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Image ComboBox Control

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7 Jul 2005CDDL4 min read 365.2K   17.5K   117  
This is an extended, owner drawn ComboBox which has an added support to display images in the combobox dropdown as well as the edit (text) box.
using System;
using System.ComponentModel ;
using System.Reflection ;
using System.Runtime.Serialization;
using  System.ComponentModel.Design.Serialization;
using  System.ComponentModel.Design;

namespace ImageComboBox
{
	/// <summary>
	/// 
	/// </summary>
	public sealed class ImageComboItemConverter : ExpandableObjectConverter
	{
		public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
		{
			if(destinationType == typeof(System.ComponentModel.Design.Serialization .InstanceDescriptor))
				return true;
			else
				return base.CanConvertTo (context, destinationType);
		}

		public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
		{
			if(destinationType ==  typeof(System.ComponentModel.Design.Serialization.InstanceDescriptor))
			{
				Type valueType = value.GetType();
				ConstructorInfo ci = valueType.GetConstructor(System.Type.EmptyTypes);
				ImageComboBoxItem item = (ImageComboBoxItem)value;
				return new InstanceDescriptor(ci,null,false);
			}
			else
				return base.ConvertTo (context, culture, value, destinationType);
		}

		
	}
}

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This article, along with any associated source code and files, is licensed under The Common Development and Distribution License (CDDL)


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