Use of getJSON in asp.net in Jquery

Preparations
· Customer class

Copy codeThe Code is as follows:
Public class Customer
{
Public int Unid {get; set ;}
Public string CustomerName {get; set ;}
Public string Memo {get; set ;}
Public string Other {get; set ;}
}


(1) ashx

Copy codeThe Code is as follows:
Customer customer = new Customer
{Unid = 1, CustomerName = "", Memo = "Tian kuixing", Other = "sanlang "};
String strJson = Newtonsoft. Json. JsonConvert. SerializeObject (customer );
Context. Response. Write (strJson );

Copy codeThe Code is as follows:
Function GetCustomer_Ashx (){
$. GetJSON (
"Webdata/Json_1.ashx ",
Function (data ){
Var tt = "";
$. Each (data, function (k, v ){
Tt + = k + ":" + v + "<br/> ";
})
$ ("# Divmessage" 2.16.html (tt );
});
}

· Request data from ashx through getJSON. The returned data is a JSON object.
(2) The ashx file, but the returned object set
Copy codeThe Code is as follows:
Customer customer = new Customer
{Unid = 1, CustomerName = "", Memo = "Tian kuixing", Other = "sanlang "};
Customer customer2 = new Customer
{Unid = 2, CustomerName = "", Memo = "", Other = ""};
List <Customer> _ list = new List <Customer> ();
_ List. Add (customer );
_ List. Add (customer2 );
String strJson = Newtonsoft. Json. JsonConvert. SerializeObject (_ list );
Context. Response. Write (strJson );



Copy codeThe Code is as follows:
Function GetCustomerList (){
$. GetJSON (
"Webdata/Json_1.ashx ",
Function (data ){
Var tt = "";
$. Each (data, function (k, v ){
$. Each (v, function (kk, vv ){
Tt + = kk + ":" + vv + "<br/> ";
});
});
$ ("# Divmessage" 2.16.html (tt );
});
}

(3) request the aspx File
· Cs files
Copy codeThe Code is as follows:
Protected void Page_Load (object sender, EventArgs e)
{
Customer customer = new Customer
{Unid = 1, CustomerName = "", Memo = "Tian kuixing", Other = "sanlang "};
String strJson = Newtonsoft. Json. JsonConvert. SerializeObject (customer );
Response. Write (strJson );
}



· Aspx File
<% @ Page Language = "C #" AutoEventWireup = "true" CodeFile = "Json_1.aspx.cs"
Inherits = "webdata_Json_1" %>

The foreground file only retains the Page declaration, and all others are deleted.

· Js files

Copy codeThe Code is as follows:
Function GetCustomer_Aspx (){
$. GetJSON (
"Webdata/Json_1.aspx ",
Function (data ){
Var tt = "";
$. Each (data, function (k, v ){
Tt + = k + ":" + v + "<br/> ";
})
$ ("# Divmessage" 2.16.html (tt );
});
}

This part is the same as when requesting the ashx file.
The request object set is the same as that of ashx.
(4) Request text files
A text file provides a json string, which is a json object obtained by $. getJSON.
· Text files
{Unid: 1, CustomerName: "", Memo: "Tian kuixing", Other: ""}
Text files provide json strings. For the json format, see other documents. Empty rows and spaces are ignored for this entity json.

Copy codeThe Code is as follows:
Function GetCustomer_txt (){
$. GetJSON (
"Webdata/Json_1.txt ",
Function (data ){
Var tt = "";
$. Each (data, function (k, v ){
Tt + = k + ":" + v + "<br/> ";
})
$ ("# Divmessage" 2.16.html (tt );
});
}

The resolution method is the same as that of other methods.

For multiple rows:
Text:
Copy codeThe Code is as follows:
[
{Unid: 1, CustomerName: "", Memo: "Tian kuixing", Other: "sanlang "},
{Unid: 2, CustomerName: "", Memo: "Tianji Star", Other: ""}
]

Resolution:
Copy codeThe Code is as follows:

Function GetCustomer_TxtList (){
$. GetJSON (
"Webdata/Json_1.txt ",
Function (data ){
Var tt = "";
$. Each (data, function (k, v ){
$. Each (v, function (kk, vv ){
Tt + = kk + ":" + vv + "<br/> ";
});
});
$ ("# Divmessage" 2.16.html (tt );
});
}

Same as others.
(5) ajax request with Parameters
Take ashx as an example to request customers by Customer id.
· Ashx File
Copy codeThe Code is as follows:
If (context. Request ["iUnid"] = null)
Return;
Context. Response. ContentType = "text/plain ";
Customer customer = new Customer
{Unid = 1, CustomerName = "", Memo = "Tian kuixing", Other = "sanlang "};
Customer customer2 = new Customer
{Unid = 2, CustomerName = "", Memo = "", Other = ""};
List <Customer> _ list = new List <Customer> ();
_ List. Add (customer );
_ List. Add (customer2 );

Int iCustomerId = Convert. ToInt32 (context. Request ["iUnid"]);
Var cus = from q in _ list
Where q. Unid = iCustomerId
Select q;
String strJson = Newtonsoft. Json. JsonConvert. SerializeObject (cus );
Context. Response. Write (strJson );

· Ajax request

Copy codeThe Code is as follows:
Function GetCustomer_AshxWithPara (){
$. GetJSON (
"Webdata/Json_2.ashx ",
{IUnid: 1 },
Function (data ){
Var tt = "";
$. Each (data, function (k, v ){
$. Each (v, function (kk, vv ){
Tt + = kk + ":" + vv + "<br/> ";
});
});
$ ("# Divmessage" 2.16.html (tt );
});
}

The parameter is also in the k/v format. The returned request is displayed as follows: The returned result is from the list of customers on the server side.

In the jquery library, getJSON is actually called: Query. get (url, data, callback, "json ")
This is important.