2015/01/22

C#.Net Chart 加入捲軸以及讓使用者選取範圍

XML:
namespace Sample
{
    partial class Form1
    {
        /// <summary>
        /// 設計工具所需的變數。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 清除任何使用中的資源。
        /// </summary>
        /// <param name="disposing">如果應該處置 Managed 資源則為 true,否則為 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form 設計工具產生的程式碼

        /// <summary>
        /// 此為設計工具支援所需的方法 - 請勿使用程式碼編輯器
        /// 修改這個方法的內容。
        /// </summary>
        private void InitializeComponent()
        {
            System.Windows.Forms.DataVisualization.Charting.ChartArea chartArea1 = new System.Windows.Forms.DataVisualization.Charting.ChartArea();
            System.Windows.Forms.DataVisualization.Charting.Legend legend1 = new System.Windows.Forms.DataVisualization.Charting.Legend();
            this.chart1 = new System.Windows.Forms.DataVisualization.Charting.Chart();
            ((System.ComponentModel.ISupportInitialize)(this.chart1)).BeginInit();
            this.SuspendLayout();
            // 
            // chart1
            // 
            chartArea1.Name = "ChartArea1";
            this.chart1.ChartAreas.Add(chartArea1);
            legend1.Name = "Legend1";
            this.chart1.Legends.Add(legend1);
            this.chart1.Location = new System.Drawing.Point(3, 4);
            this.chart1.Name = "chart1";
            this.chart1.Size = new System.Drawing.Size(1137, 585);
            this.chart1.TabIndex = 0;
            this.chart1.Text = "chart1";
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(1152, 592);
            this.Controls.Add(this.chart1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.chart1)).EndInit();
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.DataVisualization.Charting.Chart chart1;
    }
}

程式碼:
using System;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;

namespace Sample
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private Series _series = new Series();
       

        private void Form1_Load(object sender, EventArgs e)
        {

            //設定標籤顯示數值
            _series.IsValueShownAsLabel = true;

            //設定每個點的圖示
            _series.MarkerStyle = MarkerStyle.Circle;

            //每個點的大小
            _series.MarkerSize = 6;

            _series.ChartType = SeriesChartType.Line;
            chart1.Series.Add(_series);

            //讓使用者可以選取想看得範圍
            chart1.ChartAreas[0].CursorY.IsUserEnabled = true;
            chart1.ChartAreas[0].CursorY.IsUserSelectionEnabled = true;

            //設定選取捲軸
            chart1.ChartAreas[0].CursorX.AutoScroll = true;
            chart1.ChartAreas[0].AxisX.ScaleView.Zoomable = true;
            chart1.ChartAreas[0].AxisX.ScrollBar.ButtonStyle = ScrollBarButtonStyles.SmallScroll;
            chart1.ChartAreas[0].AxisX.ScaleView.Zoom(0, 30);

            Parallel.For(0, 1025, index =>
            {
                _series.Points.AddY(Math.Round(Math.Log(Math.Pow(index + 1, 2), 4.5), 3));
            });
 
              
        }

    }
}


執行結果:

加入捲軸樣式:

使用者選取範圍:


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