Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Services / Monitoring / system / Diagnosticts / Design / InstanceNameConverter.cs / 1 / InstanceNameConverter.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 InstanceNameConverter : TypeConverter { ////// /// public InstanceNameConverter() { } 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); } ////// Initializes a new instance of the 'InstanceNameConverter' class for the given type. /// ////// /// /// 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[] retVal =cat.GetInstanceNames(); Array.Sort(retVal, Comparer.Default); return new StandardValuesCollection(retVal); } catch(Exception) { ; // do nothing } return null; } ///Gets a collection of standard values for the data type this validator is /// designed for. ////// /// /// 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.Gets a value indicating /// whether this object /// supports a standard set of values that can be picked /// from a list using the specified context. ///
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