如何在WPF中获取DevExpress GridControl的选定行值？

时间：2015-09-04 08:52:02

标签： c# wpf devexpress gridcontrol

我在2012年10月问到this问题，当时我正在开发Windows应用程序。现在，当我转向WPF应用程序时，我再次遇到同样的问题，即如何在 WPF 中获取DevExpress GridControl的选定行值？我在谷歌找不到答案，上面提到的链接中没有一个答案正常。在wpf的devexpress gridcontrol中没有像CellClick，RowClick或RowCellClick事件那样，因为它在winform gridcontrol中。如果有人能解决这个问题，我会很高兴

修改

我已经在您的答案中更新了我的应用程序所需的命名空间，但问题仍然存在。我在

中遇到了拖拽错误 
<Window x:Class="Namespace.MainWindow"
 ...
 x:Name="ololo"
        Height="400" Width="500">
 .....    
<StackPanel Orientation="Horizontal">
            <StackPanel x:Name="Left" Orientation="Vertical">
                <Button Margin="0,10,0,0" Command="{Binding HideCommand}">Hide</Button>
            </StackPanel>
            <StackPanel x:Name="Right" Orientation="Vertical">
            <!--<Controls>-->
            </StackPanel>
    </StackPanel>

1-类型＆＃39; dxmvvm：ViewModelSource＆＃39;＆＃34;在dxmvvm中找不到：ViewModelSource

2- name＆＃34; EntitiesViewModel＆＃34;命名空间中不存在＆＃34; clr-namespace：DXApplication1＆＃34;

我的申请编码如下

XAML 

<Grid.DataContext>
        <dxmvvm:ViewModelSource Type="{x:Type local:EntitiesViewModel}"/>
    </Grid.DataContext>

EntitiesViewModel 

<dx:DXWindow
    x:Class="DXApplication1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:DXApplication1"
    xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core"
    xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"
    xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
    xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm"
    Title="DXApplication" Height="700" Width="1100"
    SnapsToDevicePixels="True" UseLayoutRounding="True">

    <dx:DXWindow.Resources>
    </dx:DXWindow.Resources>

    <Grid Margin="12">
        <Grid.DataContext>
            <dxmvvm:ViewModelSource Type="{x:Type local:EntitiesViewModel}"/>
        </Grid.DataContext>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>
        <Grid Grid.Row="0" Margin="0,0,0,8">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="Auto"/>
                <ColumnDefinition Width="8"/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>
            <Grid.RowDefinitions>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
                <RowDefinition Height="Auto"/>
            </Grid.RowDefinitions>
            <Label Content="Item1" Grid.Row="0" VerticalAlignment="Center"/>
            <Label Content="Item2" Grid.Row="1" VerticalAlignment="Center"/>
            <Label Content="Item3" Grid.Row="2" VerticalAlignment="Center"/>
            <dxe:TextEdit Text="{Binding SelectedEntity.Item1}" Grid.Row="0" Grid.Column="2"/>
            <dxe:TextEdit Text="{Binding SelectedEntity.Item2}" Grid.Row="1" Grid.Column="2"/>
            <dxe:TextEdit Text="{Binding SelectedEntity.Item3}" Grid.Row="2" Grid.Column="2"/>
        </Grid>
        <dxg:GridControl Grid.Row="1" 
                     AutoGenerateColumns="None" 
                     ItemsSource="{Binding Entities}"
                     SelectedItem="{Binding SelectedEntity}">
            <dxg:GridControl.Columns>
                <dxg:GridColumn FieldName="Item1"/>
                <dxg:GridColumn FieldName="Item2"/>
                <dxg:GridColumn FieldName="Item3"/>
            </dxg:GridControl.Columns>
            <dxg:GridControl.View>
                <dxg:TableView ShowTotalSummary="True" AllowEditing="False"/>
            </dxg:GridControl.View>
        </dxg:GridControl>
    </Grid>
</dx:DXWindow>

库，错误，类等的图像

enter image description here

4 个答案:

答案 0 :(得分：2)

您可以使用DataControlBase.CurrentItemChanged活动 这是一个例子：
的 WPF： 

<dxg:GridControl x:Name="gridControl1" ItemsSource="{Binding Data}" CurrentItemChanged="gridControl1_CurrentItemChanged">
</dxg:GridControl>

事件处理程序： 

private void gridControl1_CurrentItemChanged(object sender, CurrentItemChangedEventArgs e)
{
    TBGRNo.Text = gridControl1.GetFocusedRowCellValue("GRNo").ToString();
    TBSName.Text = gridControl1.GetFocusedRowCellValue("SName").ToString();
    TBFName.Text = gridControl1.GetFocusedRowCellValue("FName").ToString();    
}

