如何执行在 EF 6 中返回可变列数的存储过程

Question

Is there any way I can execute a stored procedure using EF 6 that can somehow handle variable number of columns returned? I am doing a dynamic pivot in the stored procedure (converting row values to columns) and so, the number of columns returned varies based on an input id to the procedure. So, it is not known at compile time for me to declare properties in strongly typed POCO classes.

I also tried using other constructors of SqlQuery and I just couldn't figure out how to get the results back.

Thanks

Answer 1

I finally did this.

var param = new SqlParameter[] {
    new SqlParameter() {
        ParameterName = "ID",
        SqlDbType =  System.Data.SqlDbType.BigInt,
        Direction = System.Data.ParameterDirection.Input,
        Value = someid
    }};
    
var context = new SystemDBContext();

using (var cnn = context.Database.Connection)
{
    var cmm = cnn.CreateCommand();
    cmm.CommandType = System.Data.CommandType.StoredProcedure;
    cmm.CommandText = "[dbo].[SPName]";
    cmm.Parameters.AddRange(param);
    cmm.Connection = cnn;
    cnn.Open();
    var reader = cmm.ExecuteReader();

    var list = Enumerable.Range(0, reader.FieldCount).Select(reader.GetName).ToList();
    int colCount = reader.FieldCount;

    while (reader.Read())
    {   
        for (var counter = 0; counter <colCount; counter++)
        {
            //do whatever`
        }           
    }       
}