隐藏ListBox控件垂直滚动条 [英] Hide vertical scroll bar in ListBox control

问题描述

我正在开发，需要一个的ListBox 控件的应用程序。不幸的是，当我在的ListBox 添加过多物品，则会显示一个垂直滚动条。有什么我可以做隐藏由的ListBox 显示垂直滚动条？我可以看到，有一个属性来隐藏水平滚动条但没有属性的垂直滚动条。

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。我只是创建的模板的一个新项目，一个类库用下面的代码使用系统

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，我已经建立了这个项目输出一个新的类库 ClassLibrary1.dll

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

在我的主要项目中，我已经用鼠标右键单击 工具箱 并选择 选择项目... 。点击浏览... 并选择了我最近创建的类库（ClassLibrary1.dll）并点击打开，然后在确定 。因此，我可以有我的自定义的ListBox 它没有垂直滚动条了。

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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