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銆�   鍏稿瀷鐨勬爤鍐呭瓨浣跨敤鐨勪緥瀛愬氨鏄嚱鏁版爤锛屾瘡涓�涓嚱鏁拌璋冪敤鏃堕兘浼氳鍒嗛厤涓�鍧楀唴瀛橈紝杩欏潡鍐呭瓨琚О涓烘爤鍐呭瓨锛屼互鍏堣繘鍚庡嚭鐨勬柟寮忓瓨鍙栨暟鎹紝鍦ㄥ嚱鏁版墽琛岃繃绋嬩腑涓嶆柇寰�鍑芥暟鏍堜腑鍘嬪叆锛圥USH锛夋暟鎹紙鍊肩被鍨嬫暟鎹細int銆乫loat銆佸璞＄殑寮曠敤...锛夛紝鍑芥暟鎵ц瀹屽悗鍙堝皢鍑芥暟鏍堜腑鐨勬暟鎹�愪釜寮瑰嚭锛圥OP锛�,鐢变簬鏄互鎿嶄綔鏍堢殑褰㈠紡鏉ュ瓨鍙栵紝鎵�浠ヨ闂�熷害蹇��

銆�銆�鍫嗗唴瀛橈紝浠庡瓧闈㈡剰鎬濅笂鐞嗚В灏卞ソ鍍忔槸浠撳簱閲岄潰鍙互瀛樹竴鍫嗙牬鐑傦紝浣犺嫢鏄渶瑕佸瓨鐐逛粈涔堜笢瑗垮氨灏界寰�閲岄潰涓�鎵旓紝浠撳簱閲屾湁鐨勬槸绌洪棿銆備簨瀹炵‘瀹炰篃鏄姝わ紝鍫嗗唴瀛樹腑鍙互瀛樻斁澶ц鏍肩殑鏁版嵁锛堟瘮濡傚璞¤祫婧愶級锛岃繖浜涙暟鎹槸涓嶉�傚悎瀛樻斁鍦ㄦ爤涓殑锛屽洜涓烘爤绌洪棿鐨勫閲忔湁闄愶紝杩欏氨鏄�鍫嗗唴瀛樼浉瀵逛簬鏍堝唴瀛樼殑濂藉锛氬閲忓ぇ銆備絾鏄畠鐨勭己鐐逛篃鏄樉鑰屾槗瑙佺殑锛岄偅灏辨槸瀛樺彇鍫嗗唴瀛樼殑鏁版嵁鐩歌緝浜庡瓨鍙栨爤鍐呭瓨鏄潪甯告參鐨�锛岃瘯鎯充竴涓嬶紝璁╀綘鍦ㄤ粨搴撻噷鐨勪竴鍫嗙牬鐑傞噷鍘绘壘浣犳兂瑕佺殑涓滆タ鏄粈涔堟劅瑙夈��

銆� 锛堟爤鍐呭瓨姣斿爢鍐呭瓨璇︾粏鍙傝��:https://blog.csdn.net/boyxiaolong/article/details/8543676锛�

  

 

銆�銆�浠庡唴瀛�鍒嗛厤鏂瑰紡涓婄湅锛屽爢鍐呭瓨涓嶅悓浜庢爤鍐呭瓨锛屽嚱鏁版爤鏄湪姣忎竴涓嚱鏁拌鎵ц鐨勬椂鍊欒鑷姩鍒嗛厤骞朵笖鍑芥暟鎵ц瀹屾垚鍚庤嚜鍔ㄥ洖鏀讹紝鑰屽鏋滀綘鎯充娇鐢ㄥ爢鍐呭瓨锛屽氨寰楄嚜宸卞姩鎵嬩赴琛ｈ冻椋熴��

