C＃：使用ExcelPackage获取行/列数

Question

我需要从Excel电子表格中读取和写入数据。有没有一种方法可以找出某个工作表使用ExcelPackage有多少行/列？我有以下代码：

FileInfo newFile = new FileInfo(@"C:\example.xlsx");
using (ExcelPackage xlPackage = new ExcelPackage(newFile)) 
{
    ExcelWorksheet worksheet = xlPackage.Workbook.Worksheets[1];
}

我需要迭代这个工作表所拥有的每个单元格并将其吐入一个相当大的表中，但我不想打印出空白单元格或获得异常。是否有类似worksheet.rowNum或colNum的方法？

Answer 1

您可以使用ExcelPackage（EPPlus.dll版本3.0.0.2）获取行数和列数，如下所示：

  var rowCnt = worksheet.Dimension.End.Row;
  var colCnt = worksheet.Dimension.End.Column;

Answer 2

这就是我的所作所为：

要获取工作簿上的值数组：

object[,] valueArray = sheet.Cells.GetValue<object[,]>();

获取范围执行以下操作：

int rangeMaxRows = sheet.Dimension.End.Row; 
int rangeMaxColumns = sheet.Dimension.End.Column;

Answer 3

我将从UsedRange属性开始，然后对UsedRange的最后一行中的每个Cell执行Cell.End（xlUp）。这应该为每列提供最终单元格，具有最大行索引的单元格是真实使用范围中的最后一个单元格。

UsedRange属性可能显示错误，因为清除单元格但未删除单元格时，不会更新UsedRange属性。要使UsedRange属性再次有效，只需选择最后一个单元格后面的所有行和列（所有空白单元格），然后进行编辑 - >删除。

Answer 4

int row = _excelSheet.Rows.CurrentRegion.EntireRow.Count;
int col = _excelSheet.Columns.CurrentRegion.EntireColumn.Count;

Answer 5

我只是做了以下循环来解决问题。只有当你知道预先有多少列时，它才能正常工作。否则，它将需要另一个循环迭代。

int totalCells = 0;
int totalRows = -1;

do
{
     totalRows++;
} while (worksheet.Cell(totalRows + 1, 1).Value != @"");
totalCells = totalRows * 12;

Answer 6

我自己使用了sheet.UsedRange，但注意到范围末端的一些单元格是空白但仍包含在范围内。

这是有效的，但是为了提高效率，你可能会更好地从范围的最后一行开始，并重新计算数据的结束位置（而不是从第一行开始的这个片段！）

        int count = 0;
        E.Range excelRange = sheet.UsedRange;
        object[,] valueArray = (object[,])excelRange.get_Value(E.XlRangeValueDataType.xlRangeValueDefault);
        if (valueArray.GetUpperBound(0) > 1)
        {
            for (int i = 0; i < valueArray.GetUpperBound(0) + 2; i++)
            {
                if (valueArray[i + 2, 1] == null)
                    break;
                else
                    count++;
            }
        }

Answer 7

我使用ExcelPackage库查找了一些网站 此外，codeplex上的页面有一个问题 - 如何获取行数/列数？

似乎没有它的支持。抱歉，文档也不可用 您将不得不迭代行/列（请记住电子表格可以容纳的最大行/列）并检查单元格是否包含任何值。

请参阅此链接 - http://web.archive.org/web/20110123164144/http://nayyeri.net/use-excelpackage-to-manipulate-open-xml-excel-files（原始链接已死）

Answer 8

获取行和列总数的最好方法是使用以下方法：

int col = sheet.Dimension.Columns;
int row = sheet.Dimension.Rows;

Answer 9

Epplus不支持usedrange，但你可以使用usedrange.cs 假设您已下载最新的EPPlus源代码， 对Worksheet.cs进行更改：使原始部分。 然后创建名为UsedRange.cs的单独cs文件，将下面的代码粘贴到其中并编译。

namespace OfficeOpenXml
{
   using System;
   using System.Collections.Generic;
   using System.Text;
   using OfficeOpenXml.Style;
   using System.Data;
/// <summary>
/// This class provides easy access to used range objects such as
/// UsedRows, UsedColumns, UsedCells, UsedRow, UsedColumn etc.
/// Authored by Mukesh Adhvaryu
/// </summary>
public sealed class UsedRange : ExcelRange,IEnumerable<UsedRange>
{
    #region local variables
    int elementIndex=-1, cursor=-1, position=-1;
    UsedRangeElement element, parentElement;
    public const long MaxCells =(long) ExcelPackage.MaxRows *  
(long)ExcelPackage.MaxColumns;
    #endregion

