C# 如何定义让PropertyGrid控件显示[...]按钮，并且点击后以下拉框形式显示自定义控件编辑属性值

关于PropertyGrid控件的详细用法请参考文献：

1、C# PropertyGrid控件应用心得

2、C#自定义PropertyGrid属性

首先定义一个要在下拉框显示的控件：

using System;  
using System.Windows.Forms;  
namespace Simon.WinForms.Examples.PropertyGrid  
{  
    public class EditorControl : UserControl  
    {  
        public EditorControl()  
        {  
            this.label1 = new System.Windows.Forms.Label();  
            this.label1.AutoSize = true;  
            this.label1.Location = new System.Drawing.Point(21, 24);  
            this.label1.Name = "label1";  
            this.label1.Size = new System.Drawing.Size(41, 12);  
            this.label1.TabIndex = 0;  
            this.label1.Text = "名称：";  
  
            this.comboBox1 = new System.Windows.Forms.ComboBox();  
            this.comboBox1.FormattingEnabled = true;  
            this.comboBox1.Items.AddRange(new object[] {  
            "名称一",  
            "名称二",  
            "名称三",  
            "名称四"});  
            this.comboBox1.Location = new System.Drawing.Point(56, 21);  
            this.comboBox1.Name = "comboBox1";  
            this.comboBox1.Size = new System.Drawing.Size(133, 20);  
            this.comboBox1.TabIndex = 2;  
            this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged);  
  
            this.SuspendLayout();  
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);  
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;  
            this.Controls.Add(this.comboBox1);  
            this.Controls.Add(this.label1);  
            this.Name = "EditorControl";  
            this.Size = new System.Drawing.Size(210, 64);  
            this.ResumeLayout(false);  
            this.PerformLayout();  
        }  
  
        private Label label1;  
        private ComboBox comboBox1;  
  
        public string result = "";  
        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)  
        {  
            result = comboBox1.SelectedItem.ToString();  
        }  
    }  
}  

从System.Drawing.Design.UITypeEditor继承一个自定义属性编辑管理器类，参考如下：

using System.Drawing.Design;  
using System.Windows.Forms.Design;  
  
namespace Simon.WinForms.Examples.PropertyGrid  
{  
    public class Editor : UITypeEditor  
    {  
        public override UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context)  
        {  
            // 编辑属性值时，在右侧显示...更多按钮  
            return UITypeEditorEditStyle.Modal;  
        }  
  
        public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, System.IServiceProvider provider, object value)  
        {  
            var edSvc = provider.GetService(typeof(IWindowsFormsEditorService)) as IWindowsFormsEditorService;  
            if (edSvc != null)  
            {  
                var popedControl = new EditorControl();  
                // 还有ShowDialog这种方式，可以弹出一个窗体来进行编辑  
                edSvc.DropDownControl(popedControl);  
                value = popedControl.result;  
            }  
            return base.EditValue(context, provider, value);  
        }  
    }  
}  

定义一个使用PropertyGrid显示属性的类型。

using System.ComponentModel;  
  
namespace Simon.WinForms.Examples.PropertyGrid  
{  
    public class ShowedClass  
    {  
        [DisplayName("名称")]  
        [Editor(typeof(Editor), typeof(System.Drawing.Design.UITypeEditor))]  
        public string Name { get; set; }  
  
        [Editor(typeof(Editor), typeof(System.Drawing.Design.UITypeEditor))]  
        public string Description { get; set; }  
    }  
}  

在窗体上放好PropertyGrid，然后把你的类实例化后让PropertyGrid来显示设置就可以看到效果了。

propertyGrid1.SelectedObject = new ShowedClass() { Name="我没名字"};  

原文连接：C# 如何定义让PropertyGrid控件显示[...]按钮，并且点击后以下拉框形式显示自定义控件编辑属性值