...
...
OdbcConnection cn=new OdbcConnection("your connection string");
OdbcCommand cmd=new OdbcCommand("select * from tablename",cn);
 
cn.Open();
OdbcDataReader dr;
dr=cmd.ExecuteReader()
 
'First column name
string first=dr.GetName(0);
 
'Second column name
string second=dr.GetName(1);
...
...
dr.Close();
cn.Close();
.....

...
...
OdbcConnection cn=new OdbcConnection("your connection string");
OdbcDataAdapter adp=new OdbcDataAdapter("select * from tablename",cn);
DataTable dt=new DataTable();
adp.Fill(dt);
 
// first column name
string first = dt.Columns[0].ColumnName;
...
..
 ....