[英]Attach property to usercontrol and updating it at design time
How can I create a user control like the Textbox? 如何创建像Textbox这样的用户控件? For example when I change the Text property of a Textbox control the new text appears on the window that I am currently working with. 例如,当我更改Textbox控件的Text属性时,新文本将出现在我当前使用的窗口中。
In my project I have a lot of places where the user has to enter information therefore I want to create a InputField user control. 在我的项目中,我有很多用户必须输入信息的地方,因此我想创建一个InputField用户控件。 (that usercontrol consists of a label an a textbox with custom style) (该usercontrol由标签和具有自定义样式的文本框组成)
Here is the xaml for my user control: 这是我的用户控件的xaml:
<UserControl x:Class="PDV.UserControls.InputField"
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" >
<Grid>
<StackPanel>
<Label Content="{Binding Path=LblContent}" HorizontalAlignment="Left" VerticalAlignment="Top" />
<TextBox Height="23" Margin="5,-5,2,2" Name="textBox1" VerticalAlignment="Top" />
</StackPanel>
</Grid>
</UserControl>
and the code behind for that user control: 以及该用户控件的代码:
namespace PDV.UserControls
{
public partial class InputField : UserControl
{
public static DependencyProperty MessageProperty = DependencyProperty.Register(
"LblContent", typeof(string), typeof(UserControl));
public string LblContent{
get{
return (string)GetValue(MessageProperty);
}
set{
SetValue(MessageProperty, value);
}
}
//Constructor
public InputField(){
InitializeComponent();
this.DataContext = this;
}
}
}
so on my main window I will be able to use that user control by: 所以在我的主窗口上,我将能够通过以下方式使用该用户控件:
1) importing the namespace where that user control is: 1)导入该用户控件所在的命名空间:
xmlns:myCtrl ="clr-namespace:PDV.UserControls"
2) placing that control in that window: 2)将该控件放在该窗口中:
<myCtrl:InputField LblContent="hello" Margin="0,0,483,0" Height="49" VerticalAlignment="Top"></myCtrl:InputField>
What do I have to do so that when I update LblContent="hello"
it renders on the window? 当我更新LblContent="hello"
时,我需要做什么才能在窗口上渲染? It will be nice for it to render at design time not just at runtime 它不仅仅是在运行时在设计时渲染它会很好
I think that the second type of might be InputField public static DependencyProperty MessageProperty = DependencyProperty.Register( "LblContent", typeof(string), typeof(InputField)); 我认为第二种类型可能是InputField public static DependencyProperty MessageProperty = DependencyProperty.Register(“LblContent”,typeof(string),typeof(InputField));
I never try to set the DataContext in your way, eventually try to give a name at the usercontrol x:Name="Root" then change the binding like this: Content="{Binding Path=LblContent, ElementName=Root}" 我从不尝试以你的方式设置DataContext,最终尝试在usercontrol x上给出一个名称:Name =“Root”然后更改绑定,如下所示:Content =“{Binding Path = LblContent,ElementName = Root}”
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