如何在实体框架6中调用存储过程(代码优先)?

我对实体框架6非常陌生，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

系类:

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?

当前回答

它为我工作在代码第一。它返回一个匹配视图模型属性的列表(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();

已更新

Context是继承DbContext类的实例，如下所示。

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

var Context = new  ApplicationDbContext();

2017-12-19 08:37:39

其他回答

minddless passenger有一个项目，允许使用实体框架从存储过程中返回多个结果集。下面是他的一个例子....

using (testentities te = new testentities())
{
    //-------------------------------------------------------------
    // Simple stored proc
    //-------------------------------------------------------------
    var parms1 = new testone() { inparm = "abcd" };
    var results1 = te.CallStoredProc<testone>(te.testoneproc, parms1);
    var r1 = results1.ToList<TestOneResultSet>();
}

2015-08-30 08:25:58

您正在使用MapToStoredProcedures()，这表明您正在将实体映射到存储过程，在执行此操作时，您需要放弃存在存储过程的事实，并正常使用上下文。像这样(写入浏览器，所以没有测试)

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

如果你真正想做的只是直接调用存储过程，那么使用SqlQuery

2014-01-03 14:12:49

首先使用MySql和实体框架代码

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();

2019-05-22 09:26:24

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();
        }

2019-04-10 23:08:24

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。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，如下所示:

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

        public string Gender { get; set; }

        public decimal Payout { get; set; }
    }

然后调用该过程，执行以下操作:

    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对象的列表。您可以根据需要使用任意多的参数调用SqlQuery。

2014-08-21 14:30:11

如何在实体框架6中调用存储过程(代码优先)?

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