求一个免费的画折线图的控件

[weiyulin510037]

求推荐一个免费的画折线图的控件 或破解版的

要求有下载地址 和 使用说明


谢谢了,大家新年快乐

[threenewbee]

不要什么下载地址，也不要什么说明，vs自带的mschart就可以。

[threenewbee]

另外，自己写一个也没多难。我就写了一个

    class CFXChart
    {
        public class DataPoint
        {
            public DateTime sj { get; set; }
            public int value { get; set; }
        }

        public class DrawItem
        {
            public string Title { get; set; }
            public Color Color { get; set; }
            public int Max { get; set; }
            public int Min { get; set; }
            public List<DataPoint> DataPoints { get; set; }
            public DrawItem(string title, Color color, IEnumerable<DataPoint> datapoints)
            {
                Title = title;
                Color = color;
                DataPoints = datapoints.ToList();
                Max = DataPoints.Select(x => x.value).Max();
                Min = DataPoints.Select(x => x.value).Min();
                int newMax = (Max - Min) / 10;
                int newMin = -(Max - Min) / 10;
                if (newMax < 2) newMax = 2;
                if (newMin > -2) newMin = -2;
                Max += newMax;
                Min += newMin;
            }
        }

        public List<DrawItem> DrawItems { get; set; }

        public int Width { get; set; }

        public int Height { get; set; }

        public CFXChart(int width, int height, params DrawItem[] data)
        {
            Width = width;
            Height = height;
            DrawItems = new List<DrawItem>();
            foreach (var item in data) 
                DrawItems.Add(item);
        }

        private void FillBlank(Graphics g)
        {
            g.Clear(Color.White);
        }

        private void DrawTitle(Graphics g, string title)
        {
            var titlesize = g.MeasureString(title, new Font("宋体", 14));
            g.DrawString(title, new Font("宋体", 14), Brushes.Black, new PointF((float)((Width - titlesize.Width) / 2.0), (float)(Height * 0.06)));
        }

        private void DrawBody(Graphics g, RectangleF rect, DateTime dt1, DateTime dt2)
        {
            g.DrawRectangle(Pens.Black, rect.X+40.0f, rect.Y, rect.Width-40.0f, rect.Height-40.0f);
            float x = rect.X;
            float y = rect.Y;
            int n = 15 / this.DrawItems.Count;
            if (n <= 1) n = 2;
            for (int i = 0; i <= n; i++)
            {
                y = rect.Y + i * (rect.Height - 40.0f) / (float)n;
                if (i != n && i != 0) 
                    g.DrawLine(new Pen(Color.Gray, 0.5f), new PointF(rect.X + 40.0f, y), new PointF(rect.X + rect.Width, y));
                foreach (var item in this.DrawItems)
                {
                    g.DrawString(((item.Max - item.Min) * (1 - i / (float)n) + item.Min).ToString("0.00"), new Font("宋体", 8), new SolidBrush(item.Color), new PointF(x, y - 5.0f));
                    y += 10.0f;
                }
            }
            g.DrawLine(new Pen(Color.Black, 2.0f), new PointF(rect.X + 40.0f, ywarn), new PointF(rect.X + rect.Width, ywarn));
            n = 8;
            for (int i = 0; i <= n; i++)
            {
                x = rect.X + 40.0f + i * (rect.Width - 40.0f) / (float)n;
                if (i != n && i != 0)
                    g.DrawLine(new Pen(Color.Gray, 0.5f), new PointF(x, rect.Y), new PointF(x, rect.Y + rect.Height - 40.0f));
                double totals = new TimeSpan(dt2.Ticks - dt1.Ticks).TotalSeconds;
                DateTime tlabel = dt1.AddSeconds(totals / (double)n * (i));
                string timelabel = tlabel.ToString("HH:mm");
                //if (i != 0) 
                    g.DrawString(timelabel, new Font("宋体", 8), Brushes.Black, new PointF(x - 12.0f, y + 5.0f));             
            }

