dev图表控件

happy9909 2016-02-26 10:17:02

谁用过dev的图标控件？
demo里面的这个效果怎么实现？就是X轴可以通过鼠标齿轮滚动，自动伸缩。
就这么多分了，请用过dev控件的朋友指点一下。

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江南小鱼 2016-03-01

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引用 10 楼 happy9909 的回复:

@西门吹灯感谢回复！不过上面代码，显示同一天的时候，会有问题。上面的代码，改成：

DataTable CreateData(int rows)
        {
            Random _r = new Random();

            DataTable dt = new DataTable();
            dt.Columns.Add("Arg", typeof(DateTime));
            dt.Columns.Add("Value", typeof(int));
            DateTime now = DateTime.Now;
            for (int i = 0; i < rows; i++)
            {
                dt.Rows.Add(now.AddHours(i), _r.Next(50));
            }

            return dt;
        }

确实，估计是dev图表控件的bug~

happy9909 2016-03-01

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@西门吹灯感谢回复！不过上面代码，显示同一天的时候，会有问题。上面的代码，改成：

DataTable CreateData(int rows)
        {
            Random _r = new Random();

            DataTable dt = new DataTable();
            dt.Columns.Add("Arg", typeof(DateTime));
            dt.Columns.Add("Value", typeof(int));
            DateTime now = DateTime.Now;
            for (int i = 0; i < rows; i++)
            {
                dt.Rows.Add(now.AddHours(i), _r.Next(50));
            }

            return dt;
        }

江南小鱼 2016-03-01

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using System;
using System.Collections.Generic;
using System.Linq;
using DevExpress.XtraEditors;
using System.Data;
using DevExpress.XtraCharts;

namespace NewProject
{
    public partial class Form1 : XtraForm
    {
        ViewType CurrentViewType = ViewType.Line;

        public Form1()
        {
            InitializeComponent();

            UpdateDataSource();
            InitializeChartControl();
        }

        DataTable CreateData(int rows)
        {
            Random _r = new Random();

            DataTable dt = new DataTable();
            dt.Columns.Add("Arg", typeof(DateTime));
            dt.Columns.Add("Value", typeof(int));

            DateTime now = DateTime.Now;
            for (int i = 0; i < rows; i++)
            {
                dt.Rows.Add(now.AddMinutes(i), _r.Next(50));
            }

            return dt;
        }

        private void InitializeChartControl()
        {
            chartControl1.Series.Clear();
            chartControl1.Series.Add("MainSeries", CurrentViewType);

            chartControl1.Series[0].ValueDataMembers.AddRange(new string[] { "Value" });
            chartControl1.Series[0].ArgumentDataMember = "Arg";
            chartControl1.Series[0].ArgumentScaleType = ScaleType.Qualitative;
            
            XYDiagram diagram = (XYDiagram)chartControl1.Diagram;
            diagram.AxisX.DateTimeOptions.Format = DateTimeFormat.Custom;

            diagram.EnableAxisXZooming = true;
            diagram.EnableAxisXScrolling = true;
            
            CustomizeLabels(chartControl1);
            chartControl1.Zoom += chartControl1_Zoom;
        }

        void chartControl1_Zoom(object sender, ChartZoomEventArgs e)
        {
            ChartControl chartControl = (ChartControl)sender;
            CustomizeLabels(chartControl);
        }

        private void UpdateDataSource()
        {
            chartControl1.DataSource = CreateData(700);
        }

        private void CustomizeLabels(ChartControl chartControl)
        {
            XYDiagram diagram = (XYDiagram)chartControl.Diagram;

            double max = diagram.AxisX.Range.MaxValueInternal;
            double min = diagram.AxisX.Range.MinValueInternal;
            diagram.AxisX.CustomLabels.Clear();

