静态对象会收集垃圾吗？ [英] Will static object get garbage collected ?

问题描述

如果我在一个类中声明静态对象，他们会不会收集垃圾？该类由作为Windows服务运行的WCF服务访问。那些是COM对象。类不是静态的，而是对象。使用这些对象的方法是在此类中定义的非静态方法。

 命名空间 AGVController.BL 
 {
  public   class  AGV 
 {
 
  private   static  CHILKATSOCKETLib.ChilkatSocketClass objEle =  new  CHILKATSOCKETLib.ChilkatSocketClass（）; 
 
  private   static  CHILKATSOCKETLib.ChilkatSocketClass objGas =  new  CHILKATSOCKETLib.ChilkatSocketClass（）; 
 
  private   static  CHILKATSOCKETLib.ChilkatSocketClass objHeatpump =  new  CHILKATSOCKETLib.ChilkatSocketClass（）; 
 
  private   static  CHILKATSOCKETLib.ChilkatSocketClass objSolar =  new  CHILKATSOCKETLib.ChilkatSocketClass（）; 
 
  ///  其他方法
  
 < span class =code-keyword> protected   string  TalkToAGVActiveXElectric（ string  lineCode， string  IP， int  port， int 模式，< span class =code-keyword> string 消息，字符串行， bool  isPollingForAGV） 
 {
  string  result =  ; 
 尝试 
 {
  if （mode ==  1 ）
 {
 RegisterAGVRecord（  SENT ，消息，行， false ）; 
  if （objEle！=  null ） / /  在此处使用静态对象 
 {
 result = objEle.IsConnected ==  1 ？   ON：  OFF; 
  if （result ==   ON ）
 {
  int  lnSuccess = objEle.SendString（message）; 
  if （lnSuccess！=  1 ）
 {
 .. ... 
 ..... 
} 
} 

解决方案

从不作为obj没有实现IDisposable。



如果你的意思是什么时候obj会收集垃圾，那么答案仍然永远不会 - 静态字段永远不会被垃圾收集，所以obj引用的对象如果将obj设置为null（或其他某个对象）并且没有对该对象的其他引用，则只有资格进行垃圾回收：



obj = null;

If I declare static object inside a class will they ever get garbage collected ? The class is accessed by a WCF service running as a windows service. Those are COM objects. Class is not static but objects are. Methods that are consuming those objects are non static methods defined inside this class.

namespace AGVController.BL
{
    public class AGV
    {

        private static CHILKATSOCKETLib.ChilkatSocketClass objEle = new CHILKATSOCKETLib.ChilkatSocketClass();

        private static CHILKATSOCKETLib.ChilkatSocketClass objGas = new CHILKATSOCKETLib.ChilkatSocketClass();

        private static CHILKATSOCKETLib.ChilkatSocketClass objHeatpump = new CHILKATSOCKETLib.ChilkatSocketClass();

        private static CHILKATSOCKETLib.ChilkatSocketClass objSolar = new CHILKATSOCKETLib.ChilkatSocketClass();

///Other methods 

 protected string TalkToAGVActiveXElectric(string lineCode, string IP, int port, int mode, string message, string line,bool isPollingForAGV)
        {
            string result = "";
            try
            {
                if (mode == 1)
                {
                    RegisterAGVRecord("SENT", message, line, false);
                    if (objEle != null) // using static object here 
                    {
                        result = objEle.IsConnected == 1 ? "ON" : "OFF";
                        if (result == "ON")
                        {
                            int lnSuccess = objEle.SendString(message);
                            if (lnSuccess != 1)
                            {
.....
.....
}
}

解决方案

Never, as obj does not implement IDisposable.

If you mean when will obj get garbage collected then the answer is still never - static fields are never garbage collected and so the object that obj references will only become eligible for garbage collection if you set obj to be null (or some other object) and have no other references to that object:

obj = null;

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