C#实现WinForm自定义滚动条（转载）

转载自http://www.csharpwin.com/csharpspace/9147r7954.shtml

先来点直观的效果图：

1.制作自定义滚动条,参考http://www.codeproject.com/KB/miscctrl/customscrollbar.aspx

2.用自定义的滚动条遮住datagridview将要显示的滚动条。

3.鼠标控制自定义滚动条。

///<summary>   

    /// 自定义滚动条滚动事件   

    ///</summary>   

    ///<param name="sender"></param>   

    ///<param name="m"></param>

    private void customScrollbar1_Scroll(object sender, EventArgs m)   

    {   

        //算出每一格的高度   

        int int_Hegiht = dgAll.Size.Height / 7;   

        int index = 0;   

        //datagriview将要显示的条数   

        index = customScrollbar1.Value / int_Hegiht;   

        if (index + 7 + 1 == dgAll.Rows.Count)   

        {   

            index = index + 1;   

        }   

        dgAll.FirstDisplayedScrollingRowIndex = index;  //设置第一行显示    

    }   

  

///<summary>   

    /// dgAll滚动条事件   

    ///</summary>   

    ///<param name="sender"></param>   

    ///<param name="e"></param>

    private void dgAll_Scroll(object sender, ScrollEventArgs e)   

    {   

        int intHeight = dgAll.Size.Height / 7;   

        customScrollbar1.Value = dgAll.FirstDisplayedScrollingRowIndex * intHeight;   

    }