C# 有没有一种简单的方法可以在 WinForms 中实现选中的组合框

Is there a simple way to implement a Checked Combobox in WinForms

提问by Matt Wilko

Does anyone know of a simple implementation of a checked combobox in WinForms? I haven't been able to find anything when googling.

有谁知道 WinForms 中选中的组合框的简单实现？谷歌搜索时我找不到任何东西。

I want something that behaves like this windows scheduled task trigger edit:

我想要一些行为类似于此 Windows 计划任务触发器编辑的内容：

采纳答案by user1120193

Here is what you want, I just coded this by myself
The concept is really simple, use a panel and add checkboxes onto it. Then force the combo box to disable it's drop down menu but still you can click on its down arrow. Use DropDownand DropDownClosedevents of the combo box. When you make the combo box's list down set panel's Visibleproperty to True, hide it when you close the drop down of the combo box.

这是你想要的，我只是自己编码这个
概念非常简单，使用面板并在其上添加复选框。然后强制组合框禁用它的下拉菜单，但您仍然可以单击其向下箭头。组合框的使用DropDown和DropDownClosed事件。当您将组合框的列表向下设置面板的Visible属性时True，当您关闭组合框的下拉列表时将其隐藏。

//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);
// 
// panel1
// 
this.panel1.BackColor = System.Drawing.Color.White;
this.panel1.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.panel1.Controls.Add(this.checkBox9);
this.panel1.Controls.Add(this.checkBox8);
this.panel1.Controls.Add(this.checkBox7);
this.panel1.Controls.Add(this.checkBox6);
this.panel1.Controls.Add(this.checkBox5);
this.panel1.Controls.Add(this.checkBox4);
this.panel1.Controls.Add(this.checkBox3);
this.panel1.Controls.Add(this.checkBox2);
this.panel1.Controls.Add(this.checkBox1);
this.panel1.Location = new System.Drawing.Point(252, 394);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(245, 68);
this.panel1.TabIndex = 6;
// 
// checkBox9
// 
this.checkBox9.AutoSize = true;
this.checkBox9.Location = new System.Drawing.Point(162, 48);
this.checkBox9.Name = "checkBox9";
this.checkBox9.Size = new System.Drawing.Size(80, 17);
this.checkBox9.TabIndex = 9;
this.checkBox9.Text = "checkBox9";
this.checkBox9.UseVisualStyleBackColor = true;
// 
// checkBox8
// 
this.checkBox8.AutoSize = true;
this.checkBox8.Location = new System.Drawing.Point(162, 27);
this.checkBox8.Name = "checkBox8";
this.checkBox8.Size = new System.Drawing.Size(80, 17);
this.checkBox8.TabIndex = 8;
this.checkBox8.Text = "checkBox8";
this.checkBox8.UseVisualStyleBackColor = true;
// 
// checkBox7
// 
this.checkBox7.AutoSize = true;
this.checkBox7.Location = new System.Drawing.Point(162, 4);
this.checkBox7.Name = "checkBox7";
this.checkBox7.Size = new System.Drawing.Size(80, 17);
this.checkBox7.TabIndex = 7;
this.checkBox7.Text = "checkBox7";
this.checkBox7.UseVisualStyleBackColor = true;
// 
// checkBox6
// 
this.checkBox6.AutoSize = true;
this.checkBox6.Location = new System.Drawing.Point(82, 47);
this.checkBox6.Name = "checkBox6";
this.checkBox6.Size = new System.Drawing.Size(80, 17);
this.checkBox6.TabIndex = 5;
this.checkBox6.Text = "checkBox6";
this.checkBox6.UseVisualStyleBackColor = true;
// 
// checkBox5
// 
this.checkBox5.AutoSize = true;
this.checkBox5.Location = new System.Drawing.Point(82, 26);
this.checkBox5.Name = "checkBox5";
this.checkBox5.Size = new System.Drawing.Size(80, 17);
this.checkBox5.TabIndex = 4;
this.checkBox5.Text = "checkBox5";
this.checkBox5.UseVisualStyleBackColor = true;
// 
// checkBox4
// 
this.checkBox4.AutoSize = true;
this.checkBox4.Location = new System.Drawing.Point(82, 4);
this.checkBox4.Name = "checkBox4";
this.checkBox4.Size = new System.Drawing.Size(80, 17);
this.checkBox4.TabIndex = 3;
this.checkBox4.Text = "checkBox4";
this.checkBox4.UseVisualStyleBackColor = true;
// 
// checkBox3
// 
this.checkBox3.AutoSize = true;
this.checkBox3.Location = new System.Drawing.Point(3, 47);
this.checkBox3.Name = "checkBox3";
this.checkBox3.Size = new System.Drawing.Size(80, 17);
this.checkBox3.TabIndex = 2;
this.checkBox3.Text = "checkBox3";
this.checkBox3.UseVisualStyleBackColor = true;
// 
// checkBox2
// 
this.checkBox2.AutoSize = true;
this.checkBox2.Location = new System.Drawing.Point(4, 24);
this.checkBox2.Name = "checkBox2";
this.checkBox2.Size = new System.Drawing.Size(80, 17);
this.checkBox2.TabIndex = 1;
this.checkBox2.Text = "checkBox2";
this.checkBox2.UseVisualStyleBackColor = true;
// 
// checkBox1
// 
this.checkBox1.AutoSize = true;
this.checkBox1.Location = new System.Drawing.Point(4, 4);
this.checkBox1.Name = "checkBox1";
this.checkBox1.Size = new System.Drawing.Size(80, 17);
this.checkBox1.TabIndex = 0;
this.checkBox1.Text = "checkBox1";
this.checkBox1.UseVisualStyleBackColor = true;

---

---

public Form1()
{
    InitializeComponent();
    panel1.Visible =false;
}


private void comboBox1_DropDown(object sender, EventArgs e)
{
    panel1.Visible = true;
}

private void comboBox1_DropDownClosed(object sender, EventArgs e)
{
    panel1.Visible = false;
}

回答by APrough

Just a quick glance at the screenshot, it seems like there are actually two controls, a combobox, and a checklistbox. It should be possible for you to use the DropDown method of the combobox make the checklistbox visible, then once users leave the checklistbox, append the checked values to the combobox as text (and make the checklistbox non-visible again). Just a thought; don't have access to an editor to see if this is possible or not, but it seems likely.

快速浏览一下屏幕截图，似乎实际上有两个控件，一个组合框和一个检查列表框。您应该可以使用组合框的 DropDown 方法使检查列表框可见，然后一旦用户离开检查列表框，将选中的值作为文本附加到组合框（并使检查列表框再次不可见）。只是一个想法; 无法访问编辑器以查看这是否可行，但似乎很有可能。