.NET[C#]Dapper中如何调用存储过程(Stored Procedure)的方法?
方案一
简单的使用案例
var user = cnn.Query<User>("spGetUser", new {Id = 1},
commandType: CommandType.StoredProcedure).First();
你也可以使用 Dapper 的动态参数: DynamicParameters :
var p = new DynamicParameters();
p.Add("@a", 11);
p.Add("@b", dbType: DbType.Int32, direction: ParameterDirection.Output);
p.Add("@c", dbType: DbType.Int32, direction: ParameterDirection.ReturnValue);
cnn.Execute("spMagicProc", p, commandType: CommandType.StoredProcedure);
int b = p.Get<int>("@b");
int c = p.Get<int>("@c");
方案二
存储过程样例如下:
alter proc [dbo].[UserlogincheckMVC]
@username nvarchar(max),
@password nvarchar(max)
as
begin
if exists(select Username from Adminlogin where Username =@username and Password=@password)
begin
return 1
end
else
begin
return 0
end
end
C#中Dapper调用方法如下:
var parameters = new DynamicParameters();
string pass = EncrytDecry.Encrypt(objUL.Password);
conx.Open();
parameters.Add("@username", objUL.Username);
parameters.Add("@password", pass);
parameters.Add("@RESULT", dbType: DbType.Int32, direction: ParameterDirection.ReturnValue);
var RS = conx.Execute("UserlogincheckMVC", parameters, null, null, commandType: CommandType.StoredProcedure);
int result = parameters.Get<int>("@RESULT");
方案三
如果在 .NET Core 中使用Dapper调用存储过程:
控制器(Controller):
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Http;
using SocialStoriesCore.Data;
using Microsoft.EntityFrameworkCore;
using Dapper;
using System.Data;
using System.Data.SqlClient;
public class TestController : Controller
{
private string connectionString;
public IDbConnection Connection
{
get { return new SqlConnection(connectionString); }
}
public TestController()
{
connectionString = @"Data Source=OCIUZWORKSPC;Initial Catalog=SocialStoriesDB;Integrated Security=True";
}
public JsonResult GetEventCategory(string q)
{
using (IDbConnection dbConnection = Connection)
{
var categories = dbConnection.Query<ResultTokenInput>("GetEventCategories", new { keyword = q },
commandType: CommandType.StoredProcedure).FirstOrDefault();
return Json(categories);
}
}
public class ResultTokenInput
{
public int ID { get; set; }
public string name { get; set; }
}
}
存储过程(Stored Procedure):
create PROCEDURE GetEventCategories
@keyword as nvarchar(100)
AS
BEGIN
WITH CTE(Id, Name, IdHierarchy,parentId) AS
(
SELECT
e.EventCategoryID as Id, cast(e.Title as varchar(max)) as Name,
cast(cast(e.EventCategoryID as char(5)) as varchar(max)) IdHierarchy,ParentID
FROM
EventCategory e where e.Title like '%'+@keyword+'%'
-- WHERE
-- parentid = @parentid
UNION ALL
SELECT
p.EventCategoryID as Id, cast(p.Title + '>>' + c.name as varchar(max)) as Name,
c.IdHierarchy + cast(p.EventCategoryID as char(5)),p.ParentID
FROM
EventCategory p
JOIN CTE c ON c.Id = p.parentid
where p.Title like '%'+@keyword+'%'
)
SELECT
*
FROM
CTE
ORDER BY
IdHierarchy
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