Question

我正在尝试将数据从服务器转换为客户端（GXT网格）。在服务器端，我有一个包含数据的列表，确定无误。然后我实现RPC方法并假设它也可以。这是代码：

GWTService

@RemoteServiceRelativePath("gwtservice")
public interface GWTService extends RemoteService {
    public List<WebasystProductData> getWebasystProductData();
}

GWTServiceAsynch

public interface GWTServiceAsync {
    public void getWebasystProductData(AsyncCallback<List<WebasystProductData>> callback);
}

GWTServiceImpl

public class GWTServiceImpl extends RemoteServiceServlet implements GWTService {

    //private Map<String, WebasystProductData> productData;
    public List<WebasystProductData> getWebasystProductData() {

    WebasystConnection waConn = new WebasystConnection();
    List<WebasystProductData> waPD = waConn.getWebasystProductData();

    return waPD;
}

然后我使用我的beanmodel，beanmodelreader，listloader，listore和grid实现代理。

...

rpc = RpcInit.initRpc();

RpcProxy<BeanModel> proxy = new RpcProxy<BeanModel>() {

    @Override
    public void load(Object loadConfig, AsyncCallback callback) {
        rpc.getWebasystProductData(callback);
    }
};

BeanModelReader reader = new BeanModelReader();
BaseListLoader loader = new BaseListLoader(proxy, reader);
ListStore<BeanModel> store = new ListStore<BeanModel>(loader);

List<ColumnConfig> col = new ArrayList<ColumnConfig>();
ColumnConfig column = new ColumnConfig();
column.setId("productIdWA");
column.setHeader("ProductID");
column.setWidth(50);
col.add(column);

column = new ColumnConfig();
column.setId("productNameWA");
column.setHeader("productName");
column.setWidth(120);
col.add(column);

column = new ColumnConfig();
column.setId("productPriceWA");
column.setHeader("productPrice");
column.setWidth(80);
col.add(column);

column = new ColumnConfig();
column.setId("categoryIdWA");
column.setHeader("categoryID");
column.setWidth(80);
column.setAlignment(HorizontalAlignment.RIGHT);
col.add(column);

启动我的应用时 - 网格内没有数据。不知道问题是什么，没有错误...... 假设问题出在客户端代码中

Answer 1

网格本身不会执行初始加载。你有没有打电话给com.extjs.gxt.ui.client.data.Loader#load？

Answer 2

RpcProxy<List<WebasystProductData>> proxy= new RpcProxy<List<WebasystProductData>>() {
        @Override
        protected void load(Object loadConfig,AsyncCallback<List<WebasystProductData>> callback) {

            getWebasystProductData(config,callback);
        }
    };
    BeanModelReader reader = new BeanModelReader();
    ListLoader<ListLoadResult<ModelData>> loader = new BaseListLoader<ListLoadResult<ModelData>>(proxy, reader);
    ListStore<BeanModel> store = new LisStore<BeanModel>(loader);

然后只是：

Grid<BeanModel> grid = new Grid<BeanModel>(store,column);
    grid.addListener(Events.Attach, new Listener<GridEvent<BeanModel>>() {  
        public void handleEvent(GridEvent<BeanModel> be) {  
            loader.load();
        }  
      });

请记住，您的Pojo需要实现BeanModelTag接口

和

column = new ColumnConfig();
column.setId("XXX");

XXX需要与您的Pojo属性相同

GWT RPC和数据转换为GXT网格

2 个答案: