我有一个基于Windows手机的控件,并且想从其中获取其他Windows手机UserControl
。如何访问WPF派生UserControl中的成员控件
当我把衍生代码,并试图从派生类访问其他控件,我得到一个错误:
The name 'LocationConsent_CheckBox' does not exist in the current context
<path>\project\RML\RML\CtrlLocServ.xaml.cs
基地UserControl
XAML:
<UserControl x:Class="RML.CtrlBase"
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"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<Grid x:Name="LayoutRoot">
</Grid>
</UserControl>
基地UserControl
后面的代码:
namespace RML
{
public partial class CtrlBase : UserControl
{
public CtrlBase()
{
InitializeComponent();
LayoutRoot.Background = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Colors.Transparent);
}
}
}
派生UserControl
xaml: (注意我已经改变了电网的名称LayoutRoot2而不是LayoutRoot)
<src:CtrlBase x:Class="CtrlLocServ"
xmlns:src="clr-namespace:RML"
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"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<Grid x:Name="LayoutRoot2">
<StackPanel>
<CheckBox x:Name="LocationConsent_CheckBox" />
</StackPanel>
</Grid>
</src:CtrlBase>
衍生UserControl
,后面的代码:
namespace RML
{
public partial class CtrlLocServ : CtrlBase
{
public CtrlLocServ()
{
InitializeComponent();
LocationConsent_CheckBox.IsChecked = false;
}
}
}
这仍然给我上面的错误虽然。
下面是生成的文件:
#pragma checksum "..\..\CtrlLocationService.xaml" "{406ea660-64cf-4c82-b6f0-42d48172a799}" "D56B477B354FB03C45E5F49343F67196"
//------------------------------------------------------------------------------
// <auto-generated>
// This code was generated by a tool.
// Runtime Version:4.0.30319.18063
//
// Changes to this file may cause incorrect behavior and will be lost if
// the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
using System;
using System.Diagnostics;
using System.Windows;
using System.Windows.Automation;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Markup;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Media.Effects;
using System.Windows.Media.Imaging;
using System.Windows.Media.Media3D;
using System.Windows.Media.TextFormatting;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Shell;
namespace RML {
/// <summary>
/// CtrlLocationService
/// </summary>
public partial class CtrlLocationService : System.Windows.Controls.UserControl, System.Windows.Markup.IComponentConnector {
private bool _contentLoaded;
/// <summary>
/// InitializeComponent
/// </summary>
[System.Diagnostics.DebuggerNonUserCodeAttribute()]
[System.CodeDom.Compiler.GeneratedCodeAttribute("PresentationBuildTasks", "4.0.0.0")]
public void InitializeComponent() {
if (_contentLoaded) {
return;
}
_contentLoaded = true;
System.Uri resourceLocater = new System.Uri("/RML;component/ctrllocationservice.xaml", System.UriKind.Relative);
#line 1 "..\..\CtrlLocationService.xaml"
System.Windows.Application.LoadComponent(this, resourceLocater);
#line default
#line hidden
}
[System.Diagnostics.DebuggerNonUserCodeAttribute()]
[System.CodeDom.Compiler.GeneratedCodeAttribute("PresentationBuildTasks", "4.0.0.0")]
[System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
[System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes")]
[System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Maintainability", "CA1502:AvoidExcessiveComplexity")]
[System.Diagnostics.CodeAnalysis.SuppressMessageAttribute("Microsoft.Performance", "CA1800:DoNotCastUnnecessarily")]
void System.Windows.Markup.IComponentConnector.Connect(int connectionId, object target) {
this._contentLoaded = true;
}
}
}
建议将不胜感激。
我没有看到你的'LocationConsent_Checkbox'声明在哪里。 – Sheridan 2014-09-03 13:56:09
在派生用户控件Xaml ... – user3174075 2014-09-03 13:57:35
好吧,我认为我看到你的问题。如果要扩展控件,则不能使用XAML文件。这意味着您无法以这种方式定义XAML的各个部分。相反,只需在'DataTemplate'中定义XAML并将其应用于'ContentControl'来显示它们。 – Sheridan 2014-09-03 14:00:58