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//------------------------------------------------------------------------------
// <copyright file="RouteParameter.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.UI.WebControls {
using System;
using System.ComponentModel;
using System.Data;
using System.Security.Permissions;
using System.Web.Routing;
/// <devdoc>
/// Represents a Parameter that gets its value from the application's route data.
/// </devdoc>
[
DefaultProperty("RouteKey"),
]
public class RouteParameter : Parameter {
/// <devdoc>
/// Creates an instance of the RouteParameter class.
/// </devdoc>
public RouteParameter() {
}
/// <devdoc>
/// Creates an instance of the RouteParameter class with the specified parameter name and request field.
/// </devdoc>
public RouteParameter(string name, string routeKey) : base(name) {
RouteKey = routeKey;
}
/// <devdoc>
/// Creates an instance of the routeParameter class with the specified parameter name, database type, and
/// request field.
/// </devdoc>
public RouteParameter(string name, DbType dbType, string routeKey)
: base(name, dbType) {
RouteKey = routeKey;
}
/// <devdoc>
/// Creates an instance of the RouteParameter class with the specified parameter name, type, and request field.
/// </devdoc>
public RouteParameter(string name, TypeCode type, string routeKey) : base(name, type) {
RouteKey = routeKey;
}
/// <devdoc>
/// Used to clone a parameter.
/// </devdoc>
protected RouteParameter(RouteParameter original) : base(original) {
RouteKey = original.RouteKey;
}
/// <devdoc>
/// The name of the route value to get the value from.
/// </devdoc>
[
DefaultValue(""),
WebCategory("Parameter"),
WebSysDescription(SR.RouteParameter_RouteKey),
]
public string RouteKey {
get {
object o = ViewState["RouteKey"];
if (o == null)
return String.Empty;
return (string)o;
}
set {
if (RouteKey != value) {
ViewState["RouteKey"] = value;
OnParameterChanged();
}
}
}
/// <devdoc>
/// Creates a new RouteParameter that is a copy of this RouteParameter.
/// </devdoc>
protected override Parameter Clone() {
return new RouteParameter(this);
}
/// <devdoc>
/// Returns the updated value of the parameter.
/// </devdoc>
protected internal override object Evaluate(HttpContext context, Control control) {
if (context == null || context.Request == null || control == null) {
return null;
}
RouteData routeData = control.Page.RouteData;
if (routeData == null) {
return null;
}
return routeData.Values[RouteKey];
}
}
}
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