Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / System / ComponentModel / DesignerAttribute.cs / 1 / DesignerAttribute.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ namespace System.ComponentModel { using System; using System.ComponentModel; using System.ComponentModel.Design; using System.Diagnostics; using System.Globalization; using System.Security.Permissions; ////// [AttributeUsage(AttributeTargets.Class | AttributeTargets.Interface, AllowMultiple = true, Inherited = true)] public sealed class DesignerAttribute : Attribute { private readonly string designerTypeName; private readonly string designerBaseTypeName; private string typeId; ///Specifies the class to use to implement design-time services. ////// public DesignerAttribute(string designerTypeName) { string temp = designerTypeName.ToUpper(CultureInfo.InvariantCulture); Debug.Assert(temp.IndexOf(".DLL") == -1, "Came across: " + designerTypeName + " . Please remove the .dll extension"); this.designerTypeName = designerTypeName; this.designerBaseTypeName = typeof(IDesigner).FullName; } ////// Initializes a new instance of the ///class using the name of the type that /// provides design-time services. /// /// public DesignerAttribute(Type designerType) { this.designerTypeName = designerType.AssemblyQualifiedName; this.designerBaseTypeName = typeof(IDesigner).FullName; } ////// Initializes a new instance of the ///class using the type that provides /// design-time services. /// /// public DesignerAttribute(string designerTypeName, string designerBaseTypeName) { string temp = designerTypeName.ToUpper(CultureInfo.InvariantCulture); Debug.Assert(temp.IndexOf(".DLL") == -1, "Came across: " + designerTypeName + " . Please remove the .dll extension"); this.designerTypeName = designerTypeName; this.designerBaseTypeName = designerBaseTypeName; } ////// Initializes a new instance of the ///class using the designer type and the /// base class for the designer. /// /// public DesignerAttribute(string designerTypeName, Type designerBaseType) { string temp = designerTypeName.ToUpper(CultureInfo.InvariantCulture); Debug.Assert(temp.IndexOf(".DLL") == -1, "Came across: " + designerTypeName + " . Please remove the .dll extension"); this.designerTypeName = designerTypeName; this.designerBaseTypeName = designerBaseType.AssemblyQualifiedName; } ////// Initializes a new instance of the ///class, using the name of the designer /// class and the base class for the designer. /// /// public DesignerAttribute(Type designerType, Type designerBaseType) { this.designerTypeName = designerType.AssemblyQualifiedName; this.designerBaseTypeName = designerBaseType.AssemblyQualifiedName; } ////// Initializes a new instance of the ///class using the types of the designer and /// designer base class. /// /// public string DesignerBaseTypeName { get { return designerBaseTypeName; } } ////// Gets /// the name of the base type of this designer. /// ////// public string DesignerTypeName { get { return designerTypeName; } } ////// Gets the name of the designer type associated with this designer attribute. /// ////// /// public override object TypeId { get { if (typeId == null) { string baseType = designerBaseTypeName; int comma = baseType.IndexOf(','); if (comma != -1) { baseType = baseType.Substring(0, comma); } typeId = GetType().FullName + baseType; } return typeId; } } public override bool Equals(object obj) { if (obj == this) { return true; } DesignerAttribute other = obj as DesignerAttribute; return (other != null) && other.designerBaseTypeName == designerBaseTypeName && other.designerTypeName == designerTypeName; } public override int GetHashCode() { return designerTypeName.GetHashCode() ^ designerBaseTypeName.GetHashCode(); } } }/// This defines a unique ID for this attribute type. It is used /// by filtering algorithms to identify two attributes that are /// the same type. For most attributes, this just returns the /// Type instance for the attribute. DesignerAttribute overrides /// this to include the type of the designer base type. /// ///
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