">                                    <TextBlock WIDth="190" Text="预存金额未达到最低要求时降档至" margin="{StaticResource TextBlockmarginForMostleft}"/>                                    <ComboBox MaxWIDth="150" WIDth="100" SelectedValue="{Binding StrCMBselectValue, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" displayMemberPath="Text"                                              SelectedValuePath="Value" ItemsSource="{Binding LstCSGDownLevelID, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" />                                </WrapPanel>                            </GrID>                        </StackPanel>                    </GroupBox>                </GrID>            </GrID>        </GrID>        <!-- bottom -->        <GrID GrID.Row="2">            <WrapPanel HorizontalAlignment="Center" VerticalAlignment="Center" margin="{StaticResource WrapPanelmarginForInfo}">                <button margin="1" Command="{Binding BtnChangedCommand}" CommandParameter="btnCusGroupSave" Background="#fc8530" Style="{StaticResource SavebuttonStyle}"                        Visibility="{Binding SaveVisibility,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}" >                    <TextBlock  Text="保存"  FontWeight="Bold" FontSize="16"></TextBlock>                </button>            </WrapPanel>        </GrID>    </GrID></clIEnt:BaseWindow>

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