93 lines
3.4 KiB
C#
93 lines
3.4 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="AppSettingsExpressionBuilder.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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namespace System.Web.Compilation {
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using System;
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using System.Security.Permissions;
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using System.CodeDom;
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using System.ComponentModel;
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using System.Configuration;
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using System.Diagnostics.CodeAnalysis;
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using System.Web.UI;
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using System.Web.Routing;
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using System.Collections.Generic;
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[ExpressionPrefix("Routes")]
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[ExpressionEditor("System.Web.UI.Design.RouteUrlExpressionEditor, " + AssemblyRef.SystemDesign)]
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public class RouteUrlExpressionBuilder : ExpressionBuilder {
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public override bool SupportsEvaluate {
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get {
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return true;
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}
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}
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public override CodeExpression GetCodeExpression(BoundPropertyEntry entry,
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object parsedData, ExpressionBuilderContext context) {
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return new CodeMethodInvokeExpression(
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new CodeTypeReferenceExpression(this.GetType()),
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"GetRouteUrl",
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new CodeThisReferenceExpression(),
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new CodePrimitiveExpression(entry.Expression.Trim()));
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}
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public override object EvaluateExpression(object target, BoundPropertyEntry entry,
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object parsedData, ExpressionBuilderContext context) {
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return GetRouteUrl(context.TemplateControl, entry.Expression.Trim());
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}
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public static bool TryParseRouteExpression(string expression, RouteValueDictionary routeValues, out string routeName) {
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routeName = null;
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if (String.IsNullOrEmpty(expression))
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return false;
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string[] pieces = expression.Split(new char[] { ',' });
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foreach (string piece in pieces) {
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string[] subs = piece.Split(new char[] { '=' });
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// Make sure we have exactly <key> = <value>
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if (subs.Length != 2) {
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return false;
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}
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string key = subs[0].Trim();
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string value = subs[1].Trim();
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if (string.IsNullOrEmpty(key)) {
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return false;
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}
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if (key.Equals("RouteName", StringComparison.OrdinalIgnoreCase)) {
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routeName = value;
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}
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else {
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routeValues[key] = value;
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}
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}
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return true;
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}
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[SuppressMessage("Microsoft.Design", "CA1055", Justification = "Consistent with other URL properties in ASP.NET.")]
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// Format will be <%$ ExpPrefix: RouteName = <name>, Key=Value, Key2=Value2 %>
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public static string GetRouteUrl(Control control, string expression) {
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if (control == null) {
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throw new ArgumentNullException("control");
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}
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string routeName = null;
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RouteValueDictionary routeParams = new RouteValueDictionary();
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if (TryParseRouteExpression(expression, routeParams, out routeName)) {
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return control.GetRouteUrl(routeName, routeParams);
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}
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else {
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throw new InvalidOperationException(SR.GetString(SR.RouteUrlExpression_InvalidExpression));
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}
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}
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}
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}
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