Hi,
I need to draw lines on a web application using Visual Studio 2008 C#. But i could only find drawing lines on a windows application. :sad: Can i convert the codes from windows application to a web application? Below is the code for windows application. I need guidances. Thanks!
using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Data;
using System.Windows.Forms;
namespace nmLineRectangle
{
public class clsLineRectangle
{
Rectangle SelectRect = new Rectangle();
Point ps = new Point();
Point pe = new Point();
public clsLineRectangle()
{
}
public void clsLineRectangle_OnMouseDown(Object sender, MouseEventArgs e)
{
SelectRect.Width = 0;
SelectRect.Height = 0;
SelectRect.X = e.X;
SelectRect.Y = e.Y;
ps.X = e.X;
ps.Y = e.Y;
pe = ps;
}
public void clsLineRectangle_OnMouseMove(Object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
Form thisform = (Form)sender;
// First DrawReversible to toggle to the background color
// Second DrawReversible to toggle to the specified color
if (((RadioButton)thisform.Controls[0]).Checked)
{
ControlPaint.DrawReversibleLine(thisform.PointToScreen(ps), thisform.PointToScreen(pe), Color.Black);
pe = new Point(e.X, e.Y);
ControlPaint.DrawReversibleLine(thisform.PointToScreen(ps), thisform.PointToScreen(pe), Color.Black);
}
else
{
ControlPaint.DrawReversibleFrame(thisform.RectangleToScreen(SelectRect), Color.Black, FrameStyle.Dashed);
SelectRect.Width = e.X - SelectRect.X;
SelectRect.Height = e.Y - SelectRect.Y;
ControlPaint.DrawReversibleFrame(thisform.RectangleToScreen(SelectRect), Color.Black, FrameStyle.Dashed);
}
}
}
public void clsLineRectangle_OnMouseUp(Object sender, MouseEventArgs e)
{
Form thisform = (Form)sender;
Graphics g = thisform.CreateGraphics();
Pen p = new Pen(Color.Blue, 2);
if (((RadioButton)thisform.Controls[0]).Checked)
{
ControlPaint.DrawReversibleLine(thisform.PointToScreen(ps), thisform.PointToScreen(pe), Color.Black);
g.DrawLine(p, ps, pe);
}
else
{
ControlPaint.DrawReversibleFrame(thisform.RectangleToScreen(SelectRect), Color.Black, FrameStyle.Dashed);
g.DrawRectangle(p, SelectRect);
}
g.Dispose();
}
}
public class Form1 : System.Windows.Forms.Form
{
private RadioButton rdoLine;
private RadioButton rdoRect;
[STAThread]
public static void Main()
{
Application.Run(new Form1());
}
public Form1()
{
clsLineRectangle im = new clsLineRectangle();
this.MouseDown += new MouseEventHandler(im.clsLineRectangle_OnMouseDown);
this.MouseMove += new MouseEventHandler(im.clsLineRectangle_OnMouseMove);
this.MouseUp += new MouseEventHandler(im.clsLineRectangle_OnMouseUp);
rdoLine = new RadioButton();
rdoLine.Name = "rdoLine";
rdoLine.Location = new Point(10, 10);
rdoLine.Text = "Line";
rdoRect = new RadioButton();
rdoRect.Name = "rdoRect";
rdoRect.Location = new Point(10, 40);
rdoRect.Text = "Rectangle";
this.Controls.AddRange(new Control[] { rdoLine, rdoRect });
}
private void rdo_OnClick(Object sender, EventArgs e)
{
if (rdoLine.Checked)
{
rdoRect.Checked = true;
rdoLine.Checked = false;
}
else
{
rdoRect.Checked = false;
rdoLine.Checked = true;
}
}
}
}namespace LineAndRect
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form 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.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.Text = "Form1";
}
#endregion
}
}
