DynamicRouteExpression.cs source code in C# .NET

Source code for the .NET framework in C#



/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / xsp / System / DynamicData / DynamicData / DynamicRouteExpression.cs / 1305376 / DynamicRouteExpression.cs

                            using System.Collections; 
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Web.DynamicData.Util; 
using System.Web.UI;
using System.Web.UI.WebControls; 
using System.Diagnostics; 
using Microsoft.Web.Data.UI.WebControls.Expressions; 
using Microsoft.Web.Data.UI.WebControls;
using System.Web.UI.WebControls.Expressions;

namespace System.Web.DynamicData { 
    /// This class is an QueryExtender-based equivalent of DynamicQueryStringParameters. 
    /// When applied to a data source it will filter the data by the value of a primary key encoded
    /// in the requests query string (or potentially routing if complex routes are used). If ColumnName
    /// is specified it will retrieve the values
    public class DynamicRouteExpression : DataSourceExpression {
        private PropertyExpression _expression = new PropertyExpression(); 
        /// An optional column name that can be used to change the filtering mode (i.e. filter by foreign key instead 
        /// of primary key).
        public string ColumnName { get; set; } 

        /// See base class. 
        public override void SetContext(Control owner, HttpContext context, IQueryableDataSource dataSource) { 
            base.SetContext(owner, context, dataSource);

            owner.Page.InitComplete += new EventHandler(Page_InitComplete);

        void Page_InitComplete(object sender, EventArgs e) { 
            Debug.Assert(DataSource != null); 
            var table = DataSource.GetMetaTable();
            IEnumerable parameters = RouteParametersHelper.GetColumnParameters(table, ColumnName);
            parameters.ToList().ForEach(p => _expression.Parameters.Add(p));
        /// See base class. 
        public override IQueryable GetQueryable(IQueryable source) {
            return _expression.GetQueryable(source); 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.


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