C#制作甘特圖

先自制甘特圖控件：

using System;

using System.Collections.Generic;

using System.Text;

using System.Drawing;

using System.Windows.Forms;

using System.Drawing.Drawing2D;

using System.ComponentModel;

namespace GanttControls

{

/// <summary>

/// 甘特圖控件

/// [email protected]

/// qq:116149

/// </summary>

public class ProjectViewBox : UserControl

{

#region 容器

#region 設計器代碼

/// <summary>

/// 必需的設計器變量。

/// </summary>

private System.ComponentModel.IContainer components = null;

/// <summary>

/// 清理所有正在使用的資源。

/// </summary>

/// <param name="disposing">如果應釋放托管資源，為 true；否則為 false。</param>

protected override void Dispose(bool disposing)

{

if (disposing && (components != null))

{

components.Dispose();

}

base.Dispose(disposing);

}

#region 元件設計器生成的代碼

/// <summary>

/// 設計器支援所需的方法 - 不要

/// 使用代碼編輯器修改此方法的内容。

/// </summary>

private void InitializeComponent()

{

this.hScrollBar1 = new System.Windows.Forms.HScrollBar();

this.vScrollBar1 = new System.Windows.Forms.VScrollBar();

this.MainPictureBox = new System.Windows.Forms.PictureBox();

((System.ComponentModel.ISupportInitialize)(this.MainPictureBox)).BeginInit();

this.SuspendLayout();

// hScrollBar1

this.hScrollBar1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left)

| System.Windows.Forms.AnchorStyles.Right)));

this.hScrollBar1.LargeChange = 1;

this.hScrollBar1.Location = new System.Drawing.Point(1, 111);

this.hScrollBar1.Maximum = 60;

this.hScrollBar1.Name = "hScrollBar1";

this.hScrollBar1.Size = new System.Drawing.Size(120, 16);

this.hScrollBar1.TabIndex = 0;

// vScrollBar1

this.vScrollBar1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)

| System.Windows.Forms.AnchorStyles.Right)));

this.vScrollBar1.LargeChange = 1;

this.vScrollBar1.Location = new System.Drawing.Point(121, 0);

this.vScrollBar1.Maximum = 60;

this.vScrollBar1.Name = "vScrollBar1";

this.vScrollBar1.Size = new System.Drawing.Size(16, 111);

this.vScrollBar1.TabIndex = 1;

// MainPictureBox

this.MainPictureBox.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)

| System.Windows.Forms.AnchorStyles.Left)

| System.Windows.Forms.AnchorStyles.Right)));

this.MainPictureBox.Location = new System.Drawing.Point(0, 0);

this.MainPictureBox.Name = "MainPictureBox";

this.MainPictureBox.Size = new System.Drawing.Size(120, 109);

this.MainPictureBox.TabIndex = 2;

this.MainPictureBox.TabStop = false;

// ProjectBox

this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);

this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

this.BackColor = System.Drawing.SystemColors.Control;

this.Controls.Add(this.vScrollBar1);

this.Controls.Add(this.hScrollBar1);

this.Controls.Add(this.MainPictureBox);

this.Name = "ProjectBox";

this.Size = new System.Drawing.Size(139, 129);

this.Load += new System.EventHandler(this.ProjectBox_Load);

this.SizeChanged += new System.EventHandler(this.ProjectBox_SizeChanged);

((System.ComponentModel.ISupportInitialize)(this.MainPictureBox)).EndInit();

this.ResumeLayout(false);

}

#endregion

private System.Windows.Forms.HScrollBar hScrollBar1;

private System.Windows.Forms.VScrollBar vScrollBar1;

private System.Windows.Forms.PictureBox MainPictureBox;

#endregion

public ProjectViewBox()

{

InitializeComponent();

}

#region 私有成員

/// <summary>

/// 最小單元格

/// </summary>

private int m_Size = 18;

/// <summary>

/// 日期索引記錄目前繪制的位置

/// </summary>

private int m_DayIndex = 0;

/// <summary>

/// 開始繪制位置

/// </summary>

private int m_JobIndex = 0;

#endregion

/// <summary>

/// 大小改變

/// </summary>

/// <param name="sender"></param>

/// <param name="e"></param>

private void ProjectBox_SizeChanged(object sender, EventArgs e)

{

if (MainPictureBox.Image != null) PaintProjectImage();

}

private MyScroll Hscroll;

private MyScroll Vscroll;

private void ProjectBox_Load(object sender, EventArgs e)

