我想做这样的事情:
public MyFunction(int integerParameter, string stringParameter){
//Do this:
LogParameters();
//Instead of this:
//Log.Debug("integerParameter: " + integerParameter +
// ", stringParameter: " + stringParameter);
}
public LogParameters(){
//Look up 1 level in the call stack (if possible),
//Programmatically loop through the function's parameters/values
//and log them to a file (with the function name as well).
//If I can pass a MethodInfo instead of analyzing the call stack, great.
}
我甚至不确定我想要做什么是可能的,但能够在运行时自动将参数名称/值输出到文件而不显式编写代码来记录它们会非常好。
有可能吗?
答案 0 :(得分:22)
我意识到人们与提到PostSharp的其他问题相关联,但我无法发布解决我的问题的代码(使用PostSharp),以便其他人可以从中受益。
class Program {
static void Main(string[] args) {
Trace.Listeners.Add(new TextWriterTraceListener(Console.Out));
new MyClass().MyMethod(44, "asdf qwer 1234", 3.14f, true);
Console.ReadKey();
}
}
public class MyClass {
public MyClass() {
}
[Trace("Debug")]
public int MyMethod(int x, string someString, float anotherFloat, bool theBool) {
return x + 1;
}
}
[Serializable]
public sealed class TraceAttribute : OnMethodBoundaryAspect {
private readonly string category;
public TraceAttribute(string category) {
this.category = category;
}
public string Category { get { return category; } }
public override void OnEntry(MethodExecutionArgs args) {
Trace.WriteLine(string.Format("Entering {0}.{1}.",
args.Method.DeclaringType.Name,
args.Method.Name), category);
for (int x = 0; x < args.Arguments.Count; x++) {
Trace.WriteLine(args.Method.GetParameters()[x].Name + " = " +
args.Arguments.GetArgument(x));
}
}
public override void OnExit(MethodExecutionArgs args) {
Trace.WriteLine("Return Value: " + args.ReturnValue);
Trace.WriteLine(string.Format("Leaving {0}.{1}.",
args.Method.DeclaringType.Name,
args.Method.Name), category);
}
}
简单地将Trace
属性添加到方法将导致输出非常好的调试信息,如下所示:
Debug: Entering MyClass.MyMethod.
x = 44
someString = asdf qwer 1234
anotherFloat = 3.14
theBool = True
Return Value: 45
Debug: Leaving MyClass.MyMethod.
答案 1 :(得分:12)
理论上可以关闭调试构建和优化,但实际上,我建议你想要一些源代码重写传递。
人们会不断告诉你反思会不会有效,所以here is the function that's actually capable of getting argument values。在启用优化的情况下,它不可能可靠地工作(例如,当内联打开时,甚至可能 堆栈帧)并安装调试器以便您可以调用功能不会像你希望的那样简单。
答案 2 :(得分:7)
StackTrace stackTrace = new StackTrace();
ParameterInfo[] parameters = stackTrace.GetFrame(1).GetMethod().GetParameters();
注意,GetFrame(1)获取调用方法而不是当前方法。这可以为您提供所需的结果,并允许您在LogParameters()中执行以下代码。
您需要调用LogParameters,因为您无法从ParameterInfo获取integerParameter和stringParameter的反射值。
LogParameters(integerParameter, stringParameter);
答案 3 :(得分:3)
除非您使用调试器API,否则无法在调用堆栈上循环访问不同方法的参数值。虽然你可以从callstack获取参数 names (正如其他人提到的那样)。
最接近的是:
public MyFunction(int integerParameter, string stringParameter){
LogParameters(integerParameter, stringParameter);
}
public void LogParameters(params object[] values){
// Get the parameter names from callstack and log names/values
}
答案 4 :(得分:3)
这是创建日志的Utility类。
internal class ParamaterLogModifiedUtility
{
private String _methodName;
private String _paramaterLog;
private readonly JavaScriptSerializer _serializer;
private readonly Dictionary<String, Type> _methodParamaters;
private readonly List<Tuple<String, Type, object>>_providedParametars;
public ParamaterLogModifiedUtility(params Expression<Func<object>>[] providedParameters)
{
try
{
_serializer = new JavaScriptSerializer();
var currentMethod = new StackTrace().GetFrame(1).GetMethod();
/*Set class and current method info*/
_methodName = String.Format("Class = {0}, Method = {1}", currentMethod.DeclaringType.FullName, currentMethod.Name);
/*Get current methods paramaters*/
_methodParamaters = new Dictionary<string, Type>();
(from aParamater in currentMethod.GetParameters()
