DynamicFilterExpression.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

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

                        
                            using System.Linq.Expressions; 
using System.Web.UI;
using System.Globalization;
using System.Diagnostics.CodeAnalysis;
using System.Linq; 
#if ORYX_VNEXT
    using Microsoft.Web.Data.UI.WebControls.Expressions; 
    using Microsoft.Web.Data.UI.WebControls; 
#else
    using System.Web.UI.WebControls.Expressions; 
    using System.Web.UI.WebControls;
#endif

namespace System.Web.DynamicData { 
    /// 
    /// This is a Dynamic Data-specific extension of DataSourceExpression that works by forwarding the processing of an IQueryable to 
    /// a specialized control such as QueryableFilterRepeater or DynamicFilter. 
    /// 
    public class DynamicFilterExpression : DataSourceExpression { 
        /// 
        /// References the ID of a QueryableFilterRepeater or DynamicFilter control on the page.
        /// 
        [SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "ID", Justification = "This refers to a Control ID")] 
        public string ControlID { get; set; }
        private IFilterExpressionProvider FilterExpressionProvider { get; set; } 
 
        public override void SetContext(Control owner, HttpContext context, IQueryableDataSource dataSource) {
            base.SetContext(owner, context, dataSource); 

            FilterExpressionProvider = FindControl(Owner);
            FilterExpressionProvider.Initialize(dataSource);
        } 

        private IFilterExpressionProvider FindControl(Control control) { 
            var result = Misc.FindControl(control, ControlID) as IFilterExpressionProvider; 
            if (result == null) {
                throw new InvalidOperationException(String.Format(CultureInfo.CurrentCulture, "The control '{0}' could not be found.", ControlID)); 
            }
            return result;
        }
 
        /// 
        /// Delegates the processing of the source queryable to the control referenced by ControlID. 
        ///  
        /// 
        ///  
        public override IQueryable GetQueryable(IQueryable source) {
            IQueryable result = FilterExpressionProvider.GetQueryable(source);
            return result;
        } 
    }
} 

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

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