Accumulated [JS]-Ajax value transfer (Layer 3) Notes

Ajax value transfer (three layers ):

1. Write in front-end page js to obtain the page data, pass the value to. CS, and return the value to determine whether the page is successful.

Code:

 1   <  Script  Language  = "JavaScript"  >  2       VaR  Title  =  $ (  " # Tb1  "  ). Val ();  3       VaR  Contents  =  $ (  "  # Tb2  "  ). Val (); 4   $. Ajax ({  5   Type:  "  Post  "  ,  6   Datatype:  "  Josn  " ,  7   Data: {Jian: title, jian2: Contents },  8   Success:  Function  (Data ){  9               If  (Data. Result  =  " 0  "  {  10   Alert (  "  Failed to add  "  );  11   }  12               Else {  13   Alert (  "  Added  "  );  14   }  15   },  16   Error: Function  (Data ){  17   Alert (  "  Error  "  );  18   }  19   })  20  21   </  Script  > 

2. In the background. CS, the aim is to pass the data obtained from the foreground to BLL.

Code:

 1   Protected   Void Bt1_click ( Object  Sender, eventargs E)  2   {  3               String Title = context. request [ "  Jian " ]; //  These two statements store the values obtained in front-end Js.  4               String Conte = context. request [ "  Jian2  "  ];  5               Int Result = New Bll. articlesmanager. Add (title, content ); //  Transmits a value to BLL and returns it.  6 Response. Write ( "  {\ "Result \":\"  " + Result + "  \"}  "  ); Returns the obtained value.  7               //  "{" Key ":" value "}" is in this format. If not, it must be transferred.  8               //  "{\" Result \ ": \" "+ Result + "\"}"  9 }

3. Obtain the value in. CS in BLL and pass it to Dal.
Code:

1 Public Static IntAdd (StringTitle,StringContent)2 {3Return NewDal. articlesservice. Add (title, content );4}
 

4. Adding data in the dal is the same as normal,

Code:

 1   Public   Static   Int Add (String Title, String  Content)  2   {  3               String SQL = "  Insert into articles (title, contents) values (@ title, @ contents)  "  ;  4 Sqlparameter [] par = New  Sqlparameter [] {  5                  6                   //  New sqlparameter ("@ ID", articels. ID ),  7                   New Sqlparameter ( "  @ Title  "  , Title ),  8                   New Sqlparameter ( "  @ Contents  "  , Content)  9  };  10               Return  Dbhelper. adddeed (SQL, par );  11 }