65 lines
2.1 KiB
C#
65 lines
2.1 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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using System.Globalization;
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using Microsoft.AspNet.Http;
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namespace Microsoft.AspNet.Routing.Constraints
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{
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/// <summary>
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/// Constrains a route parameter to represent only <see cref="DateTime"/> values.
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/// </summary>
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/// <remarks>
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/// This constraint tries to parse strings by using all of the formats returned by the
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/// CultureInfo.InvariantCulture.DateTimeFormat.GetAllDateTimePatterns() method.
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/// For a sample on how to list all formats which are considered, please visit
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/// http://msdn.microsoft.com/en-us/library/aszyst2c(v=vs.110).aspx
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/// </remarks>
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public class DateTimeRouteConstraint : IRouteConstraint
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{
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/// <inheritdoc />
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public bool Match(
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HttpContext httpContext,
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IRouter route,
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string routeKey,
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RouteValueDictionary values,
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RouteDirection routeDirection)
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{
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if (httpContext == null)
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{
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throw new ArgumentNullException(nameof(httpContext));
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}
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if (route == null)
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{
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throw new ArgumentNullException(nameof(route));
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}
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if (routeKey == null)
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{
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throw new ArgumentNullException(nameof(routeKey));
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}
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if (values == null)
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{
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throw new ArgumentNullException(nameof(values));
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}
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object value;
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if (values.TryGetValue(routeKey, out value) && value != null)
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{
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if (value is DateTime)
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{
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return true;
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}
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DateTime result;
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var valueString = Convert.ToString(value, CultureInfo.InvariantCulture);
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return DateTime.TryParse(valueString, CultureInfo.InvariantCulture, DateTimeStyles.None, out result);
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}
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return false;
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}
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}
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} |