JQuery calls WebServices methods and 4 instances

You even add a backend page for each ajax request!
Are you even thinking, Nima, if you can directly call the methods in Class C # files, it will be nice ?! (Here, FishLi provides a framework. If you are interested, you can check it out)
However, you probably forgot that we are programmers and we are lazy. We want computers to do more things for us! (Install 13 here), but in fact, Microsoft and JQuery have helped us solve this small problem.

There are roughly the following types of calls:

I,Calls with no parameters or return values

Front-end JS Code:

Copy codeThe Code is as follows:
$ ("# Btn1"). click (function (){
$. Ajax ({
Type: "POST ",
ContentType: "application/json; charset = UTF-8 ",
Url: "CalledByJquery. asmx/HelloWorld ",
Data :"{}",
DataType: "json ",
Success: function (json) {alert (json. d );},
Error: function (error ){
Alert ("call error" + error. responseText );
}
});
});

Backend WebMethod code:

Copy codeThe Code is as follows:
[WebMethod]
Public string HelloWorld ()
{
Return "Hello World ";
}

Google debugging result:



Ii. Simple parameter simple return value call

Front-end JS Code:

Copy codeThe Code is as follows:
$ ("# Btn2"). click (function (){
$. Ajax ({
Type: "POST ",
ContentType: "application/json; charset = UTF-8 ",
Url: "CalledByJquery. asmx/SimpleReturns ",
Data: "{name: 'zhang san '}",
DataType: "json ",
Success: function (json) {alert (json. d );},
Error: function (error ){
Alert ("call error" + error. responseText );
}
});
});

Backend WebMethod code:

Copy codeThe Code is as follows:
[WebMethod]
Public string SimpleReturns (string name)
{
Return String. Format ("Your name is {0}", name );
}

Google debugging result:


3. Call complex return values of complex parameters
Front-end JS Code:
Copy codeThe Code is as follows:
$ ("# Btn3"). click (function (){
$. Ajax ({
Type: "POST ",
ContentType: "application/json; charset = UTF-8 ",
Url: "CalledByJquery. asmx/GetStudentList ",
Data: "{stu: {ID: '6', Name: 'ff '}}",
DataType: "json ",
Success: function (json) {alert (json. d );},
Error: function (error ){
Alert ("call error" + error. responseText );
}
});
});

Backend WebMethod:

Copy codeThe Code is as follows:
[WebMethod]
Public List <Student> GetStudentList (Student stu)
{
List <Student> studentList = new List <Student>
{
New Student {ID = 1, Name = "James "},
New Student {ID = 2, Name = ""}
};
// Put the entity from the client back into the return value
StudentList. Add (stu );
Return studentList;
}
Google debugging result:

Iv. WebMethod call for returning anonymous objects

Front-end JS Code:

Copy codeThe Code is as follows:
$ ("# Btn4"). click (function (){
$. Ajax ({
Type: "POST ",
ContentType: "application/json; charset = UTF-8 ",
Url: "CalledByJquery. asmx/ReturnNoNameClass ",
Data :"{}",
DataType: "json ",
Success: function (json) {alert (json. d );},
Error: function (error ){
Alert ("call error" + error. responseText );
}
});
});

Backend WebMethod code:

Copy codeThe Code is as follows:
[WebMethod]
Public object ReturnNoNameClass ()
{
Return new {ID = 1, Name = "James "};
}

Google debugging result:



Haha, do you think so easy here? Mom no longer needs to worry about my learning. In fact, many things are very simple, but no one tells us, however, we do not have this kind of requirement in actual development, which creates some obstacles for our development,
So how important is communication!