在WPF 4.5中以编程方式向Grid RowDefition添加控件 [英] Programmatically add control to Grid RowDefition in WPF 4.5

问题描述

我一直在浏览该网站（以及许多其他网站），以弄清楚发生了什么以及为什么它不起作用。我正在运行VS2012，并创建了WPF C＃应用程序（目标.NET 4.5）。我是WPF的新手，已经花了很多年编写Windows Forms应用程序的代码，但是决定尝试一下，并且到目前为止还很喜欢XAML。

I've been through this site (and many others) trying to figure out what is going on and why this does not work. I am running VS2012 and have created a WPF C# app (target .NET 4.5). I am new to WPF, having spent many years coding Windows Forms apps, but decided to take the plunge, and am liking XAML so far.

我最终想： b $ b 1）删除网格中特定行（RowDefinition）中的用户控件
2）在该特定行中放置另一个用户控件

Ultimately I want to: 1) Remove a user control in a particular Row (RowDefinition) in my Grid 2) Place another user control in that particular Row

但是我甚至无法放置一个简单的按钮控件。我想做的是在第4行（索引为零的3）中放置一个按钮。这是我的XAML：

However I can't seem to place even a simple button control. What I want to do is place a button in Row 4 (3 with zero index). Here is my XAML:

<Window
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:Custom="http://schemas.microsoft.com/winfx/2006/xaml/presentation/ribbon"
x:Class="TestApp2_WindowsClient.MainWindow"
Title="Test App 2" Height="700" Width="1000" MinHeight="700" MinWidth="1000" MaxHeight="700" MaxWidth="1000" FontSize="12" FontFamily="Segoe UI Semibold">
<Grid VerticalAlignment="Top" Name="gridMain">
    <Grid.RowDefinitions>
        <RowDefinition Height="60"/>
        <RowDefinition Height="152"/>
        <RowDefinition Height="240"/>
        <RowDefinition Height="60"/>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="0"/>
    </Grid.ColumnDefinitions>

<StackPanel Name="stackButtons1" HorizontalAlignment="Left" Height="50" Margin="4,4,-310,4" Grid.Row="0" VerticalAlignment="Top" Width="300" Orientation="Horizontal" >
        <Button Content="Show Bookings" Height="24" Margin="4,0,0,0" Click="Button_Click_1" />
        <Button Content="Show Radio Buttons" Height="24" Margin="4,0,0,0" Click="Button_Click_2" />
    </StackPanel>

</Grid>
</Window>

按钮代码（堆栈面板中的第一个按钮）为：

The button code (first button in Stack Panel) is:

Button MyControl = new Button();
MyControl.Content = "Test Button!";

Grid.SetRow(MyControl, 3); 
Grid.SetColumn(MyControl, 0); 
gridMain.Children.Add(MyControl); 

我可以看到（在我的手表中）每次单击gridMain.Children计数值都会增加第一个按钮，但屏幕上什么都没显示。

I can see (in my watch) that the gridMain.Children count value increases every time I click the first button, but nothing appears on the screen.

这可能确实很愚蠢，但是花了几个小时搜索并尝试一堆不同的代码却无济于事。

It's probably something really silly, but a few hours of searching and trying a stack of different code has not helped.

预先感谢！

推荐答案

<ColumnDefinition Width="0"/>

如果您增加宽度，也许可以看到该按钮。

Maybe you could see the button if you increased the width.

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