huong dan ve do thi voi vc#

Ng ng Hin Hc Vin Hi Qun 2011

1

HNG DN V TH VI

VISUAL STUDIO C# 2008

Hm nay, ngy 05/08/2011 ng l 1 ngy bun nh ch cht ( con ch nh bn cnh

b nu d cy ^_^ ), li ngi vit TUT cho anh em engineer mi vo ngh.

1. Gii thiu

Trong TUT u ti hng dn cc bn giao tip COM vi vi iu khin. Giao

tip nh vy coi nh l xong ri. Nhng m chng ta thy y nhn c d liu

tt ri nhng phi v c Graph th mi gii quyt c bi ton.

Trong 1 ln tnh c thy 1 ng anh v th vi VB6 nhn thy m thm c ngh

ng ny tht l P-r-fc-sn-n. Nhng sau khi tm hiu th ha ra ng ta si

phn mm v teachar g ( hic khng nh! ). Ti mi mon men ln mng tm

cho C# th c cng kh nhiu cng c mnh m cho v th, nhn rt chuyn

nghip c nh l dng Excel v y. K n l c ZedGraph, Component one

Trong khun kh ti liu ny ti s c gng hng dn chi tit v th vi

ZedGraph, tuy khng p v pro bng Component One nhng l cng c mnh v

code nn rt d lm ch code ca mnh.

Hi vng ti liu s gip ch c anh em mi vo ngh chi vi iu khin v tp

code vi C#

2. To Project

- File / New / Project.

- V t tn cho n


2

- s dng c control ZedGraph chng ta phi add n vo Toolbox bng cch

- Hin ra 1 ca s mi v bn phi nhn Brownse ch ra ng dn n

ZedGraph.dll

Nhp phi chut vo

khu vc trng, chn

Choose Items.


3


4

- Khi ToolBox c Control nh bn di l OK ri.

- Sau khi ko th v thm cc button c nh hnh bn di.

- Vy l phn giao din l n ri, by gi ko thm timer ra, mc ch to thi

gian chy trong phn th.

Em n y, ch

vic ko th vo

Form l OK


5

3. Vit CODE

- Trc ht thm th vin vo

// ch : Khai bo th vin ny

using ZedGraph;

- Khai bo trc Form1

// Khai bo 1 bin dng cho timer, chy ct thi gian tnh bng ms

int tickStart = 0;

public Form1()

{

InitializeComponent();

}

- p vo tiu ly s kin Load v xem code Form1_Load bn di.

private void Form1_Load(object sender, EventArgs e)

{

// khi khi ng s c chy

GraphPane myPane = zedGraphControl1.GraphPane; // Khai bo sa

dng Graph loi GraphPane;

// Cc thng tin cho th ca mnh

myPane.Title.Text = "y l title trn cng, bn thay i cho ph

hp vi chng trnh";

myPane.XAxis.Title.Text = "Thi gian ct X";

myPane.YAxis.Title.Text = "Tiu ct Y";

// nh ngha list v th. cc bn hiu r c ch lm

vic y khai bo 2 list im 2 ng th

RollingPointPairList list1 = new RollingPointPairList(1200);

Timer th hin y l c.


6

// y s dng list vi 1200 im (c th thm nhiu liu ti

y)

RollingPointPairList list2 = new RollingPointPairList( 1200 );

// dng di l nh ngha curve v.

LineItem curve1 = myPane.AddCurve("ng 1", list1, Color.Red,

SymbolType.None); // Color mu , c trng cho ng 1

// SymbolType l kiu biu th th : im, ng trn, tam

gic ....

LineItem curve2 = myPane.AddCurve("ng 2", list2, Color.Blue,

SymbolType.None); // Color mu Xanh, c trng cho ng 2

// v d khong cch l 50ms 1 ln

timer1.Interval = 50;

//timer1.Enabled = true; // Kch hot cho timer1

//timer1.Start(); // Chy Timer1

// nh hin th cho trc thi gian (Trc X)

myPane.XAxis.Scale.Min = 0; // Min = 0;

myPane.XAxis.Scale.Max = 30; // M = 30;

myPane.XAxis.Scale.MinorStep = 1; // n v chia nh nht 1

myPane.XAxis.Scale.MajorStep = 5; // n v chia ln 5

// Gi hm xc nh c trc

zedGraphControl1.AxisChange();

// Khi ng timer v v tr ban u

tickStart = Environment.TickCount;

}

// tin cho vic s dng chng ta s xy dng 1 hm draw phc v cho vic

v th

public void draw(double setpoint1, double setpoint2) // v d ny

chng ta c 2 ng

{

if (zedGraphControl1.GraphPane.CurveList.Count


7

if (list1 == null)

return;

if (list2 == null)

return;

// Time c tnh bng ms

double time = (Environment.TickCount - tickStart) / 1000.0;

// Tnh ton gi tr hin th

// Mun hin th ci g th ch vic thay vo setpointx

list1.Add(time, setpoint1); // y chnh l hm hin th d liu

ca mnh ln th

// list2.Add(time, setpoint2); // y chnh l hm hin th d

liu ca mnh ln th

// Ko v setpoint2 m th v th hnh sin vi 3 seconds per

cycle

list2.Add(time, Math.Sin(2.0 * Math.PI * time / 3.0));

// on chng trnh thc hin v th

Scale xScale = zedGraphControl1.GraphPane.XAxis.Scale;

if (time > xScale.Max - xScale.MajorStep)

