Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/DataBinding.cs

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+//------------------------------------------------------------------------------
+// <copyright file="DataBinding.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ */
+
+namespace System.Web.UI {
+
+    using System;
+    using System.ComponentModel;
+    using System.ComponentModel.Design;
+    using System.Data;
+    using System.Globalization;
+    using System.Security.Permissions;
+    using System.Web.Util;
+    
+
+    /// <devdoc>
+    ///    <para>Enables RAD designers to create data binding expressions 
+    ///       at design time. This class cannot be inherited.</para>
+    /// </devdoc>
+    public sealed class DataBinding {
+
+        private string propertyName;
+        private Type propertyType;
+        private string expression;
+
+
+        /// <devdoc>
+        /// <para>Initializes a new instance of the <see cref='System.Web.UI.DataBinding'/> class.</para>
+        /// </devdoc>
+        public DataBinding(string propertyName, Type propertyType, string expression) {
+            this.propertyName = propertyName;
+            this.propertyType = propertyType;
+            this.expression = expression;
+        }
+
+
+
+        /// <devdoc>
+        ///    <para>Indicates the data binding expression to be evaluated.</para>
+        /// </devdoc>
+        public string Expression {
+            get {
+                return expression;
+            }
+            set {
+                Debug.Assert((value != null) && (value.Length != 0),
+                             "Invalid expression");
+                expression = value;
+            }
+        }
+
+
+        /// <devdoc>
+        ///    <para>Indicates the name of the property that is to be data bound against. This 
+        ///       property is read-only.</para>
+        /// </devdoc>
+        public string PropertyName {
+            get {
+                return propertyName;
+            }
+        }
+
+
+        /// <devdoc>
+        ///    <para>Indicates the type of the data bound property. This property is 
+        ///       read-only.</para>
+        /// </devdoc>
+        public Type PropertyType {
+            get {
+                return propertyType;
+            }
+        }
+
+
+        /// <devdoc>
+        ///     DataBinding objects are placed in a hashtable representing the collection
+        ///     of bindings on a control. There can only be one binding/property, so
+        ///     the hashcode computation should match the Equals implementation and only
+        ///    take the property name into account.
+        /// </devdoc>
+        public override int GetHashCode() {
+            return propertyName.ToLower(CultureInfo.InvariantCulture).GetHashCode();
+        }
+
+
+        /// <devdoc>
+        /// </devdoc>
+        public override bool Equals(object obj) {
+            if ((obj != null) && (obj is DataBinding)) {
+                DataBinding binding = (DataBinding)obj;
+
+                return StringUtil.EqualsIgnoreCase(propertyName, binding.PropertyName);
+            }
+            return false;
+        }
+    }
+}
+