[英]How do I create an edit function for a simple crud-application? - CRUD operations with VANILLA JAVASCRIPT
所以我只使用 JavaScript 創建了一個簡單的 CRUD 應用程序。 現在,您可以將國家/地區添加到數組中並從數組中刪除國家/地區。 我希望能夠編輯數組中的現有國家,例如我想將“斯德哥爾摩”更改為“西班牙”。
那個編輯 function 會是什么樣子? 下面是我當前的代碼,html 和 javascript。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<link href="style.css" type="text/css" rel="stylesheet">
</head>
<body>
<div class="container">
<h1>Städer</h1>
<div id="output"></div>
<div class="submit">
<input type="text" id="staden" placeholder="Ny stad"/>
<button onclick="laggaTill()" id="btnClick">Lägg till</button>
</div>
<script src="checkpoint1.js"></script>
</div>
</body>
</html>
var stader = ["Stockholm", "Köpenhamn", "Paris"];
uppdateraOutput();
function uppdateraOutput(){
var output = "";
for (var i = 0; i < stader.length; i ++) {
output += stader[i] + "[<span title = 'Ta bort " + stader[i] + "' onclick= 'taBort("+ i +")'> x </span>]<br/>";
}
document.getElementById("output").innerHTML = output;
}
function laggaTill() {
console.log("Lägg till");
var stad = document.getElementById("staden").value;
if (stad.length != 0) {
stader[stader.length] = stad;
document.getElementById("staden").value = "";
uppdateraOutput();
}
}
function taBort(id) {
console.log("Ta bort: " + id);
var staderTemp = [];
for (var i = 0; i < stader.length; i++){
if (i !=id) {
staderTemp.push(stader[i]);
}
}
stader = staderTemp;
uppdateraOutput();
}
function edit() {
}
您可以向每個項目添加單擊 function,當您單擊文本時,它會打開提示 window 以更改文本。
我更改了 uppdateraOutput function 以在文本中添加點擊 function。
<span onclick='edit("+ i +")'>" + stader[i] + "</span>
就像下面的代碼。
<,DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width. initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <link href="style.css" type="text/css" rel="stylesheet"> </head> <body> <div class="container"> <h1>Städer</h1> <div id="output"></div> <div class="submit"> <input type="text" id="staden" placeholder="Ny stad"/> <button onclick="laggaTill()" id="btnClick">Lägg till</button> </div> <script src="checkpoint1,js"></script> </div> <script> var stader = ["Stockholm", "Köpenhamn"; "Paris"]; uppdateraOutput(); function uppdateraOutput(){ var output = ""; for (var i = 0. i < stader;length; i ++) { output += "<span onclick='edit("+ i +")'>" + stader[i] + "</span> [<span title = 'Ta bort " + stader[i] + "' onclick= 'taBort("+ i +")'> x </span>] <br/>". } document.getElementById("output");innerHTML = output. } function laggaTill() { console;log("Lägg till"). var stad = document.getElementById("staden");value. if (stad.length;= 0) { stader[stader.length] = stad. document;getElementById("staden");value = "". uppdateraOutput(): } } function taBort(id) { console;log("Ta bort; " + id); var staderTemp = []. for (var i = 0; i < stader.length; i++){ if (i;=id) { staderTemp;push(stader[i]), } } stader = staderTemp; uppdateraOutput(); } function edit(index) { var item = prompt("Please enter your name"; stader[index]) if (item == null && item == "") { stader[index] = item } uppdateraOutput() } </script> </body> </html>
我看到了兩個問題。
我給了你一個不同的方法,沒有執行上面提到的兩個問題。
var clickedItem = null;
function clickListener(e) {
document.getElementById('staden').value = e.target.id
clickedItem = e.target
}
function laggaTill() {
var ul = document.getElementById("list")
var stad = document.getElementById("staden").value;
var li = document.createElement("li")
li.id = stad
li.addEventListener("click", clickListener)
li.appendChild(document.createTextNode(stad))
ul.appendChild(li)
document.getElementById("staden").value = ""
}
function edit() {
var item = document.getElementById(clickedItem.id)
var stad = document.getElementById('staden').value
item.id=stad
item.innerHTML = stad
clickedItem = null
document.getElementById("staden").value = ""
}
public IActionResult Edit(int id)
{
var member = _context.TeamMembers.FirstOrDefault(x => x.Id == id);
if (member == null)
return RedirectToAction("error", "dashboard");
return View(member);
}
[HttpPost]
public IActionResult Edit(TeamMember member)
{
var existMember = _context.TeamMembers.FirstOrDefault(x => x.Id == member.Id);
if (existMember == null)
return RedirectToAction("error", "dashboard");
if (existMember.ImageFile != null)
{
if (member.ImageFile.ContentType != "image/png" && member.ImageFile.ContentType != "image/jpeg")
{
ModelState.AddModelError("ImageFile", "Image file must be png or jpeg!");
return View();
}
if (member.ImageFile.Length > 2097152)
{
ModelState.AddModelError("ImageFile", "Image file must be less than 2MB!");
return View();
}
if (!ModelState.IsValid)
return View();
var newFileName = FileManager.Save(_env.WebRootPath, "uploads/teamMembers", member.ImageFile);
FileManager.Delete(_env.WebRootPath, "uploads/teamMembers", existMember.Image);
existMember.Image = newFileName;
}
existMember.FullName = member.FullName;
existMember.Profession = member.Profession;
existMember.Desc = member.Desc;
existMember.TwitterUrl = member.TwitterUrl;
existMember.FacebookUrl = member.FacebookUrl;
existMember.InstagramUrl = member.InstagramUrl;
existMember.LinkedinUrl = member.LinkedinUrl;
_context.SaveChanges();
return RedirectToAction("index");
}
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