            foreach (var item in this.DrawItems)
            {
                float dv = rect.Top + (item.Max - item.DataPoints[0].value) / (float)(item.Max - item.Min) * (rect.Height - 40.0f);
                float dt = rect.Left + 40.0f + (float)(new TimeSpan(item.DataPoints[0].sj.Ticks - dt1.Ticks).TotalSeconds) / (float)(new TimeSpan(dt2.Ticks - dt1.Ticks).TotalSeconds) * (rect.Width - 40.0f);
                for (int i = 1; i < item.DataPoints.Count; i++)
                {
                    float dv1 = rect.Top + (item.Max - item.DataPoints[i].value) / (float)(item.Max - item.Min) * (rect.Height - 40.0f);
                    float dt11 = rect.Left + 40.0f + (float)(new TimeSpan(item.DataPoints[i].sj.Ticks - dt1.Ticks).TotalSeconds) / (float)(new TimeSpan(dt2.Ticks - dt1.Ticks).TotalSeconds) * (rect.Width - 40.0f);
                    g.DrawLine(new Pen(item.Color, 1.0f), new PointF(dt, dv), new PointF(dt11, dv1));
                    dv = dv1;
                    dt = dt11;
                }
            }
        }

        private void DrawLegend(Graphics g, RectangleF rect)
        {
            float x = rect.X + 10;
            float y = rect.Y + 10;
            foreach (var item in this.DrawItems)
            {
                g.DrawString(item.Title, new Font("宋体", 8), Brushes.Black, new PointF(x, y));
                x += 35.0f;
                g.DrawLine(new Pen(item.Color, 2.0f), new PointF(x, y + 5.0f), new PointF(x + 10.0f, y + 5.0f));
                x += 25.0f;
            }
        }

        public Bitmap MakeChart()
        {
            DateTime mintm = DrawItems.Select(x => x.DataPoints.Select(y => y.sj).Min()).Min();
            DateTime maxtm = DrawItems.Select(x => x.DataPoints.Select(y => y.sj).Max()).Max();
            string titile = string.Format("{0:yyyyMMdd HHmm} - {1:yyyyMMdd HHmm}", mintm, maxtm);
            Bitmap bmp = new Bitmap(Width, Height);
            var g = Graphics.FromImage(bmp);
            FillBlank(g);
            DrawTitle(g, titile);
            RectangleF rectbody = new RectangleF((float)(Width * 0.06), (float)(Height * 0.16), (float)(Width * 0.88), (float)(Height * 0.64));
            DrawBody(g, rectbody, mintm, maxtm);
            RectangleF rectlen = new RectangleF((float)(Width * 0.06), (float)(Height * 0.84), (float)(Width * 0.88), (float)(Height * 0.1));
            DrawLegend(g, rectlen);
            return bmp;
        }
    }

[全栈极简]

https://blog.csdn.net/chinacsharper/article/details/9372377

[娃都会打酱油了]

asp.net?免费的js绘图类库不要太多 http://echarts.baidu.com/echarts2/doc/example.html

[yanyue2004csdn]

那个echart真不错，很漂亮啊。

[stevenjin]

echarts不用收费啊

[以专业开发人员为伍]

echarts 是免费的。

[以专业开发人员为伍]

另外，上面的地址怎么贴的是 echarts2 的地址呢？ http://echarts.baidu.com/ 或者http://echarts.baidu.com/examples/ 不过要说普通”控件“，可能更多地是指封装为一个 VB.NET 或者 WPF 的 Polygen 那样的直接可以拖到设计界面上、直接可以捕获各种事件的控件吧？这还不如直接使用 WPF。Winform基本上是用来做简单的文本框、Grid的。而 WPF 才是做上图系统的工具。

[以专业开发人员为伍]

在 asp.net 中说”控件”，这个现在看起来比较诡异。现在可能遇到这类问题，就会有人问你“你学过 html5、css、前端技术吗？” 因为这类跟 asp.net 真没什么关系。现在 asp.net 不但没有任何企业级控件，普通的控件技术也荡然无存了。这类需要学前端。

[xian_wwq]

OpenFlashChar和ZedGraph均免费

[洞妖洞妖呼叫洞拐]

highcharts

[weiyulin510037]

谢谢了,我确实不是很懂