本篇文章为大家展示了如何在PropertyGrid中自定义控件，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
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1.创建一个CustomPropertyGrid自定义控件：
该控件使用的资源字典如下：
2.编写对应的模板选择类 DynamicallyAssignDataEditorsTemplateSelector：
using DevExpress.Xpf.Editors;
using DevExpress.Xpf.PropertyGrid;
using System.ComponentModel;
using System.Reflection;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
namespace PropertyGridDemo.PropertyGridControl
{
public class DynamicallyAssignDataEditorsTemplateSelector : DataTemplateSelector
{
private PropertyDescriptor _property = null;
private RootPropertyDefinition _element = null;
private PropertyDataContext _propertyDataContext => App.PropertyGridDataContext;
///
/// 当重写在派生类中，返回根据自定义逻辑的 。
///
/// 数据对象可以选择模板。
/// 数据对象。
///
/// 返回 或 null。默认值为 null。
///
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
_element = (RootPropertyDefinition)container;
DataTemplate resource = TryCreateResource(item);
return resource ?? base.SelectTemplate(item, container);
}
///
/// Tries the create resource.
///
/// The item.
///
private DataTemplate TryCreateResource(object item)
{
if (!(item is PropertyDescriptor)) return null;
PropertyDescriptor pd = (PropertyDescriptor)item;
_property = pd;
var customUIAttribute = (CustomUIAttribute)pd.Attributes[typeof(CustomUIAttribute)];
if (customUIAttribute == null) return null;
var customUIType = customUIAttribute.CustomUI;
return CreatePropertyDefinitionTemplate(customUIAttribute);
}
///
/// Gets the data context.
///
/// Name of the data context property.
///
private object GetDataContext(string dataContextPropertyName)
{
PropertyInfo property = _propertyDataContext?.GetType().GetProperty(dataContextPropertyName);
if (property == null) return null;
return property.GetValue(_propertyDataContext, null);
}
///
/// Creates the slider data template.
///
/// The custom UI attribute.
///
private DataTemplate CreateSliderDataTemplate(CustomUIAttribute customUIAttribute)
{
DataTemplate ct = new DataTemplate();
ct.VisualTree = new FrameworkElementFactory(typeof(StackPanel));
ct.VisualTree.SetValue(StackPanel.DataContextProperty, GetDataContext(customUIAttribute.DataContextPropertyName));
FrameworkElementFactory sliderFactory = new FrameworkElementFactory(typeof(Slider));
sliderFactory.SetBinding(Slider.MaximumProperty, new Binding(nameof(SliderUIDataContext.Max)));
sliderFactory.SetBinding(Slider.MinimumProperty, new Binding(nameof(SliderUIDataContext.Min)));
sliderFactory.SetBinding(Slider.SmallChangeProperty, new Binding(nameof(SliderUIDataContext.SmallChange)));
sliderFactory.SetBinding(Slider.LargeChangeProperty, new Binding(nameof(SliderUIDataContext.LargeChange)));
sliderFactory.SetBinding(Slider.ValueProperty, new Binding(nameof(SliderUIDataContext.Value)));
ct.VisualTree.AppendChild(sliderFactory);
FrameworkElementFactory textFacotry = new FrameworkElementFactory(typeof(TextBlock), "TextBlock");
textFacotry.SetValue(TextBlock.TextProperty, new Binding(nameof(SliderUIDataContext.Value)));
//textBoxFactory.AddHandler(TextBox.IsVisibleChanged, new DependencyPropertyChangedEventHandler(SearchBoxVisibleChanged));
ct.VisualTree.AppendChild(textFacotry);
ct.Seal();
return ct;
}
///
/// Creates the ComboBox edit template.
///
/// The custom UI attribute.
///
private DataTemplate CreateComboBoxEditTemplate(CustomUIAttribute customUIAttribute)
{
DataTemplate template = new DataTemplate();
template.VisualTree = new FrameworkElementFactory(typeof(DockPanel));
template.VisualTree.SetValue(DockPanel.DataContextProperty, GetDataContext(customUIAttribute.DataContextPropertyName));
FrameworkElementFactory textFactory = new FrameworkElementFactory(typeof(TextBlock)) ;
textFactory.SetValue(TextBlock.TextProperty, new Binding(nameof(ComboBoxEditDataContext.Name)));
template.VisualTree.AppendChild(textFactory);
FrameworkElementFactory comboBoxEditFactory = new FrameworkElementFactory(typeof(ComboBoxEdit));
comboBoxEditFactory.SetBinding(ComboBoxEdit.ItemsSourceProperty, new Binding(nameof(ComboBoxEditDataContext.ItemSource)));
comboBoxEditFactory.SetBinding(ComboBoxEdit.EditValueProperty, new Binding(nameof(ComboBoxEditDataContext.EditValue)));
comboBoxEditFactory.SetBinding(ComboBoxEdit.SelectedIndexProperty, new Binding(nameof(ComboBoxEditDataContext.SelectedIndex)));
comboBoxEditFactory.SetValue(ComboBoxEdit.ItemTemplateProperty, (DataTemplate)_element.TryFindResource("ComboBoxEditItemTemplate"));
template.VisualTree.AppendChild(comboBoxEditFactory);
template.Seal();
return template;
}
///
/// Creates the property definition template.