{

MainPictureBox.Image = new Bitmap(1, 1);

PaintProjectImage();

Hscroll = new MyScroll();

Hscroll.Click += new MyScroll.ScrollClick(Hscroll_Click);

Hscroll.AssignHandle(hScrollBar1.Handle);

Vscroll = new MyScroll();

Vscroll.Click += new MyScroll.ScrollClick(Vscroll_Click);

Vscroll.AssignHandle(vScrollBar1.Handle);

m_ProjectSelect.ProjectBox = this;

}

#region 滾動條

void Vscroll_Click(int p_Value)

{

switch (p_Value)

{

case 0:

m_JobIndex = vScrollBar1.Value;

break;

case 1:

m_JobIndex--;

if (m_JobIndex < 0) m_JobIndex = 0;

break;

case 2:

m_JobIndex++;

break;

}

if (m_JobIndex <= 0) vScrollBar1.Value = 0;

if (m_JobIndex >= 60) vScrollBar1.Value = 60;

PaintProjectImage();

}

void Hscroll_Click(int p_Value)

{

switch (p_Value)

{

case 0:

m_DayIndex = hScrollBar1.Value;

break;

case 1:

m_DayIndex--;

break;

case 2:

m_DayIndex++;

break;

}

if (m_DayIndex <= 0) hScrollBar1.Value = 0;

if (m_DayIndex >= 60) hScrollBar1.Value = 60;

PaintProjectImage();

}

#endregion

/// <summary>

/// 重新整理

/// </summary>

public override void Refresh()

{

PaintProjectImage();

}

/// <summary>

/// 開始繪制

/// </summary>

private void PaintProjectImage()

{

MainPictureBox.Image.Dispose();

if (MainPictureBox.Width == 0 || MainPictureBox.Height == 0) return;

Bitmap _NewBitmap = new Bitmap(MainPictureBox.Width, MainPictureBox.Height);

Graphics _Graphics = Graphics.FromImage(_NewBitmap);

Point _DrawPoint = new Point(0, 0);

DateTime _DrawDate = DateTime.Now.AddDays(m_DayIndex);

while (true)

{

_DrawPoint = GraphicsWeekHead(_Graphics, ref _DrawDate, _DrawPoint);

if (_DrawPoint.X > MainPictureBox.Width) break;

}

DateTime _NodeStarDate = DateTime.Now.AddDays(m_DayIndex);

int _Hight = m_Size * 2;

for (int i = m_JobIndex; i < m_ProjectSelect.Count; i++)

{

m_ProjectSelect[i].GraphisDraw(_Graphics, _NodeStarDate, m_Size, ref _Hight, MainPictureBox.Width, MainPictureBox.Height);

}

MainPictureBox.Image = _NewBitmap;

}

/// <summary>

/// 繪制日期頭和星期幾

/// </summary>

/// <param name="p_Graphics">刷子</param>

/// <param name="p_StarDate">開始日期 ref類型傳回日期的下周一</param>

/// <param name="p_StarPoint">開始位置</param>

/// <returns>結束節點</returns>

private Point GraphicsWeekHead(Graphics p_Graphics, ref DateTime p_StarDate, Point p_StarPoint)

{

int _Date = (int)p_StarDate.DayOfWeek;

if (_Date != 0) p_StarDate = p_StarDate.AddDays(-_Date);

int _DrawDateX = p_StarPoint.X - (_Date * m_Size);

Pen _LinePen = new Pen(Brushes.Black, 1);

Rectangle _RectangleHead = new Rectangle(_DrawDateX, 0, m_Size * 7, m_Size);

StringFormat _StringFormat = new StringFormat();

_StringFormat.LineAlignment = StringAlignment.Far;

p_Graphics.DrawRectangle(_LinePen, _RectangleHead);

p_Graphics.DrawString(p_StarDate.ToString("yyyy年MM月dd日"), this.Font, Brushes.Black, _RectangleHead, _StringFormat);

_RectangleHead = new Rectangle(p_StarPoint.X, m_Size, p_StarPoint.X + m_Size, m_Size);

Rectangle _BlackRect = new Rectangle(0, m_Size * 2, m_Size, this.Height - (m_Size * 2));

Color _BlackColor = m_ProjectSelect.BackColor;

for (int i = _Date; i != 7; i++)

{

string _WeekText = string.Empty;

switch (i)

{

case 0:

_WeekText = "日";

_BlackColor = m_ProjectSelect.WeekBackColor;

break;

case 1:

_WeekText = "一";