Autocomplete Javascript自动完成与来自服务器C的动态数据#
我有一个javascript数组，我在每次搜索中都会更新该数组以用于自动完成。 数据从服务器返回，但自动完成功能无法正常工作 HTML:Autocomplete Javascript自动完成与来自服务器C的动态数据#,autocomplete,Autocomplete,我有一个javascript数组，我在每次搜索中都会更新该数组以用于自动完成。 数据从服务器返回，但自动完成功能无法正常工作 HTML: <input id="myInput" class="center-block" placeholder="Enter Text..." onkeyup="updateAutocomplete()" /> Javascript <script> funct
<input id="myInput" class="center-block" placeholder="Enter Text..." onkeyup="updateAutocomplete()" />
<script>
function autocomplete(inp) {
/*the autocomplete function takes two arguments,
the text field element and an array of possible autocompleted values:*/
var currentFocus;
/*execute a function when someone writes in the text field:*/
inp.addEventListener("input", function (e) {
var a, b, i, val = this.value;
/*close any already open lists of autocompleted values*/
closeAllLists();
if (!val) { return false; }
currentFocus = -1;
/*create a DIV element that will contain the items (values):*/
a = document.createElement("DIV");
a.setAttribute("id", this.id + "autocomplete-list");
a.setAttribute("class", "autocomplete-items");
/*append the DIV element as a child of the autocomplete container:*/
this.parentNode.appendChild(a);
/*for each item in the array...*/
for (i = 0; i < countries.length; i++) {
/*check if the item starts with the same letters as the text field value:*/
if (countries[i].substr(0, val.length).toUpperCase() == val.toUpperCase()) {
/*create a DIV element for each matching element:*/
b = document.createElement("DIV");
/*make the matching letters bold:*/
b.innerHTML = "<strong>" + countries[i].substr(0, val.length) + "</strong>";
b.innerHTML += countries[i].substr(val.length);
/*insert a input field that will hold the current array item's value:*/
b.innerHTML += "<input type='hidden' value='" + countries[i] + "'>";
/*execute a function when someone clicks on the item value (DIV element):*/
b.addEventListener("click", function (e) {
/*insert the value for the autocomplete text field:*/
inp.value = this.getElementsByTagName("input")[0].value;
/*close the list of autocompleted values,
(or any other open lists of autocompleted values:*/
closeAllLists();
});
a.appendChild(b);
}
}
});
/*execute a function presses a key on the keyboard:*/
inp.addEventListener("keydown", function (e) {
var x = document.getElementById(this.id + "autocomplete-list");
if (x) x = x.getElementsByTagName("div");
if (e.keyCode == 40) {
/*If the arrow DOWN key is pressed,
increase the currentFocus variable:*/
currentFocus++;
/*and and make the current item more visible:*/
addActive(x);
} else if (e.keyCode == 38) { //up
/*If the arrow UP key is pressed,
decrease the currentFocus variable:*/
currentFocus--;
/*and and make the current item more visible:*/
addActive(x);
} else if (e.keyCode == 13) {
/*If the ENTER key is pressed, prevent the form from being submitted,*/
e.preventDefault();
if (currentFocus > -1) {
/*and simulate a click on the "active" item:*/
if (x) x[currentFocus].click();
}
}
});
function addActive(x) {
/*a function to classify an item as "active":*/
if (!x) return false;
/*start by removing the "active" class on all items:*/
removeActive(x);
if (currentFocus >= x.length) currentFocus = 0;
if (currentFocus < 0) currentFocus = (x.length - 1);
/*add class "autocomplete-active":*/
x[currentFocus].classList.add("autocomplete-active");
}
function removeActive(x) {
/*a function to remove the "active" class from all autocomplete items:*/
for (var i = 0; i < x.length; i++) {
x[i].classList.remove("autocomplete-active");
}
}
function closeAllLists(elmnt) {
/*close all autocomplete lists in the document,
except the one passed as an argument:*/
var x = document.getElementsByClassName("autocomplete-items");
for (var i = 0; i < x.length; i++) {
if (elmnt != x[i] && elmnt != inp) {
x[i].parentNode.removeChild(x[i]);
}
}
}
/*execute a function when someone clicks in the document:*/
document.addEventListener("click", function (e) {
closeAllLists(e.target);
});
}
var countries = [];
autocomplete(document.getElementById("myInput"));
function updateAutocomplete() {
var part = document.getElementById("myInput").value;
if (part != "") {
$.ajax({
type: "POST",
url: "index.aspx/GetAutocomplete",
data: "{'part':'" + part + "'}",
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function (data) {
var returnedstring = data.d;
if (returnedstring == "ERR") {
}
else {
countries = returnedstring.split('|');
}
}
});
}
}
</script>
函数自动完成（inp）{
/*autocomplete函数接受两个参数，
文本字段元素和可能的自动完成值数组：*/
无功电流聚焦；
/*当有人在文本字段中写入时执行函数：*/
inp.addEventListener（“输入”，函数（e）{
var a，b，i，val=该值；
/*关闭所有已打开的自动完成值列表*/
closeAllList（）；
如果（！val）{返回false；}
currentFocus=-1；
/*创建将包含以下项（值）的DIV元素：*/
a=document.createElement（“DIV”）；
a、 setAttribute（“id”，this.id+“自动完成列表”）；
a、 setAttribute（“类”、“自动完成项”）；
/*将DIV元素作为自动完成容器的子元素追加：*/
this.parentNode.appendChild（a）；
/*对于数组中的每个项*/
对于（i=0；i”+国家[i].substr（0，val.length）+“”；
b、 innerHTML+=国家[i].substr（val.length）；
