右键单击网格行

发布于 2024-08-27 01:10:59 字数 62 浏览 4 评论 0原文

问题是，每当右键单击网格的行时，所选项目为空。右键单击任何行时如何选择网格的行？

谢谢贾马尔

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你是暖光i 2024-09-03 01:10:59

我认为解决方案可能有问题。每次加载一行时，它都会添加一个事件处理程序，因此，如果该行被重复使用，它会累积事件处理程序。我建议在卸载行时删除事件处理程序。这是我建议的代码：

private void dg_LoadingRow(object sender, DataGridRowEventArgs e)
{
    e.Row.MouseRightButtonDown += new MouseButtonEventHandler(Row_MouseRightButtonDown);
}
void Row_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
    dg.SelectedItem = ((sender) as DataGridRow).DataContext;
}
// new portion
private void dg_UnloadingRow(object sender, DataGridRowEventArgs e)
{
    e.Row.MouseRightButtonDown -= new MouseButtonEventHandler(Row_MouseRightButtonDown);
}

I think the solution may have a problem. Every time a row is loaded it will add an event handler, so if the row is ever reused it can accumulate event handlers. I would recommend removing the event handler when the row is unloaded. Here's my suggested code:

private void dg_LoadingRow(object sender, DataGridRowEventArgs e)
{
    e.Row.MouseRightButtonDown += new MouseButtonEventHandler(Row_MouseRightButtonDown);
}
void Row_MouseRightButtonDown(object sender, MouseButtonEventArgs e)
{
    dg.SelectedItem = ((sender) as DataGridRow).DataContext;
}
// new portion
private void dg_UnloadingRow(object sender, DataGridRowEventArgs e)
{
    e.Row.MouseRightButtonDown -= new MouseButtonEventHandler(Row_MouseRightButtonDown);
}

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