C# 以编程方式单击复选框
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Programmatically click on a CheckBox
提问by Grzenio
Is there a way to programmatically generate a click event on a CheckBox? I am looking for an equivalent to Button.PerformClick();
有没有办法以编程方式在 CheckBox 上生成点击事件？我正在寻找等效于 Button.PerformClick();
采纳答案by Jeff Cyr
Why do you need to simulate a click, doesn't this line of code fits your need?
为什么需要模拟点击，这行代码不符合你的需要吗？
myCheckBox.Checked = !myCheckBox.Checked;
If you need to execute logic when the state of the CheckBox changes, you should use CheckedChangedevent instead of Click.
如果你需要在 CheckBox 的状态改变时执行逻辑，你应该使用CheckedChangedevent 而不是Click.
private void CheckBox1_CheckedChanged(Object sender, EventArgs e)
{
MessageBox.Show("You are in the CheckBox.CheckedChanged event.");
}
回答by scwagner
I'm still setting up a new workstation so I can't research this properly at the moment, but with UI Automationmaybe it's possible that the checkbox supports the IInvokeProviderand you can use the Invokemethod?
我仍在设置一个新工作站，所以我目前无法正确研究它，但是使用UI 自动化，也许复选框支持IInvokeProvider并且您可以使用Invoke方法？
回答by Mark Byers
I don't think you can generate a click event in that way without calling the checkBox_Click event handler directly. But you can do this:
我不认为您可以在不直接调用 checkBox_Click 事件处理程序的情况下以这种方式生成点击事件。但是你可以这样做：
checkBox.Checked = !checkBox.Checked;
The CheckedChanged handler will still be called even if you do this.
即使您这样做，CheckedChanged 处理程序仍将被调用。
回答by Fredrik M?rk
Why do you want to generate a click event on the CheckBox?
为什么要在 CheckBox 上生成点击事件？
If you want to toggle it's value:
如果你想切换它的值：
theCheckBox.Checked = !theCheckBox.Checked;
If you want to trigger some functionality that is connected to the Click event, it's a better idea to move the code out from the Clickevent handler into a separate method that can be called from anywhere:
如果要触发某些与 Click 事件相关的功能，最好将代码从Click事件处理程序移出到一个可以从任何地方调用的单独方法中：
private void theCheckBox_Click(object sender, EventArgs e)
{
HandleCheckBoxClick((CheckBox)sender);
}
private void HandleCheckBoxClick(CheckBox sender)
{
// do what is needed here
}
When you design your code like that, you can easily invoke the functionality from anywhere:
当您像这样设计代码时，您可以轻松地从任何地方调用该功能：
HandleCheckBoxClick(theCheckBox);
The same approach can (and perhaps should) be used for most control event handlers; move as much code as possible out from event handlers and into methods that are more reusable.
相同的方法可以（也许应该）用于大多数控制事件处理程序；将尽可能多的代码从事件处理程序移出到更可重用的方法中。
回答by cacoroto
Those solutions above calls Checkbox.CheckedChanged event.
上面的那些解决方案调用 Checkbox.CheckedChanged 事件。
If you want to explicitly call Click event you can this:
如果你想显式调用 Click 事件，你可以这样：
checkBox1_Click(checkBox1, null);
回答by Fandango68
You're not specifying what sort of CheckBox control. ASP.net or Windows?
您没有指定哪种 CheckBox 控件。ASP.net 还是 Windows？
Assuming a web checkbox control, this is the way to fire it off using JavaScript call from within code-behind...
假设有一个 web 复选框控件，这是在代码隐藏中使用 JavaScript 调用来触发它的方法......
Calling a JavaScript function from code behind
从后面的代码调用 JavaScript 函数
Step 1 Add your Javascript code
第 1 步添加您的 Javascript 代码
<script type="text/javascript" language="javascript">
function Func() {
alert("hello!")
}
</script>
Step 2 Add 1 Script Manager in your webForm and Add 1 button too
步骤 2 在您的 webForm 中添加 1 个脚本管理器并添加 1 个按钮
Step 3 Add this code in your button click event
第 3 步将此代码添加到您的按钮单击事件中
ScriptManager.RegisterStartupScript(this.Page, Page.GetType(), "text", "Func()", true);
