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Explanation of byte alignment issues

is short, the third is char, and then combined to get the integer data. If the variable is in the natural alignment position, the data can be fetched once. Some systems have strict alignment requirements, such as SPARC systems, where an error occurs if an unaligned data is taken, as an example:Char Ch[8];Char *p = ch[1];int i = * (int *) p;The runtime will report segment error, and there will be no errors on the x86, just a decrease in efficiency.3. Correctly handle byte alignment for a standar

9-First App project

=(EditText) Findviewbyid (r.id.edtsex); Medtage=(EditText) Findviewbyid (r.id.edtage); MTXTR=(TextView) Findviewbyid (R.ID.TXTR); Mbtnok=(Button) Findviewbyid (R.id.btnok); Mbtnok.setonclicklistener (Btnokonclick); } PrivateView.onclicklistener Btnokonclick =NewView.onclicklistener () { Public voidOnClick (View v) {String strsex=Medtsex.gettext (). toString (); intIage=Integer.parseint (Medtage.gettext (). toString ()); String Strsug=getString (R.string.result); if(Strsex.equals ("Male")){

C + + character number encoding (Encode) and decoding (Decode)

{ theEnmmaxmsglength =1024x768, theEnmmaxnamelength = - About }; the the classmsg{ the intiage; + CharSzname[enmmaxnamelength]; - DoubleDscore; the Public:Bayi MSG () the { the - } -MSG (intAgeConst Char* Name,Doublescore): Iage (age), Dscore (score) the { the strcpy (szname,name); the } the Virtual~Msg () {} - Virtual intEncodeChar*buf) the { thesize_t offset =0; thememset (BUF,'0', enmmaxmsglength);94 ENCOD

Asp.net prevents SQL statement Injection

the web page is not enough to clarify is safe 5. Neglected post submitted information Many people strictly filter the tools conveyed on the url. It is a fault to ignore the tools used to deal with post. The tools used for post are especially double and simple to be injected, because the common fields have a lot of corner power. In asp.net, we strongly recommend parameter determination to implement SQL rather than SQL concatenation, because even if you filter hundreds of passwords Qi: SqlConnect

How to export DataGrid data to an Excel file and download it to the client)

. Now. millisecond). Next (10000). tostring () + ". CSV"; // saveThe path specified by DownLoadURL in Web. config. The file format is the current date + 4-digit random number.Filestream FS = new filestream (name, filemode. Create, fileaccess. Write );Streamwriter Sw = new streamwriter (FS, system. Text. encoding. getencoding ("gb2312 "));Sw. writeline ("automatic number, name, age ");Foreach (datarow DR in DT. Rows){Sw. writeline (Dr ["ID"] + "," + Dr ["vname"] + "," + Dr ["

[Paste] How to export data from the DataGrid to an Excel file and download it to the client

. configurationsettings. appsettings ["DownLoadURL"]. tostring () + datetime. today. tostring ("yyyymmdd") + new random (datetime. now. millisecond ). next (1, 10000 ). tostring () + ". CSV "; // save it to the Web. the path specified by DownLoadURL in config. The file format is the current date + 4-digit random number.Filestream FS = new filestream (name, filemode. Create, fileaccess. Write );Streamwriter Sw = new streamwriter (FS, system. Text. encoding. getencoding ("gb2312 "));Sw. writeline

SQL injection

errors.5. Ignore post submission informationMany people strictly filter the content transmitted on the url. It is not correct to ignore post content. post content is easier to be injected because there are many fields.In asp.net, we strongly recommend that you use parameters to implement SQL statements instead of SQL concatenation, because even if you filter hundreds of passwordsFor example:SqlConnection conn = new SqlConnection (System. Configuration. ConfigurationSettings. Deleettings ["

In Asp.net, we strongly recommend that you concatenate SQL statements instead of SQL statements using parameters.

In Asp.net, we strongly recommend that you use parameters to implement SQL statements instead of SQL concatenation, because even if you filter hundreds of passwordsFor example: Sqlconnection conn = new sqlconnection (system. configuration. configurationsettings. deleettings ["conn"]);Sqlcommand comm = new sqlcommand ("Update tb1 set vname = @ vname, iage = @ iage where id = @ ID", Conn );Sqlparameter parm1

[Reprint] How to export data from the DataGrid to an Excel file and download it to the client

"]. tostring () + datetime. today. tostring ("yyyymmdd") + new random (datetime. now. millisecond ). next (1, 10000 ). tostring () + ". CSV "; // save it to the Web. the path specified by DownLoadURL in config. The file format is the current date + 4-digit random number.Filestream FS = new filestream (name, filemode. Create, fileaccess. Write );Streamwriter Sw = new streamwriter (FS, system. Text. encoding. getencoding ("gb2312 "));Sw. writeline ("automatic number, name, age ");Foreach (datarow

