如何将 UserControl 添加到 WPF 窗口上的面板
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How to add UserControl to a Panel on a WPF Window
提问by IanGilham
I think I'm missing something that should be obvious here, but I'm drawing a blank on this one.
我想我在这里遗漏了一些应该很明显的东西，但我在这个上面画了一个空白。
I've built a very primitive UserControl containing nothing more than a TextBoxto use as a log window:
我已经构建了一个非常原始的 UserControl 只包含一个TextBox用作日志窗口：
<UserControl x:Class="My.LoggerControl"
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"
x:Name="LoggerView">
<Grid x:Name="LayoutRoot">
<TextBox x:Name="LogWindow" AcceptsReturn="True"/>
</Grid>
</UserControl>
I don't expect that to be the best way to do it, but it should be good enough for a prototype.
我不认为这是最好的方法，但对于原型来说应该足够了。
The code-behind is similarly simple:
代码隐藏同样简单：
public partial class LoggerControl : UserControl, ILogger
{
public LoggerControl()
{
InitializeComponent();
}
private LogLevel level = LogLevel.Warning;
#region ILogger
public LogLevel Level
{
get { return level; }
set { level = value; }
}
public void OnError(string s)
{
if (level >= LogLevel.Error)
LogWindow.AppendText("ERROR:::" + s + "\n");
}
// ...
#endregion
}
The thing I can't figure out is how to add this control to my MainWindow.xaml. Simplifying, lets say my window looks like this:
我无法弄清楚的是如何将此控件添加到我的MainWindow.xaml. 简化一下，假设我的窗口如下所示：
<Window x:Class="My.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:My"
Title="Test" Height="350" Width="525">
<Grid>
<local:LoggerControl x:Name="LogView" />
</Grid>
</Window>
Even with something so simple, the Designer in Visual Studio 2010 can't load the main window. The error given is:
即使有这么简单的事情，Visual Studio 2010 中的设计器也无法加载主窗口。给出的错误是：
A value of type 'LoggerControl' cannot be added to a collectionor dictionary of type 'UIElementCollection'.
无法将“LoggerControl”类型的值添加到“UIElementCollection”类型的集合或字典中。
This error message has only one unrelated hit in the major search engines (plus duplicates) so I haven't found any useful help. Microsoft's own documentation seems to imply that this should work.
此错误消息在主要搜索引擎中只有一个不相关的命中（加上重复项），所以我没有找到任何有用的帮助。微软自己的文档似乎暗示这应该有效。
Any idea how to solve this?
知道如何解决这个问题吗？
回答by cunningdave
<UserControl x:Class="My.LoggerControl"
xmlns:local="clr-namespace:My.LogTest"
Looks like you may have made a mistake in the namespacing? LoggerControl is listed as being the namespace My, while you're importing My.LogTest and assigning it to the xml-prefix local. Change this to:
看起来您可能在命名空间中犯了错误？LoggerControl 被列为命名空间 My，而您正在导入 My.LogTest 并将其分配给 xml-prefix local。将此更改为：
xmlns:local="clr-namespace:My"
And I think it should work. Otherwise, fix the LoggerControl declaration.
我认为它应该有效。否则，修复 LoggerControl 声明。
