FormData對象用以將數據編譯成鍵值對,以便用XMLHttpRequest來發送數據。其主要用於發送表單數據,但亦可用於發送帶鍵數據(keyed data),而獨立於表單使用。html
經過 Ajax 向後臺發送文件(包括圖片)時,其參數類型屬於對象。能夠建立一個 FormData 對象,而後調用它的 append() 方法來添加字段。
例如:jquery
var formData = new FormData(); formData.append("username", "cedric"); formData.append("tel", 15866666666); //數字123456會被當即轉換成字符串 "15866666666" // HTML 文件類型input,由用戶選擇 formData.append("userfile", fileInputElement.files[0]);
<div class="form-group"> <label for="upload_crowd_name" class="col-sm-2 control-label">人羣名稱</label> <div class="col-sm-10"> <input type="text" class="form-control" id="upload_crowd_name" placeholder="請輸入人羣名稱"> </div> </div> <div class="form-group"> <label for="upload_crowd_desc" class="col-sm-2 control-label">人羣說明</label> <div class="col-sm-10"> <textarea class="form-control" id="upload_crowd_desc" cols="20" rows="5"></textarea> </div> </div> <div class="form-group"> <label for="crowd_file" class="col-sm-2 control-label">上傳文件</label> <div class="col-sm-10"> <input type="file" accept=".xlsx" id="crowd_file"> </div> </div>
$('.submit').click(function () { var crowd_name = $.trim($('#upload_crowd_name').val()); var crowd_desc = $.trim($('#upload_crowd_desc').val()); var crowd_file = $('#crowd_file')[0].files[0]; var formData = new FormData(); formData.append("crowd_file",$('#crowd_file')[0].files[0]); formData.append("crowd_name", crowd_name); formData.append("crowd_desc", crowd_desc); $.ajax({ url:'/upload/', dataType:'json', type:'POST', async: false, data: formData, processData : false, // 使數據不作處理 contentType : false, // 不要設置Content-Type請求頭 success: function(data){ console.log(data); if (data.status == 'ok') { alert('上傳成功!'); } }, error:function(response){ console.log(response); } }); })
https://developer.mozilla.org/zh-CN/docs/Web/API/FormData/Using_FormData_Objectsajax