ListView.ItemCheck与.NET中的ListView.ItemChecked [英] ListView.ItemCheck versus ListView.ItemChecked in .NET

问题描述

ListView有什么区别？ ItemCheck 和ListView。 ItemChecked 事件在.NET？

What is the difference between the ListView.ItemCheck and ListView.ItemChecked events in .NET?

推荐答案

ItemCheck 事件被触发当项目的检查状态即将更改时，允许您检查旧值和新值，并且如果需要（通过分配eventargs参数的NewValue属性）来取消更改。检查（或取消选中）完成后， ItemChecked 被触发

The ItemCheck event is triggered when the checked state of an item is about to change, allowing you to examine the old and new value, and to cancel the change if you wish (by assigning the NewValue property of the eventargs parameter). ItemChecked is triggered after the check (or uncheck) is completed.

代码示例：

private void ListView_ItemCheck(object sender, ItemCheckEventArgs e)
{
    // the checked state of an item is about to change
    if (e.NewValue == CheckState.Checked)
    {
        // perform some check if this is allowed, and if not...
        e.NewValue = e.CurrentValue;
    }
}

private void ListView_ItemChecked(object sender, ItemCheckedEventArgs e)
{
    // the checked state of an item has changed
}

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