如何在实体框架6（代码优先）中调用存储过程？

Question

我是Entity Framework 6的新手，我想在我的项目中实现存储过程。我有一个存储过程如下：

ALTER PROCEDURE [dbo].[insert_department]
    @Name [varchar](100)
AS
BEGIN
    INSERT [dbo].[Departments]([Name])
    VALUES (@Name)

    DECLARE @DeptId int

    SELECT @DeptId = [DeptId]
    FROM [dbo].[Departments]
    WHERE @@ROWCOUNT > 0 AND [DeptId] = SCOPE_IDENTITY()

    SELECT t0.[DeptId]
    FROM [dbo].[Departments] AS t0
    WHERE @@ROWCOUNT > 0 AND t0.[DeptId] = @DeptId
END

Department上课：

public class Department
{
    public int DepartmentId { get; set; }       
    public string Name { get; set; }
}

modelBuilder 
.Entity<Department>() 
.MapToStoredProcedures(s => 
s.Update(u => u.HasName("modify_department") 
               .Parameter(b => b.Department, "department_id") 
               .Parameter(b => b.Name, "department_name")) 
 .Delete(d => d.HasName("delete_department") 
               .Parameter(b => b.DepartmentId, "department_id")) 
 .Insert(i => i.HasName("insert_department") 
               .Parameter(b => b.Name, "department_name")));

protected void btnSave_Click(object sender, EventArgs e)
{
    string department = txtDepartment.text.trim();

    // here I want to call the stored procedure to insert values
}

我的问题是：如何调用存储过程并将参数传递给它？

Answer 1

您可以按照以下方式在DbContext课程中调用存储过程。

this.Database.SqlQuery<YourEntityType>("storedProcedureName",params);

但是如果您的存储过程返回多个结果集作为示例代码，那么您可以在MSDN上看到这篇有用的文章

Stored Procedures with Multiple Result Sets

Answer 2

您所要做的就是创建一个对象，该对象具有与存储过程返回的结果相同的属性名称。对于以下存储过程：

    CREATE PROCEDURE [dbo].[GetResultsForCampaign]  
    @ClientId int   
    AS
    BEGIN
    SET NOCOUNT ON;

    SELECT AgeGroup, Gender, Payout
    FROM IntegrationResult
    WHERE ClientId = @ClientId
    END

创建一个类似于：

的类

    public class ResultForCampaign
    {
        public string AgeGroup { get; set; }

        public string Gender { get; set; }

        public decimal Payout { get; set; }
    }

然后通过执行以下操作调用该过程：

    using(var context = new DatabaseContext())
    {
            var clientIdParameter = new SqlParameter("@ClientId", 4);

            var result = context.Database
                .SqlQuery<ResultForCampaign>("GetResultsForCampaign @ClientId", clientIdParameter)
                .ToList();
    }

结果将包含ResultForCampaign个对象的列表。您可以根据需要使用尽可能多的参数调用SqlQuery。

Answer 3

我用ExecuteSqlCommand

解决了这个问题

将自己的方法放在DbContext中作为您自己的实例：

public void addmessage(<yourEntity> _msg)
{
    var date = new SqlParameter("@date", _msg.MDate);
    var subject = new SqlParameter("@subject", _msg.MSubject);
    var body = new SqlParameter("@body", _msg.MBody);
    var fid = new SqlParameter("@fid", _msg.FID);
    this.Database.ExecuteSqlCommand("exec messageinsert @Date , @Subject , @Body , @Fid", date,subject,body,fid);
}

所以你可以在代码隐藏中使用这样的方法：

[WebMethod] //this method is static and i use web method because i call this method from client side
public static void AddMessage(string Date, string Subject, string Body, string Follower, string Department)
{
    try
    {
        using (DBContext reposit = new DBContext())
        {
            msge <yourEntity> Newmsg = new msge();
            Newmsg.MDate = Date;
            Newmsg.MSubject = Subject.Trim();
            Newmsg.MBody = Body.Trim();
            Newmsg.FID= 5;
            reposit.addmessage(Newmsg);
        }
    }
    catch (Exception)
    {
        throw;
    }
}

这是我的SP：

Create PROCEDURE dbo.MessageInsert

    @Date nchar["size"],
    @Subject nchar["size"],
    @Body nchar["size"],
    @Fid int
AS
    insert into Msg (MDate,MSubject,MBody,FID) values (@Date,@Subject,@Body,@Fid)
    RETURN

希望帮助你

Answer 4

使用您的示例，有两种方法可以实现此目的：

1 - 使用存储过程映射

请注意，此代码可以使用或不使用映射。如果关闭实体上的映射，EF将生成insert + select语句。

protected void btnSave_Click(object sender, EventArgs e)
{
     using (var db = DepartmentContext() )
     {
        var department = new Department();

        department.Name = txtDepartment.text.trim();

        db.Departments.add(department);
        db.SaveChanges();

