比较 DataGridView 单元格中的新旧值 [英] Compare old and new value in DataGridView cell

问题描述

如何根据新单元格值是> 还是<来更改DataGridView 单元格ForeColor比当前/旧单元格值?是否有事件在更改电流之前传递新值，以便我可以比较它们?

How to change DataGridView cell ForeColor based on whether new cell value is > or < than current/old cell value? Is there an event which passes the new value before the current is changed, so I can compare them?

数据从底层源更新，可能被BindingSource绑定.

The data is updated from underlying source, and may be bound by BindingSource.

推荐答案

我遇到了类似的问题.我通过使用 CellValidating 事件来解决这个问题:

I ran into a similar issue. I tackled this by using the CellValidating event instead:

void dgv_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
{
    var oldValue = dgv[e.ColumnIndex, e.RowIndex].Value;
    var newValue = e.FormattedValue;
}

诚然，我只需要访问旧值，我不需要执行任何格式化.不过，我确定您可以通过此事件处理程序应用格式.

Admittedly, I just needed access to the old value, I didn't need to perform any formatting. I'm sure you can apply formatting through this event handler, though.

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