銆�   鎵�浠ヤ綘浼氱湅鍒癱璇█绋嬪簭鍛樹細杩欐牱鍘讳娇鐢ㄥ爢鍐呭瓨锛�

int *p = (int*)malloc(sizeof(int)); //鍦ㄥ爢鍐呭瓨涓敵璇蜂竴鍧楀瓧鑺傛暟涓篿nt瀛楄妭鏁扮殑鍫嗗唴瀛橈紝骞惰繑鍥炴寚鍚戣鍐呭瓨鍖哄煙鐨勬寚閽�
*p = 10; 
free(p); //閲婃斁鍫嗗唴瀛樿祫婧�

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Car* bmw = new Car(); //鍒涘缓涓�涓狢ar绫诲璞★紝鍦ㄥ爢鍐呭瓨涓瓨鏀惧璞℃暟鎹紝骞惰繑鍥炴寚鍚戝璞¤祫婧愮殑鎸囬拡
delete bmw; //閲婃斁鍫嗗唴瀛樿祫婧�

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銆�銆�Car bmw = new Car();

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銆�銆�c#绋嬪簭鍛樹技涔庡苟涓嶄负鎵�鍔紝鑸掕垝鏈嶆湇鍦伴潬鍦ㄦ瀛愪笂锛岀敤浣欏厜鐬熶簡c++绋嬪簭鍛樹竴鐪硷紝璇达細“涓嶇敤鎱岋紝涓嶇敤鎱岋紝杩欎釜瀵硅薄鍦ㄦ墭绠″爢涓婃斁鐨勫ソ濂界殑鍛紝涓嶇敤鎴戞搷蹇�”锛屼簬鏄紝c#绋嬪簭鍛樹究濞撳〒閬撴潵锛堝懠鍛煎ぇ鐫★級...

 

銆�銆�鍦�.NET鐨勪笘鐣岋紝浣跨敤new鍏抽敭瀛楀垱寤轰竴涓璞★紝棣栧厛瀵硅薄璧勬簮琚垎閰嶅湪鎵樼鍫嗕腑锛岀劧鍚巒ew浼氳繑鍥炰竴涓寚鍚戝爢涓婂璞＄殑寮曠敤锛岃�屼笉鏄湡姝ｇ殑瀵硅薄鏈韩銆傚鏋滃湪鏂规硶浣滅敤鍩熶腑灏嗗紩鐢ㄥ彉閲忓０鏄庝负鏈湴鍙橀噺锛岃繖涓紩鐢ㄥ彉閲忎繚瀛樺湪鏍堝唴锛屼互渚涘簲鐢ㄧ▼搴忎互鍚庝娇鐢ㄣ��

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銆�銆�Finalize()鐨勮皟鐢ㄥ皢锛堟渶缁堬級鍙戠敓鍦ㄤ竴娆�"鑷劧鐨�"鍨冨溇鍥炴敹鎴栫敤绋嬪簭閫氳繃GC.Collect()寮哄埗鍥炴敹鐨勮繃绋嬩腑锛屾墍浠ヨ繖鏍风湅鏉ワ紝缁堢粨鍣ㄦ柟娉曞氨鏄绫诲璞￠噴鏀惧唴閮ㄩ潪鎵樼璧勬簮鐨勫湴鏂广�俷ice,鐜板湪鎴戜滑鍙互鍍忚繖鏍锋潵缂栧啓娓呯悊闈炴墭绠¤祫婧愮殑浠ｇ爜:

        //鏁版嵁搴撲笂涓嬫枃绫�
        public class SqlDbContext
        {
            //...(鍏朵粬琚紩鐢ㄧ殑瀵硅薄瀹炰緥)

            //绫讳腑鍖呭惈鐨勯潪鎵樼璧勬簮锛堥渶瑕佽皟鐢� Dispose()鍑芥暟杩涜璧勬簮鐨勯噴鏀撅級
            SqlConnection sqlConnection = new SqlConnection("...");  

            ~SqlDbContext()
            {
                //杩欓噷娓呴櫎闈炴墭绠¤祫婧�
                this.sqlConnection.Dispose();
            }
            
