.net5 core Razor项目实战系列之六：部门管理功能的实现（新增和修改功能）

@page
@model AuthManagement.Pages.Auth.DeptListModel
@using AuthManagement.DbUtil.Entity
@{
    ViewData["Title"] = "部门管理";
}

<table border="1" width="60%">
    <tr style="background-color:antiquewhite;height:40px;">
        <td>编号</td>
        <td>名称</td>
        <td>创建时间</td>
        <td><a href="/Auth/DeptEdit?deptid=0" target="_blank">新增部门</a></td>
    </tr>
    @foreach (TDept item in Model.DeptList) //遍历输出部门信息
    {
    <tr style="height:30px;">
        <td>@item.DeptId</td>
        <td>@item.DeptName</td>
        <td>@item.CreateTime</td>
        <td>
            <a href="/Auth/DeptEdit?deptid=@item.DeptId" target="_blank">修改</a>&nbsp;&nbsp;&nbsp;
            <a href="/Auth/DeptList?deptid=@item.DeptId" target="_self" onclick="return confirm(‘确定要作废吗？‘);">作废</a>        
        </td>
    </tr>
    }
    @if (Model.DeptList.Count == 0)
    {
        <tr style="height:30px;">
            <td colspan="4" align="center">没有查询到部门数据！</td>
        </tr>
    }
</table>

@page
@model AuthManagement.Pages.Auth.DeptEditModel
@{
    Layout = null; //这里不需要使用布局页，设为null就可以了
}

<form method="post">

    <table style="width:400px;border-collapse: collapse;border: solid 1px #c0c0c0;">
        <tr style="background-color:antiquewhite;height:40px;">
            <td>&nbsp; @Model.SubjectName</td>
        </tr>
        <tr style="height:30px;border:solid 1px #c0c0c0;"> 
            <td style="font-size:15px;">
                &nbsp;&nbsp;&nbsp; 部门名称：
                <input type="text" style="font-size:15px;" size="25" maxlength="10" name="deptname" value="@Model.DeptName" />
            </td>
        </tr>
        <tr style="height:30px;border:solid 1px #c0c0c0;">
            <td align="center">
                <button type="submit">保存</button>&nbsp;&nbsp;&nbsp;
                <button onclick="javascript: window.close();">关闭</button>
            </td>
        </tr>
    </table>

</form>

namespace AuthManagement.Pages.Auth
{
    public class DeptEditModel : PageModel
    {
        private readonly AuthDbContext _context;

        //构造函数中对AuthDbContext做依赖注入
        public DeptEditModel(AuthDbContext context)
        {
            _context = context;
        }

        public string SubjectName { get; set; }
        public string DeptName { get; set; }

        public void OnGet()
        {
            SubjectName = "新增部门";
            DeptName = "";
            string deptId = Request.Query["deptid"];
            if (int.TryParse(deptId, out int did))
            {
                if (did > 0) 
                { 
                    SubjectName = "修改部门";
                    //如果是修改要初始化部门名称
                    TDept dept = _context.TDepts.Find(did);
                    DeptName = dept.DeptName;                
                }
            }
        }
    }
}

　　　　 public void OnPost()
        {
            string deptName = Request.Form["deptname"];
            string deptId = Request.Query["deptid"];
            if (int.TryParse(deptId, out int did))
            {
                if (did > 0) //传递过来的deptid值 >0 则修改，否则新增。
                {
                    ModifyDept(did, deptName);
                }
                else
                {
                    int newDeptId = AddDept(deptName);
                    deptId = newDeptId.ToString();
                }
            }
            //执行完之后让页面重新加载一下避免用户刷新的时候数据再次回传
            Response.Redirect("/Auth/DeptEdit?deptid="+ deptId);
        }

　　　　 //新增部门
        private int AddDept(string deptName)
        {
            TDept dept = new TDept
            {
                DeptName = deptName,
                IsValid = 1,
                CreateTime = DateTime.Now
            };
            _context.TDepts.Add(dept);
            _context.SaveChanges();            

　　　　　　 return dept.DeptId; //返回的部门编号一边刷新页面
        }

　　　　 //修改部门
        private void ModifyDept(int deptId, string deptName)
        {
            //设置序列化时的对中文的编码方式
            JsonSerializerOptions options = new JsonSerializerOptions
            {
                Encoder = JavaScriptEncoder.Create(UnicodeRanges.All),
            };

            List<TLog> logList = GenerateLog(); //初始化包含2条日志信息的列表

            //先找出要更改的实体
            TDept dept = _context.TDepts.Find(deptId);

            //将更改前的数据序列化成json后记录下来
            logList[0].TableData = JsonSerializer.Serialize<TDept>(dept, options);

            //给要更改的属性赋值
            dept.DeptName = deptName;
            dept.ModifyTime = DateTime.Now;

            //将更改后的数据序列化成json后记录下来
            logList[1].TableData = JsonSerializer.Serialize<TDept>(dept, options);

　　　　　　  //保存数据到t_log表
            _context.TLogs.AddRange(logList);

            //将更改保存到数据库
            _context.SaveChanges();
        }


        /// <summary>
        /// 将更改前和更改后的数据保存到t_log表
        /// </summary>
        /// <returns></returns>
        private List<TLog> GenerateLog()
        {
            string batchNo = Guid.NewGuid().ToString();
            TLog beforeLog = new TLog
            {
                UserId = 6,
                UserName = "赵六",
                BatchNo = batchNo,
                TableName = "t_dept",
                TableData = "",
                LogTime = DateTime.Now
            };
            TLog afterLog = new TLog
            {
                UserId = 6,
                UserName = "赵六",
                BatchNo = batchNo,
                TableName = "t_dept",
                TableData = "",
                LogTime = DateTime.Now
            };

            List<TLog> logList = new List<TLog>();
            logList.Add(beforeLog);
            logList.Add(afterLog);

            return logList;
        }