/*插入将保存当前数组项值的输入字段：*/
b、 innerHTML+=“”；
/*当有人单击项值（DIV元素）时执行函数：*/
b、 addEventListener（“单击”，函数（e）{
/*插入自动完成文本字段的值：*/
inp.value=this.getElementsByTagName（“输入”）[0].value；
/*关闭自动完成值的列表，
（或任何其他打开的自动完成值列表：*/
closeAllList（）；
});
a、 儿童（b）；
}
}
});
/*按键盘上的键执行功能：*/
inp.addEventListener（“向下键控”，函数（e）{
var x=document.getElementById（this.id+“自动完成列表”）；
如果（x）x=x.getElementsByTagName（“div”）；
如果（e.keyCode==40）{
/*如果按下向下箭头键，
增加currentFocus变量：*/
currentFocus++；
/*并使当前项目更加可见：*/
addActive（x）；
}如果（e.keyCode==38）{//up
/*如果按下向上箭头键，
减小currentFocus变量：*/
当前焦点--；
/*并使当前项目更加可见：*/
addActive（x）；
}否则如果（e.keyCode==13）{
/*如果按ENTER键，则阻止提交表单*/
e、 预防默认值（）；
如果（当前焦点>-1）{
/*并模拟单击“活动”项：*/
如果（x）x[currentFocus]。单击（）；
}
}
});
函数addActive（x）{
/*将项目分类为“活动”的函数：*/
如果（！x）返回false；
/*首先删除所有项目上的“活动”类：*/
清除活性（x）；
如果（currentFocus>=x.length）currentFocus=0；
如果（currentFocus<0）currentFocus=（x.length-1）；
/*添加类“自动完成活动”：*/
x[currentFocus].classList.add（“自动完成活动”）；
}
函数removeActive（x）{
/*从所有自动完成项中删除“活动”类的函数：*/
对于（变量i=0；i<script>
function autocomplete(inp) {
/*the autocomplete function takes two arguments,
the text field element and an array of possible autocompleted values:*/
var currentFocus;
/*execute a function when someone writes in the text field:*/
inp.addEventListener("input", function (e) {
var a, b, i, val = this.value;
/*close any already open lists of autocompleted values*/
closeAllLists();
if (!val) { return false; }
currentFocus = -1;
/*create a DIV element that will contain the items (values):*/
a = document.createElement("DIV");
a.setAttribute("id", this.id + "autocomplete-list");
a.setAttribute("class", "autocomplete-items");
/*append the DIV element as a child of the autocomplete container:*/
this.parentNode.appendChild(a);
/*for each item in the array...*/
for (i = 0; i < countries.length; i++) {
/*check if the item starts with the same letters as the text field value:*/
if (countries[i].substr(0, val.length).toUpperCase() == val.toUpperCase()) {
/*create a DIV element for each matching element:*/
b = document.createElement("DIV");
/*make the matching letters bold:*/
b.innerHTML = "<strong>" + countries[i].substr(0, val.length) + "</strong>";
b.innerHTML += countries[i].substr(val.length);
/*insert a input field that will hold the current array item's value:*/
b.innerHTML += "<input type='hidden' value='" + countries[i] + "'>";
/*execute a function when someone clicks on the item value (DIV element):*/
b.addEventListener("click", function (e) {
/*insert the value for the autocomplete text field:*/
inp.value = this.getElementsByTagName("input")[0].value;
/*close the list of autocompleted values,
(or any other open lists of autocompleted values:*/
closeAllLists();
});
a.appendChild(b);
}
}
});
/*execute a function presses a key on the keyboard:*/
inp.addEventListener("keydown", function (e) {
var x = document.getElementById(this.id + "autocomplete-list");
if (x) x = x.getElementsByTagName("div");
if (e.keyCode == 40) {
/*If the arrow DOWN key is pressed,
increase the currentFocus variable:*/
currentFocus++;
/*and and make the current item more visible:*/
addActive(x);
} else if (e.keyCode == 38) { //up
/*If the arrow UP key is pressed,
decrease the currentFocus variable:*/
currentFocus--;
/*and and make the current item more visible:*/
addActive(x);
} else if (e.keyCode == 13) {
/*If the ENTER key is pressed, prevent the form from being submitted,*/
e.preventDefault();
if (currentFocus > -1) {
/*and simulate a click on the "active" item:*/
if (x) x[currentFocus].click();
}
}
});
function addActive(x) {
/*a function to classify an item as "active":*/
if (!x) return false;
/*start by removing the "active" class on all items:*/
removeActive(x);
if (currentFocus >= x.length) currentFocus = 0;
if (currentFocus < 0) currentFocus = (x.length - 1);
/*add class "autocomplete-active":*/
x[currentFocus].classList.add("autocomplete-active");
}
function removeActive(x) {
/*a function to remove the "active" class from all autocomplete items:*/
for (var i = 0; i < x.length; i++) {
x[i].classList.remove("autocomplete-active");
}
}
function closeAllLists(elmnt) {
/*close all autocomplete lists in the document,
except the one passed as an argument:*/
var x = document.getElementsByClassName("autocomplete-items");
for (var i = 0; i < x.length; i++) {
if (elmnt != x[i] && elmnt != inp) {
x[i].parentNode.removeChild(x[i]);
}
}
}
/*execute a function when someone clicks in the document:*/
document.addEventListener("click", function (e) {
closeAllLists(e.target);
});
}
var countries = [];
autocomplete(document.getElementById("myInput"));
function updateAutocomplete() {
var part = document.getElementById("myInput").value;
if (part != "") {
$.ajax({
type: "POST",
url: "index.aspx/GetAutocomplete",
data: "{'part':'" + part + "'}",
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function (data) {
var returnedstring = data.d;
if (returnedstring == "ERR") {
}
else {
countries = returnedstring.split('|');
}
}
});
}
}
</script>