DataGrid自动生成列 控制列头显示
情景:
1. DataGrid的列是自动生成的。
2. DataGrid支持排序。
要求:点击某列的列头时,根据该列对应的字段排序。升序/降序在字段后面加上“向上/向下”箭头。
由于列是自动生成,所以DataGrid.Columns集合为空。无法遍历Columns的HeaderText。
有个办法:在DataBound中绑定行列头时设置单元格中的内容。
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需提醒的是:
可排序列中的列头单元格中的内容是LinkButton类型。对这种列头用e.Item.Cells[0].Text是取不到内容的。
另外:在页面中Page_Load或者其它地方,用DataGrid.Items取到的是DataGrid的普通内容,即行内容,而不包括Header和Footer。