问题描述

我正在开发一个需要 ListBox 控件的应用程序.不幸的是，当我在 ListBox 中添加太多项目时，会显示一个垂直滚动条.我可以做些什么来隐藏 ListBox 显示的垂直滚动条吗?我可以看到有一个隐藏水平滚动条的属性，但没有垂直滚动条的属性.

I'm developing an application that requires a ListBox control. Unfortunately, when I add too many items in the ListBox, a vertical scroll bar is shown. Is there something I can do to hide the vertical scroll bar shown by the ListBox? I can see that there's a property to hide the horizontal scroll bar but there's no property for the vertical scroll bar.

推荐答案

问题解决了.我只是使用以下代码创建了一个模板类库的新项目

The problem was solved. I've simply created a new project of template a class library with the following code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace ClassLibrary1
{
    public class MyListBox : System.Windows.Forms.ListBox
    {
        private bool mShowScroll;
        protected override System.Windows.Forms.CreateParams CreateParams
        {
            get
            {
                CreateParams cp = base.CreateParams;
                if (!mShowScroll)
                    cp.Style = cp.Style & ~0x200000;
                return cp;
            }
        }
        public bool ShowScrollbar
        {
            get { return mShowScroll; }
            set
            {
                if (value != mShowScroll)
                {
                    mShowScroll = value;
                    if (IsHandleCreated)
                        RecreateHandle();
                }
            }
        }
    }    
}

然后，我构建了输出新类库的项目ClassLibrary1.dll

Then, I've built the project outputting a new class library ClassLibrary1.dll

在我的主项目中，我右键单击了 ToolBox 并选择了 Choose Items....点击 Browse... 并选择我最近创建的类库 (ClassLibrary1.dll) 并点击 Open 然后点击 OK.因此，我能够拥有不再有垂直滚动条的自定义 ListBox.

On my main project, I've right-clicked the ToolBox and selected Choose Items.... Clicked on Browse... and selected the class library that I've recently created (ClassLibrary1.dll) and clicked on Open then on OK. Thus, I was able to have my custom ListBox which has no vertical scroll bars anymore.

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