Question

如何通过TextField向TableView添加多个记录（行）？

到目前为止，我可以设法通过TextField向TableView添加记录，但是当我更改TextField值并点击ADD按钮时，它会删除以前添加的记录并在TableView中显示新记录。

//  Code For Inserting Records to TableView Through TextField  //

 private void Add_details(){
    try {
        String Customer = txtCustomer.getText().trim();
        String Mobile = txtMobile.getText().trim();
        String Item  = txtItem.getText().trim();
        int unit_price = Integer.parseInt(txtUnitPrice.getText().trim());
        int qty = Integer.parseInt(txtQty.getText().trim());

       TableItems  t = new TableItems();
       ObservableList <TableItems> curnt_row = FXCollections.observableArrayList();

       t.setCustomer(Customer);
       t.setMobile(Mobile);
       t.setItem(Item);
       t.setUnit_price(String.valueOf(unit_price));
       t.setQty(String.valueOf(qty));
       t.setTotal(String.valueOf(total));

       curnt_row.add(t);
       tblItems.setItems(curnt_row);

        col_customer.setCellValueFactory(new PropertyValueFactory<>("customer"));
        col_mobile.setCellValueFactory(new PropertyValueFactory<>("mobile"));
        col_item.setCellValueFactory(new PropertyValueFactory<>("item"));
        col_qty.setCellValueFactory(new PropertyValueFactory<>("qty"));
        col_unitprice.setCellValueFactory(new PropertyValueFactory<>("unit_price"));
        col_total.setCellValueFactory(new PropertyValueFactory<>("total"));

    }catch (NumberFormatException e){
        e.printStackTrace();
    }catch (Exception e){
         e.printStackTrace();
    }
}

// CORDING FOR GET SELECTED ITEM FROM TABLEVIEW   //
// I WANT TO GET ALL ITEMS,
// NOT ONLY SELECTED ITEM SO THAT I COULD PERFORM BATCH INSERTION

      private void Get_table_values(){
          /*  LAMDA EXPRESSION                 */
        tblItems.getSelectionModel().selectedItemProperty().addListener
            ((obs, oldSelection, newSelection) -> {
         if (newSelection != null) {
            TableView.TableViewSelectionModel selectionModel = tblItems.getSelectionModel();
            ObservableList selectedCells = selectionModel.getSelectedCells();
            TablePosition tablePosition = (TablePosition) selectedCells.get(0);
            Object val = tablePosition.getTableColumn().getCellData(newSelection);
            String S_value = val.toString();
        }
   });
}

Answer 1

您正在替换整个items列表，而不是简单地添加单个项目。新列表开始为空，您添加的唯一项目是在Add_details方法中创建的项目。改为添加现有列表中的项目：

private final ObservableList <TableItems> curnt_row = FXCollections.observableArrayList();

...

// TableView initialisation
tblItems.setItems(curnt_row);

col_customer.setCellValueFactory(new PropertyValueFactory<>("customer"));
col_mobile.setCellValueFactory(new PropertyValueFactory<>("mobile"));
col_item.setCellValueFactory(new PropertyValueFactory<>("item"));
col_qty.setCellValueFactory(new PropertyValueFactory<>("qty"));
col_unitprice.setCellValueFactory(new PropertyValueFactory<>("unit_price"));
col_total.setCellValueFactory(new PropertyValueFactory<>("total"));

...

private void Add_details(){
    try {
        String Customer = txtCustomer.getText().trim();
        String Mobile = txtMobile.getText().trim();
        String Item  = txtItem.getText().trim();
        int unit_price = Integer.parseInt(txtUnitPrice.getText().trim());
        int qty = Integer.parseInt(txtQty.getText().trim());

       TableItems  t = new TableItems();

       t.setCustomer(Customer);
       t.setMobile(Mobile);
       t.setItem(Item);
       t.setUnit_price(String.valueOf(unit_price));
       t.setQty(String.valueOf(qty));
       t.setTotal(String.valueOf(total));

       curnt_row.add(t);
    } catch (Exception e) {
         e.printStackTrace();
    }
}

要获取所有项目，只需使用getItems或使用您知道已分配给items媒体资源的列表，例如在上面的例子中是curnt_row字段。

在JavaFX中向TableView添加多个记录

1 个答案: