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

I also had a similar issue and ended up doing this:

if (!oDR.IsDBNull(0))
    Rating = (float)oDR.GetSqlDecimal(0).Value;

oDR.GetFloat(0) was returning and invalid cast exception when accessing the result of a SELECT AVG(...).

HTH