        // EF will populate department.DepartmentId
        int departmentID = department.DepartmentId;
     }
}

2 - 直接调用存储过程

protected void btnSave_Click(object sender, EventArgs e)
{
     using (var db = DepartmentContext() )
     {
        var name = new SqlParameter("@name, txtDepartment.text.trim());

        //to get this to work, you will need to change your select inside dbo.insert_department to include name in the resultset
        var department = db.Database.SqlQuery<Department>("dbo.insert_department @name", name).SingleOrDefault();

       //alternately, you can invoke SqlQuery on the DbSet itself:
       //var department = db.Departments.SqlQuery("dbo.insert_department @name", name).SingleOrDefault();

        int departmentID = department.DepartmentId;
     }
}

我建议使用第一种方法，因为您可以直接使用department对象而不必创建一堆SqlParameter对象。

Answer 5

您正在使用MapToStoredProcedures()表示您正在将实体映射到存储过程，在执行此操作时，您需要放弃存储过程并使用context正常的事实。 像这样的东西（写入浏览器所以没有经过测试）

using(MyContext context = new MyContext())
{
    Department department = new Department()
    {
        Name = txtDepartment.text.trim()
    };
    context.Set<Department>().Add(department);
}

如果您真正想要的是直接调用存储过程，请使用SqlQuery

Answer 6

现在，您还可以使用我创建的约定，该约定允许从EF本地调用存储过程（包括返回多个结果集的存储过程），TVF和标量UDF。

  

在Entity Framework 6.1发布之前，只有在执行数据库优先时，才能在EF中使用存储功能（即表值函数和存储过程）。有一些解决方法可以在Code First应用程序中调用商店功能，但您仍然无法在Linq查询中使用TVF，这是最大的限制之一。在EF 6.1中，映射API被公开（随着一些额外的调整）使得在Code First应用程序中使用商店功能成为可能。

Read more

  

我在过去两周内非常努力，这里是 - 在使用Code First方法和Entity Framework 6.1的应用程序中使用存储函数（即存储过程，表值函数等）的约定的beta版本.1（或更新）。我对本版本中包含的修复和新功能非常满意。

Read more

Answer 7

这可以通过在传入参数时从存储过程中拉回数据来为我工作。

var param = new SqlParameter("@datetime", combinedTime);
var result = 
        _db.Database.SqlQuery<QAList>("dbo.GetQAListByDateTime @datetime", param).ToList();

_db是dbContext

Answer 8

object[] xparams = {
            new SqlParameter("@ParametterWithNummvalue", DBNull.Value),
            new SqlParameter("@In_Parameter", "Value"),
            new SqlParameter("@Out_Parameter", SqlDbType.Int) {Direction = ParameterDirection.Output}};

        YourDbContext.Database.ExecuteSqlCommand("exec StoreProcedure_Name @ParametterWithNummvalue, @In_Parameter, @Out_Parameter", xparams);
        var ReturnValue = ((SqlParameter)params[2]).Value;  

Answer 9

请看一下此链接，该链接显示了EF 6与存储过程的映射如何进行插入，更新和删除：http://msdn.microsoft.com/en-us/data/dn468673

<强>加成

以下是从Code First调用存储过程的一个很好的示例：

假设您必须使用单个参数执行存储过程，并且该存储过程返回一组与实体状态匹配的数据，因此我们将具有：

var countryIso = "AR"; //Argentina

var statesFromArgentina = context.Countries.SqlQuery(
                                      "dbo.GetStatesFromCountry @p0", countryIso
                                                    );

现在我们假设我们要用两个参数执行另一个存储过程：

var countryIso = "AR"; //Argentina
var stateIso = "RN"; //Río Negro

var citiesFromRioNegro = context.States.SqlQuery(
                            "dbo.GetCitiesFromState @p0, @p1", countryIso, stateIso
                          );

请注意，我们正在为参数使用基于索引的命名。这是因为Entity Framework会将这些参数作为DbParameter对象包装起来，以避免任何SQL注入问题。

希望这个例子有所帮助！

Answer 10

public IList<Models.StandardRecipeDetail> GetRequisitionDetailBySearchCriteria(Guid subGroupItemId, Guid groupItemId)
{
    var query = this.UnitOfWork.Context.Database.SqlQuery<Models.StandardRecipeDetail>("SP_GetRequisitionDetailBySearchCriteria @SubGroupItemId,@GroupItemId",
    new System.Data.SqlClient.SqlParameter("@SubGroupItemId", subGroupItemId),
    new System.Data.SqlClient.SqlParameter("@GroupItemId", groupItemId));
    return query.ToList();
}

