第一步：先引入jQuery與ajaxFileUpload外掛程式。注意先後順序，這個不用說了，所有的外掛程式都是這樣。
<script src="jquery-1.7.1.js" type="text/javascript"></script><script src="ajaxfileupload.js" type="text/javascript"></script>第二步：HTML代碼：
<body> <p><input type="file" id="file1" name="file" /></p> <input type="button" value="上傳" /> <p><img id="img1" alt="上傳成功啦" src="" /></p></body>第三步：JS代碼
<script src="jquery-1.7.1.js" type="text/javascript"></script> <script src="ajaxfileupload.js" type="text/javascript"></script> <script type="text/javascript"> $(function () { $(":button").click(function () { ajaxFileUpload(); }) }) function ajaxFileUpload() { $.ajaxFileUpload ( { url: '/upload.aspx', //用於檔案上傳的伺服器端請求地址 secureuri: false, //是否需要安全性通訊協定，一般設定為false fileElementId: 'file1', //檔案上傳域的ID dataType: 'json', //傳回值類型 一般設定為json success: function (data, status) //伺服器成功響應處理函數 { $("#img1").attr("src", data.imgurl); if (typeof (data.error) != 'undefined') { if (data.error != '') { alert(data.error); } else { alert(data.msg); } } }, error: function (data, status, e)//伺服器響應失敗處理函數 { alert(e); } } ) return false; } </script>第四步：後台頁面upload.aspx代碼：
protected void Page_Load(object sender, EventArgs e) { HttpFileCollection files = Request.Files; string msg = string.Empty; string error = string.Empty; string imgurl; if (files.Count > 0) { files[0].SaveAs(Server.MapPath("/") + System.IO.Path.GetFileName(files[0].FileName)); msg = " 成功! 檔案大小為:" + files[0].ContentLength; imgurl = "/" + files[0].FileName; string res = "{ error:'" + error + "', msg:'" + msg + "',imgurl:'" + imgurl + "'}"; Response.Write(res); Response.End(); } }來一個MVC版本的執行個體：
public class HomeController : Controller { public ActionResult Index() { return View(); } public ActionResult Upload() { HttpFileCollection hfc = System.Web.HttpContext.Current.Request.Files; string imgPath = ""; if (hfc.Count > 0) { imgPath = "/testUpload" + hfc[0].FileName; string PhysicalPath = Server.MapPath(imgPath); hfc[0].SaveAs(PhysicalPath); } return Content(imgPath); } }前端視圖，HTML與JS代碼，成功上傳後，返回圖片真真實位址並綁定到<img>的SRC地址
<html><head> <script src="/jquery-1.7.1.js" type="text/javascript"></script> <script src="/ajaxfileupload.js" type="text/javascript"></script> <script type="text/javascript"> $(function () { $(":button").click(function () { if ($("#file1").val().length > 0) { ajaxFileUpload(); } else { alert("請選擇圖片"); } }) }) function ajaxFileUpload() { $.ajaxFileUpload ( { url: '/Home/Upload', //用於檔案上傳的伺服器端請求地址 secureuri: false, //一般設定為false fileElementId: 'file1', //檔案上傳空間的id屬性 <input type="file" id="file" name="file" /> dataType: 'HTML', //傳回值類型 一般設定為json success: function (data, status) //伺服器成功響應處理函數 { alert(data); $("#img1").attr("src", data); if (typeof (data.error) != 'undefined') { if (data.error != '') { alert(data.error); } else { alert(data.msg); } } }, error: function (data, status, e)//伺服器響應失敗處理函數 { alert(e); } } ) return false; } </script></head><body> <p><input type="file" id="file1" name="file" /></p> <input type="button" value="上傳" /> <p><img id="img1" alt="上傳成功啦" src="" /></p></body></html>最後再來一個上傳圖片且附帶參數的執行個體：控制器代碼：
public class HomeController : Controller { public ActionResult Index() { return View(); } public ActionResult Upload() { NameValueCollection nvc = System.Web.HttpContext.Current.Request.Form; HttpFileCollection hfc = System.Web.HttpContext.Current.Request.Files; string imgPath = ""; if (hfc.Count > 0) { imgPath = "/testUpload" + hfc[0].FileName; string PhysicalPath = Server.MapPath(imgPath); hfc[0].SaveAs(PhysicalPath); } //注意要寫好後面的第二第三個參數 return Json(new { Id = nvc.Get("Id"), name = nvc.Get("name"), imgPath1 = imgPath },"text/html", JsonRequestBehavior.AllowGet); } }Index視圖代碼:
<html><head> <script src="/jquery-1.7.1.js" type="text/javascript"></script> <script src="/ajaxfileupload.js" type="text/javascript"></script> <script type="text/javascript"> $(function () { $(":button").click(function () { if ($("#file1").val().length > 0) { ajaxFileUpload(); } else { alert("請選擇圖片"); } }) }) function ajaxFileUpload() { $.ajaxFileUpload ( { url: '/Home/Upload', //用於檔案上傳的伺服器端請求地址 type: 'post', data: { Id: '123', name: 'lunis' }, //此參數非常嚴謹，寫錯一個引號都不行 secureuri: false, //一般設定為false fileElementId: 'file1', //檔案上傳空間的id屬性 <input type="file" id="file" name="file" /> dataType: 'json', //傳回值類型 一般設定為json success: function (data, status) //伺服器成功響應處理函數 { alert(data); $("#img1").attr("src", data.imgPath1); alert("你請求的Id是" + data.Id + " " + "你請求的名字是:" + data.name); if (typeof (data.error) != 'undefined') { if (data.error != '') { alert(data.error); } else { alert(data.msg); } } }, error: function (data, status, e)//伺服器響應失敗處理函數 { alert(e); } } ) return false; } </script></head><body> <p><input type="file" id="file1" name="file" /></p> <input type="button" value="上傳" /> <p><img id="img1" alt="上傳成功啦" src="" /></p></body></html>此執行個體在顯示出非同步上傳圖片的同時並彈出自訂傳輸的參數。
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
