Use Jquery to implement editable tables and use AJAX to submit to the server to modify the data_jquery

$ (function() { // Equivalent to adding the onload event to the body tag in the page
$(".caname").click(function() { // Adding the click function to the tag with caname class in the page
var objTD = $(this);
var oldText = $.trim(objTD.text()); // Save the old category name
var input = $(""); // HTML code of the text box
objTD.html(input); // The content of the current td becomes the text box
// Set the text box The click event is invalid
input.click(function() {
return false;
});
// Set the style of the text box
input.css("border-width", "0px"); //The border is 0
input.height(objTD.height()); //The height of the text box is the height of the current td cell
input.width(objTD.width()) ; // The width is the width of the current td cell
input.css("font-size", "14px"); // The content text size of the text box is 14px
input.css("text-align ", "center"); // Center the text
input.trigger("focus").trigger("select"); // Select all
// When the text box loses focus, it changes back to text
input.blur(function() {
var newText = $(this).val(); // Modified name
var input_blur = $(this);
// As the old category The data submission operation is only performed when the name is different from the modified name
if (oldText != newText) {
// Get the ID (serial number) corresponding to the category name
var caid = $.trim (objTD.prev().text());
// AJAX asynchronously changes the database
var url = "../handler/ChangeCaName.ashx?caname=" encodeURI(encodeURI(newText)) "&caid= " caid "&t=" new Date().getTime();
$.get(url, function(data) {
if (data == "false") {
$("#test ").text("Category modification failed, please check whether the category name is duplicated!");
input_blur.trigger("focus").trigger("select"); // Select all text boxes
} else {
$("#test").text("");
objTD.html(newText);
}
});
} else {
// before and after The text is the same, turn the text box into a label
objTD.html(newText);
}
});
// Press a keyboard key in the text box
input.keydown( function(event) {
var jianzhi = event.keyCode;
var input_keydown = $(this);
switch (jianzhi) {
case 13: // Press the Enter key to change The resulting value is submitted to the database
// $("#test").text("The key value you pressed is: " jianzhi);
var newText = input_keydown.val(); // After modification The name of Serial number)
var caid = $.trim(objTD.prev().text());
// AJAX asynchronously changes the database
var url = "../handler/ChangeCaName.ashx?caname= " encodeURI(encodeURI(newText)) "&caid=" caid "&t=" new Date().getTime();
$.get(url, function(data) {
if (data == "false ") {
$("#test").text("Category modification failed, please check whether the category name is duplicated!");
input_keydown.trigger("focus").trigger("select"); // Select all text boxes
} else {
$("#test").text("");
objTD.html(newText);
}
});
} else {
// Make the text before and after the same, turn the text box into a label
objTD.html(newText);
}
break;
case 27: // Press Esc key to cancel the modification and change the text box into a label
$("#test").text("");
objTD.html(oldText);
break;
}
});
});
});

// Shield Enter key
$(document).keydown(function(event) {
switch (event.keyCode) {
case 13: return false;
}
});



Here is the general handler code ChangeCaName.ashx

using System.Web;
using BLL;
using Model;
public class ChangeCaName : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
string caid = context.Request.QueryString["caid"];
string caname = context.Server.UrlDecode(context.Request. QueryString["caname"]);
// Determine whether the category with the same name already exists in the database
if (new CategoryManager().IsExists(caname))
{
context.Response.Write(" false");
return;
}
// Change database category name
Category ca = new Category(caid, caname);
bool b = new CategoryManager().Update(ca );
if (b)
{
context.Response.Write("true");
}
else
{
context.Response.Write("false ");
}
}
public bool IsReusable
{
get
{
return false;
}
}
}