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//------------------------------------------------------------------------------
// <copyright file="HorizontalAlignConverter.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 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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