C#之Excel操作

下面的这几个方法是我在项目中经常用到的，欢迎大家批评指正

读取Excel表中的数据

第一种：功能丰富，速度慢

 　　　　/// <summary>
        /// 从Excel读取数据
        /// </summary>
        /// <param name="path">Excel文档的全路径</param>
        /// <returns>将一行作为一个对象，所以返回的是很多行数据的对象</returns>
        public Model[] ReadDataFromExcel(string path)
        {
            List<Model> list = new List<Model>();
            Application excelApp = null;
            try
            {
                excelApp = new Application() { Visible = false, DefaultFilePath = "", DisplayAlerts = true, SheetsInNewWorkbook = 1 };
                Workbooks books = excelApp.Workbooks;
                if (File.Exists(path))
                {
                    Workbook book = books.Open(path);
                    Worksheet sheet = book.Sheets.get_Item(1);
                    if (sheet != null)
                    {
                        int rowNum = sheet.UsedRange.Rows.Count;
                        DateTime timeLimit;
                        timeLimit = GetTime(((Range)sheet.Cells[2, "B"]).Text.ToString()).AddSeconds(sectionNum*timeSpan*60);
                        
                        //从第2行开始读数据
                        for (int i = 2; i < rowNum; i++)
                        {
                            if (((Range)sheet.Cells[i, "A"]).Text != "" && ((Range)sheet.Cells[i, "B"]).Text != "")
                            {

                                if (timeLimit.CompareTo(GetTime(((Range)sheet.Cells[i, "B"]).Text.ToString())) < 0)
                                {
                                    break;
                                }
                                else
                                {
                                    Model m = new Model()
                                    {
                                        SN = ((Range)sheet.Cells[i, "A"]).Text.ToString(),
                                        time = GetTime(((Range)sheet.Cells[i, "B"]).Text.ToString()),
                                        ch1 = ((Range)sheet.Cells[i, "C"]).Text.ToString(),
                                        ch2 = ((Range)sheet.Cells[i, "D"]).Text.ToString(),
                                        ch3 = ((Range)sheet.Cells[i, "E"]).Text.ToString(),
                                        ch4 = ((Range)sheet.Cells[i, "F"]).Text.ToString()
                                    };
                                    list.Add(m);
                                }
                                
                            }
                        }

                    }
                }

            }
            catch (Exception ex)
            {
                throw new Exception(ex.Message);
            }
            finally
            {
                //执行完读取Excel数据后，将关闭该进程
                KillExcel(excelApp);
            }
            return list.ToArray();
        }

第二种：速度快

  public DataTable ExcelToDS(string filePath)
        {
            string connStr = "";
            string fileType = System.IO.Path.GetExtension(Path.GetFileName(filePath));
            if (string.IsNullOrEmpty(fileType))
            {
                return null;
            }
            if (fileType == ".xls")
                connStr = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + filePath + ";" + ";Extended Properties="Excel 8.0;HDR=YES;IMEX=1"";
            else
                connStr = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + filePath + ";" + ";Extended Properties="Excel 12.0;HDR=YES;IMEX=1"";

            OleDbConnection conn = new OleDbConnection(connStr);
            conn.Open();
            string strExcel = "";
            OleDbDataAdapter myCommand = null;
            DataSet ds = null;
            strExcel = "select * from [sheet1$]";
            myCommand = new OleDbDataAdapter(strExcel, connStr);
            ds = new DataSet();
            myCommand.Fill(ds, "table1");
            return ds.Tables[0];
        }

关闭Excel进程：

  [DllImport("user32.dll", SetLastError = true)]
        static extern int GetWindowThreadProcessId(IntPtr hwnd, out int processId);
        public void KillExcel(Application excelApp)
        {
            try
            {
                if(excelApp!=null)
                {
                    int processId;
                    GetWindowThreadProcessId(new IntPtr(excelApp.Hwnd), out processId);
                    Process p = Process.GetProcessById(processId);
                    p.Kill();
                }
            }
            catch (Exception ex)
            {                
                throw ex;
            }
        }

读取Excel单元格数据：

  /// <summary>
        /// 获取单元格数据
        /// </summary>
        /// <param name="sheet"></param>
        /// <param name="row"></param>
        /// <param name="col"></param>
        /// <returns></returns>
        public string GetValue(Worksheet sheet, int row, int col)
        {
            // 取得单元格.
            var cell = (Range)sheet.Cells[row, col];
            if ((bool)cell.MergeCells == true)
            {
                // 本单元格是 “合并单元格”
                if (cell.MergeArea.Row == row
                && cell.MergeArea.Column == col)
                {
                    // 当前单元格 就是 合并单元格的 左上角 内容.
                    return cell.Text.ToString();
                }
                else
                {
                    // 返回 合并单元格的 左上角 内容.
                    return ((Range)(sheet.Cells[cell.MergeArea.Row, cell.MergeArea.Column])).Text.ToString();
                }
            }
            else
            {
                // 本单元格是 “普通单元格”
                // 获取文本信息.
                return cell.Text.ToString();
            }
        }

 根据文本获取该文本所在行号和所占的行数，一般主要用来读取合并单元格

/// <summary>
      /// 根据文本获取行号和所占行数
      /// </summary>
      /// <param name="sheet">查询的表单</param>
      /// <param name="text">查询的文本</param>
      /// <param name="rowNumber">行号</param>
      /// <param name="rowCounts">所占行数</param>
        public void GetRowNumber(Worksheet sheet, string text,out int rowNumber,out int rowCounts)
        {
            rowNumber = -1;
            rowCounts = -1;
            foreach(Range range in sheet.UsedRange)
            {
                if (range.Value == null)
                    continue;
                if (range.Value.ToString() == text)
                {
                    rowNumber = range.Row;
                    if ((bool)range.MergeCells == true)
                        rowCounts = range.MergeArea.Rows.Count;
                    else
                        rowCounts = 1;
                    break;
                }
            }
        }