WPF 自定义用户控件 - “成员 X 无法识别或无法访问”
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WPF Custom User Control - "The member X is not recognized or accessible"
提问by SYB
I have this custom control but cannot access its members from my Main XAML
我有这个自定义控件，但无法从我的主 XAML 访问它的成员
<UserControl x:Class="FireflyMmwDiagnostics.Controls.RegisterTextBox"
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>
<Label Name="LabelRegisterTitle"/>
</Grid>
public partial class RegisterTextBox : UserControl
{
public RegisterTextBox()
{
InitializeComponent();
}
public string RegisterTitle
{
get { return this.LabelRegisterTitle.Content.ToString(); }
set { this.LabelRegisterTitle.Content = value; }
}
And this is what I have in Main XAML where I get the error stating "The member RegisterTitle is not recognized or accessible":
这就是我在 Main XAML 中遇到的错误，指出“成员 RegisterTitle 无法识别或无法访问”：
<Controls:RegisterTextBox RegisterTitle="This Is A Test"/>
I watched a couple of YouTube videos and this is exactly how they did it and it worked for them for some reason. Please advice on what could be the issue here. Thank you!
我看了几个 YouTube 视频，这正是他们所做的，并且出于某种原因对他们有用。请就此处可能出现的问题提供建议。谢谢！
回答by Stuart
Try changing your property to be declared as Dependency Properties
尝试将您的财产更改为声明为 Dependency Properties
This should help as it has example code - Why am I seeing a “member is not recognized or is not accessible” error on my WPF User Control?
这应该会有所帮助，因为它有示例代码 -为什么我在 WPF 用户控件上看到“成员无法识别或无法访问”错误？
Update
更新
Your code works OK for me without using Dependency Properties, so a couple of things to try:
您的代码在不使用依赖属性的情况下对我来说可以正常工作，因此可以尝试以下几点：
- In your control, make sure you end it with
</UserControl> - Change
Controls:RegisterTextBoxto use a lower case 'c', socontrols:RegisterTextBox
- 在您的控制下，确保以
</UserControl> - 更改
Controls:RegisterTextBox为使用小写的“c”，因此controls:RegisterTextBox
回答by Jamie P
You might need to rebuild in order for it to see RegisterTitle.
您可能需要重建才能看到RegisterTitle.
If that doesn't work, make sure you have defined in XAML where Controlsis in your project, otherwise it definitely won't be able to see it!
如果这不起作用，请确保您在 XAML 中定义了Controls项目中的位置，否则它肯定无法看到它！
For example:
例如：
<Window xmlns:Controls="clr-namespace:FireflyMmwDiagnostics.Controls.RegisterTextBox">