    #region constructors
    /// <summary>
    /// this constructor is private because its accessibility outside can cause mess
    /// </summary>
    /// <param name="sheet"></param>
    /// <param name="element"></param>
    /// <param name="elementIndex"></param>
    /// <param name="cursor"></param>
    UsedRange(ExcelWorksheet sheet, UsedRangeElement element, int elementIndex, int cursor)
        : base(sheet)
    {
        this.element = element;
        switch (element)
        {
            case UsedRangeElement.Rows:
            case UsedRangeElement.Columns:
            case UsedRangeElement.Cells:
                parentElement = UsedRangeElement.Range;
                break;
            case UsedRangeElement.Row:
                parentElement = UsedRangeElement.Rows;
                break;
            case UsedRangeElement.Column:
                parentElement = UsedRangeElement.Columns;
                break;
            case UsedRangeElement.Cell:
                parentElement = UsedRangeElement.Cells;
                break;
            case UsedRangeElement.RowCell:
                parentElement = UsedRangeElement.Row;
                break;
            case UsedRangeElement.ColumnCell:
                parentElement = UsedRangeElement.Column;
                break;
            default:
                parentElement = 0;
                break;
        }
        this.elementIndex = elementIndex;
        this.cursor = cursor;
        SetRange();
    }

    /// <summary>
    /// this constructor is private because its accessibility outside can cause mess
    /// </summary>
    /// <param name="sheet"></param>
    /// <param name="element"></param>
    /// <param name="elementIndex"></param>
    UsedRange(ExcelWorksheet sheet, UsedRangeElement element, int elementIndex)
        : this(sheet, element, elementIndex, -1) { }

    /// <summary>
    /// this constructor is private because its accessibility outside can cause mess
    /// </summary>
    /// <param name="sheet"></param>
    /// <param name="element"></param>
    UsedRange(ExcelWorksheet sheet, UsedRangeElement element)
        : this(sheet, element, -1, -1) { }

    /// <summary>
    /// this constructor used only to create cellcollection range
    /// since cellindex can be very large long value considering rows * columns =no of cells in worksheet
    /// this constructor is private because its accessibility outside can cause mess
    /// </summary>
    /// <param name="sheet"></param>
    /// <param name="cellIndex"></param>
    UsedRange(ExcelWorksheet sheet, long cellIndex)
        : base(sheet)
    {
        this.element = UsedRangeElement.Cell;
        this.parentElement = UsedRangeElement.Cells;
        CellToAddress(cellIndex);
        SetRange();
    }
    #endregion

    #region indexers & properties
    /// <summary>
    /// Returns element at a given index 
    /// </summary>
    /// <param name="index"></param>
    /// <returns></returns>
    public UsedRange this[int index]
    {
        get
        {
            if (index >= Count || index < 0) throw new IndexOutOfRangeException();
            switch (element)
            {
                case UsedRangeElement.Rows:
                    ValidateRow(index);
                    return new UsedRange(_worksheet, UsedRangeElement.Row, index);
                case UsedRangeElement.Columns:
                    ValidateCol(index);
                    return new UsedRange(_worksheet, UsedRangeElement.Column, index);
                case UsedRangeElement.Cells:
                    ValidateCell(index);
                    return new UsedRange(_worksheet, index);
                case UsedRangeElement.Row:
                    return new UsedRange(_worksheet, UsedRangeElement.RowCell, elementIndex, index);
                case UsedRangeElement.Column:
                    return new UsedRange(_worksheet, UsedRangeElement.ColumnCell, elementIndex, index);
                default:
                    return this;
            }
        }
    }

    /// <summary>
    /// Returns particular Cell at a given index
    /// </summary>
    /// <param name="index"></param>
    /// <returns></returns>
    public UsedRange this[long index]
    {
        get
        {
            ValidateCell(index);
            return new UsedRange(_worksheet, index);
        }
    }

    /// <summary>
    /// Returns count of elements in this collection
    /// </summary>
    public int Count
    {
        get
        {
            switch (element)
            {
                case UsedRangeElement.Rows:
                case UsedRangeElement.Column:
                    return _toRow - _fromRow + 1;
                case UsedRangeElement.Columns:
                case UsedRangeElement.Row:
                    return _toCol - _fromCol + 1;
                case UsedRangeElement.Cells:
                case UsedRangeElement.Range:
                    return (_toRow - _fromRow + 1) * (_toCol - _fromCol + 1);
                default:
                    return 1;
            }
        }
    }

    /// <summary>
    /// Returns type of this element collection
    /// </summary>
    public UsedRangeElement Element
    {
        get { return element; }
    }

    /// <summary>
    /// Returns parent type of element this collection
    /// </summary>
    public UsedRangeElement ParentElement
    {
        get { return parentElement; }
    }
    #endregion

    #region private methods
    /// <summary>
    /// Validates row index for row collection
    /// added by mukesh
    /// </summary>
    /// <param name="Row"></param>
    private void ValidateRow(int Row)
    {
        if (Row < 0 || Row > ExcelPackage.MaxRows)
        {
            throw (new ArgumentException("Row out of range"));
        }
    }

