DataSet DataTable Import method cannot be inserted

Multiple attempts to insert a row into a table in a dataset by using the Import method

No error, but check data set discovery data is not inserted, and has a long burst of inspiration

If the table in the dataset is empty (the table in the dataset is empty before the table is inserted)

Add a row before inserting successfully

I have a problem with practice.

Release code

DataRow Rowadd = ds. tables[0].            NewRow (); rowadd["d_inventory_id"] = row["d_inventory_id"].            ToString (); rowadd["D_name"] = row["D_name"]; rowadd["D_model"] = row["D_model"]; rowadd["D_vin"] =""; rowadd["D_unit"] = row["D_unit"]; rowadd["D_number"] ="1"; rowadd["D_color"] =colour; rowadd["D_bomconfig"] =config; rowadd["D_ddon"] = row["D_CN"];//No judgment at first, no error, but the data set is empty.//later added the judgment first insert call add otherwise call ImportRow             for(inti =1; I <=int. Parse (RESTN); i++)            {                if(i = =1) {ds. tables[0].                Rows.Add (Rowadd); }                Else{ds. tables[0].                ImportRow (Rowadd); }                                }

DataSet DataTable Import method cannot be inserted