搭建环境–
步骤1 :打开Visual Studio并创建ASP.Net应用程序(Web-> Visual Studio [版本]),将其命名为KOSetup
第2步:安装jQuery文件和knockout.js文件,然后创建名为Scripts的文件夹,并将这两个文件(jQuery和knockout.js)拖到Scripts文件夹中
步骤3 :创建.aspx页面,将其命名为LearnKO.aspx
步骤4 :创建.js页面,将其命名为LearnKO.js
步骤5 :打开“ LearnKO.js”文件并将jQuery文件和“ knockout.js”库文件拖到“ LearKO.js”
步骤6 :编写$(document).ready(函数(){});在LearnKO.js文件中。当我们的HTML文档对象模型已加载到浏览器中时,将触发document.ready函数。
创建淘汰赛应用程序–
步骤7 :在其中创建一个数据库和一个表(名为Student)。
步骤8 :创建ADO.NET实体数据模型(Visual C#->数据),将其命名为LearningKO.edmx,
单击添加->从数据库生成->选择在数据库中创建的表->取消选中最后一个选项,即将选定的存储过程和函数导入到实体模型中->将名称模型命名空间命名为LearningKOModel,我们将在解决方案中获取某些文件在上下文和tt文件中。
步骤9 :在.aspx.cs页中写入Methods(Code)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Services;
namespace Setup
{
public partial class LearnKO : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
[WebMethod]
public static Student[] FetchStudents()
{
Entities dbEntities = new Entities();
var data = (from item in dbEntities.Students orderby
item.StudentId select item).Take(5);
return data.ToArray();
}
[WebMethod]
public static string SaveStudent(Student[] data)
{
try
{
var dbContext = new Entities();
var studentList = from dbStududent in dbContext.Students
select dbStududent;
foreach (Student userDetails in data)
{
var student = new Student();
if (userDetails != null)
{
student.StudentId = userDetails.StudentId;
student.FirstName = userDetails.FirstName;
student.LastName = userDetails.LastName;
student.Address = userDetails.Address;
student.Age = userDetails.Age;
student.Gender = userDetails.Gender;
student.Batch = userDetails.Batch;
student.Class = userDetails.Class;
student.School = userDetails.School;
student.Domicile = userDetails.Domicile;
}
Student stud = (from st in studentList where
st.StudentId == student.StudentId select st).FirstOrDefault();
if (stud == null)
dbContext.Students.Add(student);
dbContext.SaveChanges();
}
return "Data saved to database!";
}
catch (Exception ex)
{
return "Error: " + ex.Message;
}
}
[WebMethod]
public static string DeleteStudent(Student data)
{
try
{
var dbContext = new Entities();
var student = dbContext.Students.FirstOrDefault
(userId => userId.StudentId == data.StudentId);
if (student != null)
{
dbContext.Students.Remove(student);
dbContext.SaveChanges();
}
return "Data deleted from database!";
}
catch (Exception ex)
{
return "Error: " + ex.Message;
}
}
[WebMethod]
public static string UpdateStudent(Student data)
{
try
{
var dbContext = new Entities();
var student = dbContext.Students.FirstOrDefault
(userId => userId.StudentId == data.StudentId);
if (student != null)
{
student.FirstName = data.FirstName;
student.LastName = data.LastName;
student.Address = data.Address;
student.Age = data.Age;
student.Gender = data.Gender;
student.Batch = data.Batch;
student.Class = data.Class;
student.School = data.School;
student.Domicile = data.Domicile;
dbContext.SaveChanges();
}
return "Data updated in database!";
}
catch (Exception ex)
{
return "Error: " + ex.Message;
}
}
}
}
步骤10 :在.aspx页中编写代码
<%@ Page Language="C#" AutoEventWireup="true"
CodeBehind="LearnKO.aspx.cs" Inherits="Setup.LearnKO" %>
Learning Knockout.js
步骤11 :在LearnKO.js页面中编写代码
///
///
function Student(data) {
this.StudentId = ko.observable(data.StudentId);
this.FirstName = ko.observable(data.FirstName);
this.LastName = ko.observable(data.LastName);
this.Age = ko.observable(data.Age);
this.Gender = ko.observable(data.Gender);
this.Batch = ko.observable(data.Batch);
this.Address = ko.observable(data.Address);
this.Class = ko.observable(data.Class);
this.School = ko.observable(data.School);
this.Domicile = ko.observable(data.Domicile);
}
function StudentViewModel() {
var self = this;
self.Domiciles = ko.observableArray(['Delhi', 'Outside Delhi']);
self.Genders = ko.observableArray(['Male', 'Female']);
self.Students = ko.observableArray([]);
self.StudentId = ko.observable();
self.FirstName = ko.observable();
self.LastName = ko.observable();
self.Age = ko.observable();
self.Batch = ko.observable();
self.Address = ko.observable();
self.Class = ko.observable();
self.School = ko.observable();
self.Domicile = ko.observable();
self.Gender = ko.observable();
self.AddStudent = function () {
self.Students.push(new Student({
StudentId: self.StudentId(),
FirstName: self.FirstName(),
LastName: self.LastName(),
Domicile: self.Domicile(),
Age: self.Age(),
Batch: self.Batch(),
Address: self.Address(),
Class: self.Class(),
School: self.School(),
Gender: self.Gender()
}));
self.StudentId(""),
self.FirstName(""),
self.LastName(""),
self.Domicile(""),
self.Age(""),
self.Batch(""),
self.Address(""),
self.Class(""),
self.School(""),
self.Gender("")
};
self.DeleteStudent = function (student) {
$.ajax({
type: "POST",
url: 'LearnKO.aspx/DeleteStudent',
data: ko.toJSON({ data: student }),
contentType: "application/json; charset=utf-8",
success: function (result) {
alert(result.d);
self.Students.remove(student)
},
error: function (err) {
alert(err.status + " - " + err.statusText);
}
});
};
self.SaveStudent = function () {
$.ajax({
type: "POST",
url: 'LearnKO.aspx/SaveStudent',
data: ko.toJSON({ data: self.Students }),
contentType: "application/json; charset=utf-8",
success: function (result) {
alert(result.d);
},
error: function (err) {
alert(err.status + " - " + err.statusText);
}
});
};
self.UpdateStudent = function (student) {
$.ajax({
type: "POST",
url: 'LearnKO.aspx/UpdateStudent',
data: ko.toJSON({ data: student }),
contentType: "application/json; charset=utf-8",
success: function(response) {
$(".errMsg ul").remove();
var myObject = eval('(' + response.d + ')');
if (myObject > 0) {
bindData();
$(".errMsg").append("- Data updated
successfully
");
}
else {
$(".errMsg").append("- Opppps something
went wrong.
");
}
$(".errMsg").show("slow");
clear();
},
error: function (response) {
alert(response.status + ' ' + response.statusText);
}
});
};
$.ajax({
type: "POST",
url: 'LearnKO.aspx/FetchStudents',
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (results) {
var students = $.map(results.d, function (item) {
return new Student(item)
});
self.Students(students);
},
error: function (err) {
alert(err.status + " - " + err.statusText);
}
});
}
$(document).ready(function () {
ko.applyBindings(new StudentViewModel());
});
步骤12 :按F5键运行应用程序