        }    

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 銆�銆�浠庝互涓婄殑鍐呭鎴戜滑寰楃煡锛�閫氳繃Finalize()鏉ユ竻闄ら潪鎵樼璧勬簮鐨勬椂鏈哄彧鑳芥槸鍦�.NET瀵硅薄琚瀮鍦惧洖鏀剁殑杩囩▼涓紝鑰屼笖缁堢粨杩囩▼鏄竴涓秷鑰椾笉灏忕殑鍔ㄤ綔銆�

銆�銆�闂鍙堟潵浜�锛�寰堝闈炴墭绠¤祫婧愰兘闈炲父瀹濊吹锛堝鏁版嵁搴撳拰鏂囦欢鍙ユ焺锛夛紝鎵�浠ヨ繖浜涜祫婧愬簲璇ュ湪浣跨敤瀹屽悗灏藉揩鍦拌娓呴櫎锛岃�屼笉鑳戒緷闈犲瀮鍦惧洖鏀剁殑鍙戠敓锛岄偅涔堣繖浜涜祫婧愬簲璇ヤ互鎬庢牱鐨勫舰寮忚鏄剧ず鍦伴噴鏀惧憿锛�

 

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鏋勫缓鍙缃璞� — 闈炴墭绠¤祫婧愬鐞嗙浜屽紡

      闄や簡閲嶅啓 Finalize() 涔嬪锛岀被杩樺彲浠ュ疄鐜� IDisposable 鎺ュ彛锛屽畠瀹氫箟浜嗕竴涓悕涓� Dispose() 鐨勬柟娉曪細

    public interface IDisposable
    {
        void Dispose();
    }

 

銆�銆�瀹冪殑浣跨敤鏂规硶灏辨槸锛氬湪绫荤殑Dispose()鏂规硶涓紪鍐欓潪鎵樼璧勬簮鐨勯噴鏀剧殑浠ｇ爜锛岀▼搴忓憳鍙互鍦ㄨ繖涓璞′笉鍐嶉渶瑕佺殑鏃跺�欐墜鍔ㄨ皟鐢ㄥ璞＄殑Dispose()鏂规硶鏉ヨ揪鍒板強鏃堕噴鏀鹃潪鎵樼璧勬簮鐨勭洰鐨勩��

銆�   浜庢槸浣犲彲浠ュ儚杩欐牱鏉ョ紪鍐欑被锛�

        //鏁版嵁搴撲笂涓嬫枃绫�
        public class SqlDbContext:IDisposable
        {
            //...(鍏朵粬琚紩鐢ㄧ殑瀵硅薄瀹炰緥)

            //绫讳腑鍖呭惈鐨勯潪鎵樼璧勬簮锛堥渶瑕佽皟鐢� Dispose()鍑芥暟杩涜璧勬簮鐨勯噴鏀撅級
            SqlConnection sqlConnection = new SqlConnection("...");  

            public void Dispose()
            {
                //杩欓噷娓呴櫎闈炴墭绠¤祫婧�
                this.sqlConnection.Dispose();
            }
        }        

銆�   閲囩敤杩欑鏂瑰紡鏉ラ噴鏀鹃潪鎵樼璧勬簮鐨勭被琚О浣滀负鍙缃璞�銆�

銆�   鍦ㄨ繖閲岃繕瑕佽ˉ鍏呬竴鐐癸紝C#鎻愪緵浜嗕竴涓娉曠硸鏉ョ畝鍖栬皟鐢―ispose()鎿嶄綔锛屽涓嬶細

   SqlDbContext context = new SqlDbContext();

   try
   {
        //鍦ㄦ浣滅敤鍩熷唴浣跨敤SqlDbContext绫诲璞ontext
   }
   finally
   {
        //纭繚浣跨敤瀹屽悗璋冪敤Dispose()鏂规硶
        context.Dispose();
   }    

