WPF UserControl은 어떻게 WPF UserControl을 상속 할 수 있습니까?

WPF UserControl은 어떻게 WPF UserControl을 상속 할 수 있습니까?

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작동하는 DataTypeWholeNumber 라는 다음 WPF UserControl 입니다.

이제 DataTypeDateTime 및 DataTypeEmail 등 의 UserControl을 만들고 싶습니다 .

많은 종속성 속성이 이러한 모든 컨트롤에서 공유되므로 공통 메서드를 BaseDataType에 넣고 이러한 각 UserControls가이 기본 형식에서 상속 되도록하려고합니다 .

그러나 그렇게하면 오류가 발생합니다 .Partial Declaration은 다른 기본 클래스를 가질 수 없습니다 .

그렇다면 공유 기능이 모두 기본 클래스에 있도록 UserControls로 상속을 구현하려면 어떻게해야합니까?

using System.Windows;
using System.Windows.Controls;

namespace TestDependencyProperty827.DataTypes
{
    public partial class DataTypeWholeNumber : BaseDataType
    {
        public DataTypeWholeNumber()
        {
            InitializeComponent();
            DataContext = this;

            //defaults
            TheWidth = 200;
        }

        public string TheLabel
        {
            get
            {
                return (string)GetValue(TheLabelProperty);
            }
            set
            {
                SetValue(TheLabelProperty, value);
            }
        }

        public static readonly DependencyProperty TheLabelProperty =
            DependencyProperty.Register("TheLabel", typeof(string), typeof(BaseDataType),
            new FrameworkPropertyMetadata());


        public string TheContent
        {
            get
            {
                return (string)GetValue(TheContentProperty);
            }
            set
            {
                SetValue(TheContentProperty, value);
            }
        }

        public static readonly DependencyProperty TheContentProperty =
            DependencyProperty.Register("TheContent", typeof(string), typeof(BaseDataType),
            new FrameworkPropertyMetadata());


        public int TheWidth
        {
            get
            {
                return (int)GetValue(TheWidthProperty);
            }
            set
            {
                SetValue(TheWidthProperty, value);
            }
        }

        public static readonly DependencyProperty TheWidthProperty =
            DependencyProperty.Register("TheWidth", typeof(int), typeof(DataTypeWholeNumber),
            new FrameworkPropertyMetadata());



    }
}

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xaml의 첫 번째 태그를 변경하여 새 기본 유형에서도 상속했는지 확인하십시오.

그래서

<UserControl x:Class="TestDependencyProperty827.DataTypes.DataTypeWholeNumber"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        
    xmlns:s="clr-namespace:System;assembly=mscorlib"
    >

becomes

<myTypes:BaseDataType x:Class="TestDependencyProperty827.DataTypes.DataTypeWholeNumber"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        
    xmlns:s="clr-namespace:System;assembly=mscorlib"
    xmlns:myTypes="clr-namespace:TestDependencyProperty827.DataTypes"
    >

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So, to summarise the complete answer including the extra details from the comments below:

• The base class should not include a xaml file. Define it in a single (non-partial) cs file and define it to inherit directly from Usercontrol.
• Ensure that the subclass inherits from the base class both in the cs code-behind file and in the first tag of the xaml (as shown above).

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public partial class MooringConfigurator : MooringLineConfigurator
    {
        public MooringConfigurator()
        {
            InitializeComponent();
        }
    }



<dst:MooringLineConfigurator x:Class="Wave.Dashboards.Instruments.ConfiguratorViews.DST.MooringConfigurator"
    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:dst="clr-namespace:Wave.Dashboards.Instruments.ConfiguratorViews.DST"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">

    <Grid x:Name="LayoutRoot" Background="White">

    </Grid>
</dst:MooringLineConfigurator>    

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I found the answer in this article: http://www.paulstovell.com/xmlnsdefinition

Basically what is says is that you should define an XML namespace in the AssemlyInfo.cs file, which can the be used in the XAML. It worked for me, however I placed the base user control class in a separate DLL...

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I ran into the same issue but needed to have the control inherit from an abstract class, which is not supported by the designer. What solved my problem is making the usercontrol inherit from both a standard class (that inherits UserControl) and an interface. This way the designer is working.

//the xaml
<local:EcranFiche x:Class="VLEva.SIFEval.Ecrans.UC_BatimentAgricole" 
                  xmlns:local="clr-namespace:VLEva.SIFEval.Ecrans"
                  ...>
    ...
</local:EcranFiche>

// the usercontrol code behind
public partial class UC_BatimentAgricole : EcranFiche, IEcranFiche
{
    ...
}

// the interface
public interface IEcranFiche
{
   ...
}

// base class containing common implemented methods
public class EcranFiche : UserControl
{
    ... (ex: common interface implementation)
}

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There is partial class definition created by designer, you can open it easy way via InitializeComponent() method definition. Then just change partial class iheritence from UserControl to BaseDataType (or any you specified in class definition).

After that you will have warning that InitializeComponent() method is hidden in child class.

Therefore you can make a CustomControl as base clas instead of UserControl to avoid partial definition in base class (as described in one comment).

참고URL : https://stackoverflow.com/questions/887519/how-can-a-wpf-usercontrol-inherit-a-wpf-usercontrol