Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/WebControls/VerticalAlignConverter.cs

@@ -0,0 +1,90 @@
+//------------------------------------------------------------------------------
+// <copyright file="VerticalAlignConverter.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+// 
+
+
+
+
+
+
+
+
+namespace System.Web.UI.WebControls {
+
+    using System;
+    using System.Collections;
+    using System.ComponentModel;
+    using System.Globalization;
+
+    internal class VerticalAlignConverter : EnumConverter {
+
+        static string[] stringValues = new String[(int) VerticalAlign.Bottom + 1];
+
+        static VerticalAlignConverter () { 
+            stringValues[(int) VerticalAlign.NotSet] = "NotSet";
+            stringValues[(int) VerticalAlign.Top] = "Top";
+            stringValues[(int) VerticalAlign.Middle] = "Middle";
+            stringValues[(int) VerticalAlign.Bottom] = "Bottom";
+        }
+
+        // this constructor needs to be public despite the fact that it's in an internal
+        // class so it can be created by Activator.CreateInstance.
+        public VerticalAlignConverter () : base(typeof(VerticalAlign)) {}
+
+        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) {
+            if (sourceType == typeof(string)) {
+                return true;
+            }
+            else {
+                return base.CanConvertFrom(context, sourceType);
+            }
+        }
+
+        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {
+            if (value == null)
+                return null;
+
+            if (value is string) {
+                string textValue = ((string)value).Trim();
+                if (textValue.Length == 0)
+                    return VerticalAlign.NotSet;
+
+                switch (textValue) {
+                    case "NotSet":
+                        return VerticalAlign.NotSet;
+                    case "Top":
+                        return VerticalAlign.Top;
+                    case "Middle":
+                        return VerticalAlign.Middle;
+                    case "Bottom":
+                        return VerticalAlign.Bottom;
+                }
+            }
+            
+            return base.ConvertFrom(context, culture, value);
+        }
+        
+        public override bool CanConvertTo(ITypeDescriptorContext context, Type sourceType) {
+            if (sourceType == typeof(string)) {
+                return true;
+            }
+
+            return base.CanConvertTo(context, sourceType);
+        }
+        
+        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
+            if (destinationType == typeof(string) && ((int) value <= (int)VerticalAlign.Bottom)) {
+                return stringValues[(int) value];
+            }
+
+            return base.ConvertTo(context, culture, value, destinationType);
+        }
+    }
+}
+
+
+