CODEWITHSUNDEEP
c#winformsscrolllabel
Jessica Lopez
Jessica Lopez

Reputation: 49

Label Scroll effect

Im using a Label where text input from a text box is shown in that label. Now, I whant to make the label text scroll. I´ve looked around through the internet and I tried to write this into the code inside of the label:

private void label1_Click(object sender, EventArgs e)
{
    int Scroll;
    string strString = "This is scrollable text...This is scrollable text...This is scrollable text";

    Scroll = Scroll + 1;
    int iLmt = strString.Length - Scroll;
    if (iLmt < 20)
    {
        Scroll = 0;
    }
    string str = strString.Substring(Scroll, 20);
    label1.Text = str;
}

Does anybody see what Im doing wrong?

Upvotes: 4

Views: 18736

Answers (3)

Soroush Falahati
Soroush Falahati

Reputation: 2337

This is possible using my library.

WinForm Animation Library [.Net3.5+]

A simple library for animating controls/values in .Net WinForm (.Net 3.5 and later). Key frame (Path) based and fully customizable.

https://falahati.github.io/WinFormAnimation/

    var textToScroll = "Lorem Ipsum is simply dummy text of the printing and typesetting industry.";
    var durationOfAnimation = 5000ul;
    var maxLabelChars = 20;
    var label = label1;

    new Animator(new Path(0, 100, durationOfAnimation))
    {
        Repeat = true,
        ReverseRepeat = true
    }.Play(
        new SafeInvoker<float>(f =>
        {
            label.Text =
                textToScroll.Substring(
                    (int) Math.Max(Math.Ceiling((textToScroll.Length - maxLabelChars)/100f * f) - 1, 0),
                    maxLabelChars);
        }, label));

Upvotes: 0

user4240660
user4240660

Reputation: 61

//much easier:

private void timer2scroll_Tick(object sender, EventArgs e)
{
  label10Info.Text = label10Info.Text.Substring(1, label10Info.Text.Length - 1) + label10Info.Text.Substring(0,1);
}

Upvotes: 6

Decker97
Decker97

Reputation: 1653

You need to declare the Scroll variable outside of you function call, it is reset every time you click it.

Here it the code with a timer on the form load to auto scroll the text:

private Timer tmr;
private int scrll { get; set; }

void Form1_Load(object sender, EventArgs e)
{
    tmr = new Timer();
    tmr.Tick += new EventHandler(this.TimerTick);
    tmr.Interval = 200;
    tmr.Start();
}

private void TimerTick(object sender, EventArgs e)
{
    ScrollLabel();
}

private void ScrollLabel()
{
    string strString = "This is scrollable text...This is scrollable text...This is scrollable text";

    scrll = scrll + 1;
    int iLmt = strString.Length - scrll;
    if (iLmt < 20)
    {
        scrll = 0;
    }
    string str = strString.Substring(scrll, 20);
    label1.Text = str;
}

private void label1_Click(object sender, EventArgs e)
{
    ScrollLabel();
}

Upvotes: 2

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