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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