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main.js
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main.js
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var db,
arrayKey = [],
openRequest,
lastCursor = 0,
flag = 0,
indexedDB = window.indexedDB || window.mozIndexedDB || window.msIndexedDB || window.webkitIndexedDB,
dbName = "person",
tableName = "testTable";
window.addEventListener("DOMContentLoaded", init, false);
// window.addEventListener("load", init, false);
function init(){
//打开或新建person数据库
openRequest = indexedDB.open(dbName);
//在新的数据库被创建或数据库的版本号被更改时触发
openRequest.onupgradeneeded = function(e){
console.log("running onupgradeneeded");
var thisDb = e.target.result;//IDBDatabase
console.log(thisDb.version);
//thisDb.objectStoreNames是一个object DOMStringList
//检查数据库里面是否有testTable这张表
if(!thisDb.objectStoreNames.contains(tableName)){
console.log("I need to create the objectstore");
//autoIncrement表示主键的类型,自增的话设为true
var objectStore = thisDb.createObjectStore(tableName, {keyPath:"phone"});//autoIncrement: true
objectStore.createIndex("name", "name", {unique : false});
//指定哪些字段是索引字段,unique为false表示字段不是唯一的
objectStore.createIndex("phone", "phone", {unique : false});
}
};
openRequest.onsuccess = function(e){
db = e.target.result;
console.log(db.version);
db.onversionchange = function(){
// alert("数据库在其他地方被修改,需要立即关闭");
db.close();
};
db.onerror = function(event){
// alert("Database error:"+event.target.errorCode);
console.dir(event.target);
};
//如果testTable已经建立
if(db.objectStoreNames.contains(tableName)){
console.log("contains table "+tableName);
//建立一个可读写的事务,因为对表的操作都要通过事务来完成
var transaction = db.transaction([tableName], "readwrite");
//整个事务都完成
transaction.oncomplete = function(event){
console.log("All done!");
};
//整个事务都失败
transaction.onerror = function(event){
console.dir(event);
};
//使用事务访问testTable,objectStore可以使事务访问特定的存储空间
var objectStore = transaction.objectStore(tableName);
//在存储空间上创建游标
objectStore.openCursor().onsuccess = function(event){
var cursor = event.target.result;//取得存储空间中的下一个对象
if(cursor){
console.log(cursor.key);
console.dir(cursor.value);
render({key:cursor.key,
name:cursor.value["name"],
phone:cursor.value["phone"],
address:cursor.value["address"]
});
cursor.continue();
lastCursor++;
}else{
console.log("Done width cursor");
}
};
objectStore.openCursor().onerror = function(event){
console.dir(event);
};
}
};
openRequest.onerror = function(e){
alert("数据建立请求错误:"+e.target.errorCode);
};
}
function render(opt){
var content = document.getElementById("content");
var ul = document.createElement("ul");
var sc = document.createElement("li");
ul.setAttribute("id", opt.key);
ul.setAttribute("data-phone", opt.phone);
sc.innerHTML = '<input type="button" value="删除" id=#'+opt.key+'>';
//为删除按钮添加一个id属性,便于后面的删除
for(var k in opt){
var li = document.createElement("li");
li.innerHTML = opt[k];
ul.appendChild(li);
}
ul.appendChild(sc);
content.appendChild(ul);
}
//使用事件委托为记录的删除按钮添加事件
document.querySelector("#content").addEventListener("click", function(event){
var target = event.target;
// alert(target.value);
if(target.value !== "删除"){
return;
}
if(confirm("确定删除?")){
deleteRecord(target.getAttribute("id"));
}
});
//传入一个id值将对应的记录删除
function deleteRecord(id){
var ul = document.getElementById(id.substring(1));
var transaction = db.transaction([tableName], "readwrite");
transaction.oncomplete = function(event){
console.log("transaction complete!");
};
transaction.onerror = function(event){
console.dir(event);
};
var objectStore = transaction.objectStore(tableName),
getRequest = objectStore.get(ul.getAttribute("data-phone"));//先查找有没有要删除的键值
getRequest.onsuccess = function(event){
var result = event.target.result;
console.log(result);
};
getRequest.onerror = function(event){
