CounterNameConverter.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Services / Monitoring / system / Diagnosticts / Design / CounterNameConverter.cs / 1 / CounterNameConverter.cs

                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Diagnostics.Design { 
    using System.Runtime.Serialization.Formatters; 
    using System.Globalization;
    using System.Diagnostics; 
    using System;
    using System.Windows.Forms.ComponentModel;
    using System.ComponentModel;
    using System.ComponentModel.Design; 
    using System.Collections;
 
    internal class CounterNameConverter : TypeConverter { 

        ///  
        /// 
        ///    
        ///       Initializes a new instance of the 'CounterNameConverter' class for the given type.
        ///     
        /// 
        public CounterNameConverter() { 
        } 

        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType) { 
            if (sourceType == typeof(string)) {
                return true;
            }
            return base.CanConvertFrom(context, sourceType); 
        }
 
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value) { 
            if (value is string) {
                string text = ((string)value).Trim(); 
                return text;
            }
            return base.ConvertFrom(context, culture, value);
        } 

        ///  
        ///  
        /// 
        ///    Gets a collection of standard values for the data type this validator is 
        ///       designed for.
        /// 
        public override StandardValuesCollection GetStandardValues(ITypeDescriptorContext context) {
            PerformanceCounter counter = (context == null) ? null : context.Instance as PerformanceCounter; 

            string machineName = "."; 
            string categoryName = String.Empty; 
            if (counter != null) {
                machineName = counter.MachineName; 
                categoryName = counter.CategoryName;
            }

            try { 
                PerformanceCounterCategory cat = new PerformanceCounterCategory(categoryName, machineName);
                string[] instanceNames = cat.GetInstanceNames(); 
                PerformanceCounter[] counters = null; 
                if (instanceNames.Length == 0)
                    counters = cat.GetCounters(); 
                else
                    counters = cat.GetCounters(instanceNames[0]);

                string[] retVal = new string[counters.Length]; 

                for (int i = 0; i < counters.Length; i++) { 
                    retVal[i] = counters[i].CounterName; 
                }
 
                Array.Sort(retVal, Comparer.Default);
                return new StandardValuesCollection(retVal);
            }
            catch (Exception) { 
                ; // do nothing
            } 
 
            return null;
        } 

        /// 
        /// 
        ///  
        ///    Gets a value indicating
        ///       whether this object 
        ///       supports a standard set of values that can be picked 
        ///       from a list using the specified context.
        ///  
        public override bool GetStandardValuesSupported(ITypeDescriptorContext context) {
            return true;
        }
    } 
}

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

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