Set Two Items of a Property Grid from the Drop-down List

The MSDN-library does not contain a simple example demonstrating the picking-out item fromdrop-down list box for the property grid items. This sample demonstrates the techniquefor setting two items of a property grid from the drop-down list. These items have the type of string, but it must be simple to remake them for any other type.

Firstly, inherit the class from UITypeEditor:

	public class SelEditor : System.Drawing.Design.UITypeEditor	{        //this is a container for strings, which can be picked-out		ListBox Box1 = new ListBox();		IWindowsFormsEditorService edSvc;//this is a string array for drop-down list		public static string[] strList;		public SelEditor()		{			Box1.BorderStyle=BorderStyle.None;//add event handler for drop-down box when item will be selected			Box1.Click+=new EventHandler(Box1_Click);		}		public override System.Drawing.Design.UITypeEditorEditStyle GetEditStyle(System.ComponentModel.ITypeDescriptorContext context)		{			return UITypeEditorEditStyle.DropDown;		}		// Displays the UI for value selection.		public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, System.IServiceProvider provider, objectvalue)		{			Box1.Items.Clear();			Box1.Items.AddRange(strList);			Box1.Height=Box1.PreferredHeight;			// Uses the IWindowsFormsEditorService to display a 			// drop-down UI in the Properties window.			edSvc = (IWindowsFormsEditorService)provider.GetService(typeof(IWindowsFormsEditorService));			if( edSvc != null )			{				edSvc.DropDownControl( Box1 );				return Box1.SelectedItem;			}			return value;		}		private void Box1_Click(object sender, EventArgs e)		{			edSvc.CloseDropDown();		}	}

Secondly, describe a property in the class, displayed in the property grid:

	public class Class1	{//These are string arrays for different drop-down list.		string[] Str1= {"AAA","BBB","CCC","DDDD"};		string[] Str2= {"WW","EEE"};		string s1,s2;		public Class1()		{			//			// TODO: Add constructor logic here			//		}		[EditorAttribute(typeof(SelEditor), typeof(System.Drawing.Design.UITypeEditor))]		public string STR_1		{			get{SelEditor.strList=Str1; return s1;}			set{s1=value;}		}				[EditorAttribute(typeof(SelEditor), typeof(System.Drawing.Design.UITypeEditor))]		public string STR_2		{			get{SelEditor.strList=Str2; return s2;}			set{s2=value;}		}	}
Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

microsoft careers

Top Careers at Microsoft

Microsoft has gained its position as one of the top companies in the world, and Microsoft careers are flourishing. This multinational company is efficiently developing popular software and computers with other consumer electronics. It is a dream come true for so many people to acquire a high paid, high-prestige job

your company's audio

4 Areas of Your Company Where Your Audio Really Matters

Your company probably relies on audio more than you realize. Whether you’re creating a spoken text message to a colleague or giving a speech, you want your audio to shine. Otherwise, you could cause avoidable friction points and potentially hurt your brand reputation. For example, let’s say you create a

chrome os developer mode

How to Turn on Chrome OS Developer Mode

Google’s Chrome OS is a popular operating system that is widely used on Chromebooks and other devices. While it is designed to be simple and user-friendly, there are times when users may want to access additional features and functionality. One way to do this is by turning on Chrome OS