即使存在有效数据源，Datagridview 行计数也显示为 0 [英] Datagridview rowcount showing 0 even when there is a valid datasource

问题描述

我有一个动态创建的 DataGridView，它有一个有效的 DataSource，其中有一行绑定到它.但是，当我在 DataGridView 上进行行计数时，它返回 0.

I have a dynamically created DataGridView that has a valid DataSource with one row bound to it. However, it is returning me 0 when I am doing a rowcount on the DataGridView.

dgResult.DataSource = resultDt; // a datatable containing one row
flowLayoutPanel.Controls.Add(dgResult); 
int rows = dgResult.Rows.Count; // returning 0 always!

有人可以告诉我这里哪里出错了吗?

Can someone please tell me where I may be going wrong here?

推荐答案

我发现了这个问题.我在未选择的选项卡式页面中显示网格.除非网格可见，否则它不会引发 rowAdded 事件(这很奇怪！) durnig 数据绑定.我在进行数据绑定之前选择了标签页，并且行数起作用了.

I found the issue. I was displaying the grid in a tabbed page that was not selected. Unless the grid is visible, it does not raise the rowadded event (which is weird!) durnig databinding. I selected the tab page before doing the databind, and the rowcount worked.

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