答案 1 :(得分：0)

查看Devexpress主页文档中的选择主题： Grid Selection Topic

如果您正在使用MVVM模式，您还应该看一下 SelectedItems Property。 这里的示例显示了如何绑定到选定的项目：

In [113]:
# load your data, you can ignore this step
t="""time,ActivePowerkW,WindSpeedms,WindSpeedmsstd
2015-05-26 11:40:00,836.6328,8.234862,1.414558
2015-05-26 11:50:00,968.5992,8.761620,1.572579
2015-05-26 12:30:00,614.0503,7.267871,1.575504
2015-05-26 13:50:00,945.5604,8.709115,1.527079
2015-05-26 14:00:00,926.6531,8.538967,1.589221
2015-05-26 14:30:00,666.7984,7.590645,1.324495
2015-05-26 14:40:00,911.0134,8.466603,1.708189  
2015-05-26 15:10:00,1256.1740,9.868224,1.636775  
2015-05-26 15:30:00,1706.7070,11.225540,1.576277"""
df = pd.read_csv(io.StringIO(t), parse_dates=[0], index_col=[0])
df
Out[113]:
                     ActivePowerkW  WindSpeedms  WindSpeedmsstd
time                                                           
2015-05-26 11:40:00       836.6328     8.234862        1.414558
2015-05-26 11:50:00       968.5992     8.761620        1.572579
2015-05-26 12:30:00       614.0503     7.267871        1.575504
2015-05-26 13:50:00       945.5604     8.709115        1.527079
2015-05-26 14:00:00       926.6531     8.538967        1.589221
2015-05-26 14:30:00       666.7984     7.590645        1.324495
2015-05-26 14:40:00       911.0134     8.466603        1.708189
2015-05-26 15:10:00      1256.1740     9.868224        1.636775
2015-05-26 15:30:00      1706.7070    11.225540        1.576277

In [115]:
# create your timeseries
timeseries_comp = pd.date_range(df.index[0], df.index[len(df)-1], freq='10min')
timeseries_comp
Out[115]:
DatetimeIndex(['2015-05-26 11:40:00', '2015-05-26 11:50:00',
               '2015-05-26 12:00:00', '2015-05-26 12:10:00',
               '2015-05-26 12:20:00', '2015-05-26 12:30:00',
               '2015-05-26 12:40:00', '2015-05-26 12:50:00',
               '2015-05-26 13:00:00', '2015-05-26 13:10:00',
               '2015-05-26 13:20:00', '2015-05-26 13:30:00',
               '2015-05-26 13:40:00', '2015-05-26 13:50:00',
               '2015-05-26 14:00:00', '2015-05-26 14:10:00',
               '2015-05-26 14:20:00', '2015-05-26 14:30:00',
               '2015-05-26 14:40:00', '2015-05-26 14:50:00',
               '2015-05-26 15:00:00', '2015-05-26 15:10:00',
               '2015-05-26 15:20:00', '2015-05-26 15:30:00'],
              dtype='datetime64[ns]', freq='10T', tz=None)

In [120]:
# reindex
new_df = df.reindex(timeseries_comp)
# group on hour and minute, you can group on some other resolution
new_df.groupby([new_df.index.hour, new_df.index.minute]).apply(pd.Series.isnull).sum()
Out[120]:
ActivePowerkW     15
WindSpeedms       15
WindSpeedmsstd    15
dtype: int64

答案 2 :(得分：0)

我发现解决方案如下

<Grid>
    <dxg:GridControl Name="gridcontrol" AutoGenerateColumns="AddNew" HorizontalAlignment="Left" Margin="23,139,0,0" VerticalAlignment="Top" Height="315" Width="575">
        <dxg:GridControl.Columns>
            <dxg:GridColumn FieldName="Item1"/>
            <dxg:GridColumn FieldName="Item2"/>
            <dxg:GridColumn FieldName="Item3"/>
        </dxg:GridControl.Columns>
        <dxg:GridControl.View>
            <dxg:TableView Name="gridview" ShowTotalSummary="True" AllowEditing="False"/>
        </dxg:GridControl.View>
    </dxg:GridControl>
    <dxe:TextEdit Name="TBItem1" Text="{Binding SelectedItem.Item1, ElementName=gridcontrol, Mode=OneWay}" HorizontalAlignment="Left" Margin="124,10,0,0" VerticalAlignment="Top" Width="150"/>
    <dxe:TextEdit Name="TBItem2" Text="{Binding SelectedItem.Item2, ElementName=gridcontrol, Mode=OneWay}" HorizontalAlignment="Left" Margin="124,49,0,0" VerticalAlignment="Top" Width="150"/>
    <dxe:TextEdit Name="TBItem3" Text="{Binding SelectedItem.Item3, ElementName=gridcontrol, Mode=OneWay}" HorizontalAlignment="Left" Margin="124,84,0,0" VerticalAlignment="Top" Width="150"/>
    <Label Content="Item1" HorizontalAlignment="Left" Margin="61,10,0,0" VerticalAlignment="Top" Width="48"/>
    <Label Content="Item2" HorizontalAlignment="Left" Margin="61,49,0,0" VerticalAlignment="Top"/>
    <Label Content="Item3" HorizontalAlignment="Left" Margin="61,80,0,0" VerticalAlignment="Top"/>
</Grid>

