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本文轉載自查看原文 2012-03-09 14:19 5331 Excel/ .net

使用了兩個開源控件讀取Excel文件的內容,不需要安裝Excel或Office,開發環境可能需要vs2008(2005沒測試過)

NPOI, 讀取xls文件(Excel2003及之前的版本) (NPOI.dll+Ionic.Zip.dll) http://npoi.codeplex.com/

EPPlus, 讀取xlsx文件(Excel2007版本) (EPPlus.dll) http://epplus.codeplex.com/

本文中只實現了Excel文件的讀取,實際上,這兩個控件均支持對其內容,格式,公式等進行修改,這些復雜功能尚無需求,所以沒有實現

讀取接口IExcel:

View Code

public interface IExcel
    {
         /// <summary> 打開文件 </summary>
         bool Open();
         /// <summary> 文件版本 </summary>
        ExcelVersion Version { get; }
         /// <summary> 文件路徑 </summary>
         string FilePath { get; set; }
         /// <summary> 文件是否已經打開 </summary>
         bool IfOpen { get;  }
         /// <summary> 文件包含工作表的數量 </summary>
         int SheetCount { get; }
         /// <summary> 當前工作表序號 </summary>
         int CurrentSheetIndex { get; set; }
         /// <summary> 獲取當前工作表中行數 </summary>
         int GetRowCount();
         /// <summary> 獲取當前工作表中列數 </summary>
         int GetColumnCount();
         /// <summary> 獲取當前工作表中某一行中單元格的數量 </summary>
         /// <param name="Row"> 行序號 </param>
         int GetCellCountInRow( int Row);
         /// <summary> 獲取當前工作表中某一單元格的值（按字符串返回） </summary>
         /// <param name="Row"> 行序號 </param>
         /// <param name="Col"> 列序號 </param>
         string GetCellValue( int Row, int Col);
         /// <summary> 關閉文件 </summary>
         void Close();
    }

public enum ExcelVersion
    {
         /// <summary> Excel2003之前版本 ,xls </summary>
        Excel03,
         /// <summary> Excel2007版本 ,xlsx   </summary>
        Excel07

xls文件實現:

View Code

using NPOI.HSSF.UserModel;

public class Excel03:IExcel
    {
         public Excel03()
        { }

         public Excel03( string path)
        { filePath = path; }

         private FileStream file = null;
         private string filePath = "";
         private HSSFWorkbook book = null;
         private int sheetCount= 0;
         private bool ifOpen = false;
         private int currentSheetIndex = 0;
         private HSSFSheet currentSheet = null;

         public string FilePath
        {
             get  { return filePath; }
             set { filePath = value; }
        }

         public bool Open()
        {
             try
            {
                file = new FileStream(filePath, FileMode.Open, FileAccess.Read);
                book= new HSSFWorkbook(file);

                 if (book == null) return false;
                sheetCount = book.NumberOfSheets;
                currentSheetIndex = 0;
                currentSheet = (HSSFSheet)book.GetSheetAt( 0);
                ifOpen = true;
            }
             catch (Exception ex)
            {
                 throw new Exception( " 打開文件失敗，詳細信息： " + ex.Message);
            }
             return true;
        }

         public void  Close()
        {
             if (!ifOpen) return;
            file.Close();
        }

         public ExcelVersion Version
        { get { return ExcelVersion.Excel03; } }

         public bool IfOpen
        { get { return ifOpen; } }

         public int SheetCount
        { get { return sheetCount; } }

         public int CurrentSheetIndex
        {
             get { return currentSheetIndex; }
             set
            {
                 if (value != currentSheetIndex)
                {
                     if (value >= sheetCount)
                         throw new Exception( " 工作表序號超出范圍 ");
                    currentSheetIndex = value;
                    currentSheet = (HSSFSheet)book.GetSheetAt(currentSheetIndex);
                }
            }
        }

         public int GetRowCount()
        {
             if (currentSheet == null) return 0;
             return currentSheet.LastRowNum + 1;
        }

         public int GetColumnCount()
        {
             if (currentSheet == null) return 0;
             int colCount = 0;
             for ( int i = 0; i <= currentSheet.LastRowNum; i++)
            {
                 if (currentSheet.GetRow(i) != null && currentSheet.GetRow(i).LastCellNum+ 1 > colCount)
                    colCount = currentSheet.GetRow(i).LastCellNum + 1;
            }
             return colCount;
        }

         public int GetCellCountInRow( int Row)
        {
             if (currentSheet == null) return 0;
             if (Row > currentSheet.LastRowNum) return 0;
             if (currentSheet.GetRow(Row) == null) return 0;

             return currentSheet.GetRow(Row).LastCellNum+ 1;
        }

         public string GetCellValue( int Row, int Col)
        {
             if (Row > currentSheet.LastRowNum) return "";
             if (currentSheet.GetRow(Row) == null) return "";
             HSSFRow r = (HSSFRow)currentSheet.GetRow(Row);

              if (Col > r.LastCellNum) return "";
              if (r.GetCell(Col) == null) return "";
              return r.GetCell(Col).StringCellValue;
        }

xlsx文件實現:

