MVC图表Y轴自定义

Install-Package System.Web.DataVisualization

@{
    var chart = new System.Web.UI.DataVisualization.Charting.Chart();
    chart.Width = 600;
    chart.Height = 400;

    // 添加数据系列
    var series = new System.Web.UI.DataVisualization.Charting.Series();
    series.ChartType = System.Web.UI.DataVisualization.Charting.SeriesChartType.Line;
    series.MarkerStyle = System.Web.UI.DataVisualization.Charting.MarkerStyle.Circle;
    series.MarkerSize = 5;
    series.BorderWidth = 2;
    series.Color = System.Drawing.Color.Blue;

    // 添加数据点
    series.Points.Add(new System.Web.UI.DataVisualization.Charting.DataPoint(1, 10));
    series.Points.Add(new System.Web.UI.DataVisualization.Charting.DataPoint(2, 20));
    series.Points.Add(new System.Web.UI.DataVisualization.Charting.DataPoint(3, 30));
    series.Points.Add(new System.Web.UI.DataVisualization.Charting.DataPoint(4, 40));

    chart.Series.Add(series);

    // 自定义Y轴
    chart.ChartAreas[0].AxisY.Title = "自定义Y轴标题";
    chart.ChartAreas[0].AxisY.Minimum = 0; // 设置Y轴最小值
    chart.ChartAreas[0].AxisY.Maximum = 50; // 设置Y轴最大值
    chart.ChartAreas[0].AxisY.Interval = 10; // 设置Y轴刻度间隔
    chart.ChartAreas[0].AxisY.MajorGrid.LineColor = System.Drawing.Color.LightGray; // 设置Y轴主要网格线颜色
    chart.ChartAreas[0].AxisY.MinorGrid.LineColor = System.Drawing.Color.Gray; // 设置Y轴次要网格线颜色

    // 渲染图表到Razor视图
    var chartImage = new System.Web.UI.DataVisualization.Charting.Chart();
    chartImage.ImageStorageMode = System.Web.UI.DataVisualization.Charting.ChartImageStorageMode.UseHttpHandler;
    chartImage.RenderType = System.Web.UI.DataVisualization.Charting.RenderType.ImageTag;
    chartImage.ID = "myChart";
    chartImage.ChartAreas.Add(chart.ChartAreas[0]);
    chartImage.Series.Add(chart.Series[0]);

    // 注册图表控件
    chartImage.Page = this;
    chartImage.RegisterHiddenField("myChart", "myChart");
}

<!-- 渲染图表 -->
<img src="@Url.Action("GetChartImage", "YourController")" alt="My Chart" />

public ActionResult GetChartImage()
{
    var chart = new System.Web.UI.DataVisualization.Charting.Chart();
    chart.Width = 600;
    chart.Height = 400;

    // 添加数据系列和数据点（与Razor视图中的代码相同）

    // 自定义Y轴（与Razor视图中的代码相同）

    // 渲染图表为图像
    var chartImage = new System.Web.UI.DataVisualization.Charting.Chart();
    chartImage.ImageStorageMode = System.Web.UI.DataVisualization.Charting.ChartImageStorageMode.UseHttpHandler;
    chartImage.RenderType = System.Web.UI.DataVisualization.Charting.RenderType.ImageTag;
    chartImage.ID = "myChart";
    chartImage.ChartAreas.Add(chart.ChartAreas[0]);
    chartImage.Series.Add(chart.Series[0]);

    // 将图表渲染为图像字节流
    var ms = new MemoryStream();
    chartImage.SaveImage(ms, System.Web.UI.DataVisualization.Charting.ChartImageFormat.Png);
    return File(ms.ToArray(), "image/png");
}