C# - Passing parameter to stored procedure and return IEnumerable

c# dapper sql-server stored-procedures

Question

can I directly pass the parameter in the query as shown below?

There is error so anyone could help?

public IEnumerable ListTop10countries(string direction)
{
    using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["MYCON"].ToString()))
    {
        var list = con.Query<OutputCountries>("Usp_GetTop10", direction).AsEnumerable();       
        return list;
    }
}

Error:

An exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll but was not handled in user code

Additional information: Procedure or function 'Usp_GetTop10' expects parameter '@direction', which was not supplied.

The stored proc script as is below:

CREATE proc [dbo].[Usp_GetTop10]
@direction nvarchar(30)
as
begin
SELECT TOP 10 
      [country]    
      ,[Tons]
  FROM [master].[dbo].[a]
  where direction = @direction
  order by [Tons] Desc
end
GO

Accepted Answer

try this

public IEnumerable ListTop10countries(string mydirection)
{
    using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["MYCON"].ToString()))
    {
         var list = con.Query<OutputCountries>("Usp_GetTop10", new {direction = mydirection}, commandType: CommandType.StoredProcedure).AsEnumerable();
         return list;
    }
}


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