如何更新数据库，当在smartGwt ListGrid中删除或添加一行时

Question

    i want to delete the row from the grid...and changes should reflect
    into my database..Please provide me some idea to do that...
The above code was later updated by me and i already added the data source in which i am initializing the fields. Updated code as follws 
listgrid = new SigmaListGrid();
listgrid.setDataSource(screenDS);
return listgrid;                                                                                                       public 
SigmaListGrid() {
        setShowFilterEditor(true);
        setHeight100();
        setWidth100();
        setShowRecordComponents(true);
        setShowRecordComponentsByCell(true);
        setCanRemoveRecords(true);
        setShowAllRecords(true);
        setCanResizeFields(true);
        setCanEdit(true);
        setAutoSaveEdits(false);
    }                                                                       
}

= = =

公共类ScreenDataSource扩展TPDDataSource {

/**
 * @param id
 */
public ScreenDataSource(String id) {
    super(id);
    initializeFields();
}
private void initializeFields() {
    DataSourceField pkField = new DataSourceIntegerField(...
    DataSourceField screenName = new DataSourceTextField(.....);
    screenName.setCanEdit(true);
    setFields(pkField, screenName;
}
@Override
public void clearData() {
    // TODO Auto-generated method stub
}
/**
 * This method will populate the data
 * @param records
 */
public void setData(List<ScreenGridRecord> records) {
    clearData();
    for (ScreenGridRecord screenGridRecord : records) {
        addData(screenGridRecord);
    }
}

@Override
public void setData() {
}   

}

Thanks @kimi ,i am adding a new row in list 
grid by listgrid.startEditingNew(); in newly added row i am inserting new data.Now i want to save the data @ server side .I also used listgrid.saveAllEdits(); but it is not working .            

Answer 1

首先，您的ListGrid在提供的代码中没有DataSource。ListGrid需要一个数据源作为数据绑定。

从用户界面的角度来看，代码应该是功能性的，因为ListGrid的数据源实现了所需的操作(add, fetch, update, remove)。我猜你没有正确设置数据源