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In. NET programming, when we use an object that does not exist, the system will throw this exception: system. nullreferenceexception: the object reference is not set to the instance of the object. The following describes several common occasions:   1

The object reference is not set To the instance of the object in Linq To SQL. We encapsulate public void Delete (T entity) {db in DAL. getTable (). deleteOnSubmit (entity); db. submitChanges () ;}delete public void Delete (stuInfo StuInfo) {db.

This problem occurs when the initwithnibname function is used and the view attribute of viewcontroller generated by the NIB file is used. // Load LOC. XIB Uiviewcontroller * uivc = [[uiviewcontroller alloc] initwithnibname: @ "Loc" Bundle: Nil]; [

You have not set the object reference to the instance of the object. NullReferenceException, nullpointerexception not handled During the reconstruction of the data center, various problems were encountered, including the following: "The object is

When PHP uses post to transmit data, action = & quot; login. php? Id = 2 & quot;, click submit, $ _ POST [& quot; id & quot;] cannot be displayed, that is, it is not set! PHP sets action = "login. php? Id = 2 When PHP uses post to transmit data,

Ⅰ. Problems ariseDuring the National Day holiday----October 5-------------found ", by parsing the exception stack information, the code appears in the Qrcodeservice Getqrcode method as follows the 8th line of code:1 /// 2 ///Scan code payment to get

Https://www.jb51.net/article/105018.htmSettings in PHPPHP5.2 above has supported the setting of the HttpOnly parameter, also supports the setting of global HttpOnly, in

ORA-12557 The process of resolution ORA-12557: Tns:protocol Adapter Not loadable Cause: On some platforms (such as OS/2) protocol adapters are loadedat. If the shared library (or DLL) for the protocoladapter are

This problem is encountered when using the Initwithnibname function and using the View property of the Viewcontroller generated by the nib file.Load Loc.xibUiviewcontroller * UIVC = [[Uiviewcontroller alloc] initwithnibname:@ "loc" Bundle:nil];[Self.

Original: Resolve using DevExpress Development error: Object reference not set to an instance of an objectThere are always some situations when using devexpress. This time the colleague on his machine debugging the finished code sent over, but

When PHP uses post to transmit data, action & quot; login. php? Login. php ?, Click SUBMIT. $ _ POST [id] cannot be displayed, that is, it is not set! However, for example, when PHP uses post to transmit data, action = "login. php? Id = 2 ", click

When PHP uses post to transmit data, action & quot; login. php? Login. php ?, Click SUBMIT. $ _ POST [id] cannot be displayed, that is, it is not set! However, for example, when $ _ PHP uses post to transmit data, action = "login. php? Id = 2 ",

This problem occurs when the initwithnibname function is used and the view attribute of viewcontroller generated by the NIB file is used. // Load LOC. XIB Uiviewcontroller * uivc = [[uiviewcontroller alloc] initwithnibname: @ "Loc" Bundle: Nil];

Bootstrap class path not set in conjunction-Source 1.6 The bootstrap class path is not set with-source 1.6 org. Apache. Maven. plugins Maven-compiler-plugin 3.2 1.7 1.7 -xlint: All true true UTF-8 Set red to 1.7 The bootstrap class path

These days, unexpectedly met some wonderful problems, some really lazy write, this is more interesting, have not seen before, write an article record:Error Creating Control-"Object Reference not Set to an Instance of object"On the WinForms page, the

AutoMapper. Mapper. CreateMap reports "System. NullReferenceException: the object reference is not set to the instance of the object ." Recurrence of exceptions, Navigation: > I. problems during the National Day holiday > II. An exception occurs

When PHP uses post to transmit data, actionlogin. php ?, Click SUBMIT. $ _ POST [id] cannot be displayed, that is, it is not set! PHP Form action $ _ POST [] PHP sets action = "login. php? Id = 2 ", Click SUBMIT. $ _ POST ["id"] cannot be

Put the listview in scroll, and solve the problem that scroll Initialization is not set to the top, listviewscrollFirst, if you put listview in scroll, The listview is not displayed completely. In this case, you need to dynamically modify the length

Everyone said that it is necessary to set a goal to succeed, but Dr. vermeeren said that if you want to succeed, do not set a goal. What is he talking about? After reading it, you may understand it... Most of the time they set goals, they will

Introduction Today, due to a problem with the customer, the requirement changes and the code has to be modified. This problem occurs in the logs.Cause The ID is used to search for related information. The result shows whether the set contains null