23

我已经将 EPPlus 用于 .net 有一段时间了,但仅用于简单的数据操作。是否有任何关于如何使用它来创建数据透视表/图表的示例?它似乎支持它,因为我可以在智能感知中看到数据透视表,但只是不确定语法。

我只能在提供的示例中找到饼图/条形图之类的东西。

4

2 回答 2

28

我从 Tim's Answer 中制作了一个类似的解决方案。首先,我定义了一个简单的接口,用作导出方法的一部分:

public interface IPivotTableCreator
{
    void CreatePivotTable(
        OfficeOpenXml.ExcelPackage pkg, // reference to the destination book
        string tableName,               // "tab" name used to generate names for related items
        string pivotRangeName);         // Named range in the Workbook refers to data
}

然后我实现了一个简单的类来保存变量值和程序代码来完成这项工作:

public class SimplePivotTable : IPivotTableCreator
{
    List<string> _GroupByColumns;
    List<string> _SummaryColumns;
    /// <summary>
    /// Constructor
    /// </summary>
    public SimplePivotTable(string[] groupByColumns, string[] summaryColumns)
    {
        _GroupByColumns = new List<string>(groupByColumns);
        _SummaryColumns = new List<string>(summaryColumns);
    }

    /// <summary>
    /// Call-back handler that builds simple PivatTable in Excel
    /// http://stackoverflow.com/questions/11650080/epplus-pivot-tables-charts
    /// </summary>
    public void CreatePivotTable(OfficeOpenXml.ExcelPackage pkg, string tableName, string pivotRangeName)
    {
        string pageName = "Pivot-" + tableName.Replace(" ", "");
        var wsPivot = pkg.Workbook.Worksheets.Add(pageName);
        pkg.Workbook.Worksheets.MoveBefore(PageName, tableName);

        var dataRange = pkg.Workbook./*Worksheets[tableName].*/Names[pivotRangeName];
        var pivotTable = wsPivot.PivotTables.Add(wsPivot.Cells["C3"], dataRange, "Pivot_" + tableName.Replace(" ", ""));
        pivotTable.ShowHeaders = true;
        pivotTable.UseAutoFormatting = true;
        pivotTable.ApplyWidthHeightFormats = true;
        pivotTable.ShowDrill = true;
        pivotTable.FirstHeaderRow = 1;  // first row has headers
        pivotTable.FirstDataCol = 1;    // first col of data
        pivotTable.FirstDataRow = 2;    // first row of data

        foreach (string row in _GroupByColumns)
        {
            var field = pivotTable.Fields[row];
            pivotTable.RowFields.Add(field);
            field.Sort = eSortType.Ascending;
        }

        foreach (string column in _SummaryColumns)
        {
            var field = pivotTable.Fields[column];
            ExcelPivotTableDataField result = pivotTable.DataFields.Add(field);
        }

        pivotTable.DataOnRows = false;
    }
}

然后我创建我的SimplePivotTable创建者类的一个实例:

IPivotTableCreator ptCreator = new SimplePivotTable(
    new string[] { "OrganizationTitle", "GroupingTitle", "DetailTitle" }, /* collapsible rows */
    new string[] { "Baseline", "Increase", "Decrease", "NetChange", "CurrentCount"}); /* summary columns */

我有第三个类,它目前公开了大约六种不同的方法来获取一个或多个数据集(通常是 List 对象),并将每个数据集转换为具有数据命名范围的数据工作表。现在,我正在调整这些导出方法,以允许我为任何/所有这些导出方法生成数据透视表。他们都做这样的事情:

OfficeOpenXml.ExcelPackage pkg = new ExcelPackage();
ExportCollectionToExcel(pkg, tableName, dataset);   // Create worksheet filled with data
                                                    // Creates a NamedRange of data
ptCreator.CreatePivotTable(pkg, tableName, GetPivotRangeName(tableName));

通过使用界面,我留下了更多机会(我认为)来生成,例如,为多个工作表生成不同的数据透视表。我的基本SimplePivotTable类仅用于具有一些特定假设的单个表,但将配置数据放入以表名称为键的字典中并不难。

希望对某人有所帮助。

于 2012-12-20T20:19:44.793 回答
15

这是我最近创建的枢轴的代码,也许它确实有帮助:

DataTable table = getDataSource();
FileInfo fileInfo = new FileInfo(path);
var excel = new ExcelPackage(fileInfo);
var wsData = excel.Workbook.Worksheets.Add("Data-Worksheetname");
var wsPivot = excel.Workbook.Worksheets.Add("Pivot-Worksheetname");
wsData.Cells["A1"].LoadFromDataTable(table, true, OfficeOpenXml.Table.TableStyles.Medium6);
if (table.Rows.Count != 0)
{
    foreach (DataColumn col in table.Columns)
    {
        // format all dates in german format (adjust accordingly)
        if (col.DataType == typeof(System.DateTime))
        {
            var colNumber = col.Ordinal + 1;
            var range = wsData.Cells[2, colNumber, table.Rows.Count + 1, colNumber];
            range.Style.Numberformat.Format = "dd.MM.yyyy";
        }
    }
}

var dataRange = wsData.Cells[wsData.Dimension.Address.ToString()];
dataRange.AutoFitColumns();
var pivotTable = wsPivot.PivotTables.Add(wsPivot.Cells["A3"], dataRange, "Pivotname");
pivotTable.MultipleFieldFilters = true;
pivotTable.RowGrandTotals = true;
pivotTable.ColumGrandTotals = true;
pivotTable.Compact = true;
pivotTable.CompactData = true;
pivotTable.GridDropZones = false;
pivotTable.Outline = false;
pivotTable.OutlineData = false;
pivotTable.ShowError = true;
pivotTable.ErrorCaption = "[error]";
pivotTable.ShowHeaders = true;
pivotTable.UseAutoFormatting = true;
pivotTable.ApplyWidthHeightFormats = true;
pivotTable.ShowDrill = true;
pivotTable.FirstDataCol = 3;
pivotTable.RowHeaderCaption = "Claims";

var modelField = pivotTable.Fields["Model"];
pivotTable.PageFields.Add(modelField);
modelField.Sort = OfficeOpenXml.Table.PivotTable.eSortType.Ascending;

var countField = pivotTable.Fields["Claims"];
pivotTable.DataFields.Add(countField);

var countryField = pivotTable.Fields["Country"];
pivotTable.RowFields.Add(countryField);
var gspField = pivotTable.Fields["GSP / DRSL"];
pivotTable.RowFields.Add(gspField);

var oldStatusField = pivotTable.Fields["Old Status"];
pivotTable.ColumnFields.Add(oldStatusField);
var newStatusField = pivotTable.Fields["New Status"];
pivotTable.ColumnFields.Add(newStatusField);

var submittedDateField = pivotTable.Fields["Claim Submitted Date"];
pivotTable.RowFields.Add(submittedDateField);
submittedDateField.AddDateGrouping(OfficeOpenXml.Table.PivotTable.eDateGroupBy.Months | OfficeOpenXml.Table.PivotTable.eDateGroupBy.Days);
var monthGroupField = pivotTable.Fields.GetDateGroupField(OfficeOpenXml.Table.PivotTable.eDateGroupBy.Months);
monthGroupField.ShowAll = false;
var dayGroupField = pivotTable.Fields.GetDateGroupField(OfficeOpenXml.Table.PivotTable.eDateGroupBy.Days);
dayGroupField.ShowAll = false;

excel.Save();
于 2012-07-25T13:01:14.523 回答