View Code

using OfficeOpenXml;

public class Excel07:IExcel
    {
         public Excel07()
        { }

         public Excel07( string path)
        { filePath = path; }

         private string filePath = "";
         private ExcelWorkbook book = null;
         private int sheetCount = 0;
         private bool ifOpen = false;
         private int currentSheetIndex = 0;
         private ExcelWorksheet currentSheet = null;
         private ExcelPackage ep = null;

         public bool Open()
        {
             try
            {
                ep = new ExcelPackage( new FileInfo(filePath));

                 if (ep == null) return false;
                book =ep.Workbook;
                sheetCount = book.Worksheets.Count;
                currentSheetIndex = 0;
                currentSheet = book.Worksheets[ 1];
                ifOpen = true;
            }
             catch (Exception ex)
            {
                 throw new Exception( " 打開文件失敗，詳細信息： " + ex.Message);
            }
             return true;
        }

         public void Close()
        {
             if (!ifOpen || ep == null) return;
            ep.Dispose();
        }

         public ExcelVersion Version
        { get { return ExcelVersion.Excel07; } }

         public string FilePath
        {
             get { return filePath; }
             set { filePath = value; }
        }

         public bool IfOpen
        { get { return ifOpen; } }

         public int SheetCount
        { get { return sheetCount; } }

         public int CurrentSheetIndex
        {
             get  { return currentSheetIndex; }
             set
            {
                 if (value != currentSheetIndex)
                {
                     if (value >= sheetCount)
                         throw new Exception( " 工作表序號超出范圍 ");
                    currentSheetIndex = value;
                    currentSheet =book.Worksheets[currentSheetIndex+ 1];
                }
            }
        }

         public int GetRowCount()
        {
             if (currentSheet == null) return 0;
             return currentSheet.Dimension.End.Row;
        }

         public int GetColumnCount()
        {
             if (currentSheet == null) return 0;
             return currentSheet.Dimension.End.Column;
        }

         public int GetCellCountInRow( int Row)
        {
             if (currentSheet == null) return 0;
             if (Row >= currentSheet.Dimension.End.Row) return 0;
             return currentSheet.Dimension.End.Column;
        }

         public string GetCellValue( int Row, int Col)
        {
             if (currentSheet == null) return "";
             if (Row >= currentSheet.Dimension.End.Row || Col >= currentSheet.Dimension.End.Column) return "";
             object tmpO =currentSheet.GetValue(Row + 1, Col + 1);
             if (tmpO == null) return "";
             return tmpO.ToString();
        }

調用類:

View Code

public class ExcelLib
    {
         /// <summary> 獲取Excel對象 </summary>
         /// <param name="filePath"> Excel文件路徑 </param>
         /// <returns></returns>
         public static IExcel GetExcel( string filePath)
        {
             if (filePath.Trim() == "")
                 throw new Exception( " 文件名不能為空 ");

             if(!filePath.Trim().EndsWith( " xls ") && !filePath.Trim().EndsWith( " xlsx "))
                 throw new Exception( " 不支持該文件類型 ");

             if (filePath.Trim().EndsWith( " xls "))
            {
                IExcel res = new Excel03(filePath.Trim());
                 return res;
            }
             else if (filePath.Trim().EndsWith( " xlsx "))
            {
                IExcel res = new Excel07(filePath.Trim());
                 return res;
            }
             else return null;
        }

調用：

ExcelLib.IExcel tmp = ExcelLib.ExcelLib.GetExcel(Application.StartupPath + " \\TestUnicodeChars.xls ");
// ExcelLib.IExcel tmp = ExcelLib.ExcelLib.GetExcel(Application.StartupPath + "\\TestUnicodeChars.xlsx");

if (tmp == null) MessageBox.Show( " 打開文件錯誤 ");
try
{
     if (!tmp.Open())
    MessageBox.Show( " 打開文件錯誤 ");

     tmp.CurrentSheetIndex = 1;
     int asdf = tmp.GetColumnCount();
     string sdf = tmp.GetCellValue( 0, 1);
    tmp.Close();
}
catch (Exception ex)
{ MessageBox.Show(ex.Message); return

ExcelWorksheet ws = pck.Workbook.Worksheets.Add("Fix Asset");

                //Load the datatable into the sheet, starting from cell A1. Print the column names on row 1
                //ws.Cells["A1"].LoadFromDataTable(tbl, true);
                ws.Cells["A1"].LoadFromCollection(assets, true);//collection型數據源

                //寫到客戶端（下載）
                Response.Clear();
                Response.AddHeader("content-disposition", "attachment; filename=FixAsset.xlsx");
                Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
                Response.BinaryWrite(pck.GetAsByteArray());
                //ep.SaveAs(Response.OutputStream);    第二種方式
                Response.Flush();
                Response.End();

注意：如果是在ASCX中調用，需要：

在Page_Load中注冊兩行Javascript腳本，string script = “_spOriginalFormAction = document.forms[0].action;\n_spSuppressFormOnSubmitWrapper = true;”;

this.ClientScript.RegisterClientScriptBlock(this.GetType(), “script”, script, true);

可以查看：http://www.cnblogs.com/ceci/archive/2012/09/05/2671538.html

轉至http://blog.csdn.net/rrrrssss00/article/details/6590944
http://epplus.codeplex.com/

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