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

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

对我来说，这是通过在传递参数时从存储过程中拉回数据来实现的。

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

_db是dbContext

2017-02-16 00:50:46

我发现以代码优先的方式调用存储过程并不方便。

我更喜欢用Dapper代替。

下面的代码是用实体框架编写的:

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);

我认为第二段代码更容易理解。

2018-08-11 21:36:18

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

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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