///
/// The custom UI attribute.
///
private DataTemplate CreatePropertyDefinitionTemplate(CustomUIAttribute customUIAttribute)
{
DataTemplate dataTemplate = new DataTemplate();
DataTemplate cellTemplate = null;//单元格模板
FrameworkElementFactory factory = new FrameworkElementFactory(typeof(PropertyDefinition));
dataTemplate.VisualTree = factory;
switch (customUIAttribute.CustomUI)
{
case CustomUITypes.Slider:
cellTemplate = CreateSliderDataTemplate(customUIAttribute); break;
//cellTemplate = (DataTemplate)_element.TryFindResource("SliderTemplate");break;
case CustomUITypes.ComboBoxEit:
cellTemplate = CreateComboBoxEditTemplate(customUIAttribute);break;
}
if (cellTemplate != null)
{
factory.SetValue(PropertyDefinition.CellTemplateProperty, cellTemplate);
dataTemplate.Seal();
}
else
{
return null;
}
return dataTemplate;
}
}
}using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
namespace PropertyGridDemo.PropertyGridControl
{
///
///初始化所有属性并调用模板选择器进行匹配
///
public class DataEditorsViewModel
{
public IEnumerable Properties { get { return TypeDescriptor.GetProperties(typeof(TestPropertyGrid)).Cast(); } }
}
}3.编写一个可用于构建模板的属性 CustomUIType：
using System;
namespace PropertyGridDemo.PropertyGridControl
{
public class CustomUIType
{
}
public enum CustomUITypes
{
Slider,
ComboBoxEit,
SpinEdit,
CheckBoxEdit
}
[AttributeUsage(AttributeTargets.Property)]
internal class CustomUIAttribute : Attribute
{
public string DataContextPropertyName { get; set; }
public CustomUITypes CustomUI { get; set; }
///
/// 自定义控件属性构造函数
///
/// The UI types.
/// Name of the data context property.
internal CustomUIAttribute(CustomUITypes uiTypes, string dataContextPropertyName)
{
CustomUI = uiTypes;
DataContextPropertyName = dataContextPropertyName;
}
}
}4.编写对应的DataContext类 TestPropertyGrid:
using DevExpress.Mvvm.DataAnnotations;
using System;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Timers;
using System.Windows;
namespace PropertyGridDemo.PropertyGridControl
{
[MetadataType(typeof(DynamicallyAssignDataEditorsMetadata))]
public class TestPropertyGrid : PropertyDataContext
{
private double _count = 0;
private SliderUIDataContext _countSource = null;
private ComboBoxEditDataContext _comboSource = null;
private double _value=1;
public TestPropertyGrid()
{
Password = "1111111";
Notes = "Hello";
Text = "Hello hi";
}
[Browsable(false)]
public SliderUIDataContext CountSource
{
get
{
if (_countSource != null)
{
return _countSource;
}
else
{
_countSource = new SliderUIDataContext(0, 100, Count, 0.1, 1);
_countSource.PropertyChanged += (object o, PropertyChangedEventArgs e) =>
{
this.Count = _countSource.Value;
};
return _countSource;
}
}
}
[Browsable(false)]
public ComboBoxEditDataContext ComboSource
{
get
{
if(_comboSource==null)
{
_comboSource =new ComboBoxEditDataContext(ComboBoxEditItemSource.TestItemSource,Value);
_comboSource.PropertyChanged += (object o, PropertyChangedEventArgs e) =>
{
this.Value =Convert.ToDouble(_comboSource.EditValue.Item2);
};
}
return _comboSource;
}
}
[Display(Name = "SliderEdit", GroupName = "CustomUI")]
[CustomUI(CustomUITypes.Slider, nameof(CountSource))]
public double Count
{
get => _count;
set
{
_count = value;
CountSource.Value = value;
RaisePropertyChanged(nameof(Count));
}
}
[Display(Name = "ComboBoxEditItem", GroupName = "CustomUI")]
[CustomUI(CustomUITypes.ComboBoxEit, nameof(ComboSource))]
public double Value
{
get => _value;
set
{
if (_value == value) return;
_value = value;
//ComboSource.Value = value;
RaisePropertyChanged(nameof(Value));
}
}
[Display(Name = "Password", GroupName = "DefaultUI")]
public string Password { get; set; }
[Display(Name = "TextEdit", GroupName = "DefaultUI")]
public string Text { get; set; }
[Display(Name = "Notes", GroupName = "DefaultUI")]
public string Notes { get; set; }
[Display(Name = "Double", GroupName = "DefaultUI")]
[DefaultValue(1)]
public double TestDouble { get; set; }
[Display(Name = "Items", GroupName = "DefaultUI")]
[DefaultValue(Visibility.Visible)]
public Visibility TestItems { get; set; }
}
public static class DynamicallyAssignDataEditorsMetadata
{
public static void BuildMetadata(MetadataBuilder builder)
{
builder.Property(x => x.Password)
.PasswordDataType();
builder.Property(x => x.Notes)
.MultilineTextDataType();
}
}
}该类中用到的其他类主要有以下几个，以下几个类主要用于数据绑定：
namespace PropertyGridDemo.PropertyGridControl
{
public class SliderUIDataContext:PropertyDataContext
{
private double _value = 0;
private double _max = 0;
private double _min = 0;
private double _smallChange = 1;
private double _largeChange=1;
public SliderUIDataContext()
{
}
///
/// Initializes a new instance of the class.
