Winform实现滚动字幕

void timer1_Tick(object sender, EventArgs e) {

//创建滚动内容

string strNull = " "; //占位空格

string title = "qwerryyiiupoashdjkglhotiehjscxkdjkfjvnfjdjhwshsueifj"; //读取

for (int i = 0; i < this.lblNews.Width / 10; i++)

{

strNull += " ";

}

title = strNull + title;
//实现滚动效果

if (title.Length >= a)

{

this.lblNews.Caption = title.Substring(a, title.Length - a);

a++;

}

else

{

a = 0;

}

}

****************************************************************************************************

privatevoid
timer1_Tick(object sender, EventArgs e)//用Timer来控制滚动速度

{

label1.Left -=2;//设置label1左边缘与其容器的工作区左边缘之间的距离

if
(label1.Right <0)//当label1右边缘与其容器的工作区左边缘之间的距离小于0时

{

label1.Left =this.Width;//设置label1左边缘与其容器的工作区左边缘之间的距离为该窗体的宽度

}

}

privatevoid
button1_Click(object sender, EventArgs e)

{

timer1.Enabled =true;//开始滚动

}

privatevoid
button2_Click(object sender, EventArgs e)

{

timer1.Enabled =false;//停止滚动

}

privatevoid
button3_Click(object sender, EventArgs e)

{

this.Close();//关闭窗体

}

***************************************************************************************************************************************************

写了个winform滚动字幕的（可以由下往上滚，由左往右滚，由右往左滚（其中可以慢慢的滚，类似LED滚动屏幕））

写了一个类以便调用

public class LableMgr

{

int roll_speed = 10; // 间隔(毫秒)

int roll_step = 24; //(左滚) 步长

int roll_topstep = 10; // （上滚）步长

Font roll_font = new Font("黑体", 38, FontStyle.Bold);//字体

Color roll_color = Color.Red;//字颜色

int roll_left;//字距左边的距离

int roll_top;//字距上方的距离

Timer t_roll = new Timer();

Size roll_TxtSize = Size.Empty;//字大小

string roll_Text = null;//字内容

Label labl = new Label();

Image RollBackground = Image.FromFile(string.Format(@"{0}/Top.jpg", Application.StartupPath));

string rolltype;//滚动方式

Timer t_next = new Timer();//滚动间隔

int next_time = 3000;//间隔时间

string[] rollTxts;//滚动内容

int roll_index = 0;//索引

int ROLL_SPLIT = 10;//距下次距离

Graphics GhF = null;

public LableMgr(Label lb, string[] rollText, Graphics Gh, string rollType)

{

this.GhF = Gh;

this.labl = lb;

this.rolltype = rollType;

this.rollTxts = rollText;

switch (rolltype)

{

case "leftlong":

InitRoll(rollText[roll_index]);

break;

case "right":

InitRoll(rollText[roll_index]);

break;

case "top":

InitRoll(rollText[roll_index]);

break;

case "leftstep":

InitLeftRoll(rollText);

break;

default:

InitRoll(rollText[roll_index]);

break;

}

}

private void InitLeftRoll(string[] content)

{

for (int i = 0; i < content.Length; i++)

{

roll_Text += content[i] + " ";

}

roll_left = RollBackground.Width;

t_roll.Start();

t_roll.Interval = 2;

t_roll.Tick += new EventHandler(t_roll_Tick);

}

private void InitRoll(string rollText)

{

switch (rolltype)

{

case "leftlong":

roll_left = RollBackground.Width;

break;

case "right":

roll_left = 0;

break;

}

roll_top = RollBackground.Height;

roll_Text = rollText;

//启动

t_roll.Interval = roll_speed;

t_roll.Tick += new EventHandler(t_roll_Tick);

t_roll.Start();

t_next.Interval = next_time;

t_next.Tick += new EventHandler(t_next_Tick);

t_next.Start();

}

void t_next_Tick(object sender, EventArgs e)

{

switch (rolltype)

{

case "leftlong":

this.roll_left = RollBackground.Width;

roll_index++;

if (roll_index == rollTxts.Count())

{

roll_index = 0;

}

this.roll_Text = this.rollTxts[roll_index];

break;

case "leftstep":

this.roll_left = RollBackground.Width;

break;

case "right":

this.roll_left = 0;

roll_index++;

if (roll_index == rollTxts.Count())

{

roll_index = 0;

}

this.roll_Text = this.rollTxts[roll_index];

break;

case "top":

this.roll_top = RollBackground.Height;

roll_index++;

if (roll_index == rollTxts.Count())

