使用EPPlus设置线图使用的数据

我正在尝试使用EPPlus自动在Excel中添加一个简单的线条图。 我已经知道包含我想要使用的数据的单元格的范围。 我希望graphics如下所示：

“ Before和“ After专栏比所展示的要多得多。

我正在使用此代码来创buildgraphics并将其放置，但我不确定如何设置graphics使用的数据：

 ExcelChart ec = ws.Drawings.AddChart("Line Time Graph", OfficeOpenXml.Drawing.Chart.eChartType.Line); ec.Title.Text = "Benchmarks"; ec.SetPosition(_times.Count + 2, 0, 1, 0); 

这可能与ec.Series.Add但我不确定如何正确使用它。 如果你能把我指向正确的方向，那就太好了。

Answer 1

希望这可以帮助你：

 ExcelChart ec = ws.Drawings.AddChart("Line Time Graph", OfficeOpenXml.Drawing.Chart.eChartType.Line); ec.Title.Text = "Benchmarks"; ec.SetPosition(_times.Count + 2, 0, 1, 0); ec.SetSize(800, 600); var ran1 = sheet.Cells["A3:A10"]; var ran2 = sheet.Cells["G3:G10"]; // label range if there is. Otherwise, let select blank range then edit XML data later to remove 'c:cat' tags (bellow example) var serie1 = ec.Series.Add(ran1, ran2); // use serie1 variable to format and so on // set serie1.HeaderAddress to A2 also var ran1 = sheet.Cells["B3:B10"]; var serie2 = ec.Series.Add(ran1, ran2); // use serie2 variable to format and so on 

我刚刚testing的另一个完整例子：

 using System; using System.Collections.Generic; using System.Linq; using System.Text; using OfficeOpenXml; using System.IO; using OfficeOpenXml.Drawing.Chart; namespace TestExcelEPPluss { class Program { static void Main(string[] args) { ExcelPackage package = new ExcelPackage(); var sheet = package.Workbook.Worksheets.Add("TestingGraph"); Random r = new Random(); var cell = sheet.Cells["A1"]; cell.Value = "Before"; cell = sheet.Cells["B1"]; cell.Value = "After"; for (int i = 0; i < 100; i++) { cell = sheet.Cells[i + 2, 1]; cell.Value = r.Next(300, 500); cell = sheet.Cells[i + 2, 2]; cell.Value = r.Next(300, 500); } ExcelChart ec = (ExcelLineChart)sheet.Drawings.AddChart("chart_1", eChartType.Line); ec.SetPosition(1, 0, 3, 0); ec.SetSize(800, 300); //ec.Legend.Add(); var ran1 = sheet.Cells["A2:A101"]; var ran2 = sheet.Cells["0:0"]; var serie1 = (ExcelLineChartSerie)ec.Series.Add(ran1, ran2); serie1.Header = sheet.Cells["A1"].Value.ToString(); ran1 = sheet.Cells["B2:B101"]; var serie2 = ec.Series.Add(ran1, ran2); serie2.Header = sheet.Cells["B1"].Value.ToString(); var xml = ec.ChartXml; var lst = xml.GetElementsByTagName("c:lineChart"); foreach (System.Xml.XmlNode item in lst[0].ChildNodes) { if (item.Name.Equals("ser")) { foreach (System.Xml.XmlNode subitem in item.ChildNodes) { if (subitem.Name.Equals("c:cat")) { item.RemoveChild(subitem); break; } } } } string path = @"C:\test1.xlsx"; File.WriteAllBytes(path, package.GetAsByteArray()); package.Dispose(); Console.WriteLine("Done - Path: {0}", path); Console.ReadLine(); } } } 

c:cat是ser系列的类别，从图表xml中删除c:cat标签，那么你的图表将使用1,2,3,4,5,...作为类别（这里是x轴）的默认值。