AJAX 上傳圖片

引用jquery Form 外掛程式，地址：http://jquery.malsup.com/form/

<script type="text/javascript">    $(function () {        $("#btn_show").bind("click", function () {            $("#form_upload").show();            var options = {                success: function (responseText, statusText, xhr, $form) {                    var picPath = responseText.message;                    if (picPath == "") {                        alert(responseText.message);                    }                    else {                        $("#form_upload").hide();                        alert(unescape(responseText.message.replace(/\\/g, "%")));                        //                        $("#result").attr("src", picPath).show();                    }                },                error: function (XMLHttpRequest, textStatus, errorThrown) {                    console.log(textStatus);                    console.log(errorThrown);                }            };            $("#form_upload").ajaxForm(options);        });    });</script>

　　

<input type="button" id="btn_show" value="上傳圖片" /><br />
<form id="form_upload" style="padding:20px;display:none" action="AddPic" method="post" enctype="multipart/form-data">
<input name="upImg" style="width:350px; height:25px;" size="38" type="file" />
<input type="submit" value="上傳"/>
</form>

 

後台C#代碼：

  [HttpPost]        public JsonResult AddPic(HttpPostedFileBase upImg)        {            string fileName = Path.GetFileName(upImg.FileName);            string filePhysicalPath = Server.MapPath("~/Upload/"+fileName);            string test = "\u56fe\u7247\u4ea0\u4f20\u6210\u529f";            string name = "", message = "";            byte[] bytes  = new byte[]{};            try            {                upImg.SaveAs(filePhysicalPath);                name = Path.GetFileName(fileName);                bytes = Encoding.Unicode.GetBytes("圖片添加成功");                for (int i = 0; i < bytes.Length; i+=2)                {                    message += "\\u" + bytes[i+1].ToString("x").PadLeft(2,'0')+bytes[i].ToString("x").PadRight(2,'0');                }            }            catch (Exception ex)            {                message = ex.Message;            }            return  Json(new {                name=name,                message = message            });        }

　　

 

後台把中文轉換成Unicode代碼，傳輸後JS指令碼將Unicode再轉換成中文，最終通過彈框顯示到瀏覽器中。