後臺代碼:
//可以獲取任何方式
string photoId = context.Request.Params["photoid"];
//POST方式傳參
string photoId = context.Request.Form["photoid"];
//GET方式傳參
string photoId = context.Request.QueryString["photoid"];
完整後臺代碼
ApiEditPhoto .ashx文件代碼如下
<%@ WebHandler Language="C#" Class="ApiEditPhoto" %>
using System;
using System.Web;
using MyBlog.BLL;
using Newtonsoft.Json.Linq;
using System.IO;
public class ApiEditPhoto : IHttpHandler
{
AlbumService albumService = new AlbumService();
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "application/json";
string photoId = context.Request.Params["photoid"];
string photoName = context.Request.Params["photoname"];
bool flag=albumService.updatePhoto(int.Parse(photoId),photoName);
JObject jo;
if(flag==true)
{
jo = new JObject(new JProperty("msg", "修改成功"));
}
else
{
jo = new JObject(new JProperty("msg", "修改失敗"));
}
context.Response.Write(jo);
}
public bool IsReusable
{
get
{
return false;
}
}
}
ApiGetPhoto.ashx文件代碼如下
<%@ WebHandler Language="C#" Class="ApiGetPhoto" %>
using System;
using System.Web;
using System.IO;
using System.Data;
using System.Text;
using Newtonsoft.Json;
using MyBlog.BLL;
using MyBlog.DAL;
using System.Collections.Generic;
using Newtonsoft.Json.Linq;
//獲得所有photo表的信息
public class ApiGetPhoto : IHttpHandler
{
AlbumService albumService = new AlbumService();
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "application/json";
string userid = "2";
List<photo> photoList = albumService.GetAllPhoto(int.Parse(userid));
string counts = photoList.Count.ToString();
//重點掌握json對象,注意引入Newtonsoft.Json.Linq和System.Collections.Generic
//注意layui中table返回數據的json格式如下,如果是自己獨有的json格式,需要在
//table.render中添加parseData字段,詳見官方文檔
JObject res = new JObject();
res.Add(new JProperty("code", 0));
res.Add(new JProperty("msg", ""));
res.Add(new JProperty("count", counts));
JArray photos = new JArray();
foreach (var item in photoList)
{
JObject p = new JObject();
p.Add(new JProperty("photoId", item.photoId));
p.Add(new JProperty("photoName", item.photoName));
p.Add(new JProperty("photoUrl", item.photoUrl));
p.Add(new JProperty("photoTime", item.photoTime));
photos.Add(p);
}
res.Add(new JProperty("data", photos));
context.Response.Write(res);
}
public bool IsReusable
{
get
{
return false;
}
}
}
ApiAddPhoto.ashx文件代碼如下
<%@ WebHandler Language="C#" Class="ApiAddPhoto" %>
using System;
using System.Web;
using System.IO;
using System.Data;
using System.Text;
using Newtonsoft.Json;
using MyBlog.BLL;
using Newtonsoft.Json.Linq;
public class ApiAddPhoto : IHttpHandler
{
AlbumService albumService=new AlbumService();
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "application/json";
string savePath = HttpContext.Current.Server.MapPath("../UploadFiles/");
if (!System.IO.Directory.Exists(savePath))
{
System.IO.Directory.CreateDirectory(savePath);
}
HttpFileCollection hfc = context.Request.Files;
if (hfc.Count > 0)
{
HttpPostedFile hpf = context.Request.Files[0];
if (hpf.ContentLength > 0)
{
string fileName = Path.GetFileName(hpf.FileName);
savePath = savePath + "\\" + fileName;
hpf.SaveAs(savePath);
string path = string.Format("UploadFiles/{0}", fileName);
//法一
//string json = "{\"fileName\":\"" + path + "\"}";
//JObject jo = (JObject)JsonConvert.DeserializeObject(json);
//法二
JObject jObject=new JObject(new JProperty("fileName",path)) ;
context.Response.Write(jObject);
//獲取當前時間
DateTime dateTime = DateTime.Now.ToLocalTime();
//插入數據庫
albumService.insertPhoto(2, fileName, path, dateTime);
}
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
ApiDeletePhoto.ashx文件代碼如下
<%@ WebHandler Language="C#" Class="ApiDeletePhoto" %>
using System;
using System.Web;
using MyBlog.BLL;
using Newtonsoft.Json.Linq;
using System.IO;
public class ApiDeletePhoto : IHttpHandler
{
AlbumService albumService = new AlbumService();
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "application/json";
string photoId = context.Request.Form["photoid"];
string url = albumService.delPhoto(int.Parse(photoId));
JObject jo;
if (url != null)
{//成功刪除圖片
string savePath = HttpContext.Current.Server.MapPath("../" + url);
File.Delete(savePath);
jo = new JObject(new JProperty("msg", "刪除成功"));
}
else
{
jo = new JObject(new JProperty("msg", "刪除失敗"));
}
context.Response.Write(jo);
}
public bool IsReusable
{
get
{
return false;
}
}
}
前臺完整代碼
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="MyAlbum.aspx.cs" Inherits="MyAlbum" %>
<!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>
<link href="Contents/css/layui.css" rel="stylesheet" />
</head>
<body>
<table class="layui-hide" id="photoTable" lay-filter="test"></table>
<script type="text/html" id="toolbarDemo">
<div class="layui-btn-container">
<button class="layui-btn layui-btn-sm" lay-event="getCheckData">獲取選中行數據</button>
<button class="layui-btn layui-btn-sm" lay-event="getCheckLength">獲取選中數目</button>
<button class="layui-btn layui-btn-sm" lay-event="isAll">驗證是否全選</button>
</div>
</script>
<script type="text/html" id="barDemo">
<a class="layui-btn layui-btn-xs" lay-event="edit">編輯</a>
<a class="layui-btn layui-btn-danger layui-btn-xs" lay-event="del">刪除</a>
</script>
<script src="Contents/layui.js"></script>
<script>
layui.use(['table', 'jquery'], function () {
var table = layui.table;
var $ = layui.jquery;
table.render({
elem: '#photoTable'
, url: '/Comm/ApiGetPhoto.ashx'
, toolbar: '#toolbarDemo' //開啓頭部工具欄,併爲其綁定左側模板,指向自定義工具欄模板選擇器
, defaultToolbar: ['filter', 'exports', 'print', { //自定義頭部工具欄右側圖標。如無需自定義,去除該參數即可
title: '提示'
, layEvent: 'LAYTABLE_TIPS'
, icon: 'layui-icon-tips'
}]
, title: '用戶數據表'
, cols: [[
{ type: 'checkbox', fixed: 'left' }
, { field: 'photoId', title: '照片ID', width: 120, fixed: 'left', unresize: true, sort: true }
, { field: 'photoName', title: '照片名', width: 120 }
, {
field: 'photoUrl', title: '照片地址', width: 200, templet: function (res) {
return '<em>' + res.photoUrl + '</em>'
}
}
, { field: 'photoTime', title: '上傳時間', width: 180 }
, { fixed: 'right', title: '操作', toolbar: '#barDemo', width: 150 }
]]
, page: true
});
//頭工具欄事件
table.on('toolbar(test)', function (obj) {
var checkStatus = table.checkStatus(obj.config.id);
switch (obj.event) {
case 'getCheckData':
var data = checkStatus.data;
layer.alert(JSON.stringify(data));
break;
case 'getCheckLength':
var data = checkStatus.data;
layer.msg('選中了:' + data.length + ' 個');
break;
case 'isAll':
layer.msg(checkStatus.isAll ? '全選' : '未全選');
break;
//自定義頭工具欄右側圖標 - 提示
case 'LAYTABLE_TIPS':
layer.alert('此表格是用於照片管理');
break;
};
});
//監聽行工具事件
table.on('tool(test)', function (obj) {
var data = obj.data;
//console.log(obj)
if (obj.event === 'del') {
layer.confirm('真的刪除行麼', function (index) {
$.ajax({
type: "post",
async: true,
url: "/Comm/ApiDeletePhoto.ashx",
data: { photoid: data.photoId },
success: function (res) {
console.log(res);
obj.del();
//關閉彈出層
layer.close(index);
}
})
});
} else if (obj.event === 'edit') {
layer.prompt({
formType: 2
, title: "編輯照片名"
, value: data.photoName
}, function (value, index) {
$.ajax({
type: "post",
async: true,
url: "/Comm/ApiEditPhoto.ashx",
data: { photoid: data.photoId, photoname: value },
success: function (res) {
console.log(res);
}
})
obj.update({
photoName: value
});
layer.close(index);
});
}
});
});
</script>
</body>
</html>
BLL層服務操作類AlbumService.cs代碼如下,MyBlogDataContext 爲linq to sql類,是由數據庫文件直接轉換而來
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MyBlog.DAL;
namespace MyBlog.BLL
{
public class AlbumService
{
MyBlogDataContext db = new MyBlogDataContext();
//插入圖片
public void insertPhoto(int _userId,string _photoName,string _photoUrl,DateTime _dateTime)
{
photo photoItem = new photo
{
userId = _userId,
photoName = _photoName,
photoUrl = _photoUrl,
photoTime=_dateTime
};
db.photo.InsertOnSubmit(photoItem);
db.SubmitChanges();
}
public List<photo> GetAllPhoto(int _userId)
{
List<photo> photoList = new List<photo>();
var x=from r in db.photo
where r.userId==_userId
select r ;
photoList = x.ToList();
return photoList;
}
public string delPhoto(int _photoId)
{
var x = from r in db.photo
where r.photoId == _photoId
select r;
string pUrl=null;
foreach (var item in x)
{
pUrl = item.photoUrl;
}
db.photo.DeleteAllOnSubmit(x);
db.SubmitChanges();
return pUrl;//返回被刪除圖片的url,從而在服務器上對該圖片進行刪除
}
public bool updatePhoto(int _photoId,string _photoName)
{
bool flag = false;
var x = from r in db.photo
where r.photoId == _photoId
select r;
if(x!=null)
{
foreach (var item in x)
{
item.photoName = _photoName;
flag = true;
}
}
db.SubmitChanges();
return flag;
}
}
}
效果圖如下