wpf 如何以编程方式创建用于控制的事件触发器
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时间：2020-09-13 12:10:28 来源:igfitidea点击:
How to create an event trigger for control programmatically
提问by Mr. Blond
I want to create an event trigger for my ContentControl programmatically. I want to achieve the same result as i would use this xaml code. Including - Command, CommandParameter, EventName
How it looks in my xaml code:
我想以编程方式为我的 ContentControl 创建一个事件触发器。我想获得与使用此 xaml 代码相同的结果。包括 - 命令、命令参数、事件名称
在我的 xaml 代码中的外观：
<ContentControl>
<i:Interaction.Triggers>
<i:EventTrigger EventName="PreviewMouseLeftButtonDown">
<i:InvokeCommandAction Command="{Binding ButtonClickCommand}" CommandParameter="btnAdd"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</ContentControl>
回答by McGarnagle
Here's the equivalent in code:
这是代码中的等价物：
void SetTrigger(ContentControl contentControl)
{
// create the command action and bind the command to it
var invokeCommandAction = new InvokeCommandAction { CommandParameter = "btnAdd" };
var binding = new Binding { Path = new PropertyPath("ButtonClickCommand") };
BindingOperations.SetBinding(invokeCommandAction, InvokeCommandAction.CommandProperty, binding);
// create the event trigger and add the command action to it
var eventTrigger = new System.Windows.Interactivity.EventTrigger { EventName = "PreviewMouseLeftButtonDown" };
eventTrigger.Actions.Add(invokeCommandAction);
// attach the trigger to the control
var triggers = Interaction.GetTriggers(contentControl);
triggers.Add(eventTrigger);
}
