如何使用MVVM顯示和選擇具有WPF C＃的Datagrid組合框中的項目使用MVVM

Question

我希望能夠從wpf Datagrid內的組合框中選擇「true」或「false」（布爾值），並且能夠將該選項保存到我的數據庫中。

我希望能夠通過保存到我的數據庫的布爾變量（1 = true; 0 = false）來指示行內是否爲「活動」。

這裏是我創建表的語句： Create Table Statement(AccountType)

我填充使用一個ObservableCollection數據網格如下：

protected override void Get() 
{ 
    using (var dbContext = new IEMASEntitiesDataContext()) 
    { 
     var accountType = from s in dbContext.AccountTypes select s; 
     var observable = new ObservableCollection<AccountType>(accountType); 

     Collection = observable; 
    } 
} 

我的XAML代碼如下：

<DockPanel DataContext="{StaticResource ResourceKey=AccountTypeViewModel}" LastChildFill="True"> 
    <ToolBar DockPanel.Dock="Top"> 
     <Button Content="Display" Command="{Binding GetCommand}" Width="78"/> 
     <Button Content="Save" Command="{Binding SaveCommand}" Width="78"/> 
    </ToolBar> 

    <Grid> 
     <GroupBox x:Name="AccountTypeGroupBox"> 
      <DataGrid x:Name="DataGridAccountType" ItemsSource="{Binding Collection}" AutoGenerateColumns="False"> 
       <DataGrid.Columns> 
        <DataGridTextColumn Header="AccountType" Width="150" Binding="{Binding Path=AccountTypeName, Mode=TwoWay, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}"/> 
        <DataGridComboBoxColumn Header="Active" Width="100" SelectedValueBinding="{Binding StatusList, UpdateSourceTrigger=PropertyChanged}" SelectedValuePath="AccountTypeId" DisplayMemberPath="Active"/>     
        <DataGridTemplateColumn Width="50" Header="Delete"> 
         <DataGridTemplateColumn.CellTemplate> 
          <DataTemplate> 
           <Button x:Name="btnDelete" Content="Delete" Command="{Binding DeleteCommand}"/> 
          </DataTemplate> 
         </DataGridTemplateColumn.CellTemplate> 
        </DataGridTemplateColumn> 
       </DataGrid.Columns> 
      </DataGrid> 
     </GroupBox>   
    </Grid> 
</DockPanel> 

一點也沒有沒有工作。沒有任何內容顯示在組合框中，我不知道如何在顯示時將選定項目保存到SQL Server數據庫。我希望得到一些幫助。我正在使用LINQ TO SQL。我是一個新手:-(。

Answer 1

因爲我可以理解的問題是如何綁定一些XAML資源作爲組合ItemsSource和附加如何將選定的組合值綁定到DataGrid行後面的模型。 1。列表項：

<Window x:Class="SoDataGridProjectsHelpAttempt.MainWindow" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:soDataGridProjectsHelpAttempt="clr-namespace:SoDataGridProjectsHelpAttempt" 
    xmlns:system="clr-namespace:System;assembly=mscorlib" 
    Title="MainWindow" Height="350" Width="525"> 
<Window.Resources> 
    <x:Array x:Key="CountriesArray" Type="soDataGridProjectsHelpAttempt:Country"> 
     <soDataGridProjectsHelpAttempt:Country CountryName="Germany" CountryPop="150k"/> 
     <soDataGridProjectsHelpAttempt:Country CountryName="France" CountryPop="125k"/> 
     <soDataGridProjectsHelpAttempt:Country CountryName="Belarus" CountryPop="165k"/> 
    </x:Array> 
    <x:Array x:Key="StatusArray" Type="soDataGridProjectsHelpAttempt:ActivityStatus"> 
     <soDataGridProjectsHelpAttempt:ActivityStatus VerbalStatus="Yes" BoolStatus="True"/> 
     <soDataGridProjectsHelpAttempt:ActivityStatus VerbalStatus="No" BoolStatus="False"/> 
    </x:Array> 
</Window.Resources> 
<Window.DataContext> 
    <soDataGridProjectsHelpAttempt:DataGridMainDataContext/> 
</Window.DataContext> 
<Grid> 
    <DataGrid ItemsSource="{Binding Collection}" AutoGenerateColumns="False" CanUserAddRows="True"> 
     <DataGrid.Columns> 
      <DataGridTextColumn  Width="Auto" Binding="{Binding UName}"/> 
      <DataGridComboBoxColumn Header="Country" DisplayMemberPath="CountryName" 
            ItemsSource="{StaticResource CountriesArray}" Width="Auto" 
            SelectedItemBinding="{Binding CountryData}"/> 
      <!--<DataGridComboBoxColumn Header="ActivityStatus" Width="Auto" ItemsSource="{StaticResource StatusArray}" 
            SelectedValueBinding="{Binding IsActive}" SelectedValuePath="BoolStatus" DisplayMemberPath="VerbalStatus"/>--> 
      <DataGridComboBoxColumn Header="ActivityStatus" SelectedItemBinding="{Binding IsActive, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"> 
       <DataGridComboBoxColumn.ItemsSource> 
        <x:Array Type="system:Boolean"> 
         <system:Boolean>True</system:Boolean> 
         <system:Boolean>False</system:Boolean> 
        </x:Array> 
       </DataGridComboBoxColumn.ItemsSource> 
      </DataGridComboBoxColumn> 
     </DataGrid.Columns> 
    </DataGrid> 
</Grid> 

數據網格視圖模型：

public class DataGridMainDataContext 

{ 公共DataGridMainDataContext（） { 類別=新的ObservableCollection（新列表 { new UserData { UNAME = 「格雷格」， IsActive =假， }， 新的UserData { UNAME = 「喬」， IsActive =假， }， 新的UserData { UNAME = 「IV」， IsActive =假， } }）;

} 

public ObservableCollection<UserData> Collection { get; set; } 

}

型號： 公共類的UserData：BaseObservableObject { 私人字符串_uName; 私人對象_countryData; private bool _isActive;

public bool IsActive 
{ 
    get { return _isActive; } 
    set 
    { 
     _isActive = value; 
     OnPropertyChanged(); 
    } 
} 

public string UName 
{ 
    get { return _uName; } 
    set 
    { 
     _uName = value; 
     OnPropertyChanged(); 
    } 
} 

public object CountryData 
{ 
    get { return _countryData; } 
    set 
    { 
     _countryData = value; 
     OnPropertyChanged(); 
    } 
} 

}

公共類ActivityStatus：BaseObservableObject { 私人布爾_boolStatus; 私人字符串_verbalStatus;

public bool BoolStatus 
{ 
    get { return _boolStatus; } 
    set 
    { 
     _boolStatus = value; 
     OnPropertyChanged(); 
    } 
} 

public string VerbalStatus 
{ 
    get { return _verbalStatus; } 
    set 
    { 
     _verbalStatus = value; 
     OnPropertyChanged(); 
    } 
} 

}

公共類國家：BaseObservableObject { 私人字符串_countryName; 私人字符串_countryPop;

public string CountryName 
{ 
    get { return _countryName; } 
    set 
    { 
     _countryName = value; 
     OnPropertyChanged(); 
    } 
} 

public string CountryPop 
{ 
    get { return _countryPop; } 
    set 
    { 
     _countryPop = value; 
     OnPropertyChanged(); 
    } 
} 

public Country() { } 
public Country(string n, string d) 
{ 
    this.CountryName = n; 
    this.CountryPop = d; 
} 

} 希望它能幫助你。

問候，