Answer 11

它首先在代码中为我工作。它返回一个具有视图模型匹配属性的列表（StudentChapterCompletionViewModel）

var studentIdParameter = new SqlParameter
{
     ParameterName = "studentId",
     Direction = ParameterDirection.Input,
     SqlDbType = SqlDbType.BigInt,
     Value = studentId
 };

 var results = Context.Database.SqlQuery<StudentChapterCompletionViewModel>(
                "exec dbo.sp_StudentComplettion @studentId",
                 studentIdParameter
                ).ToList();

针对上下文进行了更新

Context是继承DbContext的类的实例，如下所示。

public class ApplicationDbContext : DbContext
{
    public DbSet<City> City { get; set; }
}

var Context = new  ApplicationDbContext();

Answer 12

Mindless passenger有一个项目，允许使用实体框架从存储过程返回多个结果集。他下面的一个例子......

div = css_select("div[id*='ample')")
while True: 
   divs.append(div)
   div = div + css_select("div[id*='ample')")

Answer 13

您可以将参数传递到sp_GetById并在ToList()或FirstOrDefault();中获取结果

var param  = new SqlParameter("@id", 106);
var result = dbContext
               .Database
               .SqlQuery<Category>("dbo.sp_GetById @id", param)
               .FirstOrDefault();

Answer 14

.NET Core 5.0 没有 FromSql 而是有 FromSqlRaw

以下所有内容都对我有用。此处的 Account 类是 C# 中的实体，其表名和列名与数据库中的完全相同。

应用配置类如下

class AppConfiguration
{
    public AppConfiguration()
    {
        var configBuilder = new ConfigurationBuilder();
        var path = Path.Combine(Directory.GetCurrentDirectory(), "appsettings.json");
        configBuilder.AddJsonFile(path, false);
        var root = configBuilder.Build();
        var appSetting = root.GetSection("ConnectionStrings:DefaultConnection");
        sqlConnectionString = appSetting.Value;
    }

    public string sqlConnectionString { get; set; }
}

DbContext 类：

public class DatabaseContext : DbContext
{
    public class OptionsBuild
    {
        public OptionsBuild()
        {
            setting = new AppConfiguration();
            opsBuilder = new DbContextOptionsBuilder<DatabaseContext>();
            opsBuilder.UseSqlServer(setting.sqlConnectionString);
            dbOptions = opsBuilder.Options;
        }

        public DbContextOptionsBuilder<DatabaseContext> opsBuilder { get; set; }
        public DbContextOptions<DatabaseContext> dbOptions { get; set; }

        private AppConfiguration setting { get; set; }
    }

    public static OptionsBuild ops = new OptionsBuild();

    public DatabaseContext(DbContextOptions<DatabaseContext> options) : base(options)
    {
        //disable initializer
        //  Database.SetInitializer<DatabaseContext>(null);
    }

    public DbSet<Account> Account { get; set; }
}

此代码应位于您的数据访问层：

List<Account> accounts = new List<Account>();
var context = new DatabaseContext(DatabaseContext.ops.dbOptions);
accounts = await context.Account.ToListAsync();   //direct select from a table

var param = new SqlParameter("@FirstName", "Bill");
accounts = await context.Account.FromSqlRaw<Account>("exec Proc_Account_Select", 
param).ToListAsync();            //procedure call with parameter
        
accounts = context.Account.FromSqlRaw("SELECT * FROM dbo.Account").ToList();  //raw query

Answer 15

在MYsql中创建过程。

delimiter //
create procedure SP_Dasboarddata(fromdate date, todate date)
begin
select count(Id) as count,date,status,sum(amount) as amount from 
details
where (Emidate between fromdate and todate)
group by date ,status;
END;
//

创建包含存储过程返回结果集值的类

[Table("SP_reslutclass")]
public  class SP_reslutclass
{
    [Key]
    public int emicount { get; set; }
    public DateTime Emidate { get; set; }
    public int ? Emistatus { get; set; }
    public int emiamount { get; set; }

}

在Dbcontext中添加类

  public  class ABCDbContext:DbContext
{
    public ABCDbContext(DbContextOptions<ABCDbContext> options)
       : base(options)
    {

    }

 public DbSet<SP_reslutclass> SP_reslutclass { get; set; }
}

存储库中的呼叫实体

   var counts = _Dbcontext.SP_reslutclass.FromSql("call SP_Dasboarddata 
                    ('2019-12-03','2019-12-31')").ToList();

Answer 16

首先使用MySql和Entity框架代码的方法：

public class Vw_EMIcount
{
    public int EmiCount { get; set; }
    public string Satus { get; set; }
}

var result = context.Database.SqlQuery<Vw_EMIcount>("call EMIStatus('2018-3-01' ,'2019-05-30')").ToList();

