HorizontalAlignConverter.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 / xsp / System / Web / UI / WebControls / HorizontalAlignConverter.cs / 1 / HorizontalAlignConverter.cs
                        

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

// 
 

 



 

namespace System.Web.UI.WebControls { 
 
    using System;
    using System.Collections; 
    using System.ComponentModel;
    using System.Globalization;

    internal class HorizontalAlignConverter : EnumConverter { 

        static string[] stringValues = new String[(int) HorizontalAlign.Justify + 1]; 
 
        static HorizontalAlignConverter () {
            stringValues[(int) HorizontalAlign.NotSet] = "NotSet"; 
            stringValues[(int) HorizontalAlign.Left] = "Left";
            stringValues[(int) HorizontalAlign.Center] = "Center";
            stringValues[(int) HorizontalAlign.Right] = "Right";
            stringValues[(int) HorizontalAlign.Justify] = "Justify"; 
        }
 
        // 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 HorizontalAlignConverter () : base(typeof(HorizontalAlign)) {} 

        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 HorizontalAlign.NotSet; 

                switch (textValue) {
                    case "NotSet":
                        return HorizontalAlign.NotSet; 
                    case "Left":
                        return HorizontalAlign.Left; 
                    case "Center": 
                        return HorizontalAlign.Center;
                    case "Right": 
                        return HorizontalAlign.Right;
                    case "Justify":
                        return HorizontalAlign.Justify;
                } 
            }
            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)HorizontalAlign.Justify)) { 
                return stringValues[(int) value];
            }

            return base.ConvertTo(context, culture, value, destinationType); 
        }
    } 
}

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