vue元件系列2、拖放上傳
阿新 • • 發佈:2019-03-20
直接上原始碼,就是樣式不太好看,但是該有的功能都有啦
<template>
<div
class="pre_upload"
@drop="okdrop($event)"
@dragover="allowDrop($event)"
>
<div class="pre_leve_one"></div>
<div class="pre_leve_two">
<h4>請把檔案拖放到這裡來</h4>
<div
di="files_data"
class="pre_files_data"
v-show="show_tab"
>
<table class="pre_dataintable">
<thead>
<tr>
<th>序號</th>
<th>名稱</th>
<th>型別</th>
<th>Y/N</th>
<th>大小</th>
<th>進度</th>
<th>操作</th>
</tr>
</thead>
<tbody>
<tr
v-for="(item,index) in pre_flies"
:key="index"
>
<td>{{item.id}}</td>
<td
class="pre_tab_name"
v-on:mousemove="lookImage(item)"
v-on:mouseout="closeImage(item)"
>{{item.name}}</td>
<td>{{item.type}}</td>
<td>{{item.flag}}</td>
<td>{{item.size}} KB</td>
<td>{{item.up}}</td>
<td>
<button
class="pre_btn_canle"
@click="del_files(item.id)"
>取消上傳</button>
</td>
</tr>
</tbody>
</table>
<div>
<button
class="pre_btn_del_all"
@click="canle_all"
>全部取消</button>
<button
class="pre_btn_up"
@click="submit_files"
>上傳</button>
</div>
</div>
<!-- 使用畫布驗證上傳圖片轉換是否正確 -->
<!-- <p>畫布:</p>
<canvas
id="myCanvas"
width="500"
height="300"
style="border:1px solid #d3d3d3;background:#ffffff;"
>
Your browser does not support the HTML5 canvas tag.
</canvas>-->
<!-- 畫布驗證過程有非同步 還是img直接 -->
<div
class="pre_show_img"
v-show="show_img"
>
<img :src="imgsrc">
</div>
</div>
</div>
</template>
<script>
/*
名稱:拖放上傳元件
日期:2019-03-14
作者:hj
目標:
1、將拖放的檔名稱展示出來:拖放過來的有可能是一堆檔案和資料夾混合 當放置被拖資料時,會發生 drop 事件。
2、顯示上傳檔案的進度
3、最好可以支援預覽(只可以圖片預覽)
*/
import { base_encode } from "@/utils/base64.js";
import { GetShort } from "@/utils/localstore.js";
export default {
name: "pre_uploadfile2",
data() {
return {
pre_flies: [],
exist_data: [],
show_tab: false,
show_img:false,
imgsrc: ""
};
},
methods: {
okdrop: async function(ev) {
// 呼叫 preventDefault() 來避免瀏覽器對資料的預設處理(drop 事件的預設行為是以連結形式開啟)
ev.preventDefault();
// 通過 dataTransfer.getData("Text") 方法獲得被拖的資料。該方法將返回在 setData() 方法中設定為相同型別的任何資料。
// var data=ev.dataTransfer.getData("Text");
var back_data = [],
ok_data = [];
back_data = ev.dataTransfer.files; //獲取檔案
for (var i = 0; i < back_data.length; i++) {
var td = {};
td.id = i + 1;
td.name = back_data[i].name;
td.type = back_data[i].type;
// td.size=Math.round(Number(back_data[i].size)/1024);
td.size = (Number(back_data[i].size) / 1024).toFixed(0);
if (
String(td.type)
.toLowerCase()
.indexOf(".exe") > 0
) {
td.flag = "NO";
} else {
td.flag = "YES";
}
td.up = 0 + "%";
td.filedata = await this.convertFileToString(back_data[i]);
ok_data[i] = td;
}
var j = 0;
j = this.exist_data.length;
if (j > 0) {
for (var i = 0; i < ok_data.length; i++) {
this.exist_data[j] = ok_data[i];
j += 1;
}
// 如果是多次拖放,需要進行二次整理
var temp_d=[];
for(var i=0;i<this.exist_data.length;i++){
var temp_o={};
temp_o.id = i + 1;
temp_o.name = this.exist_data[i].name;
temp_o.type = this.exist_data[i].type;
temp_o.size = this.exist_data[i].size;
temp_o.flag = this.exist_data[i].flag;
temp_o.up = this.exist_data[i].up;
temp_o.filedata= this.exist_data[i].filedata;
temp_d[i]=temp_o;
}
this.pre_flies=temp_d;
} else {
this.exist_data = ok_data;
this.pre_flies = this.exist_data;
}
this.show_tab = true;
// var tf=document.getElementById("files_data");
// tf.target.appendChild(files);
},
allowDrop: function(ev) {
ev.preventDefault();
},
convertFileToString: function(tempfile) {
return new Promise(resolve => {
var tf = new FileReader();
tf.readAsDataURL(tempfile);
tf.onload = function() {
resolve(this.result);
};
});
},
submit_files: async function() {
this.exist_data = [];
for (var i = 0; i < this.pre_flies.length; i++) {
/*這塊應該還可以用vuex 封裝*/
var postdata = "";
postdata =
'{"action":"data_upfile_db","user_no":"' +
GetShort("userno") +
'","upfile_name":"' +
this.pre_flies[i].name +
'","upfile_type":"' +
this.pre_flies[i].type +
'","upfile_size":"' +
this.pre_flies[i].size +
'","upfile_data":"' +
this.pre_flies[i].filedata +
'"}';
postdata =
'{"method":"File_load","data":"' + base_encode(postdata) + '"}';
var tp = this.pre_flies[i];
await this.updatabyquere(postdata, tp);
}
},
updatabyquere: function(postdata, tp) {
this.$postfile(
"/Data_Back",
postdata,
res => {
var loaded = 0,
total = 0;
loaded = res.loaded;
total = res.total;
this.$nextTick(() => {
// console.log(tp);
tp.up = ((loaded / total) * 100).toFixed(2) + " %";
});
}
).then(res => {
try {
res = JSON.parse(res);
res = res.data;
if (res.status == 1) {
tp.up = "上傳成功";
} else {
tp.up = "上傳失敗";
}
} catch (ex) {
tp.up = "上傳失敗";
}
});
},
del_files: function(id) {
var data = [];
var j=0;
for (var i = 0; i < this.pre_flies.length; i++) {
if (this.pre_flies[i].id != id) {
data[j] = this.pre_flies[i];
j+=1;
}
}
this.pre_flies = data;
if (this.pre_flies.length == 0) {
this.show_tab = false;
}
},
canle_all: function() {
this.pre_flies = [];
this.exist_data = [];
this.show_tab = false;
},
lookImage:function(parm){
console.log('進來'+parm.name);
if (/\.(gif|jpg|jpeg|png|GIF|JPG|PNG|ico)$/.test(parm.name)) {
this.imgsrc=parm.filedata;
this.show_img=true;
}
},
closeImage:function(parm){
console.log('出去');
this.show_img=false;
}
}
};
</script>
<style scoped>
.pre_upload {
width: 100%;
min-height: 200px;
height: 100%;
background-color: azure;
text-align: center;
/* padding: 10px 20px 10px 20px; */
}
.pre_leve_one {
height: 5px;
}
.pre_leve_two {
/* padding: 5px; */
margin: 15px;
margin-top: 15px;
border: 1px solid #191970;
min-height: 200px;
height: auto;
}
.pre_files_data {
width: 100%;
min-height: 200px;
height: auto;
/* padding: 10px 20px 10px 20px; */
}
.pre_files_data > ul {
list-style: none;
}
.pre_files_data > ul > li {
border: 1px solid black;
}
.pre_files_data > ul > li > span {
margin-left: 5px;
}
.pre_dataintable {
margin-top: 15px;
border-collapse: collapse;
border: 1px solid #aaa;
width: 95%;
/* padding 沒有作用 */
/* padding: 0px 5px 10px 5px; */
position: relative;
left: 2%;
}
.pre_dataintable th {
vertical-align: baseline;
padding: 5px 15px 5px 6px;
background-color: #c1ffc1;
border: 1px solid #3f3f3f;
text-align: left;
color: #000000;
font-size: 16px;
font-weight: bolder;
}
.pre_dataintable td {
vertical-align: text-top;
padding: 6px 15px 6px 6px;
border: 1px solid #aaa;
}
.pre_dataintable tr:nth-child(odd) {
background-color: #f5f5f5;
}
.pre_dataintable tr:nth-child(even) {
background-color: #fff;
}
.pre_tab_name {
cursor: pointer;
}
.pre_tab_name:hover {
cursor: pointer;
background-color: #aaa;
}
/* 全部取消按鈕 */
.pre_btn_del_all {
color: crimson;
font-weight: bold;
font-size: 16px;
width: 100px;
height: 30px;
}
/* 上傳按鈕 */
.pre_btn_up {
color: chartreuse;
font-weight: bold;
font-size: 16px;
width: 100px;
height: 30px;
}
/* 刪除按鈕 */
.pre_btn_canle {
color: crimson;
font-weight: bold;
font-size: 16px;
width: 80px;
height: 25px;
}
.pre_show_img {
width: 400px;
height: 400px;
text-align: center;
margin-top: -40px;
/* background-color: #000000; */
}
.pre_show_img > img {
width: auto;
height: 100%;
}
</style>