C#生成图表的五种终极方案和避坑指南

// Excel图表生成示例（伪代码）
Application excelApp = new Application();
Workbook workbook = excelApp.Workbooks.Add();
Worksheet worksheet = (Worksheet)workbook.Worksheets[1];
Range range = worksheet.Range["A1:B5"];
range.Value2 = new object[,] { { "月份", "销售额" }, { "1月", 100 }, { "2月", 200 }, { "3月", 150 }, { "4月", 300 } };

ChartObjects chartObjects = (ChartObjects)worksheet.ChartObjects();
ChartObject chartObject = chartObjects.Add(10, 10, 300, 300);
Chart chart = chartObject.Chart;
chart.SetSourceData(range);
chart.ChartType = XlChartType.xlColumnClustered;
chart.HasTitle = true;
chart.ChartTitle.Text = "季度销售趋势";

// Windows Forms柱状图生成（伪代码）
Chart chart = new Chart();
chart.Width = 600;
chart.Height = 400;

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

Series series = new Series();
series.ChartType = SeriesChartType.Column;
series.Points.AddXY("A", 10);
series.Points.AddXY("B", 20);
series.Points.AddXY("C", 15);

chart.Series.Add(series);
this.Controls.Add(chart);

// OxyPlot折线图生成（伪代码）
PlotModel model = new PlotModel { Title = "实时监控" };
LineSeries series = new LineSeries();
for (int i = 0; i < 100; i++) {
    series.Points.Add(new DataPoint(i, Math.Sin(i * 0.1)));
}
model.Series.Add(series);

PlotView plotView = new PlotView { Model = model };
this.Controls.Add(plotView);

<!-- Blazor组件示例 -->
<canvas id="myChart"></canvas>

@code {
    protected override async Task OnAfterRenderAsync(bool firstRender) {
        if (firstRender) {
            await JSRuntime.InvokeVoidAsync("initializeChart", "myChart", new object[] { 10, 20, 30 });
        }
    }
}

// JavaScript交互（Chart.js）
function initializeChart(canvasId, data) {
    var ctx = document.getElementById(canvasId).getContext('2d');
    new Chart(ctx, {
        type: 'line',
        data: {
            labels: ['A', 'B', 'C'],
            datasets: [{
                label: '数据',
                data: data
            }]
        }
    });
}

// EPPlus图表生成（伪代码）
using (var package = new ExcelPackage()) {
    var worksheet = package.Workbook.Worksheets.Add("Sheet1");
    worksheet.Cells["A1:B5"].LoadFromCollection(data);
    
    var chart = worksheet.Drawings.AddChart("Chart1", eChartType.ColumnClustered);
    chart.SetPosition(5, 0, 2, 0);
    chart.SetSize(600, 400);
    chart.Series.Add("B1:B5", "A1:A5");
    chart.Title.Text = "年度预算对比";
    
    package.SaveAs(new FileInfo("Report.xlsx"));
}