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我是WPF的新手。我努力了一個星期，在點擊按鈕的datagrid中添加一行。WPF Datagrid雙向綁定：點擊按鈕添加行
我的數據網格被綁定到ObservableCollection<FilterCriteria> FilterCriteriaList
對不起，添加這樣的長度的代碼。作爲WPF的新手，我不確定我在這裏錯過了什麼。因此，試圖提供儘可能多的信息可能
這是我FilterCriteria類
public class FilterCriteria : INotifyPropertyChanged
{
private NORTHWNDEntities context = new NORTHWNDEntities();
private string columnName;
public string ColumnName
{
get
{
return columnName;
}
set
{
columnName = value;
RaisePropertyChanged("ColumnName");
}
}
private string _operator;
public string Operator
{
get
{
return _operator;
}
set
{
_operator = value;
RaisePropertyChanged("Operator");
}
}
private string inputValue;
public string InputValue
{
get
{
return inputValue;
}
set
{
inputValue = value;
RaisePropertyChanged("InputValue");
}
}
private string selectedTable;
public string SelectedTable
{
get
{
return selectedTable;
}
set
{
selectedTable = value;
RaisePropertyChanged("SelectedTable");
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected void RaisePropertyChanged([CallerMemberName]string propertyName = "")
{
var handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
這是我的ViewModel代碼
public class ExportTablesViewModel : INotifyPropertyChanged
{
private NORTHWNDEntities context = new NORTHWNDEntities();
private ObservableCollection<DatabaseTable> tableNameList;
public ObservableCollection<DatabaseTable> TableNameList
{
get
{
return tableNameList;
}
set
{
tableNameList = value;
RaisePropertyChanged("TableNameList");
}
}
private ObservableCollection<string> selectedTableColumnList;
public ObservableCollection<string> SelectedTableColumnList
{
get
{
return selectedTableColumnList;
}
set
{
selectedTableColumnList = value;
RaisePropertyChanged("SelectedTableColumnList");
}
}
private ObservableCollection<FilterCriteria> filterCriteriaList;
public ObservableCollection<FilterCriteria> FilterCriteriaList
{
get
{
return filterCriteriaList;
}
set
{
filterCriteriaList = value;
RaisePropertyChanged("FilterCriteriaList");
}
}
private string selectedTableName;
public string SelectedTableName
{
get
{
return selectedTableName;
}
set
{
selectedTableName = value;
RaisePropertyChanged("SelectedTableName");
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected void RaisePropertyChanged([CallerMemberName]string propertyName = "")
{
var handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
這是電網XAML代碼：
<DataGrid x:Name="dataGridFilters" CanUserAddRows="True" ItemsSource="{Binding FilterCriteriaList}" AutoGenerateColumns="False" HorizontalAlignment="Left" Margin="313,31,0,0" VerticalAlignment="Top" Height="261" Width="679">
<DataGrid.Columns>
<DataGridTemplateColumn Header="Column">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ComboBox x:Name="ComboBoxColumnName" ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.SelectedTableColumnList}"
SelectedValue="{Binding Path=ColumnName,Mode =TwoWay,UpdateSourceTrigger=PropertyChanged, NotifyOnTargetUpdated=True,NotifyOnSourceUpdated=True}" SelectedValuePath="ColumnName"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<DataGridTemplateColumn Header="Operator">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBox x:Name="TextBoxOperator" Text="{Binding Path=Operator,Mode =TwoWay,UpdateSourceTrigger=PropertyChanged, NotifyOnTargetUpdated=True,NotifyOnSourceUpdated=True}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
<DataGridTemplateColumn Header="Value">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBox x:Name="TextBoxInputValue" Text="{Binding Path=InputValue,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged, NotifyOnTargetUpdated=True,NotifyOnSourceUpdated=True}"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
<Button x:Name="buttonAddFilter" Content="+" HorizontalAlignment="Left" Margin="958,76,0,0" VerticalAlignment="Top" Width="34" RenderTransformOrigin="0.5,0.5" Click="buttonAddFilter_Click">
</Button>
點擊按鈕，我試圖在網格中添加該行。爲此，我在buttonAddFilter_Click事件中添加了viewModel.FilterCriteriaList.Add(new FilterCriteria());。此代碼作爲數據網格中的新行添加。但是當我在新增行中輸入一些值時。它不會被添加到FilterCriteriaList集合
請讓我知道，如何對新添加的行進行雙向綁定？