关于C#中数据库编程问题！！很急！！

Question

[C#]例子OleDbDataAdapter catDA = new OleDbDataAdapter("SELECT CategoryID, CategoryName FROM Categories", nwindConn);            catDA.UpdateCommand = new OleDbCommand("UPDATE Categories SET CategoryName = ? " +
                                       "WHERE CategoryID = ?" , nwindConn);catDA.UpdateCommand.Parameters.Add("@CategoryName", OleDbType.VarChar, 15, "CategoryName");OleDbParameter workParm = catDA.UpdateCommand.Parameters.Add("@CategoryID", OleDbType.Integer);
workParm.SourceColumn = "CategoryID";
workParm.SourceVersion = DataRowVersion.Original;DataSet catDS = new DataSet();
catDA.Fill(catDS, "Categories");    DataRow cRow = catDS.Tables["Categories"].Rows[0];
cRow["CategoryName"] = "New Category";
catDA.Update(catDS);

Answer 1

http://msdn.microsoft.com/library/en-us/cpguide/html/cpconupdatingdatabasewithdataadapterdataset.asp