js方法实现--上传文件功能

function createUploadForm(fileElementId, data, curFileList) {
    var id = new Date().getTime();
    var formId = \'jUploadForm\' + id; //给form添加一个独一无二的id
    var form = jQuery(\'<form  action="" method="POST" name="\' + formId + \'" id="\' + formId + \'" enctype="multipart/form-data" ></form>\'); //创建form元素
    if (data) {
        for (var i in data) {
            jQuery(\'<input type="hidden" name="\' + i + \'" value="\' + data[i] + \'" />\').appendTo(form);
        }
    }

    //set attributes
    jQuery(form).css(\'position\', \'absolute\'); //给动态form添加样式，使其浮动起来，
    jQuery(form).css(\'top\', \'-1200px\');
    jQuery(form).css(\'left\', \'-1200px\');
    jQuery(form).appendTo(\'body\'); //把动态form插入到body中

    var fd = new FormData($(\'#\' + formId)[0]);
    for (var i = 0; i < curFileList.length; ++i) {
        fd.append(\'file[]\', curFileList[i]);
    }
    return fd;
}


使用方法:
　　　　　　　　　 var fd = createUploadForm("file" + row, { entityName: entityName, entityId: id, userId: userId, listName: rowData.ListName }, curFileList);
                $.ajax({
                    url: ClientUrl + \'/UploadFile/Upload.html\',
                    type: "post",
                    data: fd,
                    dataType: "json",
                    processData: false,
                    contentType: false,
                    success: function (data) {
                        $(\'#trackRecordTable\').bootstrapTable(\'hideLoading\');
                        $(\'#trackRecordTable\').bootstrapTable(\'refresh\');
                        alert(data.msg);
                    },
                    error: function (data) {
                        $(\'#trackRecordTable\').bootstrapTable(\'hideLoading\');

                        var result = eval(\'(\' + data.responseText + \')\');
                        alert(result.msg);
                    }
                });