Xamarin android通过webservice将数据从列表视图保存到数据库

Question

当我尝试保存最后一个项目时，我在列表视图中的每个项目都有按钮没有问题，但是当我尝试保存另一个项目时，它会多次保存数据

这是我的代码

公共覆盖视图GetView（int位置、视图转换视图、ViewGroup父级）

    {

        var item = trans[position];

        View view = convertView;

        if (view == null) // no view to re-use, create new

            view = context.LayoutInflater.Inflate(Resource.Layout.trans_layout, null);

   view.FindViewById<TextView>(Resource.Id.supply_amount_txt).Text = item.amount1;
        view.FindViewById<TextView>(Resource.Id.demand_amount_txt).Text = item.amount2;
        //view.FindViewById<TextView>(Resource.Id.Text3).Text = item.client_code;
        view.FindViewById<TextView>(Resource.Id.supply_cur_txt).Text = item.cur1;
        view.FindViewById<TextView>(Resource.Id.demadn_cur_txt).Text = item.cur2;
        view.FindViewById<TextView>(Resource.Id.rate_txt).Text = item.rate;
        view.FindViewById<TextView>(Resource.Id.ID_txt).Text = item.tran_id;
        view.FindViewById<TextView>(Resource.Id.user_name_txt).Text = item.username;
        view.FindViewById<TextView>(Resource.Id.tran_date_time_txt).Text = item.tran_date ;
        accept_btn = view.FindViewById<Button>(Resource.Id.btn);        
        amo2 = Convert.ToDecimal(item.amount2);
        cu2 = item.cur2;
        amo1 = Convert.ToDecimal(item.amount1);
        cu1 = item.cur1;
        rat = Convert.ToDecimal(item.rate);
        tr_id = Convert.ToInt32(item.tran_id);
        cl_code = item.client_code;
           accept_btn.Click +=delegate {
               myWS.ChekTranIDAsync(Convert.ToInt32(item.tran_id));
               XTran = Convert.ToInt32(Convert.ToInt32(item.tran_id));
               myWS.ChekTranIDCompleted += MyWS_ChekTranIDCompleted;

           };
 


        return view;
      
    }


private void MyWS_ChekTranIDCompleted(object sender, myWS.ChekTranIDCompletedEventArgs e)
    {
        //myWS.accept_tranAsync("123", Convert.ToDecimal(item.amount2), item.cur2, Convert.ToDecimal(item.amount1), item.cur1, Convert.ToDecimal(item.rate), "ابو ليلى", Convert.ToInt32(item.tran_id), item.client_code);
        myWS.accept_tranAsync("123", amo2, cu2, amo1, cu2, rat, "xxx", XTran, cl_code);
        myWS.accept_tranCompleted += MyWS_accept_tranCompleted;


    }

Answer 1

accept_btn.Click +=delegate

当项目被回收以进行视觉显示并且GetView为同一视图持有人运行多次时，此代码会执行多次。所以你需要先取消订阅。