背景

　　在很多的时候我们需要编辑DataGrid中每一个Cell，编辑后保存数据，原生的WPF中的DataGrid并没有提供这样的功能，今天通过一个具体的例子来实现这一个功能，在这个例子中DataGrid中的数据类型可能是多种多样的，有枚举、浮点类型、布尔类型、DateTime类型，每一种不同的类型需要双击以后呈现不同的效果，本文通过使用Xceed.Wpf.DataGrid这个动态控件库来实现这个功能，当前使用的Dll版本是2.5.0.0，不同的版本可能实现上面有差别，这个在使用的时候需要特别注意。

Demo预览

代码结构

　　代码还是按照常规的MVVM结构来进行编写，主要包括Views、Models、MainWindowViewModel、Converters这些常规的结构，在介绍这些之前来说一下我们的整体结构，在Demo中我们准备了一个四行三列的DataGrid，其中第一列主要是表示当前行的名称、后面的Step列是根据代码动态进行添加的，这个Step部分是我们通过代码动态调整的，调整完成后能够将数据保存到数据源中，我们还是按照MVVM的结构来进行进行代码的介绍。

　　1 MainWindow

<Window x:Class="DataGridCellDoubleClickDemo.MainWindow"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:xceed="http://schemas.xceed.com/wpf/xaml/datagrid"xmlns:models="clr-namespace:DataGridCellDoubleClickDemo.Models"xmlns:views="clr-namespace:DataGridCellDoubleClickDemo.Views"mc:Ignorable="d"Title="DataGridDemo" Height="450" Width="800"><Window.Resources><DataTemplate x:Key="CustomTemplate"><Border BorderThickness="1" BorderBrush="Blue"><TextBlock Text="{Binding Path=Display }" FontWeight="Bold"HorizontalAlignment="Stretch" VerticalAlignment="Stretch" /></Border></DataTemplate><DataTemplate x:Key="RowHeadTemplate" DataType="{x:Type models:RecipeControlVariable}"><TextBlock Text="{Binding DisplayName}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Foreground="Black" FontSize="12"/></DataTemplate><xceed:DataGridCollectionViewSource x:Key="recipeData" Source="{Binding RecipeVariables}"></xceed:DataGridCollectionViewSource></Window.Resources><Grid><xceed:DataGridControl x:Name="DataGridControl"AutoCreateColumns="False"FontSize="13"VerticalContentAlignment="Center"BorderBrush="Gray"BorderThickness="1"ItemsPrimaryAxis="Horizontal"PagingBehavior="LeftToRight"UpdateSourceTrigger="CellContentChanged"SelectionUnit="Cell"SelectionMode="Single"ItemsSource="{Binding Source={StaticResource recipeData}}"><xceed:DataGridControl.View><xceed:TableflowView FixedColumnCount="1" ContainerHeight="30" x:Name="tblView"VerticalGridLineThickness="0.5" HorizontalGridLineBrush="Gray"HorizontalGridLineThickness="1" VerticalGridLineBrush="Black"RowFadeInAnimationDuration="0"ScrollingAnimationDuration="0" ColumnStretchMinWidth="10"DetailIndicatorWidth="20" ShowRowSelectorPane="False"ShowScrollTip="False" UseDefaultHeadersFooters="False"><xceed:TableflowView.FixedHeaders><DataTemplate><xceed:ColumnManagerRow AllowColumnReorder="False" AllowColumnResize="True" AllowDrop="False" AllowSort="False" /></DataTemplate></xceed:TableflowView.FixedHeaders></xceed:TableflowView></xceed:DataGridControl.View><xceed:DataGridControl.DefaultCellEditors><xceed:CellEditor x:Key="{x:Type models:SmartCellViewModel}"><xceed:CellEditor.EditTemplate><DataTemplate><views:SmartCellEditor Content="{xceed:CellEditorBinding}" VerticalAlignment="Center"Height="{Binding ActualHeight,RelativeSource={RelativeSource AncestorType={x:Type Border},AncestorLevel=1}}"></views:SmartCellEditor></DataTemplate></xceed:CellEditor.EditTemplate></xceed:CellEditor></xceed:DataGridControl.DefaultCellEditors></xceed:DataGridControl></Grid></Window>

　　在View部分主要是通过引用Xceed中的DataGridControl控件进行扩展的，这个里面主要是需要设置DataGridControl的View和DefaultCellEditor这个里面DefaultCellEditor是本文的重点，这个就是单元格Cell双击后进行编辑的主体，在这个里面我们需要指定CellEditor的EditTemplate,这里面需要匹配一个DataTemplate,这个里面是一个SmartCellEditor的子View，下面我们来看看这个SmartCellEditor里面是什么内容？

　　2SmartCellEditor

<UserControl x:Class="DataGridCellDoubleClickDemo.Views.SmartCellEditor"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:conv="clr-namespace:DataGridCellDoubleClickDemo.Converters"xmlns:xceed="clr-namespace:Xceed.Wpf.Toolkit;assembly=Xceed.Wpf.Toolkit"mc:Ignorable="d"d:DesignHeight="450" d:DesignWidth="800"><UserControl.Resources><conv:VisibilityConverter x:Key="visConverter" /><conv:TimeSpanConverter x:Key="timeSpanConverter" /><conv:NumConverter x:Key="numConverter" /><conv:BoolConverter x:Key="boolConverter" /></UserControl.Resources><StackPanel Margin="0"><!--TextBlock--><TextBlock x:Name="textBlock"Background="{Binding Background}"Foreground="{Binding Foreground}"Text="{Binding Path=Display,Mode=OneWay}"ToolTip="{Binding ToolTip}"FontWeight="{Binding FontWeight}"VerticalAlignment="Stretch"Visibility="{Binding Path=., Converter={StaticResource visConverter},ConverterParameter=TextBlock}"/><!--Editable ComboBox--><ComboBox x:Name="editableComboBox" ItemsSource="{Binding SmartCellData.Selections}" IsEditable="True" VerticalAlignment="Stretch" VerticalContentAlignment="Center"DisplayMemberPath="SelectionDisplayName" Text="{Binding CellValue,Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"Visibility="{Binding Path=., Converter={StaticResource visConverter},ConverterParameter=EditableComboBox}" /><!--Readonly ComboBox--><ComboBox x:Name="readonlyComboBox" VerticalAlignment="Center" VerticalContentAlignment="Stretch" ItemsSource="{Binding SmartCellData.Selections}" IsEditable="False"DisplayMemberPath="SelectionDisplayName" SelectedValuePath="ControlName" SelectedValue="{Binding Path=CellValue,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"Visibility="{Binding Path=., Converter={StaticResource visConverter},ConverterParameter=ReadonlyComboBox}" /><!--Text Input TextBox--><TextBox HorizontalContentAlignment="Left" VerticalAlignment="Stretch" VerticalContentAlignment="Center" Text="{Binding CellValue}"Visibility="{Binding Path=., Converter={StaticResource visConverter},ConverterParameter=TextBox}" TextAlignment="Left" /><!--Number Input TextBox--><xceed:DecimalUpDown HorizontalContentAlignment="Left" VerticalAlignment="Stretch" VerticalContentAlignment="Center" FormatString="G" Value="{Binding Path=CellValue,Converter={StaticResource numConverter},Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"Increment="1" Visibility="{Binding Path=., Converter={StaticResource visConverter},ConverterParameter=DecimalUpDown}" TextAlignment="Left" /><!--CheckBox--><CheckBox x:Name="checkBox" VerticalAlignment="Stretch" VerticalContentAlignment="Center" Content="{Binding Tag}" IsChecked="{Binding Path=CellValue,Converter={StaticResource boolConverter},Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"Visibility="{Binding Path=., Converter={StaticResource visConverter},ConverterParameter=CheckBox}" /><!--TimePicker--><xceed:DateTimeUpDown Format="Custom" FormatString="HH:mm:ss" VerticalAlignment="Stretch" VerticalContentAlignment="Center" Value="{Binding Path=CellValue,Converter={StaticResource timeSpanConverter},Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"Visibility="{Binding Path=., Converter={StaticResource visConverter},ConverterParameter=TimePicker}" CultureInfo="uk-UA" /></StackPanel></UserControl>

　　在这个里面我们在一个StackPanel中放置了匹配各种数据类型的Template,并且每一个的Visibility都是由visConverter这个自定义的Converter来实现的，后面我们会分析这个Converter里面的内容，这些代码的整体思想就是每次这个StackPanel里面的Template都只有一个可以显示，其它的都是隐藏的，哪一个会显示是根据当前的数据类型决定的，每一个注释表示每一个类型的数据，比如我们如果定义的是Bool类型，那么当我们双击单元格Cell的时候会出现一个CheckBox供我们编辑，所以这个里面我们需要根据我们定义的数据类型来扩展对应的模板，当我们双击单元格的时候就会显示这个模板从而进行编辑数据。

　　3 MainWindowViewModel

这个里面是定义的MainWindow对应的DataContext,在这里面我们会初始化绑定到MainWindow中DataGridControl的ItemsSource,我们先来看看这个里面核心的代码并就其中的要点进行分析。

using DataGridCellDoubleClickDemo.Models;using System;using System.Collections.ObjectModel;using System.Windows;namespace DataGridCellDoubleClickDemo{public class MainWindowViewModel : NotificationObject{public MainWindowViewModel(Xceed.Wpf.DataGrid.DataGridControl dataGridControl){DataGridControl = dataGridControl;InitRecipeVariables();}#region Propertiesprivate ObservableCollection<RecipeControlVariable> _RecipeVariables = new ObservableCollection<RecipeControlVariable>();public ObservableCollection<RecipeControlVariable> RecipeVariables{get { return _RecipeVariables; }set{if (value != _RecipeVariables){_RecipeVariables = value;OnPropertyChanged(nameof(RecipeVariables));}}}public Xceed.Wpf.DataGrid.DataGridControl DataGridControl { get; set; }#endregion#region Private Methodsprivate void InitRecipeVariables(){_RecipeVariables.Add(new RecipeControlVariable{ControlName = "Name",DisplayName = "Name",StepValues = new ObservableCollection<SmartCellViewModel>{new SmartCellViewModel{CellValue="Step",ErrorInfo=null,SmartCellData=new RecipeVariableItem{ControlName = "Name",DisplayName = "Name",VariableEditorType=RecipeVariableEditorType.TextInput}},new SmartCellViewModel{CellValue="Step",ErrorInfo=null,SmartCellData=new RecipeVariableItem{ControlName = "Name",DisplayName = "Name",VariableEditorType=RecipeVariableEditorType.TextInput}}}});_RecipeVariables.Add(new RecipeControlVariable{ControlName = "Time",DisplayName = "Process Time(Sec)",StepValues = new ObservableCollection<SmartCellViewModel>{new SmartCellViewModel{CellValue="0",ErrorInfo=null,SmartCellData=new RecipeVariableItem{ControlName = "Time",DisplayName = "Process Time(Sec)",VariableEditorType=RecipeVariableEditorType.NumInput}},new SmartCellViewModel{CellValue="0",ErrorInfo=null,SmartCellData=new RecipeVariableItem{ControlName = "Time",DisplayName = "Process Time(Sec)",VariableEditorType=RecipeVariableEditorType.NumInput}}}});_RecipeVariables.Add(new RecipeControlVariable{ControlName = "FrontChemical",DisplayName = "FrontChemical",StepValues = new ObservableCollection<SmartCellViewModel>{new SmartCellViewModel{CellValue="None",ErrorInfo=null,SmartCellData=new RecipeVariableItem{ControlName = "FrontChemical",DisplayName = "FrontChemical",VariableEditorType=RecipeVariableEditorType.ReadOnlySelection,Selections=new ObservableCollection<SelectionItem>{new SelectionItem{SelectionControlName="CHEM1",SelectionDisplayName="CHEM1",},new SelectionItem{SelectionControlName="N2",SelectionDisplayName="N2",},new SelectionItem{SelectionControlName="CDIW",SelectionDisplayName="CDIW",},new SelectionItem{SelectionControlName="",SelectionDisplayName="None",}}}},new SmartCellViewModel{CellValue="None",ErrorInfo=null,SmartCellData=new RecipeVariableItem{ControlName = "FrontChemical",DisplayName = "FrontChemical",VariableEditorType=RecipeVariableEditorType.ReadOnlySelection,Selections=new ObservableCollection<SelectionItem>{new SelectionItem{SelectionControlName="CHEM1",SelectionDisplayName="CHEM1",},new SelectionItem{SelectionControlName="N2",SelectionDisplayName="N2",},new SelectionItem{SelectionControlName="CDIW",SelectionDisplayName="CDIW",},new SelectionItem{SelectionControlName="",SelectionDisplayName="None",}}}}}});_RecipeVariables.Add(new RecipeControlVariable{ControlName = "NozzleBindingSetting",DisplayName = "Nozzle Scan",StepValues = new ObservableCollection<SmartCellViewModel>{new SmartCellViewModel{CellValue="Default",ErrorInfo=null,SmartCellData=new RecipeVariableItem{ControlName = "NozzleBindingSetting",DisplayName = "Nozzle Scan",VariableEditorType=RecipeVariableEditorType.TextInput}},new SmartCellViewModel{CellValue="Default",ErrorInfo=null,SmartCellData=new RecipeVariableItem{ControlName = "NozzleBindingSetting",DisplayName = "Nozzle Scan",VariableEditorType=RecipeVariableEditorType.TextInput}}}});}#endregion/// <summary>/// reload datagrid content/// </summary>public void RefreshDataGrid(){try{if (null == DataGridControl) return;//generate columns in GridDataGridControl.CurrentColumn = null;if (DataGridControl.Columns.Count > 0)DataGridControl.Columns.Clear();var template = (DataTemplate)this.DataGridControl.FindResource("CustomTemplate");var rowTemplate = (DataTemplate)this.DataGridControl.FindResource("RowHeadTemplate");DataGridControl.Columns.Add(new Xceed.Wpf.DataGrid.Column(){Width = 140,Title = "Name",FieldName = ".",CellContentTemplate = rowTemplate});var cellEditor = DataGridControl.DefaultCellEditors[typeof(SmartCellViewModel)];for (int index = 0; index < RecipeVariables[0].StepValues.Count; index++){int width = 1;for (int n = 0; n < RecipeVariables.Count; n++){string display = RecipeVariables[n].StepValues[index].Display;if (!string.IsNullOrWhiteSpace(display)){int temp = display.Length * 7;width = Math.Max(temp, width);}}width = (int)(width * 1.1);width = Math.Max(width, 80);DataGridControl.Columns.Add(new Xceed.Wpf.DataGrid.Column(){Title = string.Format("Step {0}", index + 1),FieldName = string.Format("StepValues[{0}]", index),CellContentTemplate = template,AllowSort = false,Width = width,MaxWidth = width * 2,CellEditor = cellEditor});}}catch (Exception ex){}

