public CounterSample NextSample()
{
string categoryName = this.categoryName;
string machineName = this.machineName;
new PerformanceCounterPermission(PerformanceCounterPermissionAccess.Browse, machineName, categoryName).Demand();
this.Initialize();
CategorySample categorySample = PerformanceCounterLib.GetCategorySample(machineName, categoryName);
CounterDefinitionSample counterDefinitionSample = categorySample.GetCounterDefinitionSample(this.counterName);
this.counterType = counterDefinitionSample.CounterType;
if (!categorySample.IsMultiInstance)
{
if ((this.instanceName != null) && (this.instanceName.Length != 0))
{
throw new InvalidOperationException(SR.GetString("InstanceNameProhibited", new object[] { this.instanceName }));
}
return(counterDefinitionSample.GetSingleValue());
}
if ((this.instanceName == null) || (this.instanceName.Length == 0))
{
throw new InvalidOperationException(SR.GetString("InstanceNameRequired"));
}
return(counterDefinitionSample.GetInstanceValue(this.instanceName));
}
// Will cause an update, raw value
/// <include file='doc\PerformanceCounter.uex' path='docs/doc[@for="PerformanceCounter.NextSample"]/*' />
/// <devdoc>
/// Obtains a counter sample and returns the raw value for it.
/// </devdoc>
public CounterSample NextSample()
{
Initialize();
CategorySample categorySample = PerformanceCounterLib.GetCategorySample(this.machineName, this.categoryName);
try {
CounterDefinitionSample counterSample = categorySample.GetCounterDefinitionSample(this.counterName);
this.counterType = counterSample.CounterType;
if (counterSample.IsSingleInstance)
{
if (instanceName != null && instanceName.Length != 0)
{
throw new InvalidOperationException(SR.GetString(SR.InstanceNameProhibited, this.instanceName));
}
return(counterSample.GetSingleValue());
}
else
{
if (instanceName == null || instanceName.Length == 0)
{
throw new InvalidOperationException(SR.GetString(SR.InstanceNameRequired));
}
return(counterSample.GetInstanceValue(this.instanceName));
}
}
finally {
categorySample.Dispose();
}
}
// Will cause an update, raw value
/// <summary>
/// Obtains a counter sample and returns the raw value for it.
/// </summary>
public CounterSample NextSample()
{
string currentCategoryName = _categoryName;
string currentMachineName = _machineName;
Initialize();
using (CategorySample categorySample = PerformanceCounterLib.GetCategorySample(currentMachineName, currentCategoryName))
{
CounterDefinitionSample counterSample = categorySample.GetCounterDefinitionSample(_counterName);
_counterType = counterSample._counterType;
if (!categorySample._isMultiInstance)
{
if (_instanceName != null && _instanceName.Length != 0)
{
throw new InvalidOperationException(SR.Format(SR.InstanceNameProhibited, _instanceName));
}
return(counterSample.GetSingleValue());
}
else
{
if (_instanceName == null || _instanceName.Length == 0)
{
throw new InvalidOperationException(SR.InstanceNameRequired);
}
return(counterSample.GetInstanceValue(_instanceName));
}
}
}
// Will cause an update, raw value
/// <devdoc>
/// Obtains a counter sample and returns the raw value for it.
/// </devdoc>
public CounterSample NextSample()
{
string currentCategoryName = categoryName;
string currentMachineName = machineName;
PerformanceCounterPermission permission = new PerformanceCounterPermission(PerformanceCounterPermissionAccess.Read, currentMachineName, currentCategoryName);
permission.Demand();
Initialize();
CategorySample categorySample = PerformanceCounterLib.GetCategorySample(currentMachineName, currentCategoryName);
CounterDefinitionSample counterSample = categorySample.GetCounterDefinitionSample(this.counterName);
this.counterType = counterSample.CounterType;
if (!categorySample.IsMultiInstance)
{
if (instanceName != null && instanceName.Length != 0)
{
throw new InvalidOperationException(SR.GetString(SR.InstanceNameProhibited, this.instanceName));
}
return(counterSample.GetSingleValue());
}
else
{
if (instanceName == null || instanceName.Length == 0)
{
throw new InvalidOperationException(SR.GetString(SR.InstanceNameRequired));
}
return(counterSample.GetInstanceValue(this.instanceName));
}
}