如何使用C#代碼實現(xiàn)DataTemplate

作者：佚名 2009-03-12 13:49:30

不得不說DataTemplate是WPF中的一項重要技術(shù)組成，可以方便讓我們實現(xiàn)各種各樣的UI樣式，大大豐富了應用程序的界面設計。

不得不說DataTemplate是WPF中的一項重要技術(shù)組成，可以方便讓我們實現(xiàn)各種各樣的UI樣式，大大豐富了應用程序的界面設計。通常我們都會在XAML文件中定義出具體的DataTemplate, 我舉一個ListView的例子：

<ListView IsSynchronizedWithCurrentItem="True" Background="#FFFFFFFF" 
Foreground="White" ItemsSource="{Binding}" Style="{DynamicResource 
SuperListViewStyle}" ItemContainerStyleSelector="{StaticResource 
listViewItemStyleSelector}" x:Name="lvExecutionTable" >
                        <ListView.View>
                            <GridView>
                                <GridViewColumn>
                                    <GridViewColumn.CellTemplate>
                                        <DataTemplate>
                                            <CheckBox HorizontalAlignment="Center" 
IsChecked="{Binding Path=IsSelected}"/>
                                        </DataTemplate>
                                    </GridViewColumn.CellTemplate>
                                    <GridViewColumnHeader Content="選擇" 
Tag="IsSelected"/>
                                </GridViewColumn>
                                <GridViewColumn>
                                    <GridViewColumn.CellTemplate>
                                        <DataTemplate>
                                            <TextBlock Text="{Binding 
Path=IsComfirmed, Converter={StaticResource IsComfirmedConverter}}" 
Foreground="{Binding Path=IsComfirmed, Converter={StaticResource 
IsComfirmedToColorConverter}}"/>
                                        </DataTemplate>
                                    </GridViewColumn.CellTemplate>
                                    <GridViewColumnHeader Content="確認狀態(tài)" 
Tag="IsComfirmed"/>
                                </GridViewColumn>
                                <GridViewColumn DisplayMemberBinding="{Binding 
Path=MarketIndicator}">
                                    <GridViewColumnHeader Content="市場類型" 
Tag="MarketIndicator"/>
                                </GridViewColumn>
                                <GridViewColumn>
                                    <GridViewColumn.CellTemplate>
                                        <DataTemplate>
                                            <TextBlock Text="{Binding 
Path=TradeType}"/>
                                        </DataTemplate>
                                    </GridViewColumn.CellTemplate>
                                    <GridViewColumnHeader Content="成交方式" 
Tag="TradeType"/>
                                </GridViewColumn>
                            </GridView>
                        </ListView.View>
                    </ListView>

例子中對每個Column定義了簡單的DataTemplate。我遇到的問題是如果這個List View需要動態(tài)編輯列，或者新加入一些列，就是如何用代碼來實現(xiàn)對控件的DataTemplate的操作。經(jīng)過查閱MSDN的相關文檔，最好找到了解決的辦法，如下：

GridViewColumn column = new GridViewColumn();
            GridViewColumnHeader h = new GridViewColumnHeader();
            h.Content = "??????";
            h.Tag = "*******";
            column.Header = h;
            DataTemplate dt = new DataTemplate();
            FrameworkElementFactory fef = new FrameworkElementFactory(typeof
(CheckBox));
            Binding binding = new Binding();
            binding.Path = new PropertyPath("MarketIndicator");
            fef.SetBinding(CheckBox.ContentProperty, binding);
            fef.SetValue(CheckBox.ForegroundProperty, Brushes.White);
            dt.VisualTree = fef;
            column.CellTemplate = dt;
            (this.lvExecutionTable.View as GridView).Columns.Add(column);

DataTemplate對象的VisualTree屬性的類型是FrameworkElementFactory，用來存放具體的Control。FrameworkElementFactory fef = new FrameworkElementFactory(typeof(CheckBox))語句定義了DataTemplate的頂層元素是一個CheckBox控件，使用fef.SetValue方法可以設置頂層元素的屬性，如綁定等等。如果你需要定義的DataTemplate不止一個層次，那么你就要花點時間去設置頂層元素的Content屬性。

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責任編輯：彭凡來源：博客園