Invalid cast exception when reading result from SQLDataReader

Question

My stored procedure:

    @UserName nvarchar(64),

    AS

    BEGIN
    SELECT MPU.UserName, SUM(TS.Monday)as Monday //TS.Monday contains float value
    FROM db         


        

Answer 1

float monday = Convert.ToDouble(reader["Monday"]);

would be a nice approach. I am trying to find a solution for over an hour and it fails here. now it works fine.