c# - 如何连续自动滚动单行文本框？

Question

TextBox我需要写一些东西来连续自动滚动一行文本。我是否需要滚动到插入符号然后将其设置为第一个字符并重新开始？

Answer 1

所以我找到了一个选框控件并对其进行了一些修改并使用它而不是文本框

public class Marquee : System.Windows.Forms.UserControl
{
    private System.ComponentModel.IContainer components;
    private System.Windows.Forms.Timer timer1;

    private int currentPos = 0;
    private bool mBorder;
    private string mText;

    public string MarqueeText
    {
        get { return mText; }
        set { mText = value; }
    }

    public bool Border
    {
        get { return mBorder; }
        set { mBorder = value; }
    }

    public int Interval
    {
        get { return timer1.Interval * 10; }
        set { timer1.Interval = value / 10; }
    }


    public Marquee()
    {
        // This call is required by the Windows.Forms Form Designer.
        InitializeComponent();

        // TODO: Add any initialization after the InitForm call
        this.Size = new Size(this.Width, this.Font.Height);
    }

    /// <summary>
    /// Clean up any resources being used.
    /// </summary>
    protected override void Dispose(bool disposing)
    {
        if (disposing)
        {
            if (components != null)
                components.Dispose();
        }
        base.Dispose(disposing);
    }

    #region Component Designer generated code
    /// <summary>
    /// Required method for Designer support - do not modify 
    /// the contents of this method with the code editor.
    /// </summary>
    private void InitializeComponent()
    {
        this.components = new System.ComponentModel.Container();
        this.timer1 = new System.Windows.Forms.Timer(this.components);
        // 
        // timer1
        // 
        this.timer1.Enabled = true;
        this.timer1.Interval = 1000;
        this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
        // 
        // Marquee
        // 
        this.Name = "Marquee";
        this.Size = new System.Drawing.Size(150, 136);
        this.Resize += new System.EventHandler(this.Marquee_Resize);

    }
    #endregion

    private void Marquee_Resize(object sender, System.EventArgs e)
    {
        this.Height = this.Font.Height;
    }

    private void timer1_Tick(object sender, System.EventArgs e)
    {
        this.Invalidate();
    }

    protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
    {

        if (mBorder)
        {
            e.Graphics.DrawRectangle(new Pen(this.ForeColor), 0, 0, this.Width - 1, this.Height - 1);
        }

        float dif = e.Graphics.MeasureString(mText, this.Font).Width- this.Width;
        if (this.Width < e.Graphics.MeasureString(mText, this.Font).Width)
        {
            e.Graphics.DrawString(mText, this.Font, new SolidBrush(this.ForeColor),
                currentPos, 0);
            e.Graphics.DrawString(mText, this.Font, new SolidBrush(this.ForeColor),
                this.Width + currentPos + dif, 0);

            currentPos--;

            if ((currentPos < 0) && (Math.Abs(currentPos) >= e.Graphics.MeasureString(mText, this.Font).Width))
                currentPos = this.Width + currentPos;
        }
        else 
        {
            e.Graphics.DrawString(mText, this.Font, new SolidBrush(this.ForeColor),-dif/2, 0);
        }

    }
}

因此，如果文本宽度大于控件的宽度，则文本将是静态的，否则文本将自动滚动