public double Sumar_Valores_de_Campos(string sqlsum)
{
double res = 0;
OdbcDataReader dr = null;
if (conexion.State == ConnectionState.Open)
{
conexion.Close();
}
conexion.Open();
try
{
dr = new OdbcCommand(sqlsum, conexion).ExecuteReader();
if (dr.HasRows)
{
dr.Read();
if (dr.IsDBNull(0))
{
res = 0;
}
else
{
res = Convert.ToDouble(dr.GetValue(0));
}
}
//if (Convert.ToDouble(new OdbcCommand(sqlsum, conexion).ExecuteScalar()) >= 0)
//{
// res = Convert.ToDouble(new OdbcCommand(sqlsum, conexion).ExecuteScalar());
//}
//else
//{
// res = 0;
//}
}
catch (Exception ex)
{
res = 0;
MessageBox.Show("Error al momento de realizar la suma de valores de la Data Base: " + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
dr.Close();
}
return(res);
}