将行添加到数据集中的数据表

Question

I am trying to copy a row from one table to another in same dataset. code I am using

dsFrom.Tables["asd2"].Rows.Add(dsFrom.Tables["asd"].Rows[0].ItemArray);

I am getting an NullRefferenceException. I've determined that Rows are null, even though there is data in both tables. Can anyone explain why is this happening? Or maybe there is another solution for my problem.

Thanks


This is how I am loading data in them

string query = @"select * from table1;
                SqlDataAdapter da = new SqlDataAdapter(query, conn);
                DataSet dsFrom = new DataSet();
                da.Fill(dsFrom, "asd");
                da.Fill(dsFrom, "asd2");

Answer 1

May be you should try to copy rows by this way:

foreach (var row in dsFrom.Tables["asd"].Rows)
{
     dsFrom.Tables["asd2"].ImportRow(row);
}