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//------------------------------------------------------------------------------
// <copyright file="VerticalAlignConverter.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 VerticalAlignConverter : EnumConverter {
static string[] stringValues = new String[(int) VerticalAlign.Bottom + 1];
static VerticalAlignConverter () {
stringValues[(int) VerticalAlign.NotSet] = "NotSet";
stringValues[(int) VerticalAlign.Top] = "Top";
stringValues[(int) VerticalAlign.Middle] = "Middle";
stringValues[(int) VerticalAlign.Bottom] = "Bottom";
}
// 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 VerticalAlignConverter () : base(typeof(VerticalAlign)) {}
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 VerticalAlign.NotSet;
switch (textValue) {
case "NotSet":
return VerticalAlign.NotSet;
case "Top":
return VerticalAlign.Top;
case "Middle":
return VerticalAlign.Middle;
case "Bottom":
return VerticalAlign.Bottom;
}
}
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)VerticalAlign.Bottom)) {
return stringValues[(int) value];
}
return base.ConvertTo(context, culture, value, destinationType);
}
}
}
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