你知道宝马m3c#怎么让textbox里的多行文字实现自动上下滚动播出，谢谢第1个回答:Jjin0012017-11-26TA获得超过5

第1个回答:

Jjin0012017-11-26TA获得超过562个赞关注在窗体上添加txtBox,设置为multiline,添加timer控件,然后:public Form1()        {            InitializeComponent();             this.timer1.Interval = 1000;//以毫秒为单位            this.timer1.Start();        }                // 发送消息         [DllImport("user32.dll", EntryPoint = "SendMessage")]        public static extern int SendMessage(IntPtr hWnd, int wMsg, int wParam, int lParam);        // 获取滚动条位置         [DllImport("user32.dll")]        public static extern int GetScrollPos(IntPtr hWnd, int nBar);        // 设置滚动条位置         [DllImport("user32.dll")]        static extern int SetScrollPos(IntPtr hWnd, int nBar, int nPos, bool bRedraw);        public const int EM_LINESCROLL = 0xb6;        /// <summary>        /// 定时器        /// </summary>        /// <param name="sender">object</param>        /// <param name="e">EventArgs</param>        private void timer1_Tick(object sender, EventArgs e)        {            int i = GetScrollPos(this.txtBoxMultiLine.Handle, 1);            // 向下滚动一行             SendMessage(this.txtBoxMultiLine.Handle, EM_LINESCROLL, 0, 1); // 0，1代表垂直滚动条向下滚动            // 判断是否有位置变化，如果没有则说明到了底部，返回开始处             if (i == GetScrollPos(this.txtBoxMultiLine.Handle, 1))            {                // 回到顶部，这里用SetScrollPos似乎有问题，滚动条和文字不是同步更新                 this.txtBoxMultiLine.SelectionStart = 0;                this.txtBoxMultiLine.SelectionLength = 1;                this.txtBoxMultiLine.ScrollToCaret();                this.txtBoxMultiLine.SelectionLength = 0;            }            Console.WriteLine(i);        }