Popup中ListBox的SelectChange事件关闭弹出窗体后主窗体点击无效BUG
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2022-04-14 16:02:17
WPF的BUG!弹出框的 自定义控件里有Popup, Popup里面放一个ListBox 在ListBox中的SelectionChange事件触发关闭弹出框后，主窗体存在一定概率卡死（但点击标题又能用的BUG） 步骤一： 新建个自定义WPF控件UserControl Xaml代码：
wpf的bug!
弹出框的 自定义控件里有popup, popup里面放一个listbox
在listbox中的selectionchange事件触发关闭弹出框后，主窗体存在一定概率卡死（但点击标题又能用的bug）
步骤一： 新建个自定义wpf控件usercontrol
xaml代码：
<usercontrol x:class="wpfapplication1.usercontrol1"
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"
xmlns:local="clr-namespace:wpfapplication1"
mc:ignorable="d"
d:designheight="30" d:designwidth="200">
<grid>
<grid x:name="part_container">
<dockpanel margin="0,0,1,0">
<togglebutton x:name="part_toggbtn" dockpanel.dock="right" borderthickness="1" borderbrush="#959595" margin="-1,0,0,0"
ischecked="{binding path=isdropdownopen,mode=twoway, relativesource={relativesource mode=findancestor, ancestortype=local:usercontrol1}}">
>
</togglebutton>
<textbox x:name="txtautocomplete" />
</dockpanel>
</grid>
<popup x:name="part_popup" opacity="0" width="{binding elementname=part_container,path=actualwidth}"
isopen="{binding path=isdropdownopen,mode=oneway, relativesource={relativesource mode=findancestor, ancestortype=local:usercontrol1}}"
popupanimation="slide" placement="bottom" staysopen="false" allowstransparency="true"
placementtarget="{binding elementname=txtautocomplete}" verticaloffset="0" minheight="50" maxheight="300">
<listbox x:name="listboxsuggestion" borderbrush="transparent" borderthickness="0">
<listbox.itemtemplate>
<datatemplate>
<textblock text="{binding item1}"/>
</datatemplate>
</listbox.itemtemplate>
</listbox>
</popup>
</grid>
</usercontrol>
逻辑代码：
public partial class usercontrol1 : usercontrol
{
public usercontrol1()
{
initializecomponent();
list<tuple<string, string, string>> tupes = new list<tuple<string, string, string>>();
enumerable.range(1, 10).select(p => p.tostring().padleft(3, '0')).tolist().foreach(p => tupes.add(new tuple<string, string, string>(p, p, p)));
listboxsuggestion.itemssource = tupes;
listboxsuggestion.selectionchanged += (o1, e1) =>
{
routedeventargs args = new routedeventargs(enterdownevent, o1); //选中项改变触发
this.raiseevent(args);
};
}
#region 回车触发事件
//声明和注册路由事件
public static readonly routedevent enterdownevent =
eventmanager.registerroutedevent(
"enterdown",
routingstrategy.bubble,
typeof(eventhandler<routedeventargs>),
typeof(usercontrol1));
//clr事件包装
public event routedeventhandler enterdown
{
add { this.addhandler(enterdownevent, value); }
remove { this.removehandler(enterdownevent, value); }
}
#endregion
#region 是否打开下拉框
public bool isdropdownopen
{
get { return (bool)getvalue(isdropdownopenproperty); }
set
{
setvalue(isdropdownopenproperty, value);
}
}
public static readonly dependencyproperty isdropdownopenproperty =
dependencyproperty.register("isdropdownopen", typeof(bool), typeof(usercontrol1), new propertymetadata(false));
#endregion
}
步骤二： 新建个window窗体dialogwin
xaml代码
<window x:class="wpfapplication1.dialogwin"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:wpfapplication1"
mc:ignorable="d"
title="dialogwin" height="88.846" width="210">
<grid>
<local:usercontrol1 width="120" height="22" x:name="myselect" />
</grid>
</window>
cs代码
public partial class dialogwin : window
{
public dialogwin()
{
initializecomponent();
myselect.enterdown += (o1, e1) =>
{
this.close();
};
}
}
步骤三，在主窗体弹出dialogwin
xaml代码
<window x:class="wpfapplication1.mainwindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:wpfapplication1"
mc:ignorable="d"
title="mainwindow" height="350" width="525">
<grid>
<textbox x:name="textbox" horizontalalignment="left" height="23" margin="44,32,0,0" textwrapping="wrap" text="textbox" verticalalignment="top" width="120"/>
<textbox horizontalalignment="left" height="23" margin="198,32,0,0" textwrapping="wrap" text="textbox" verticalalignment="top" width="120"/>
<textbox horizontalalignment="left" height="23" margin="350,32,0,0" textwrapping="wrap" text="textbox" verticalalignment="top" width="120"/>
<button x:name="button" content="button" horizontalalignment="left" verticalalignment="top" width="75" margin="44,82,0,0"/>
<button x:name="button1" content="弹出对话框" horizontalalignment="left" verticalalignment="top" width="75" margin="156,82,0,0" click="button1_click"/>
</grid>
</window>
cs代码
/// <summary>
/// mainwindow.xaml 的交互逻辑
/// </summary>
public partial class mainwindow : window
{
public mainwindow()
{
initializecomponent();
}
private void button1_click(object sender, routedeventargs e)
{
var s = new dialogwin();
s.owner = this;
s.windowstartuplocation = windowstartuplocation.centerowner;
s.showdialog();
}
}
运行程序....
解决方案： 开启线程延迟关闭弹出体【最无语做法】