銆�銆� 涓婇潰杩欐浠ｇ爜绛夊悓浜庝笅闈㈣繖娈典唬鐮侊細

銆�銆�using (SqlDbContext context = new SqlDbContext())
銆�銆�{
        //鍦ㄦ浣滅敤鍩熷唴浣跨敤SqlDbContext绫诲璞ontext
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銆�銆�c++绋嬪簭鍛樿锛�“浣犺繖杩樹笉鏄鑷繁鎵嬪姩璋冪敤锛屽鏋滄垜蹇樿璋冪敤 Dispose() 閭ｅ矀涓嶆槸涓�鍒囬兘鐜╁畬锛�”

 銆�   c#绋嬪簭鍛樺喎绗戜竴澹帮紝“闈炰篃锛岄潪涔燂紝鎴戞潵浼犳巿浣犳渶鍚庝竴鎷涘惂锛�”

闈炴墭绠¤祫婧愭渶寮烘ā寮� — 鍙屽墤鍚堢挧

銆� 浜洪潪鍦ｈ搐锛屽鑳芥棤杩囥�傜▼搴忓憳涔熶細鏈夊け鎵嬬殑鏃跺�欙紝姣斿锛屽繕璁拌皟鐢� Dispose() 鏂规硶...

銆�銆�杩欎釜鏃跺�欏氨蹇呴』璁捐涓�涓竾鏃犱竴澶辩殑鏂规硶锛岃揪鍒颁竴涓洰鐨勶細灏辨槸涓嶇鏈夋病鏈夋墜鍔ㄨ皟鐢―ispose(),闈炴墭绠¤祫婧愭渶缁堥兘搴旇琚Ε濡ュ湴閲婃斁鎺夈�備负浜嗚В鍐宠繖涓棶棰橈紝鎴戜滑鍙互濡備笅鍘诲畾涔変竴涓彲澶勭疆瀵硅薄绫伙細

        //鏁版嵁搴撲笂涓嬫枃绫�
        public class SqlDbContext:IDisposable
        {
            //...(鍏朵粬琚紩鐢ㄧ殑瀵硅薄瀹炰緥)

            //绫讳腑鍖呭惈鐨勯潪鎵樼璧勬簮锛堥渶瑕佽皟鐢� Dispose()鍑芥暟杩涜璧勬簮鐨勯噴鏀撅級
            SqlConnection sqlConnection = new SqlConnection("...");  

            ~SqlDbContext()
            {
                //杩欓噷娓呴櫎闈炴墭绠¤祫婧�
                this.sqlConnection.Dispose();
            }

            public void Dispose()
            {
                //杩欓噷娓呴櫎闈炴墭绠¤祫婧�
                this.sqlConnection.Dispose();

                //璺宠繃缁堢粨杩囩▼
                GC.SuppressFinalize(this);
            }    

 

銆�銆�鍙互鐪嬪埌锛岃繖涓被涓嵆鏈夌粓缁撴柟娉曠殑閲嶅啓涔熸湁Dispose()鏂规硶锛岃繖鏍峰氨鑳戒繚璇侊細绋嬪簭鍛樿嫢蹇樿璋冪敤Dispose()鏂规硶閲婃斁闈炴墭绠¤祫婧愶紝閭ｄ箞瀵硅薄灏变細鍦ㄥ瀮鍦惧洖鏀剁殑杩囩▼涓皟鐢ㄧ粓缁撴柟娉曟潵閲婃斁闈炴墭绠¤祫婧愶紱鑻ョ▼搴忓憳璋冪敤浜咲ispose()鏂规硶锛岄偅涔� GC.SuppressFinalize(this) 浼氫繚璇佸湪鍨冨溇鍥炴敹杩囩▼涓笉鍐嶄細璋冪敤瀵硅薄鐨勭粓缁撴柟娉曪紝閬垮厤涓嶅繀瑕佺殑璧勬簮寮�閿�銆傚彲璋�“鍙屽墤鍚堢挧”锛屼繚涓囨棤涓�澶便��

 

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