頁面代碼：
<body>
<div>
<% using (Html.BeginForm("Upload", "File", FormMethod.Post, new { enctype = "multipart/form-data" }))
{ %>
<div id="FileList">
<div>
<input type="file" id="file0" name="file0" />
</div>
</div>
<p>
<a onclick="AddFile();" style="color: Blue; text-decoration: underline">新增文件</a></p>
<p>
<input type="submit" value="上傳" /></p>
<%} %>
</div>
</body>
js代碼：（根據用戶自動生成上傳控件）
var index = 1;
function AddFile() {
var ul = document.getElementById("FileList");
var inputDiv = document.createElement("div");
inputDiv.setAttribute("Id", "div" + index);
var file = document.createElement("input");
file.setAttribute("type", "file");
file.setAttribute("id", "file" + index);
file.setAttribute("name", "file" + index);
var btnDel = document.createElement("input");
btnDel.setAttribute("type", "button");
btnDel.setAttribute("value", "刪除");
btnDel.setAttribute("Id", index);
btnDel.onclick = function() {
inputDiv.removeChild(file);
inputDiv.removeChild(btnDel);
ul.removeChild(inputDiv);
}
inputDiv.appendChild(file);
inputDiv.appendChild(btnDel);
ul.appendChild(inputDiv);
index++;
}
Controller的代碼：
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Upload()
{
foreach (string item in Request.Files)
{
HttpPostedFileBase file = Request.Files[item] as HttpPostedFileBase;
if (file==null&&file.ContentLength == 0)
continue;
//判斷Upload文件夾是否存在，不存在就創建
string path = Server.MapPath("..//Upload");
if (!System.IO.Directory.Exists(path))
{
System.IO.Directory.CreateDirectory(path);
}
path = AppDomain.CurrentDomain.BaseDirectory + "Upload/";
//獲取上傳的文件名
string fileName = Path.GetFileName(file.FileName);
//限制上傳文件的類型
if (Path.GetExtension(fileName)!=".doc")
{
return Content("<script>alert('只能上傳後綴名爲.doc的文件');</script>");
}
//上傳
file.SaveAs(Path.Combine(path,fileName));
}
return Content("<script>alert('上傳文件成功');window.history.back();</script>");
}