91 lines
3.0 KiB
C#
91 lines
3.0 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="VerticalAlignConverter.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//------------------------------------------------------------------------------
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//
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namespace System.Web.UI.WebControls {
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using System;
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using System.Collections;
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using System.ComponentModel;
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using System.Globalization;
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internal class VerticalAlignConverter : EnumConverter {
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static string[] stringValues = new String[(int) VerticalAlign.Bottom + 1];
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static VerticalAlignConverter () {
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stringValues[(int) VerticalAlign.NotSet] = "NotSet";
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stringValues[(int) VerticalAlign.Top] = "Top";
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stringValues[(int) VerticalAlign.Middle] = "Middle";
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stringValues[(int) VerticalAlign.Bottom] = "Bottom";
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}
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// this constructor needs to be public despite the fact that it's in an internal
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// class so it can be created by Activator.CreateInstance.
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public VerticalAlignConverter () : base(typeof(VerticalAlign)) {}
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public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) {
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if (sourceType == typeof(string)) {
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return true;
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}
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else {
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return base.CanConvertFrom(context, sourceType);
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}
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}
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public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) {
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if (value == null)
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return null;
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if (value is string) {
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string textValue = ((string)value).Trim();
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if (textValue.Length == 0)
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return VerticalAlign.NotSet;
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switch (textValue) {
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case "NotSet":
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return VerticalAlign.NotSet;
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case "Top":
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return VerticalAlign.Top;
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case "Middle":
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return VerticalAlign.Middle;
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case "Bottom":
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return VerticalAlign.Bottom;
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}
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}
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return base.ConvertFrom(context, culture, value);
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}
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public override bool CanConvertTo(ITypeDescriptorContext context, Type sourceType) {
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if (sourceType == typeof(string)) {
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return true;
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}
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return base.CanConvertTo(context, sourceType);
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}
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public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType) {
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if (destinationType == typeof(string) && ((int) value <= (int)VerticalAlign.Bottom)) {
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return stringValues[(int) value];
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}
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return base.ConvertTo(context, culture, value, destinationType);
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}
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}
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}
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