Winforms-如何防止选择列表框项目 [英] Winforms - How to prevent Listbox item selection

问题描述

在WinForms中，我有时会在选择项目的列表框上运行一个循环.

In WinForms I occationally have a loop running over a Listbox selecting Items.

在那段时间里，我不希望用户使用鼠标或键在该列表框中选择项目.

During that time I don't want the user to select items in that listbox with the mouse or keys.

我查看了MyListbox.enabled = false，但它使所有项目均变灰.不想那样.

I looked at MyListbox.enabled=false but it grays out all items. Dont't want that.

如何防止在列表框中选择项目?

How to prevent selecting items in a Listbox?

推荐答案

我也想要一个只读列表框，最后，经过大量搜索，从http://ajeethtechnotes.blogspot.com/2009/02/readonly-listbox.html :

I too wanted a read only list box, and finally, after much searching, found this from http://ajeethtechnotes.blogspot.com/2009/02/readonly-listbox.html:

public class ReadOnlyListBox : ListBox
{
    private bool _readOnly = false;
    public bool ReadOnly
    {
        get { return _readOnly; }
        set { _readOnly = value; }
    }

    protected override void DefWndProc(ref Message m)
    {
        // If ReadOnly is set to true, then block any messages 
        // to the selection area from the mouse or keyboard. 
        // Let all other messages pass through to the 
        // Windows default implementation of DefWndProc.
        if (!_readOnly || ((m.Msg <= 0x0200 || m.Msg >= 0x020E)
        && (m.Msg <= 0x0100 || m.Msg >= 0x0109)
        && m.Msg != 0x2111
        && m.Msg != 0x87))
        {
            base.DefWndProc(ref m);
        }
    }
}

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