63 lines
1.8 KiB
C#
63 lines
1.8 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.AspNetCore.Http;
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namespace Microsoft.AspNetCore.Routing.Constraints
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{
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/// <summary>
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/// Constrains a route parameter to represent only 32-bit floating-point values.
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/// </summary>
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public class FloatRouteConstraint : 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 float)
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{
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return true;
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}
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float result;
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var valueString = Convert.ToString(value, CultureInfo.InvariantCulture);
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return float.TryParse(
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valueString,
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NumberStyles.Float | NumberStyles.AllowThousands,
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CultureInfo.InvariantCulture,
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out result);
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}
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return false;
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}
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}
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} |