C# 用户控件自定义事件崩溃
我使用ClickEvent制作了一个简单的自定义控件: ImageButton.xaml:C# 用户控件自定义事件崩溃,c#,wpf,xaml,user-controls,C#,Wpf,Xaml,User Controls,我使用ClickEvent制作了一个简单的自定义控件: ImageButton.xaml: <UserControl x:Name="ImgButton" x:Class="WpfApplication1.ImageButton" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/200
<UserControl x:Name="ImgButton" x:Class="WpfApplication1.ImageButton"
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></Grid>
</UserControl>
如果我在处理click事件,当我单击控件时,它会正常工作,否则我会崩溃。那个么,我该怎么办呢?在引发事件之前,必须检查是否已将处理程序添加到事件中:
void ImageButton_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if ((mouse_down) && (mouse_in) && Click != null)
{
Click(this, null);
}
mouse_down = false;
}
void ImageButton_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if ((mouse_down) && (mouse_in) && Click != null)
{
Click(this, null);
}
mouse_down = false;
}