{

roll_index = 0;

}

this.roll_Text = this.rollTxts[roll_index];

break;

}

this.t_roll.Start();

}

void t_roll_Tick(object sender, EventArgs e)

{

switch (rolltype)

{

case "top":

roll_top -= roll_topstep;//移动一个步长

if (roll_top <= 0)//如果移动到顶部

{

roll_top = 0;

this.DrawRoll();

t_roll.Stop();

}

break;

case "leftlong":

roll_left -= roll_step;//移动一个步长

if (roll_left <= 0)//如果移动到最左侧

{

roll_left = 0;

this.DrawRoll();

}

break;

case "leftstep":

roll_left -= 2;

Size proposedSize = new Size(int.MaxValue, int.MaxValue);

int roltext = TextRenderer.MeasureText(roll_Text, roll_font, proposedSize, TextFormatFlags.ModifyString).Width;//字符串长度

int nextroll = ROLL_SPLIT + roltext + RollBackground.Width;

if (roll_left <= (-TextRenderer.MeasureText(roll_Text, roll_font).Width - ROLL_SPLIT))

{

roll_left = 0;

this.DrawRoll();

}

break;

case "right":

roll_left += roll_step;//移动一个步长

Size pSize = new Size(int.MaxValue, int.MaxValue);

if (roll_left >= Convert.ToInt32(RollBackground.Width - TextRenderer.MeasureText(roll_Text, roll_font, pSize, TextFormatFlags.ModifyString).Width * 0.75))//如果移动到最右侧

{

roll_left = Convert.ToInt32(RollBackground.Width - TextRenderer.MeasureText(roll_Text, roll_font, pSize, TextFormatFlags.ModifyString).Width * 0.75);

this.DrawRoll();

t_roll.Stop();

}

break;

}

this.DrawRoll();

}

private void DrawRoll()

{

Image bt = RollBackground.Clone() as Image;

Graphics gh = Graphics.FromImage(bt);

gh.Clear(Color.Black);

switch (rolltype)

{

case "top":

gh.DrawString(roll_Text, roll_font, new SolidBrush(roll_color), 0, roll_top + 20);

break;

case "leftlong":

gh.DrawString(roll_Text, roll_font, new SolidBrush(roll_color), roll_left, RollBackground.Height / 3);

break;

case "leftstep":

gh.DrawString(roll_Text, roll_font, new SolidBrush(roll_color), roll_left, RollBackground.Height / 3);

gh.DrawString(roll_Text, roll_font, new SolidBrush(roll_color), roll_left + TextRenderer.MeasureText(roll_Text, roll_font).Width + ROLL_SPLIT, RollBackground.Height / 3);

break;

case "right":

gh.DrawString(roll_Text, roll_font, new SolidBrush(roll_color), roll_left, RollBackground.Height / 3);

break;

}

DrawOnForm(bt, 0, 0, RollBackground.Width, RollBackground.Height);

if (DateTime.Now.TimeOfDay.TotalMinutes % 5 == 0)

GC.Collect();

}

protected void DrawOnForm(Image img, int x, int y, int width, int height)

{

GhF.DrawImage(img, x, y, width, height);

}

}

前台调用时只需

Graphics GhForm = this.CreateGraphics();

string[] conte = new string[] {"发放额阿文网网服务发豆腐干地方!","麦当劳全份额发发送是面升级了!", "新打额钻石小鸟开!", "12378901234567!" };//要滚动的内容

Form fo = new Form();

Label lb = new Label();

string rolltype = "right";//滚动方式

LableMgr lmg = new LableMgr(lb, conte, GhForm, rolltype);

*************************************************************************************************************************************************************

PointF p;
Font ft = new Font("宋体", 10);
string temp, text;
/// <summary>
/// 滚动显示信息
/// </summary>
/// <param name="obj"></param>
private void ShowText()
{
Brush brush = Brushes.Blue;
text = "滚动字幕";//滚动字幕内容
Graphics g = this.lblShowText.CreateGraphics();
SizeF s = new SizeF();
s = g.MeasureString(text, ft);//测量文字长度
g.Clear(BackColor);//清除背景
if (temp != text)//文字改变时,重新显示
{
p = new PointF(this.lblShowText.Size.Width, 0);
temp = text;
}
else
p = new PointF(p.X - 10, 0);//每次偏移10
if (p.X <= -s.Width)
p = new PointF(this.lblShowText.Size.Width, 0);
g.DrawString(text, ft, brush, p);
}
将此方法放入timer控件事件中即可