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/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Services / Messaging / System / Messaging / Design / MessageQueueConverter.cs / 1305376 / MessageQueueConverter.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Messaging.Design { using System.Messaging; using System.Threading; using System.ComponentModel; using System.ComponentModel.Design; using System.Diagnostics; using System; using System.Drawing; using System.Windows.Forms; using System.Windows.Forms.Design; using System.Windows.Forms.ComponentModel; using System.ComponentModel.Design.Serialization; using System.Reflection; using System.Messaging.Interop; using System.Collections; using System.Collections.Specialized; using System.Globalization; ////// internal class MessageQueueConverter : TypeConverter { private static Hashtable componentsCreated = new Hashtable(StringComparer.InvariantCultureIgnoreCase); /// /// public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { if (sourceType == typeof(string)) { return true; } return base.CanConvertFrom(context, sourceType); } internal static void AddToCache(MessageQueue queue) { componentsCreated[queue.Path] = queue; } /// /// public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { if (value != null && value is string) { string text = ((string)value).Trim(); if (text == String.Empty) return null; if (text.CompareTo(Res.GetString(Res.NotSet)) != 0) { MessageQueue newQueue = GetFromCache(text); if (newQueue != null) return newQueue; else { newQueue = new MessageQueue(text); AddToCache(newQueue); if (context != null) context.Container.Add(newQueue); return newQueue; } } } return null; } /// /// public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) { if (destinationType != null && destinationType == typeof(string)) { if (value != null) return((MessageQueue)value).Path; else return Res.GetString(Res.NotSet); } return base.ConvertTo(context, culture, value, destinationType); } internal static MessageQueue GetFromCache(string path) { if (componentsCreated.ContainsKey(path)) { MessageQueue existingComponent = (MessageQueue)componentsCreated[path]; if (existingComponent.Site == null) componentsCreated.Remove(path); else { if (existingComponent.Path == path) return existingComponent; else componentsCreated.Remove(path); } } return null; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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