How to export DataGrid data to an Excel file and download it to the client

"]. tostring () + datetime. today. tostring ("yyyymmdd") + new random (datetime. now. millisecond ). next (1, 10000 ). tostring () + ". CSV "; // save it to the Web. the path specified by DownLoadURL in config. The file format is the current date + 4-digit random number.Filestream FS = new filestream (name, filemode. Create, fileaccess. Write );Streamwriter Sw = new streamwriter (FS, system. Text. encoding. getencoding ("gb2312 "));Sw. writeline ("automatic number, name, age ");Foreach (datarow

Copy constructors and const member functions

Experimental reasonsDescribes how to use the const description to protect class data from accidental modification.Compiling the environmentVC6SP6 + win7x64Project downloadCopyconstruction_constmemberfunction.zipCopy constructor error caused by using non-const member function[CPP]View PlainCopy Class Cstudent { /// constant definition Public enum {Name_size_max = 64}; /// structure, copy construction, destructor Public Cstudent (); Cstudent (const char* pcname, size_t nId

Asp.net Ajax WebService development document [Reproduced]

object Create a new student class that contains three attributes: sname, ssex, and iage. Create the following method in the webservice1.cs file: ... Using system. Web. Script. Services; ... /// /// Return a single JSON object /// /// [Webmethod] [Scriptmethod (responseformat = responseformat. JSON)] Public student showinfo () { Return new student ("zww", "man", 26 ); } [Scriptmethod (responseformat = responseformat. JSON)] serializes the student o

Interaction between client and server implemented by GWT

. event. Dom. Client. clickevent;Import com. Google. GWT. event. Dom. Client. clickhandler;Import com. Google. GWT. User. Client. window;Import com. Google. GWT. User. Client. rpc. asynccallback;Import com. Google. GWT. User. Client. UI. Button;Import com. Google. GWT. User. Client. UI. rootpanel;Import com. Google. GWT. User. Client. UI. textbox; Public class personrpc implements entrypoint {Private Static final myserviceasync myservice = GWT. Create (myservice. Class );Public void onmoduleload

Best 11 PHP programming specifications and 11PHP programming specifications

specification. Php programming specifications There are many rules, so we have found a better one for you. Similar to other versions.Reference: wenku.baidu.com/..f.htmlPhp object-oriented programming code specification Class NameA) uppercase letters are used to separate words. Other letters are in lower case, that is, the camper format.B. Use uppercase letters for the first letter of the name.C. Do not use underscores ('_')D) it is best to use the upper-case letter I for the interface Interface

SQL: inserts data from one table into another table to eliminate duplicate data.

Now there are two tables to insert data in Table A into Table B. They all have three fields, and the fields in Table A do not have a primary key, and there are also repeated data fields, however, this field in Table B does not need to be repeated and must be unique. At this time, I thought of a simple and fast way to use the cursor to read data from one row and one row, insert the read data into a temporary table. In the temporary table, I set a self-increasing ID so that the duplicate can be el

Design pattern-Prototype mode (c + + implementation)

1#include 2#include string>3 4 using namespacestd;5 6 classCprototype7 {8 Public:9 Cprototype ()Ten { One A } -Cprototype (intiage): M_iage (iage) - { the - } - Virtualcprototype* Clone () =0; - + intM_iage; - }; + A classCconcreteprototypea: PublicCprototype at { - Public: -Cconcreteprototypea (intIage,Const stringstrName): Cprototype (iage), M_strname

PHP Learning Note 18 "constructors"

PHPclassperson{ Public $name; Public $age; //defines a constructor function space __construct construction method does not return a value, the object is automatically called Public function__construct ($iname,$iage){ $this->name=$iname;//$this: The nature can be understood as the address of the object (reference to the object) $this->age=$iage; } //constructor Method The second definit

SQL server2008 sort function

Sort functions: 1.row_number () over (ordered by Liename): A unique line number is given for each row, sorted by the field following order by Select Row_number () over (order by iname Desc) as ROWID, iname from test 2.Rank (): The field values are the same with the same ordinal number, and the ordinal number may be discontinuous, according to the field following the order by Select DISTINCT rank (iname desc) as ROWID, iname,iage from t

Use lostinet's contextboundmodel to implement pre-and post-condition checks

I have introduced XC # In a previous article. With XC #, you can easily insert pre-and post-condition checks on a method. The implementation of XC # Is to dynamically Add the corresponding code to the original code based on the specified attribute inserted during compilation. Lostinet contextboundmodel (CBM) is an AOP. net Framework, based on CBM, can easily implement pre-and post-condition checks similar to XC #, and has greater flexibility, because we can customize various inspection condition

Introduction to object-oriented in objective-C

: 123456789101112131415161718 // Convenient initialization method 1- (id) initWithName:(NSString *)sName iAge:(int)anAge{if(self = [super init]) {studentName = [sName copy];age = anAge;}returnself;}// Convenient initialization method 2- (id) initWithName:(NSString *)sName{if(self = [super init]) {studentName = [sName copy];}returnself;} ? ? Code Description: ? ? ? ? 1. The colon following the function name is followed by the paramete

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