答案 3 :(得分：0)

据我所知，您想要显示实体列表，然后提供用于选择其中一个权限的UI（通过gridcontrol），并在单独的视图中编辑所选实体属性（通过文本编辑器）。

所以，我建议你使用MVVM方法。而且，由于您已经在使用DevExpress控件，我建议您使用DevExpress MVVM Framework尽可能简化MVVM。

步骤1：定义一个ViewModel类，其中包含通过Entities属性提供的实体集合（您可以根据需要以所需的方式加载这些实体，并在需要时）并提供{{1 property：

SelectedEntity

步骤2：按如下方式定义视图布局：

public class EntitiesViewModel {
    public EntitiesViewModel() {
        LoadEntities();
    }
    void LoadEntities() {
        Entities = new ObservableCollection<Entity>
        {
            new Entity(){ Item1="A", Item2="A0", Item3="A00"},
            new Entity(){ Item1="B", Item2="B0", Item3="B00"},
            new Entity(){ Item1="C", Item2="C0", Item3="C00"},
        };
    }
    public ObservableCollection<Entity> Entities { get; private set; }
    public virtual Entity SelectedEntity { get; set; } // Bindable property
}
public class Entity {
    public string Item1 { get; set; }
    public string Item2 { get; set; }
    public string Item3 { get; set; }
}

*主要兴趣点和技巧是：
1）通过ViewModelSource创建... xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:DXApplication1" xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core" xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors" xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid" xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm" ... <Grid Margin="12"> <Grid.DataContext> <dxmvvm:ViewModelSource Type="{x:Type local:EntitiesViewModel}"/> </Grid.DataContext> <Grid.RowDefinitions> <RowDefinition Height="Auto"/> <RowDefinition Height="*"/> </Grid.RowDefinitions> <Grid Grid.Row="0" Margin="0,0,0,8"> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto"/> <ColumnDefinition Width="8"/> <ColumnDefinition Width="*"/> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="Auto"/> <RowDefinition Height="Auto"/> <RowDefinition Height="Auto"/> </Grid.RowDefinitions> <Label Content="Item1" Grid.Row="0" VerticalAlignment="Center"/> <Label Content="Item2" Grid.Row="1" VerticalAlignment="Center"/> <Label Content="Item3" Grid.Row="2" VerticalAlignment="Center"/> <dxe:TextEdit Text="{Binding SelectedEntity.Item1}" Grid.Row="0" Grid.Column="2"/> <dxe:TextEdit Text="{Binding SelectedEntity.Item2}" Grid.Row="1" Grid.Column="2"/> <dxe:TextEdit Text="{Binding SelectedEntity.Item3}" Grid.Row="2" Grid.Column="2"/> </Grid> <dxg:GridControl Grid.Row="1" AutoGenerateColumns="None" ItemsSource="{Binding Entities}" SelectedItem="{Binding SelectedEntity}"> <dxg:GridControl.Columns> <dxg:GridColumn FieldName="Item1"/> <dxg:GridColumn FieldName="Item2"/> <dxg:GridColumn FieldName="Item3"/> </dxg:GridControl.Columns> <dxg:GridControl.View> <dxg:TableView ShowTotalSummary="True" AllowEditing="False"/> </dxg:GridControl.View> </dxg:GridControl> </Grid> 实例。这种方式允许您不在ViewModel级别实现EntitiesViewModel接口 - 您可以将INotifyPropertyChanged属性声明为SelectedEntity并将所有脏工作委托给POCO mechanism ：

virtual

2）所有View'控件绑定都“查找”到DataContext（包含我们的ViewModel）：

<dxmvvm:ViewModelSource Type="{x:Type local:EntitiesViewModel}"/>

这种方式允许您将所有UI控件相互分离，并轻松修改视图。

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