console.log("没有找到要删除的键值");
};
//删除指定键值的数据
ul.style.display = "none";
var request = objectStore.delete(ul.getAttribute("data-phone"));
request.onsuccess = function(e){
console.log("success delete record!");
};
request.onerror = function(e){
console.log("Error delete record:"+e);
};
}
//添加记录
document.querySelector("#add").addEventListener("click", function(){
var name = document.querySelector("#name").value,
phone = document.querySelector("#phone").value,
address = document.querySelector("#address").value,
person = {"name":name, "phone":phone, "address":address},
transaction = db.transaction([tableName], "readwrite");
if(name === "" || phone === ""){
alert("必须输入姓名和电话");
return;
}
transaction.oncomplete = function(event){
console.log("transaction complete");
document.querySelector("#name").value = "";
document.querySelector("#phone").value = "";
document.querySelector("#address").value = "";
// alert(lastCursor);
// alert(flag);
};
transaction.onerror = function(event){
console.dir(event);
};
var objectStore = transaction.objectStore(tableName);
var r = objectStore.add(person);
r.onerror = function(){
alert("添加了重复的电话");
document.querySelector("#phone").value = "";
document.querySelector("#phone").focus();
};
r.onsuccess = function(){
objectStore.openCursor().onsuccess = function(event){
var cursor = event.target.result;//取得存储空间的下一个对象
if(cursor){
// alert(cursor.key);
//用flag来标志新添加的项
if(flag === lastCursor){
render({key:cursor.key, name:name, phone:phone, address:address});
lastCursor++;
flag = 0;
}else{
flag++;
}
cursor.continue();
}
console.dir(person);
};
};
});
//删除DB
document.querySelector("#deleteDB").addEventListener("click", function(){
var deleteDB = indexedDB.deleteDatabase(dbName);
var content = document.querySelector("#content");
while(content.firstChild){
content.removeChild(content.firstChild);
}
deleteDB.onsuccess = function(event){
console.log("success delete database!");
};
deleteDB.onerror = function(event){
console.dir(event.target);
};
});
//查询
document.querySelector("#selectBtn").addEventListener("click", function(){
var curName = document.getElementById("selname").value;
var transaction = db.transaction([tableName], "readwrite");
if(curName === ""){
alert("请输入姓名");
}
transaction.oncomplete = function(event){
console.log("transaction complete");
};
transaction.onerror = function(event){
console.dir(event);
};
var objectStore = transaction.objectStore(tableName);
var boundKeyRange = IDBKeyRange.only(curName);
document.getElementById("content").innerHTML = "";//清空content
objectStore.index("name").openCursor(boundKeyRange).onsuccess = function(event){
var cursor = event.target.result;
if(!cursor){
return;
}
var rowDate = cursor.value;
console.log(rowDate);
render({key:cursor.key,
name:cursor.value["name"],
phone:cursor.value["phone"],
address:cursor.value["address"]
});
cursor.continue();
};
});
document.querySelector("#selectBtn1").addEventListener("click", function(){
var curName = document.getElementById("selphone").value;
var transaction = db.transaction([tableName], "readwrite");
if(curName === ""){
alert("请输入电话");
}
transaction.oncomplete = function(event){
console.log("transaction complete");
};
transaction.onerror = function(event){
console.dir(event);
};
var objectStore = transaction.objectStore(tableName);
var boundKeyRange = IDBKeyRange.only(curName);
document.getElementById("content").innerHTML = "";//清空content
objectStore.index("phone").openCursor(boundKeyRange).onsuccess = function(event){
var cursor = event.target.result;
if(!cursor){
return;
}
var rowDate = cursor.value;
console.log(rowDate);
render({key:cursor.key,
name:cursor.value["name"],
phone:cursor.value["phone"],
address:cursor.value["address"]
});
cursor.continue();
};
});