　　在这个里面我们重点分析下RefreshDataGrid这个子函数，在我们的MainWindowViewModel中我们定义的RecipeVariables是最终绑定到MainWindow中定义的DataGridControl中的ItemsSource,是整个控件的数据源，由于我们这个DataGird的第一列和后面的Step列数据类型不同，所以我们的RefreshDataGrid函数中增加Column列的时候是分作两个部分，第一个部分是单独增加一列，后面的列是通过循环StepValues这个集合来动态进行增加的，代码中我们定义了多少个StepValue，那么后面就会有多少列，这个里面的重点是增加Column的时候FieldName的赋值，这个是十分关键的，这个关系到能够让每一列获取到正确的数据源，例如第一列赋值Filed= “.” 表示直接从当前绑定的数据源获取数据，另外后面的Step列的每一个FieldName是动态进行赋值的，赋值语句是：FieldName = string.Format("StepValues[{0}]", index),这个里面Index是一个动态值，这个是非常关键的一步，另外后面的Step列由于需要通过双击进行编辑所以每一个Column是需要赋值CellEditor对象的，另外这个ViewModel中的DataGridControl是通过构造函数进行赋值的，构造函数中的赋值就是MainWindow中定义的DataGridControl对象，这个在阅读代码时需要特别注意。

　　4 Models

Models主要是定义的数据集合，我们的代码中主要包括RecipeControlVariable和SmartViewModel这两个部分，这两个部分分别对应DataGridControl的数据源以及双击进行编辑的SmartCellEditor两个部分一一对应。

　　更多代码方面的细节需要仔细去分析阅读源码，需要源码请点击此处进行下载。

以上就是c# WPF中通过双击编辑DataGrid中Cell的示例(附源码)的详细内容，更多关于c# wpf双击编辑DataGrid的资料请关注其它相关文章！