BooleanConverter.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / CompMod / System / ComponentModel / BooleanConverter.cs / 1 / BooleanConverter.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

/* 
 */ 
namespace System.ComponentModel {
    using Microsoft.Win32; 
    using System.Collections;
    using System.ComponentModel;
    using System.Diagnostics;
    using System.Globalization; 
    using System.Runtime.InteropServices;
    using System.Runtime.Remoting; 
    using System.Runtime.Serialization.Formatters; 
    using System.Security.Permissions;
 
    /// 
    ///    Provides a type converter to convert
    ///       Boolean objects to and from various other representations.
    ///  
    [HostProtection(SharedState = true)]
    public class BooleanConverter : TypeConverter { 
        private static StandardValuesCollection values; 

 
        /// 
        ///    Gets a value indicating whether this converter can
        ///       convert an object in the given source type to a Boolean object using the
        ///       specified context. 
        /// 
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { 
            if (sourceType == typeof(string)) { 
                return true;
            } 
            return base.CanConvertFrom(context, sourceType);
        }

        ///  
        ///    Converts the given value
        ///       object to a Boolean object. 
        ///  
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {
            if (value is string) { 
                string text = ((string)value).Trim();
                try {
                    return Boolean.Parse(text);
                } 
                catch (FormatException e) {
                    throw new FormatException(SR.GetString(SR.ConvertInvalidPrimitive, (string)value, "Boolean"), e); 
                } 
            }
            return base.ConvertFrom(context, culture, value); 
        }

        /// 
        ///    Gets a collection of standard values 
        ///       for the Boolean data type.
        ///  
        public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) { 
            if (values == null) {
                values = new StandardValuesCollection(new object[] {true, false}); 
            }
            return values;
        }
 
        /// 
        ///    Gets a value indicating whether the list of standard values returned from 
        ///     is an exclusive list.  
        /// 
        public override bool GetStandardValuesExclusive(ITypeDescriptorContext context) { 
            return true;
        }

        ///  
        ///    Gets a value indicating whether this object supports a standard set of values
        ///       that can be picked from a list. 
        ///  
        public override bool GetStandardValuesSupported(ITypeDescriptorContext context) {
            return true; 
        }
    }
}

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