How to get float value with SqlDataReader?

Question

In my database, I have NextStatDistanceTime value as a float. When \"float time = reader.GetFloat(0);\" line excecuted, it gives an error of

Answer 1

As you can read here a sql-server float maps to a .NET double, so you need to use GetDouble:

double totaltime = 0;  // necessary, double is wider than float
// ...

while (reader.Read())
{
    double time = reader.GetDouble(0);
    totaltime = totaltime + time;
    // conn.Close(); no, not in this loop, should be closed in the finally or via using-statement
}