Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System/compmod/system/componentmodel/TimeSpanConverter.cs

@@ -0,0 +1,94 @@
+//------------------------------------------------------------------------------
+// <copyright file="TimeSpanConverter.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ */
+namespace System.ComponentModel {
+    using Microsoft.Win32;
+    using System.ComponentModel.Design.Serialization;
+    using System.Diagnostics;
+    using System.Globalization;
+    using System.Reflection;
+    using System.Runtime.InteropServices;
+    using System.Runtime.Remoting;
+    using System.Runtime.Serialization.Formatters;
+    using System.Security.Permissions;
+    using System.Threading;
+
+    /// <devdoc>
+    /// <para>Provides a type converter to convert <see cref='System.TimeSpan'/>
+    /// objects to and from various
+    /// other representations.</para>
+    /// </devdoc>
+    [HostProtection(SharedState = true)]
+    public class TimeSpanConverter : TypeConverter
+    {
+    
+        /// <devdoc>
+        ///    <para>Gets a value indicating whether this converter can
+        ///       convert an object in the given source type to a <see cref='System.TimeSpan'/> object using the
+        ///       specified context.</para>
+        /// </devdoc>
+        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) {
+            if (sourceType == typeof(string)) {
+                return true;
+            }
+            return base.CanConvertFrom(context, sourceType);
+        }
+
+        /// <devdoc>
+        ///    <para>Gets a value indicating whether this converter can
+        ///       convert an object to the given destination type using the context.</para>
+        /// </devdoc>
+        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType) {
+            if (destinationType == typeof(InstanceDescriptor)) {
+                return true;
+            }
+            return base.CanConvertTo(context, destinationType);
+        }
+
+        /// <devdoc>
+        /// <para>Converts the given object to a <see cref='System.TimeSpan'/>
+        /// object.</para>
+        /// </devdoc>
+        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture,  object value) {
+            if (value is string) {
+                string text = ((string)value).Trim();
+                try {
+                    return TimeSpan.Parse(text, culture);
+                }
+                catch (FormatException e) {
+                    throw new FormatException(SR.GetString(SR.ConvertInvalidPrimitive, (string)value, "TimeSpan"), e);
+                }
+            }
+            
+            return base.ConvertFrom(context, culture, value);
+        }
+        
+        /// <devdoc>
+        ///      Converts the given object to another type.  The most common types to convert
+        ///      are to and from a string object.  The default implementation will make a call
+        ///      to ToString on the object if the object is valid and if the destination
+        ///      type is string.  If this cannot convert to the desitnation type, this will
+        ///      throw a NotSupportedException.
+        /// </devdoc>
+        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
+            if (destinationType == null) {
+                throw new ArgumentNullException("destinationType");
+            }
+
+            if (destinationType == typeof(InstanceDescriptor) && value is TimeSpan) {
+                MethodInfo method = typeof(TimeSpan).GetMethod("Parse", new Type[] {typeof(string)});
+                if (method != null) {
+                    return new InstanceDescriptor(method, new object[] {value.ToString()});
+                }
+            }
+            
+            return base.ConvertTo(context, culture, value, destinationType);
+        }
+    }
+}
+