EventLogQuery.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 / Core / System / Diagnostics / Eventing / Reader / EventLogQuery.cs / 1305376 / EventLogQuery.cs

                            // ==++== 
//
//   Copyright (c) Microsoft Corporation.  All rights reserved.
//
// ==--== 
/*============================================================
** 
** Class: EventLogQuery 
**
** Purpose: 
** This public class allows a user to define events of interest.
** An instance of this class is passed to an EventReader to actually
** obtain the EventRecords.   The EventLogQuery can be as
** simple specifying that all events are of interest, or it can contain 
** query / xpath expressions that indicate exactly what characteristics
** events should have. 
** 
============================================================*/
using System; 
using System.Collections.Generic;
using System.Runtime.InteropServices;

 
namespace System.Diagnostics.Eventing.Reader {
 
    ///  
    /// Allows a user to define events of interest. An instance of this
    /// class is passed to an EventReader to actually obtain the EventRecords. 
    /// The EventLogQuery can be as simple specifying that all events are of
    /// interest, or it can contain query / xpath expressions that indicate exactly
    /// what characteristics events should have.
    ///  
    public class EventLogQuery {
 
        private string query; 
        private string path;
        private EventLogSession session; 
        private PathType pathType;
        private bool tolerateErrors = false;
        private bool reverseDirection = false;
 
        public EventLogQuery(string path, PathType pathType)
            : this(path, pathType, null) { 
        } 

        public EventLogQuery(string path, PathType pathType, string query) { 

            this.session = EventLogSession.GlobalSession;
            this.path = path;   // can be null
            this.pathType = pathType; 

            if (query == null) { 
                if (path == null) 
                    throw new ArgumentNullException("path");
            } 
            else {
                this.query = query;
            }
        } 

        public EventLogSession Session { 
            get { 
                return this.session;
            } 
            set {
                this.session = value;
            }
        } 

        public bool TolerateQueryErrors { 
            get { 
                return this.tolerateErrors;
            } 
            set {
                this.tolerateErrors = value;
            }
        } 

        public bool ReverseDirection { 
            get { 
                return this.reverseDirection;
            } 
            set {
                this.reverseDirection = value;
            }
        } 

        internal string Path { 
            get { 
                return this.path;
            } 
        }

        internal PathType ThePathType {
            get { 
                return this.pathType;
            } 
        } 

        internal string Query { 
            get {
                return this.query;
            }
        } 

    } 
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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