餅圖中的值

Question

如何使用ChartHelper在餅圖中顯示每個餅圖的值？ 我正在使用MVC3 / Razor語法。

試着這樣做：

該圖片來自MVC中ChartHelper的本教程 ：

我的代碼：

var bytes = new Chart(600, 300).AddSeries(
                    chartType: "pie",
                    legend: "Sales in Store per Payment Collected",
                    xValue: viewModel.SalesInStorePerPaymentCollected.XValues,
                    yValues: viewModel.SalesInStorePerPaymentCollected.YValues
                    )
                    .GetBytes("png");


            return File(bytes, "image/png");

Answer 1

我是通過使用System.Web.UI.DataVisualization.Charting.Chart類完成的。

這是我的控制器中的代碼：

public ActionResult Chart()
{
    Chart chart = new Chart();
    chart.ChartAreas.Add(new ChartArea());

    chart.Series.Add(new Series("Data"));
    chart.Series["Data"].ChartType = SeriesChartType.Pie;
    chart.Series["Data"]["PieLabelStyle"] = "Outside"; 
    chart.Series["Data"]["PieLineColor"] = "Black";
    chart.Series["Data"].Points.DataBindXY(
        data.Select(data => data.Name.ToString()).ToArray(), 
        data.Select(data => data.Count).ToArray());
    //Other chart formatting and data source omitted.

    MemoryStream ms = new MemoryStream();
    chart.SaveImage(ms, ChartImageFormat.Png);
    return File(ms.ToArray(), "image/png");
}

觀點：

<img alt="alternateText" src="@Url.Action("Chart")" />

Answer 2

我的解決方案歸功於DaveShaw。 需要更多的調整，但給了我大部分我需要的東西。

        Chart chart = new Chart();

        chart.ChartAreas.Add(new ChartArea());

        chart.Series.Add(new Series("Data"));
        chart.Legends.Add(new Legend("Stores"));
        chart.Series["Data"].ChartType = SeriesChartType.Pie;
        chart.Series["Data"]["PieLabelStyle"] = "Outside";
        chart.Series["Data"]["PieLineColor"] = "Black";
        for (int x = 0; x < viewModel.SalesInStorePerPaymentCollected.XValues.Length; x++)
        {
           int ptIdx = chart.Series["Data"].Points.AddXY(
                viewModel.SalesInStorePerPaymentCollected.XValues[x],
                viewModel.SalesInStorePerPaymentCollected.YValues[x]);
           DataPoint pt = chart.Series["Data"].Points[ptIdx];
           pt.LegendText = "#VALX: #VALY";
           pt.LegendUrl = "/Contact/Details/Hey";
        }

        chart.Series["Data"].Label = "#PERCENT{P0}";
        chart.Series["Data"].Font = new Font("Segoe UI", 8.0f, FontStyle.Bold);
        chart.Series["Data"].ChartType = SeriesChartType.Pie;
        chart.Series["Data"]["PieLabelStyle"] = "Outside";
        chart.Series["Data"].Legend = "Stores";
        chart.Legends["Stores"].Docking = Docking.Bottom;

        var returnStream = new MemoryStream();
        chart.ImageType = ChartImageType.Png;
        chart.SaveImage(returnStream);
        returnStream.Position = 0;
        return new FileStreamResult(returnStream, "image/png");

呈現給此：

Answer 3

我的答案和解決方案（與解釋一起使用）：

這適合MVC 4和MVC 3與.NET 4框架並添加對System.Web.DataVisualization.dll的引用而不是.net System.Web.Helpers，DataVisualization.dll可以在http：//www.codeproject找到.COM /用品/ 125230 / ASP-NET-MVC-表-控制

ChartApplication->外部參考

可以在那里找到有關DataVisualization的圖表上的更多信息。

沒關系，它可以替換為：

        public ActionResult Chart()
    {
        Chart chart = new Chart();

        chart.ChartAreas.Add(new ChartArea());

        chart.Series.Add(new Series("Data"));
        chart.Legends.Add(new Legend("Stores"));
        chart.Series["Data"].ChartType = SeriesChartType.Spline;
        chart.Series["Data"].Points.AddXY(1.0, 5.0);
        chart.Series["Data"].Points.AddXY(2.0, 9.0);
        /*
        chart.Series["Data"]["PieLabelStyle"] = "Outside";
        chart.Series["Data"]["PieLineColor"] = "Black";
        */
        /*
            int ptIdx = chart.Series["Data"].Points.AddXY(1.0, 5.0);
            DataPoint pt = chart.Series["Data"].Points[ptIdx];
            pt.LegendText = "#VALX: #VALY";
            pt.LegendUrl = "/Contact/Details/Hey";
        */
        /*
        chart.Series["Data"].Label = "#PERCENT{P0}";
        chart.Series["Data"].Font = new Font("Segoe UI", 8.0f, FontStyle.Bold);
        chart.Series["Data"].ChartType = SeriesChartType.Pie;
        chart.Series["Data"]["PieLabelStyle"] = "Outside";
        chart.Series["Data"].Legend = "Stores";
        chart.Legends["Stores"].Docking = Docking.Bottom;
        */
        var returnStream = new MemoryStream();
        chart.ImageType = ChartImageType.Png;
        chart.SaveImage(returnStream);
        returnStream.Position = 0;
        return new FileStreamResult(returnStream, "image/png");
    }

或（對於帶有.net 4和System.Web.Helpers的mvc 4和mvc 3）：

        public ActionResult Chart()
    {
        var bytes = new Chart(600, 300).AddSeries(
                            chartType: "pie",
                            legend: "Sales in Store per Payment Collected",
                            xValue: new[] { "Jan", "Feb", "Mar", "Apr", "May" },
                            yValues: new[] { "20", "20", "40", "10", "10" }
                            )
                            .Write("png");
        return null;
    }

當然，你需要在兩者中添加以下內容：.cshtml：

<img src="/Home/Chart" alt="" />