{

//xScale.Max = time + xScale.MajorStep;

// xScale.Min = xScale.Max - 30.0; // Timer chy qua 30 s t

ng dch chuyn tnh tin sang tri

// Nu ko mun dch chuyn m chy bt u t 0 th :

xScale.Min = 0;

if (button3.Text == "COMPACT")

{

xScale.Max = time + xScale.MajorStep;

xScale.Min = xScale.Max - 30.0;

}

else

{


xScale.Min = 0;

}

}

// V th


// Force a redraw

zedGraphControl1.Invalidate();

}

gi hm v chng ta s kch hot cho Timer1 chy, p vo Timer1 ly s kin,

sau vit code nh code tham kho bn di.

private void timer1_Tick(object sender, EventArgs e)

{

draw(5,20);

}


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- cc bn hiu hn v c ch lm vic, ti thm cc Button iu khin mc

ch ca n l : Cho m Timer bt u v th bng START, cho hin th 2

dng chy thi gian bng button COMPACT v thot chng trnh bng Exit

Cc bn c th tham kho code mu.

int check = 0; // cho khi nhn Start l s bt u t im 0

private void button1_Click(object sender, EventArgs e)

{

if (button1.Text == "START")

{

timer1.Enabled = true;

button1.Text = "STOP";


if (check == 0)

{


check = 1;

}

}

else

{

timer1.Enabled = false;

button1.Text = "START";

}

}


{

this.Close();

}


{

if (button3.Text == "COMPACT") button3.Text = "SROLL";

else button3.Text = "COMPACT";

}

private void tcGiToolStripMenuItem_Click(object sender, EventArgs e)

{

Form2 frm = new Form2();

frm.ShowDialog();

}

4. Full CODE tham kho

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;


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// ch : Khai bo th vin ny

using ZedGraph;

namespace DOTHI_HIENCLUBVN

{

public partial class Form1 : Form

{

// Khai bo 1 bin dng cho timer, chy ct thi gian tnh bng ms

int tickStart = 0;

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

// khi khi ng s c chy

GraphPane myPane = zedGraphControl1.GraphPane; // Khai bo sa

dng Graph loi GraphPane;

// Cc thng tin cho th ca mnh

myPane.Title.Text = "y l title trn cng, bn thay i cho ph

hp vi chng trnh";

myPane.XAxis.Title.Text = "Thi gian ct X";

myPane.YAxis.Title.Text = "Tiu ct Y";

// nh ngha list v th. cc bn hiu r c ch lm

vic y khai bo 2 list im 2 ng th

RollingPointPairList list1 = new RollingPointPairList(1200);

// y s dng list vi 1200 im (c th thm nhiu liu ti

y)

RollingPointPairList list2 = new RollingPointPairList( 1200 );

// dng di l nh ngha curve v.

LineItem curve1 = myPane.AddCurve("ng 1", list1, Color.Red,

SymbolType.None); // Color mu , c trng cho ng 1

// SymbolType l kiu biu th th : im, ng trn, tam

gic ....

LineItem curve2 = myPane.AddCurve("ng 2", list2, Color.Blue,

SymbolType.None); // Color mu Xanh, c trng cho ng 2

// v d khong cch l 50ms 1 ln

timer1.Interval = 50;

//timer1.Enabled = true; // Kch hot cho timer1

//timer1.Start(); // Chy Timer1

// nh hin th cho trc thi gian (Trc X)

myPane.XAxis.Scale.Min = 0; // Min = 0;

myPane.XAxis.Scale.Max = 30; // M = 30;

myPane.XAxis.Scale.MinorStep = 1; // n v chia nh nht 1

myPane.XAxis.Scale.MajorStep = 5; // n v chia ln 5

// Gi hm xc nh c trc




}


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// tin cho vic s dng chng ta s xy dng 1 hm draw phc v

cho vic v th

public void draw(double setpoint1, double setpoint2) // v d ny

chng ta c 2 ng

{

if (zedGraphControl1.GraphPane.CurveList.Count xScale.Max - xScale.MajorStep)

{

//xScale.Max = time + xScale.MajorStep;

// xScale.Min = xScale.Max - 30.0; // Timer chy qua 30 s t

ng dch chuyn tnh tin sang tri

// Nu ko mun dch chuyn m chy bt u t 0 th :

xScale.Min = 0;

if (button3.Text == "COMPACT")

{


xScale.Min = xScale.Max - 30.0;

}

else

{


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xScale.Min = 0;

}

}

// V th


// Force a redraw

zedGraphControl1.Invalidate();

}

private void timer1_Tick(object sender, EventArgs e)

{

draw(5,20);

}

int check = 0; // cho khi nhn Start l s bt u t im 0


{

if (button1.Text == "START")

{

timer1.Enabled = true;

button1.Text = "STOP";


if (check == 0) { tickStart = Environment.TickCount; check = 1; }

}

else

{

timer1.Enabled = false;

button1.Text = "START";

}

}


{

this.Close();

}


{

if (button3.Text == "COMPACT") button3.Text = "SROLL";

else button3.Text = "COMPACT";

}

private void tcGiToolStripMenuItem_Click(object sender, EventArgs e)

{

Form2 frm = new Form2();

frm.ShowDialog();

}

}

}

5. Mt s hnh nh v giao din


12

Hnh trn l thi gian chy ( th dch tnh tin), hnh bn di bt u t 0 (dn li)

huong dan ve do thi voi vc#

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