EF Core 2.1 +数据库视图
1.参考文档
https://stackoverflow.com/questions/36012616/working-with-sql-views-in-entity-framework-core
https://docs.microsoft.com/en-us/ef/core/modeling/query-types
Step 1:
首先数据库新建一个 View视图,咱们称之为"V_USer_FromHRM".
Step 2:
项目中新建一个Model 与视图查询结果相对应。
1 public class V_HRMUser
2 {
3 public V_HRMUser()
4 {
5
6 }
7
8 public string Empl_code { get; set; }
9 public string Sitecode { get; set; }
10 public string Department { get; set; }
11 public string Function { get; set; }
12 public string Position { get; set; }
13
14
15 }
Step3:
Dbconext中添加如下代码(涉及项目内容,代码有删减,看得明白就好):)
1 public class DefaultDbContext : DbContext
2 {
3 public DefaultDbContext(DbContextOptions<DefaultDbContext> options) : base(options)
4 {
5
6 }
7
8
9
10 public DbQuery<V_HRMUser> V_HRMUsers { get; set; }
11
12
13
14 protected override void OnModelCreating(ModelBuilder modelBuilder)
15 {
16 //不必太在意字段信息,涉及到项目内容,已经做了删改。
17 modelBuilder.Query<V_HRMUser>(v => {
18 v.ToView("V_USer_FromHRM");
19 v.Property(p => p.Department).HasColumnName("department");
20 v.Property(p => p.Empl_code).HasColumnName("empl_code");
21 v.Property(p => p.EmpType).HasColumnName("emptype");
22 v.Property(p => p.Ename).HasColumnName("ename");
23
24
25
26 }
27 );
28 }
29
30 }
Step 4:
测试结果:
随便找个 Controller ,
public class HomeController : BaseController
{
private DefaultDbContext _context;
public HomeController( DefaultDbContext context)
{
_context = context;
var list = _context.V_HRMUsers.ToList();
}
}
结果:
To DO
1.类型转换转换问题。
2.数据是只读的,有没有更好的读取方式?
3.缓存?