///
/// The minimum.
/// The maximum.
/// The value.
/// The small change.
/// The large change.
public SliderUIDataContext(double min, double max, double value,double smallChange=0.01,double largeChange=0.1)
{
SmallChange = smallChange;
LargeChange = largeChange;
Max = max;
Min = min;
Value = value;
}
///
/// Gets or sets the small change.
///
///
/// The small change.
///
public double SmallChange
{
get => _smallChange;
set
{
if (value == _min) return;
_min = value;
RaisePropertyChanged(nameof(SmallChange));
}
}
///
/// Gets or sets the large change.
///
///
/// The large change.
///
public double LargeChange
{
get => _largeChange;
set
{
if (Value == _largeChange) return;
_largeChange = value;
RaisePropertyChanged(nameof(LargeChange));
}
}
///
/// Gets or sets the maximum.
///
///
/// The maximum.
///
public double Max
{
get => _max;
set
{
if (value == _max) return;
_max = value;
RaisePropertyChanged(nameof(Max));
}
}
///
/// Gets or sets the minimum.
///
///
/// The minimum.
///
public double Min
{
get => _min;
set
{
if (value == _min) return;
_min = value;
RaisePropertyChanged(nameof(Min));
}
}
///
/// Gets or sets the value.
///
///
/// The value.
///
public double Value
{
get => _value;
set
{
if (value == _value) return;
_value = value;
RaisePropertyChanged(nameof(Value));
}
}
}
}using System;
using System.Linq;
namespace PropertyGridDemo.PropertyGridControl
{
public class ComboBoxEditDataContext:PropertyDataContext
{
private Tuple[] _itemSource;
private Tuple _editValue;
private int _selectedIndex;
///
/// Initializes a new instance of the class.
///
/// The item source.
/// The edit value.
public ComboBoxEditDataContext(Tuple[] itemSource,Tuple editValue)
{
_itemSource = itemSource;
_editValue = _itemSource.FirstOrDefault(x => x?.Item1.ToString() == editValue?.Item1.ToString() && x?.Item2?.ToString() == x?.Item2?.ToString());
}
///
/// Initializes a new instance of the class.
///
/// The item source.
/// The value.
public ComboBoxEditDataContext(Tuple[] itemSource, object value)
{
_itemSource = itemSource;
_editValue = _itemSource.FirstOrDefault(x => x?.Item2.ToString() == value.ToString() );
}
public string Name
{
get;set;
}
///
/// Gets or sets the item source.
///
///
/// The item source.
///
public Tuple[] ItemSource
{
get => _itemSource;
set
{
//if (_itemSource == value) return;
_itemSource = value;
RaisePropertyChanged(nameof(ItemSource));
}
}
///
/// Gets or sets the edit value.
///
///
/// The edit value.
///
public Tuple EditValue
{
get => _editValue;
set
{
if (_editValue == value) return;
_editValue = value;
RaisePropertyChanged(nameof(EditValue));
}
}
public object Value
{
set
{
EditValue = ItemSource.FirstOrDefault(x => x.Item2.Equals(value));
}
}
///
/// Gets or sets the index of the selected.
///
///
/// The index of the selected.
///
public int SelectedIndex
{
get => _selectedIndex;
set
{
if (_selectedIndex == value || value==-1) return;
_selectedIndex = value;
EditValue = ItemSource[value];
RaisePropertyChanged(nameof(SelectedIndex));
}
}
}
}using System.ComponentModel;
namespace PropertyGridDemo.PropertyGridControl
{
public class PropertyDataContext:INotifyPropertyChanged
{
///
/// 在更改属性值时发生。
///
public event PropertyChangedEventHandler PropertyChanged;
///
/// 触发属性变化
///
///
public virtual void RaisePropertyChanged(string propertyName)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
}
}
}using System;
namespace PropertyGridDemo.PropertyGridControl
{
internal static class ComboBoxEditItemSource
{
internal static Tuple[] TestItemSource = new Tuple[] {
new Tuple("1",1),
new Tuple("2",2),
new Tuple("3",3)
};
}
}5.将以上的CustomPropertyGrid丢进容器中即可，这里我直接用Mainwindow来演示：
运行示意图：
上述内容就是如何在PropertyGrid中自定义控件，你们学到知识或技能了吗？如果还想学到更多技能或者丰富自己的知识储备，欢迎关注创新互联网站建设公司行业资讯频道。
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