TraceSwitch.cs

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#define TRACE
namespace System.Diagnostics;
 
[SwitchLevel(typeof(TraceLevel))]
public class TraceSwitch : Switch
{
    public TraceLevel Level
    {
        get
        {
            return (TraceLevel)base.SwitchSetting;
        }
        set
        {
            if (value < TraceLevel.Off || value > TraceLevel.Verbose)
            {
                throw new ArgumentException(System.SR.TraceSwitchInvalidLevel);
            }
            base.SwitchSetting = (int)value;
        }
    }
 
    public bool TraceError => Level >= TraceLevel.Error;
 
    public bool TraceWarning => Level >= TraceLevel.Warning;
 
    public bool TraceInfo => Level >= TraceLevel.Info;
 
    public bool TraceVerbose => Level == TraceLevel.Verbose;
 
    public TraceSwitch(string displayName, string? description)
        : base(displayName, description)
    {
    }
 
    public TraceSwitch(string displayName, string? description, string defaultSwitchValue)
        : base(displayName, description, defaultSwitchValue)
    {
    }
 
    protected override void OnSwitchSettingChanged()
    {
        int switchSetting = base.SwitchSetting;
        if (switchSetting < 0)
        {
            Trace.WriteLine(System.SR.Format(System.SR.TraceSwitchLevelTooLow, base.DisplayName));
            base.SwitchSetting = 0;
        }
        else if (switchSetting > 4)
        {
            Trace.WriteLine(System.SR.Format(System.SR.TraceSwitchLevelTooHigh, base.DisplayName));
            base.SwitchSetting = 4;
        }
    }
 
    protected override void OnValueChanged()
    {
        base.SwitchSetting = (int)Enum.Parse(typeof(TraceLevel), base.Value, ignoreCase: true);
    }
}