WqlEventQuery.Condition Property

Definition

Namespace:

System.Management

Assembly:

System.Management.dll

Package:

System.Management v8.0.0

Source:

ManagementQuery.cs

Gets or sets the condition to be applied to events of the specified class.

public:
 property System::String ^ Condition { System::String ^ get(); void set(System::String ^ value); };

public string Condition { get; set; }

member this.Condition : string with get, set

Public Property Condition As String

Property Value

String

Returns a String value containing the condition or conditions in the event query.

Examples

The following example initializes a new WqlEventQuery and displays the event query string.

using System;
using System.Management;

public class EventSample
{
    public static void Main(string[] args)
    {
        WqlEventQuery query = new WqlEventQuery();
        query.EventClassName = "__InstanceCreationEvent";
        query.Condition = "TargetInstance ISA 'Win32_NTLogEvent'";
        query.GroupWithinInterval = new TimeSpan(0, 0, 10);
        System.Collections.Specialized.StringCollection collection =
            new System.Collections.Specialized.StringCollection();
        collection.Add("TargetInstance.SourceName");
        query.GroupByPropertyList = collection;
        query.HavingCondition = "NumberOfEvents > 25";

        Console.WriteLine(query.QueryString);
        return;
    }
}

Imports System.Management


Public Class EventSample
    Public Overloads Shared Function _
        Main(ByVal args() As String) As Integer

        Dim query As New WqlEventQuery
        query.EventClassName = "__InstanceCreationEvent"
        query.Condition = "TargetInstance ISA 'Win32_NTLogEvent'"
        query.GroupWithinInterval = New TimeSpan(0, 0, 10)
        Dim collection As New System.Collections.Specialized. _
            StringCollection
        collection.Add("TargetInstance.SourceName")
        query.GroupByPropertyList = collection
        query.HavingCondition = "NumberOfEvents > 25"

        MessageBox.Show(query.QueryString)

    End Function 'Main
End Class

Remarks

Setting this property value overrides any previous value stored in the object. The query string is rebuilt to reflect the new condition.

Property Value

The condition is represented as a string, containing one or more clauses of the form: <propName> <operator> <value> combined with logical operators. <propName> must represent a property defined on the event class specified in this query.

.NET Framework Security

Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.