    /// <summary>
    /// Validates column index for column collection
    /// added by mukesh
    /// </summary>
    /// <param name="Col"></param>
    private void ValidateCol(int Col)
    {
        if (Col < 0 || Col > ExcelPackage.MaxColumns)
        {
            throw (new ArgumentException("Column out of range"));
        }
    }

    /// <summary>
    /// Validates cell index for cell collection
    /// added by mukesh
    /// </summary>
    /// <param name="Cell"></param>
    private void ValidateCell(long Cell)
    {
        if (Cell <0 || Cell > UsedRange.MaxCells)
        {
            throw (new ArgumentException("Cell out of range"));
        }

    }

    /// <summary>
    /// converts cell index into a point consists of row and column index.
    /// added by mukesh
    /// </summary>
    /// <param name="Cell"></param>
    private void CellToAddress(long Cell)
    {
        long rc = ((_worksheet._cells[_worksheet._cells.Count - 1] as ExcelCell).Row
                    - (_worksheet._cells[0] as ExcelCell).Row) + 1;
        long cc = _worksheet._maxCol - _worksheet._minCol + 1;
        elementIndex = (int)(Cell / cc) + 1;
        cursor = (int)(Cell % cc) + 1;
    }

    /// <summary>
    /// This method is added by mukesh
    /// </summary>
    /// <returns>
    /// Excel Range Object
    /// </returns>
    ExcelRange SetRange()
    {
        switch (element)
        {
            case UsedRangeElement.Rows:
            case UsedRangeElement.Columns:
            case UsedRangeElement.Cells:
                return this[(_worksheet._cells[0] as ExcelCell).Row, _worksheet._minCol,
                (this._worksheet._cells[_worksheet._cells.Count - 1] as ExcelCell).Row,
                _worksheet._maxCol];

            case UsedRangeElement.Row:
                return this[elementIndex + 1, _worksheet._minCol, elementIndex + 1, _worksheet._maxCol];

            case UsedRangeElement.Column:
                return this[(_worksheet._cells[0] as ExcelCell).Row, elementIndex + 1,
                (_worksheet._cells[_worksheet._cells.Count - 1] as ExcelCell).Row, elementIndex + 1];
            case UsedRangeElement.RowCell:
            case UsedRangeElement.Cell:
                return this[elementIndex + 1, cursor + 1];
            case UsedRangeElement.ColumnCell:
                return this[cursor + 1, elementIndex + 1];
            default:
                return this;
        }
    }
    #endregion

    #region internal static methods
    /// <summary>
    /// these static methods will be used to return row collection from worksheet
    /// added by mukesh
    /// </summary>
    /// <param name="sheet"></param>
    /// <returns></returns>
    internal static UsedRange RowCollection(ExcelWorksheet sheet)
    {
        return new UsedRange(sheet, UsedRangeElement.Rows);
    }

    /// <summary>
    /// these static methods will be used to return column collection from worksheet
    /// added by mukesh
    /// </summary>
    /// <param name="sheet"></param>
    /// <returns></returns>
    internal static UsedRange ColumnCollection(ExcelWorksheet sheet)
    {
        return new UsedRange(sheet, UsedRangeElement.Columns);
    }

    /// <summary>
    /// these static methods will be used to return cell collection from worksheet
    /// added by mukesh
    /// </summary>
    /// <param name="sheet"></param>
    /// <returns></returns>
    internal static UsedRange CellCollection(ExcelWorksheet sheet)
    {
        return new UsedRange(sheet, UsedRangeElement.Cells);
    }
    #endregion

    #region ienumerable implementation
    public new IEnumerator<UsedRange> GetEnumerator()
    {
        position = -1;
        for (int i = 0; i < Count; i++)
        {
            ++position;
            yield return this[i];
        }
    }
    System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
    {
        return this.GetEnumerator();
    }
    #endregion

    /// <summary>
    /// Determine Type of Used range element. 
    /// Being used to return RowCollection, ColumnCollection, CellCollection or single Row, Column or Cell
    /// added by mukesh
    /// </summary>
    public enum UsedRangeElement
    {
        Range, Rows, Columns, Cells,
        Row, Column, Cell, RowCell, ColumnCell
    }
}

public sealed partial class ExcelWorksheet : XmlHelper
{
    /// <summary>
    /// Provides access to a range of used rows
    /// </summary>  
    public UsedRange UsedRows
    {
        get
        {
            return UsedRange.RowCollection(this);
        }
    }
    /// <summary>
    /// Provides access to a range of used columns. added by mukesh
    /// </summary>  
    public UsedRange UsedColumns
    {
        get
        {
            return UsedRange.ColumnCollection(this);
        }
    }
    /// <summary>
    /// Provides access to a range of used cells. added by mukesh
    /// </summary>  
    public UsedRange UsedCells
    {
        get
        {
            return UsedRange.CellCollection(this);
        }
    }
    /// <summary>
    /// UsedRange object of the worksheet. added by mukesh
    /// this range contains used Top left cell to Bottom right.
    /// If the worksheet has no cells, null is returned
    /// </summary>
}
}