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

当EDMX创建时，如果你在表选择选项中选择存储过程，那么只需使用过程名调用存储过程…

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.

2018-04-25 10:47:19

其他回答

您可以在DbContext类中调用存储过程，如下所示。

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

具有多个结果集的存储过程

2014-01-03 19:10:01

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();
}

2017-11-14 10:25:56

我用ExecuteSqlCommand解决了这个问题

把你自己的方法放在DbContext中作为你自己的实例:

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);
}

所以你可以在你的后台代码中有一个这样的方法:

[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

希望这对你有帮助。

2014-05-07 06:07:27

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

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

2016-02-25 09:31:25

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

如何在实体框架6中调用存储过程(代码优先)?

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