select new { Name = aParamater.Name, DataType = aParamater.ParameterType })
.ToList()
.ForEach(obj => _methodParamaters.Add(obj.Name, obj.DataType));
/*Get provided methods paramaters*/
_providedParametars = new List<Tuple<string, Type, object>>();
foreach (var aExpression in providedParameters)
{
Expression bodyType = aExpression.Body;
if (bodyType is MemberExpression)
{
AddProvidedParamaterDetail((MemberExpression)aExpression.Body);
}
else if (bodyType is UnaryExpression)
{
UnaryExpression unaryExpression = (UnaryExpression)aExpression.Body;
AddProvidedParamaterDetail((MemberExpression)unaryExpression.Operand);
}
else
{
throw new Exception("Expression type unknown.");
}
}
/*Process log for all method parameters*/
ProcessLog();
}
catch (Exception exception)
{
throw new Exception("Error in paramater log processing.", exception);
}
}
private void ProcessLog()
{
try
{
foreach (var aMethodParamater in _methodParamaters)
{
var aParameter =
_providedParametars.Where(
obj => obj.Item1.Equals(aMethodParamater.Key) && obj.Item2 == aMethodParamater.Value).Single();
_paramaterLog += String.Format(@" ""{0}"":{1},", aParameter.Item1, _serializer.Serialize(aParameter.Item3));
}
_paramaterLog = (_paramaterLog != null) ? _paramaterLog.Trim(' ', ',') : string.Empty;
}
catch (Exception exception)
{
throw new Exception("MathodParamater is not found in providedParameters.");
}
}
private void AddProvidedParamaterDetail(MemberExpression memberExpression)
{
ConstantExpression constantExpression = (ConstantExpression) memberExpression.Expression;
var name = memberExpression.Member.Name;
var value = ((FieldInfo) memberExpression.Member).GetValue(constantExpression.Value);
var type = value.GetType();
_providedParametars.Add(new Tuple<string, Type, object>(name, type, value));
}
public String GetLog()
{
return String.Format("{0}({1})", _methodName, _paramaterLog);
}
}
使用实用程序
class PersonLogic
{
public bool Add(PersonEntity aPersonEntity, ushort age = 12, String id = "1", String name = "Roy")
{
string log = new ParamaterLogModifiedUtility(() => aPersonEntity, () => age, () => id, () => name).GetLog();
return true;
}
}
现在打电话给我们
class Program
{
static void Main(string[] args)
{
try
{
PersonLogic personLogic = new PersonLogic();
personLogic.Add(id: "1", age: 24, name: "Dipon", aPersonEntity: new PersonEntity() { Id = "1", Name = "Dipon", Age = 24 });
}
catch (Exception exception)
{
Console.WriteLine("Error.");
}
Console.ReadKey();
}
}
结果日志:
Class = MethodParamatersLog.Logic.PersonLogic, Method = Add("aPersonEntity":{"CreatedDateTime":"\/Date(1383422468353)\/","Id":"1","Name":"Dipon","Age":24}, "age":24, "id":"1", "name":"Dipon")
答案 5 :(得分:1)
我按照说明创建了这个类:
public static class Tracer
{
public static void Parameters(params object[] parameters)
{
#if DEBUG
var jss = new JavaScriptSerializer();
var stackTrace = new StackTrace();
var paramInfos = stackTrace.GetFrame(1).GetMethod().GetParameters();
var callingMethod = stackTrace.GetFrame(1).GetMethod();
Debug.WriteLine(string.Format("[Func: {0}", callingMethod.DeclaringType.FullName + "." + callingMethod.Name + "]"));
for (int i = 0; i < paramInfos.Count(); i++)
{
var currentParameterInfo = paramInfos[i];
var currentParameter = parameters[i];
Debug.WriteLine(string.Format(" Parameter: {0}", currentParameterInfo.Name));
Debug.WriteLine(string.Format(" Value: {0}", jss.Serialize(currentParameter)));
}
Debug.WriteLine("[End Func]");
#endif
}
}
这样称呼:
public void Send<T>(T command) where T : Command
{
Tracer.Parameters(command);
}
输出看起来像这样
[Func: SimpleCQRS.FakeBus.Send]
Parameter: command
Value: {"InventoryItemId":"f7005197-bd20-42a6-b35a-15a6dcc23c33","Name":"test record"}
[End Func]
编辑
.........
