GWT Datagrid不显示数据，但包含它 [英] GWT Datagrid does not show data , but contains it

问题描述

我正在尝试将 cellTable 转换为 datagrid ，因为我想稍后添加一个搜索处理程序因此我需要固定的列标题。目前，我扩展了 celltable / datagrid 类，并将小部件放入 simplelayoutpanel 并将其添加到我的 tabpanel 中。

I'm trying to convert a cellTable into adatagrid, because I want to add a search handler later and therefor I need fixed column headers. At the moment I extend the celltable/datagrid class and put the widget into a simplelayoutpanel and add this to my tabpanel.

如果我使用 celltable ，一切正常，数据显示。如果我将类的类型更改为 datagrid ，则数据有时会显示（列名始终位于此处）。要在表中添加一些东西，我使用 setRowData 或$ code> dataProvider 。如果我设置了断点来延迟加载表内容，表有时会包含数据。如果我以后调用表的重绘方法，表格显示正确的信息。但表应该自动加载内容。在我的项目的其他位置，我也使用datagrid，它在对话框中工作。

If I use the celltable, all works fine and the data shows up. If I change the type of the class to datagrid, the data shows sometimes up (The column names are always there). To add something to the table I used setRowData or a dataProvider. If I set breakpoints to delay the loading of the table content, the table does sometimes contain data. If I later call the redraw method for the table, the table shows the correct information. But the table should load automatically the content. At other "positions" of my project I used the datagrid also and it worked in Dialogboxes.

我认为必须是项目绘图的错误，因为如果我在表上或不推荐的 .getDisplayedItems .getRowCount >，它返回我正确数量的项目应该在表中。另外，如果我向表格添加选择模型并选择一个项目，则该项目包含有效数据。

I think there must be a bug with the drawing of the items, because if I call .getRowCount on the table or the deprecated .getDisplayedItems, it returns me the correct number of items which should be in the table. Also if I add a selection model to the table and select a item, the item contains valid data.

推荐答案

DataGrid需要放在一个LayoutPanel或Panel中实现ProvideResize接口可见。 ScrollPanel实现该接口。

DataGrid requires to be put in a LayoutPanel or Panel that implements the ProvidesResize interface to be visible. ScrollPanel implements that interface.

此外，您从DataGrid到您的根元素/面板的LayoutPanels链条必须是不间断的。在面板层次结构中似乎是这样。

Furthermore this chain of LayoutPanels from your DataGrid up to your root element/panel has to be unbroken. That seems to be the case in your panel hierarchy.

最后，您必须使用RootLayoutPanel而不是RootPanel来添加您的LayoutPanels。
那么你确定你将SimpleLayoutPanel添加到RootLayoutPanel？

Finally you have to use the RootLayoutPanel instead of the RootPanel to add your LayoutPanels. So did you make sure that you add your SimpleLayoutPanel to the RootLayoutPanel ?

另请参考这个
GWT：DataGrid - 设置高度100％无法正常呈现

这篇关于GWT Datagrid不显示数据，但包含它的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！