ajax 提示正在保存文件名,使用jquery ajax模式窗体上传文件并保存文件名失败

我尝试上传文件然后将文件名保存到mysql，方法与upload & save file to mysql相同。

但我的问题仍然存在。错误消息为uploadedfile is undefined。

HTML：

JS Script(cms.js)：

dialog = $( "#flow" ).dialog({

buttons: {

"Update Data":function() {

var params=$('#flowlist').serialize();

$.ajax({

type:"post",

url:"doserver.php",

data:params,

cache :false,

async :false,

success : function() {

$('input').val("");

$('textarea').val("");

table.row('.selected').draw(false);

location.reload();

return this;

},

error : function() {

alert("Data failed to input.");

}

PHP代码(doserver.php)：

case 'updateflow':

/* catch variable parameter */

$idcar = mysqli_real_escape_string($dbc,$_POST['idcar']);

$file= mysqli_real_escape_string($dbc,$_POST['filenm']);

$target_path = "mom/";

$target_path = $target_path . basename( $_FILES['uploadedfile']['name']);

if(move_uploaded_file($_FILES['uploadedfile']['tmp_name'], $target_path))

{

echo "The file ". basename( $_FILES['uploadedfile']['name']). " has been uploaded";

/* UPDATE */

$sql ="UPDATE monitor SET Mom = '".$file."'";

$sql.=" WHERE id_car LIKE '".$idcar."'";

$res =mysqli_query($dbc,$sql) or die(_ERROR30.":".mysqli_error($dbc));

}

else { echo "There was an error uploading the file, please try again!"; }

break;

修改

添加enctype="multipart/form-data"

然后对ajax函数进行一些更改：

"Update Data":function() {

var formData = new FormData(this);

$.ajax({

type:"post",

url:"doserver.php",

processData:false,

contentType:false,

data:formData,

....

});

我没有错误，但idcar未更新且文件未上传。