reading an array column in C#

问题

My code is like this, but it gives an error:

//array_field is an array of double values 
NpgsqlCommand Command = new NpgsqlCommand("SELECT array_fied from atable"); 
NpgsqlDataReader dr = Command.ExecuteReader(); 
while (dr.Read()) 
{
    double[] rrr = dr.GetDouble(dr.GetOrdinal("array_field")); 
}

The error message is: cannot implicitly convert 'double' to 'double[]'. I tried other variations as well which also didn't work.

thanks for your help Judit

回答1:

Double[] rrr = dr["array_field"] as Double[];

来源：https://stackoverflow.com/questions/18654994/reading-an-array-column-in-c-sharp