C#+aspx+ajaxfileupload 實現圖片上傳
阿新 • • 發佈:2019-02-06
Html 程式碼及呼叫方法:
<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> <title></title> </head> <body> <form id="form1" runat="server"> <div style="margin:0 auto;text-align:center;"> <p> <asp:Image ID="imgShow" runat="server" Width="120" Height="120" ImageUrl="~/assets/images/nophoto.gif"/> </p> <p> <input name="file" id="fUpLoad" type="file"/><input type="hidden" id="Hfurl" runat="server"/> <input type="hidden" id="hfStatus" runat="server"/></p> <p> <input type="button" value="上傳" id="iUpLoad"/> </p> </div> <script src="assets/js/jquery-1.8.2.min.js"></script> <script src="plugins/uploadify/ajaxfileupload.js"></script> <script type="text/javascript"> $(function () { $("#iUpLoad").click(function () { ajaxFileUpload(); }) }) function ajaxFileUpload() { $.ajaxFileUpload ( { url: 'UpLoadHeadImg.aspx?random=' + Math.random(), //用於檔案上傳的伺服器端請求地址 //secureuri: false, //一般設定為false fileElementId: 'fUpLoad', //檔案上傳空間的id屬性 <input type="file" id="file" name="file" /> dataType: 'json', //返回值型別 一般設定為json success: function (data, status) //伺服器成功響應處理函式 { alert(data); $("#imgShow").attr("src", data.imgurl); $("#Hfurl").val(data.imgurl); //alert($("#hfDel").val()); 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式 { alert(e); } } ) return false; } </script> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /> </form> </body> </html>
後臺程式碼:
protected void Page_Load(object sender, EventArgs e) { log4net.ILog log = log4net.LogManager.GetLogger(this.GetType().Name); int count = Request.Files.Count; string res = string.Empty; string error = string.Empty; string imgurl = string.Empty; ; if (count > 0) { try { HttpPostedFile File1 = Request.Files[0]; string suffix = Path.GetExtension(File1.FileName).ToLower(); string path = Server.MapPath("UpLoadImg/HeadImage"); //用來生成資料夾 if (File1.ContentLength / 4096 > 4096) { error = "單張頭像不能超過4096K(4M),請重新選擇頭像上傳。"; } else { if (!Directory.Exists(path)) Directory.CreateDirectory(path); var savepath = "UpLoadImg/HeadImage/" + Guid.NewGuid() + suffix; if (suffix.Equals(".jpg") || suffix.Equals(".png") || suffix.Equals(".gif") || suffix.Equals(".jpeg")) { File1.SaveAs(Server.MapPath(savepath)); } imgShow.ImageUrl = savepath; imgurl = savepath; hfStatus.Value = "1"; Hfurl.Value = savepath; error = "上傳成功"; res = "{\"info\":\"" + error + "\",\"data\":\"1\",\"imgurl\":\"" + savepath + "\"}"; } if (HttpContext.Current.Request.Cookies["UserLogin"] != null) { log.Info(new LogContent(SearchDataClass.GetIPAddress(), HttpContext.Current.Request.Cookies["UserLogin"]["ClientName"], "上傳頭像圖片資訊", "上傳圖片為" + File1.FileName + "的圖片路徑" + imgurl + "成功,資訊為。" + res)); } else { log.Info(new LogContent(SearchDataClass.GetIPAddress(), "system", "上傳頭像圖片資訊", "上傳圖片為" + File1.FileName + "的圖片路徑" + imgurl + "成功,資訊為。" + res)); } } catch (Exception ex) { hfStatus.Value = "0"; res = "{\"info\":\"" + ex.Message + "\",\"data\":\"0\",\"imgurl\":\"\"}"; if (HttpContext.Current.Request.Cookies["UserLogin"] != null) { log.Fatal(new LogContent(SearchDataClass.GetIPAddress(), HttpContext.Current.Request.Cookies["UserLogin"]["ClientName"], "上傳頭像圖片資訊", res)); } else { log.Fatal(new LogContent(SearchDataClass.GetIPAddress(), "system", "上傳頭像圖片資訊", res)); } } Response.Write(res); Response.End(); } else { if (HttpContext.Current.Request.Cookies["UserLogin"] != null) { log.Warn(new LogContent(SearchDataClass.GetIPAddress(), HttpContext.Current.Request.Cookies["UserLogin"]["ClientName"], "上傳頭像圖片資訊", "無上傳頭像圖片資訊。")); } else { log.Warn(new LogContent(SearchDataClass.GetIPAddress(), "system", "上傳頭像圖片資訊", "無上傳頭像圖片資訊。")); } } }
由於上傳會出現錯誤,因此修改ajaxfileupload.js
jQuery.extend({ createUploadIframe: function (id, uri) { //create frame var frameId = 'jUploadFrame' + id; var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId + '" style="position:absolute; top:-9999px; left:-9999px"'; if (window.ActiveXObject) { if (typeof uri == 'boolean') { iframeHtml += ' src="' + 'javascript:false' + '"'; } else if (typeof uri == 'string') { iframeHtml += ' src="' + uri + '"'; } } iframeHtml += ' />'; jQuery(iframeHtml).appendTo(document.body); return jQuery('#' + frameId).get(0); }, createUploadForm: function (id, fileElementId) { //create form var formId = 'jUploadForm' + id; var fileId = 'jUploadFile' + id; var form = jQuery('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>'); var oldElement = jQuery('#' + fileElementId); var newElement = jQuery(oldElement).clone(); jQuery(oldElement).attr('id', fileId); jQuery(oldElement).before(newElement); jQuery(oldElement).appendTo(form); //set attributes jQuery(form).css('position', 'absolute'); jQuery(form).css('top', '-1200px'); jQuery(form).css('left', '-1200px'); jQuery(form).appendTo('body'); return form; }, ajaxFileUpload: function (s) { // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout s = jQuery.extend({}, jQuery.ajaxSettings, s); var id = new Date().getTime(); var form = jQuery.createUploadForm(id, s.fileElementId); var io = jQuery.createUploadIframe(id, s.secureuri); var frameId = 'jUploadFrame' + id; var formId = 'jUploadForm' + id; // Watch for a new set of requests if (s.global && !jQuery.active++) { jQuery.event.trigger("ajaxStart"); } var requestDone = false; // Create the request object var xml = {}; if (s.global) jQuery.event.trigger("ajaxSend", [xml, s]); // Wait for a response to come back var uploadCallback = function (isTimeout) { var io = document.getElementById(frameId); try { if (io.contentWindow) { xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null; xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document; } else if (io.contentDocument) { xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null; xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document; } } catch (e) { jQuery.handleError(s, xml, null, e); } if (xml || isTimeout == "timeout") { requestDone = true; var status; try { status = isTimeout != "timeout" ? "success" : "error"; // Make sure that the request was successful or notmodified if (status != "error") { // process the data (runs the xml through httpData regardless of callback) var data = jQuery.uploadHttpData(xml, s.dataType); // If a local callback was specified, fire it and pass it the data if (s.success) s.success(data, status); // Fire the global callback if (s.global) jQuery.event.trigger("ajaxSuccess", [xml, s]); } else jQuery.handleError(s, xml, status); } catch (e) { status = "error"; jQuery.handleError(s, xml, status, e); } // The request was completed if (s.global) jQuery.event.trigger("ajaxComplete", [xml, s]); // Handle the global AJAX counter if (s.global && ! --jQuery.active) jQuery.event.trigger("ajaxStop"); // Process result if (s.complete) s.complete(xml, status); jQuery(io).unbind(); setTimeout(function () { try { jQuery(io).remove(); jQuery(form).remove(); } catch (e) { jQuery.handleError(s, xml, null, e); } }, 100); xml = null; } }; // Timeout checker if (s.timeout > 0) { setTimeout(function () { // Check to see if the request is still happening if (!requestDone) uploadCallback("timeout"); }, s.timeout); } try { var form = jQuery('#' + formId); jQuery(form).attr('action', s.url); jQuery(form).attr('method', 'POST'); jQuery(form).attr('target', frameId); if (form.encoding) { jQuery(form).attr('encoding', 'multipart/form-data'); } else { jQuery(form).attr('enctype', 'multipart/form-data'); } jQuery(form).submit(); } catch (e) { jQuery.handleError(s, xml, null, e); } jQuery('#' + frameId).load(uploadCallback); return { abort: function () { } }; }, // handleError 方法在jquery1.4.2之後移除了,此處重寫改方法 handleError: function (s, xhr, status, e) { // If a local callback was specified, fire it if (s.error) { s.error.call(s.context || s, xhr, status, e); } // Fire the global callback if (s.global) { (s.context ? jQuery(s.context) : jQuery.event).trigger("ajaxError", [xhr, s, e]); } }, uploadHttpData: function (r, type) { var data = !type; data = type == "xml" || data ? r.responseXML : r.responseText; //20161018 add 帶有<pre>標籤 ////var reg = /<pre.+?>(.+)<\/pre>/g; ////var result = data.match(reg); ////result = RegExp.$1; //// data = $.parseJSON(result); // If the type is "script", eval it in global context if (type == "script") jQuery.globalEval(data); // Get the JavaScript object, if JSON is used. if (type == "json") { eval("data = " + data); } // evaluate scripts within html if (type == "html") jQuery("<div>").html(data).evalScripts(); return data; } });