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我目前正在使用 VS 2012. .NET 4.5 并正在开发一个 mmc 管理单元。（我知道，对吧？！）

所以我关注了这个话题：

有没有一种简单的方法可以在 WinForms 中实现 Checked Combobox

因为我想要类似于计划任务管理器的东西。

但该解决方案似乎对我不起作用。列表视图弹出，但是当我尝试单击列表视图中的复选框时。它给了我一个大中指并关闭了我的下拉菜单。

有什么办法可以抑制组合框的“焦点丢失”关闭事件？我可以，不隐藏列表，但它永远不会隐藏。

例如：

// designer class


// 
// comboBox1
// 
this.comboBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed;
this.comboBox1.DropDownHeight = 1;
this.comboBox1.DropDownWidth = 1;
this.comboBox1.FormattingEnabled = true;
this.comboBox1.IntegralHeight = false;
this.comboBox1.Location = new System.Drawing.Point(256, 371);
this.comboBox1.Name = "comboBox1";
this.comboBox1.Size = new System.Drawing.Size(238, 21);
this.comboBox1.TabIndex = 5;
this.comboBox1.DropDown += new System.EventHandler(this.comboBox1_DropDown);
this.comboBox1.DropDownClosed += new System.EventHandler(this.comboBox1_DropDownClosed);
// 
// lstWeekDays
// 
this.lstWeekDays.CheckBoxes = true;
this.lstWeekDays.Location = new System.Drawing.Point(50, 63);
this.lstWeekDays.Name = "lstWeekDays";
this.lstWeekDays.Size = new System.Drawing.Size(263, 97);
this.lstWeekDays.TabIndex = 13;
this.lstWeekDays.Tag = "lstlstWeekDays";
this.lstWeekDays.UseCompatibleStateImageBehavior = false;
this.lstWeekDays.View = System.Windows.Forms.View.SmallIcon;
this.lstWeekDays.Visible = false;

// Code behind

public Form1()
{
    InitializeComponent();
    this.lstWeekDays.Items.Add("Monday");
    this.lstWeekDays.Items.Add("Tuesday");
    this.lstWeekDays.Items.Add("Wednesday");
    this.lstWeekDays.Items.Add("Thursday");
    this.lstWeekDays.Items.Add("Friday");
    this.lstWeekDays.Items.Add("Saturday");
    this.lstWeekDays.Items.Add("Sunday");
}

private void comboBox1_DropDown(object sender, EventArgs e)
{
    lstWeekDays.Visible = true;
}

private void comboBox1_DropDownClosed(object sender, EventArgs e)
{
    lstWeekDays.Visible = false;
}

将复选框添加到此列表而不是面板。

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