            Series AvgSeries = new Series("AvgSeries", CurrentViewType);
            SeriesPoint point = null;
            
            for (int i = 0; i < chartControl.Series[0].Points.Count; i++)
            {
                if (i % Math.Round((max - min) / 7) == 0)
                {
                    DateTime dataArg = chartControl.Series[0].Points[i].DateTimeArgument;
                    diagram.AxisX.CustomLabels.Add(new CustomAxisLabel(dataArg.ToString("yyyy-MM-dd HH:mm"), dataArg));

                    point = new SeriesPoint(dataArg, 10);
                    AvgSeries.Label.Visible = false;
                    AvgSeries.Points.Add(point);
                }
            }
            if (chartControl1.Series.Count == 1)
            {
                chartControl1.Series.Add(AvgSeries);
            }
        }
    }
}

1、同一天显示也是OK的 2、建议放弃这种实现方式，这种是通过滚动鼠标齿轮，动态重绘X轴坐标点，数据量在几百就会出现特别卡的的现象 3、diagram.AxisX.Range.MaxValueInternal在滚动过齿轮、窗体大小发生变化的时候，都会改变。会给再你改变图标数据源的时候，带来一定的麻烦。

足球中国 2016-02-29

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步骤比较多。demo里面有这个滚动的例子。

江南小鱼 2016-02-29

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public ViewType CurrentViewType { get; set; }
        DataTable DataTable;

        public Form1()
        {
            InitializeComponent();

            UpdateDataSource();
            InitializeChartControl();
        }

        DataTable CreateData(int rows)
        {
            Random _r = new Random();

            DataTable dt = new DataTable();
            dt.Columns.Add("Arg", typeof(DateTime));
            dt.Columns.Add("Value", typeof(int));
            for (int i = 0; i < rows; i++)
            {
                dt.Rows.Add(DateTime.Now.AddDays(i), _r.Next(50));
            }

            return dt;
        }

        private void InitializeChartControl()
        {
            CurrentViewType = ViewType.Line;
            chartControl1.Series.Clear();
            int lastSeriesIndex = chartControl1.Series.Add("MainSeries", CurrentViewType);

            chartControl1.Series[lastSeriesIndex].ValueDataMembers.AddRange(new string[] { "Value" });
            chartControl1.Series[lastSeriesIndex].ArgumentDataMember = "Arg";
            chartControl1.Series[lastSeriesIndex].ArgumentScaleType = ScaleType.DateTime;

            XYDiagram diagram = (XYDiagram)chartControl1.Diagram;
            diagram.AxisX.DateTimeOptions.Format = DateTimeFormat.Custom;

            diagram.EnableAxisXZooming = true;
            diagram.EnableAxisXScrolling = true;
            //diagram.AxisX.Range.MaxValue = DateTime.Now.AddDays(50);
            //diagram.AxisX.Range.MinValue = DateTime.Now;
            CustomizeLabels(chartControl1);
            chartControl1.Zoom += chartControl1_Zoom;
        }

        void chartControl1_Zoom(object sender, ChartZoomEventArgs e)
        {
            ChartControl chartControl = (ChartControl)sender;
            CustomizeLabels(chartControl);
        }

        private void UpdateDataSource()
        {
            chartControl1.DataSource = DataTable = CreateData(40);
        }

        private static void CustomizeLabels(ChartControl chartControl)
        {
            XYDiagram diagram = (XYDiagram)chartControl.Diagram;

            double max = diagram.AxisX.Range.MaxValueInternal;
            double min = diagram.AxisX.Range.MinValueInternal;
            diagram.AxisX.CustomLabels.Clear();
            for (int i = 0; i < chartControl.Series[0].Points.Count; i++)
            {
                if (i % Math.Round((max - min) / 7) == 0)
                {
                    DateTime dataArg = chartControl.Series[0].Points[i].DateTimeArgument;
                    diagram.AxisX.CustomLabels.Add(new CustomAxisLabel(dataArg.ToString("yyyy-MM-dd HH:mm"), dataArg));
                }
            }
        }

happy9909 2016-02-29