Answer 17

什么都不用做...为代码第一种方法创建dbcontext时初始化 流畅的API区域下面的命名空间列出了sp，并在其他需要的地方使用它。

public partial class JobScheduleSmsEntities : DbContext
{
    public JobScheduleSmsEntities()
        : base("name=JobScheduleSmsEntities")
    {
        Database.SetInitializer<JobScheduleSmsEntities>(new CreateDatabaseIfNotExists<JobScheduleSmsEntities>());
    }

    public virtual DbSet<Customer> Customers { get; set; }
    public virtual DbSet<ReachargeDetail> ReachargeDetails { get; set; }
    public virtual DbSet<RoleMaster> RoleMasters { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        //modelBuilder.Types().Configure(t => t.MapToStoredProcedures());

        //modelBuilder.Entity<RoleMaster>()
        //     .HasMany(e => e.Customers)
        //     .WithRequired(e => e.RoleMaster)
        //     .HasForeignKey(e => e.RoleID)
        //     .WillCascadeOnDelete(false);
    }
    public virtual List<Sp_CustomerDetails02> Sp_CustomerDetails()
    {
        //return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction<Sp_CustomerDetails02>("Sp_CustomerDetails");
        //  this.Database.SqlQuery<Sp_CustomerDetails02>("Sp_CustomerDetails");
        using (JobScheduleSmsEntities db = new JobScheduleSmsEntities())
        {
           return db.Database.SqlQuery<Sp_CustomerDetails02>("Sp_CustomerDetails").ToList();

        }

    }

}

}

public partial class Sp_CustomerDetails02
{
    public long? ID { get; set; }
    public string Name { get; set; }
    public string CustomerID { get; set; }
    public long? CustID { get; set; }
    public long? Customer_ID { get; set; }
    public decimal? Amount { get; set; }
    public DateTime? StartDate { get; set; }
    public DateTime? EndDate { get; set; }
    public int? CountDay { get; set; }
    public int? EndDateCountDay { get; set; }
    public DateTime? RenewDate { get; set; }
    public bool? IsSMS { get; set; }
    public bool? IsActive { get; set; }
    public string Contact { get; set; }
}

Answer 18

public static string ToSqlParamsString(this IDictionary<string, string> dict)
        {
            string result = string.Empty;
            foreach (var kvp in dict)
            {
                result += $"@{kvp.Key}='{kvp.Value}',";
            }
            return result.Trim(',', ' ');
        }

public static List<T> RunSproc<T>(string sprocName, IDictionary<string, string> parameters)
        {
            string command = $"exec {sprocName} {parameters.ToSqlParamsString()}";
            return Context.Database.SqlQuery<T>(command).ToList();
        }

Answer 19

我发现以代码优先方式调用存储过程并不方便。 我更喜欢使用Dapper

以下代码是用Entity Framework编写的：

var clientIdParameter = new SqlParameter("@ClientId", 4);

var result = context.Database
.SqlQuery<ResultForCampaign>("GetResultsForCampaign @ClientId", clientIdParameter)
.ToList();

以下代码是用Dapper编写的：

return Database.Connection.Query<ResultForCampaign>(
            "GetResultsForCampaign ",
            new
            {
                ClientId = 4
            },
            commandType: CommandType.StoredProcedure);

我相信第二段代码更容易理解。

Answer 20

当EDMX创建此时，如果您在表选择选项中选择存储过程，则只需使用过程名称调用存储过程...

var num1 = 1; 
var num2 = 2; 

var result = context.proc_name(num1,num2).tolist();// list or single you get here.. using same thing you can call insert,update or delete procedured.

Answer 21

这是EF（DB优先）在DbContext类中生成的内容：

public ObjectResult<int> Insert_Department(string department)
{
    var departmentParameter = new ObjectParameter("department", department);

    return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction<int>("insert_department", departmentParameter);
}

Answer 22

如果你想将表参数传递给存储过程，你必须为你的表参数设置TypeName属性。

SqlParameter codesParam = new SqlParameter(CODES_PARAM, SqlDbType.Structured);
            SqlParameter factoriesParam = new SqlParameter(FACTORIES_PARAM, SqlDbType.Structured);

            codesParam.Value = tbCodes;
            codesParam.TypeName = "[dbo].[MES_CodesType]";
            factoriesParam.Value = tbfactories;
            factoriesParam.TypeName = "[dbo].[MES_FactoriesType]";


            var list = _context.Database.SqlQuery<MESGoodsRemain>($"{SP_NAME} {CODES_PARAM}, {FACTORIES_PARAM}"
                , new SqlParameter[] {
                   codesParam,
                   factoriesParam
                }
                ).ToList();