C# 如果设置了窗体的AcceptButton,如何自定义按钮?
我用一些附加选项实现了自定义按钮控件。并将我的自定义按钮添加到表单中。当我设置Form.Acception是添加的自定义按钮时,我想在按钮中进行一些自定义。我想自定义自定义按钮类实现中的按钮外观,当它标记为窗体的AcceptButton时C# 如果设置了窗体的AcceptButton,如何自定义按钮?,c#,forms,winforms,acceptbutton,C#,Forms,Winforms,Acceptbutton,我用一些附加选项实现了自定义按钮控件。并将我的自定义按钮添加到表单中。当我设置Form.Acception是添加的自定义按钮时,我想在按钮中进行一些自定义。我想自定义自定义按钮类实现中的按钮外观,当它标记为窗体的AcceptButton时 有人建议我如何知道按钮在button类中被标记为表单的AcceptButton吗?错误: public class MyButton : Button { public override void NotifyDefault(bool
有人建议我如何知道按钮在button类中被标记为表单的AcceptButton吗?错误:
public class MyButton : Button
{
public override void NotifyDefault(bool value)
{
if (this.IsDefault != value)
{
this.IsDefault = value;
}
if (IsDefault)
{
this.BackColor = Color.Red;
}
else
{
this.BackColor = Color.Green;
}
}
}
public partial class MyButton : Button
{
public MyButton()
{
InitializeComponent();
}
protected override void OnCreateControl()
{
base.OnCreateControl();
if (this == FindForm()?.AcceptButton)
this.BackColor = Color.RosyBrown;
}
}
受保护的覆盖无效加载(事件参数e)
{
基础荷载(e);
if(((形式)this.TopLevelControl).AcceptButton==this)
....
}
UPD:
public class MyButton : Button
{
public override void NotifyDefault(bool value)
{
if (this.IsDefault != value)
{
this.IsDefault = value;
}
if (IsDefault)
{
this.BackColor = Color.Red;
}
else
{
this.BackColor = Color.Green;
}
}
}
public partial class MyButton : Button
{
public MyButton()
{
InitializeComponent();
}
protected override void OnCreateControl()
{
base.OnCreateControl();
if (this == FindForm()?.AcceptButton)
this.BackColor = Color.RosyBrown;
}
}
您可以遍历父类,通过其基类
控件的父属性来查找表单:
public partial class MyButton : Button
{
public MyButton()
{
InitializeComponent();
}
private Form CheckParentForm(Control current)
{
// if the current is a form, return it.
if (current is Form)
return (Form)current;
// if the parent of the current not is null,
if (current.Parent != null)
// check his parent.
return CheckParentForm(current.Parent);
// there is no parent found and we didn't find a Form.
return null;
}
protected override void OnCreateControl()
{
base.OnCreateControl();
// find the parent form.
var form = CheckParentForm(this);
// if a form was found,
if (form != null)
// check if this is set as accept button
if (this == form.AcceptButton)
// for example, change the background color (i used for testing)
this.BackColor = Color.RosyBrown;
}
}
由于递归,当按钮放置在面板上时,它也可以工作
注意:在调用OnCreateControl之前必须设置accept按钮(例如在表单的构造函数中)
经过一段时间后,我找到了一个标准实现:
您还可以使用:this.FindForm()代码>
C#6.0中的事件较短:
public class MyButton : Button
{
public override void NotifyDefault(bool value)
{
if (this.IsDefault != value)
{
this.IsDefault = value;
}
if (IsDefault)
{
this.BackColor = Color.Red;
}
else
{
this.BackColor = Color.Green;
}
}
}
public partial class MyButton : Button
{
public MyButton()
{
InitializeComponent();
}
protected override void OnCreateControl()
{
base.OnCreateControl();
if (this == FindForm()?.AcceptButton)
this.BackColor = Color.RosyBrown;
}
}
\o/@Erm已更新。这是从按钮到窗体的任何引用吗?这个.TopLevelControl?这就是关于没有表单的按钮的问题?)您可以动态创建一个按钮,然后将其添加到表单中。它的父级可以为空。永远不会是一个接受按钮。@garik解释-1?请看我更新的答案,希望它能帮助您。祝你好运