我扩展了我的示踪功能,真的为我做了很棒的工作。要跟踪每个函数及其调用函数等,可以使用StrackTrace.GetFrame(2)来使用附加功能。而现在我的输出更加丰富。我还使用Json.NET's库来输出漂亮的格式化JSON对象。此外,输出可以粘贴在空的JavaScript文件中,并查看彩色输出。
现在我的输出如下:
//Func: HomeController(Constructor): CQRSGui.Controllers.HomeController(Constructor)
//From: RuntimeTypeHandle.CreateInstance: System.RuntimeTypeHandle.CreateInstance
var parameters = {}
//Func: HomeController.Add: CQRSGui.Controllers.HomeController.Add
//From: System.Object lambda_method(System.Runtime.CompilerServices.Closure, System.Web.Mvc.ControllerBase, System.Object[])
var parameters = {
"name": "car"
}
//Func: Command(Constructor): SimpleCQRS.Command(Constructor)
//From: CreateInventoryItem(Constructor): SimpleCQRS.CreateInventoryItem(Constructor)
var parameters = {}
//Func: CreateInventoryItem(Constructor): SimpleCQRS.CreateInventoryItem(Constructor)
//From: HomeController.Add: CQRSGui.Controllers.HomeController.Add
var parameters = {
"inventoryItemId": "d974cd27-430d-4b22-ad9d-22ea0e6a2559",
"name": "car"
}
//Func: FakeBus.Send: SimpleCQRS.FakeBus.Send
//From: HomeController.Add: CQRSGui.Controllers.HomeController.Add
var parameters = {
"command": {
"InventoryItemId": "d974cd27-430d-4b22-ad9d-22ea0e6a2559",
"Name": "car"
}
}
//Func: InventoryCommandHandlers.Handle: SimpleCQRS.InventoryCommandHandlers.Handle
//From: FakeBus.Send: SimpleCQRS.FakeBus.Send
var parameters = {
"message": {
"InventoryItemId": "d974cd27-430d-4b22-ad9d-22ea0e6a2559",
"Name": "car"
}
}
//Func: AggregateRoot(Constructor): SimpleCQRS.AggregateRoot(Constructor)
//From: InventoryItem(Constructor): SimpleCQRS.InventoryItem(Constructor)
var parameters = {}
//Func: InventoryItem(Constructor): SimpleCQRS.InventoryItem(Constructor)
//From: InventoryCommandHandlers.Handle: SimpleCQRS.InventoryCommandHandlers.Handle
var parameters = {
"id": "d974cd27-430d-4b22-ad9d-22ea0e6a2559",
"name": "car"
}
//Func: Event(Constructor): SimpleCQRS.Event(Constructor)
//From: InventoryItemCreated(Constructor): SimpleCQRS.InventoryItemCreated(Constructor)
var parameters = {}
//Func: InventoryItemCreated(Constructor): SimpleCQRS.InventoryItemCreated(Constructor)
//From: InventoryItem(Constructor): SimpleCQRS.InventoryItem(Constructor)
var parameters = {
"id": "d974cd27-430d-4b22-ad9d-22ea0e6a2559",
"name": "car"
}
//Func: AggregateRoot.ApplyChange: SimpleCQRS.AggregateRoot.ApplyChange
//From: InventoryItem(Constructor): SimpleCQRS.InventoryItem(Constructor)
var parameters = {
"event": {
"Id": "d974cd27-430d-4b22-ad9d-22ea0e6a2559",
"Name": "car",
"Version": 0
}
}
功能强大,不是吗?我只需要查看输出,不需要一次又一次地破坏应用程序,也不需要检查手表和本地窗口。我喜欢这种方式。我已将tracker.Parameters
函数放在我的应用程序的所有位置,现在我已自动调试应用程序。
我在输出功能中添加的一件事是在序列化中调用错误事件。并从Json.NET处理。实际上你可能会陷入循环引用错误。我抓到了哪一个。此外,如果有更多的序列化错误,您可以捕获它们,然后您可以在参数对象输出下方显示序列化错误。