如何在复选框列表中获取当前的选中项目 [英] How to get current Checked Item in a checkedlistbox

问题描述

我有一个列表框，我试图在ItemCheck Handler中获取当前选中的项目，但是我不能，
->我可以使用属性chckdLstBox_Metabolites.CheckedItems
获取CheckedItems列表。我会得到刚刚检查过的项目吗？？

I have a list box and i am trying to get currently checked item inside ItemCheck Handler , but i couldn't , ->I can get List of CheckedItems using property chckdLstBox_Metabolites.CheckedItems But how do i get the item that is checked just before????

推荐答案

您可以使用事件的ItemCheckEventArgs：

You can use the event's ItemCheckEventArgs:

private void checkedListBox1_ItemCheck(object sender, ItemCheckEventArgs e)
    {
        //Note: MessageBox is for demo use only 
        MessageBox.Show("Selected Index: " + e.Index.ToString());
        MessageBox.Show("Current Value: " + e.CurrentValue.ToString());
        MessageBox.Show("New Value: " + e.NewValue.ToString());
        //Getting the item would be:
        string currentItem = (string)this.checkedListBox1.Items[e.Index];
        MessageBox.Show("Current Item: " + currentItem);
    } 

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