Excel 幫助類

上班之後，碰到的第一個問題就是將excel中數據導入到sql數據，開發導入功能花了很長時間瞭解這些知識，現將自己處理excel時候用到的幫助類記錄在此：

using System;
using System.Reflection;
using System.IO;
using Microsoft.Office.Interop.Excel;

namespace ZHJZX.Manager.Common
{
    public class ExcelLib
    {

        private ApplicationClass _app = null;  
        private _Workbook _wb = null;  
        private _Worksheet _ws = null;  
        private string _filePath = "";  
        private int _shIndex = 0; // 1 based index  
 
        public event EventHandler ExcelExceptionOccured;  
 
        /// <summary>  
        /// 當前Sheet  
        /// </summary>  
        public int SheetIndex { get { return this._shIndex; } }  
 
        /// <summary>  
        /// 當前文件名  
        /// </summary>  
        public string FileName { get { return this._filePath; } }  
 
        #region private operations   
        /// <summary>  
        /// 打開App  
        /// </summary>  
        private void OpenApp()  
        {  
            this._app = new ApplicationClass();  
            this._app.Visible = false;  
        }  
 
        /// <summary>  
        /// 釋放資源  
        /// </summary>  
        /// <param name="o"></param>  
        private void ReleaseCom()  
        {  
            try  
            {  
                _app.Quit();
                //強制釋放對象
                System.Runtime.InteropServices.Marshal.ReleaseComObject((object)_app);
                System.Runtime.InteropServices.Marshal.ReleaseComObject((object)_wb);
                System.Runtime.InteropServices.Marshal.ReleaseComObject((object)_ws);
            }  
            finally  
            {
                _app = null;
                _wb = null;
                _ws = null;
                GC.Collect(); 
            }  
        }  
 
        /// <summary>  
        /// 檢查App  
        /// </summary>  
        private bool CheckApp()  
        {  
            if (this._app == null)  
            {  
                if (this.ExcelExceptionOccured != null)  
                {  
                    this.ExcelExceptionOccured(this, new ErrorEventArgs(new Exception("Application對象未初始化")));  
                }  
                return false;  
            }  
 
            return true;  
        }  
 
        /// <summary>  
        /// 檢查Book  
        /// </summary>  
        private bool CheckWorkBook()  
        {  
            if (this._wb == null)  
            {  
                if (this.ExcelExceptionOccured != null)  
                {  
                    this.ExcelExceptionOccured(this, new ErrorEventArgs(new Exception("Workbook對象未初始化")));  
                }  
 
                return false;  
            }  
 
            return true;  
        }  
 
        /// <summary>  
        /// 檢查Sheet  
        /// </summary>  
        private bool CheckSheet()  
        {  
            if (this._ws == null)  
            {  
                if (this.ExcelExceptionOccured != null)  
                {  
                    this.ExcelExceptionOccured(this, new ErrorEventArgs(new Exception("Worksheet對象未初始化")));  
                }  
 
                return false;  
            }  
 
            return true;  
        }  
        #endregion  
 
        #region basic operation  
        /// <summary>  
        /// 打開文件  
        /// </summary>  
        /// <param name="filePath"></param>  
        public void Open(string filePath)  
        {  
            // Check Application   
            if (!this.CheckApp()) return;  
 
            // Open workbook  
            this._filePath = filePath;  
            this._wb = this._app.Workbooks._Open(filePath, Missing.Value, Missing.Value, Missing.Value, Missing.Value  
                    , Missing.Value, Missing.Value, Missing.Value, Missing.Value  
                    , Missing.Value, Missing.Value, Missing.Value, Missing.Value);  
 
            // set default sheet  
            this.SetCurrentSheet(1);  
        }  
 
        /// <summary>  
        /// 自動打開Excel對象  
        /// </summary>  
        public ExcelLib()  
        {  
            this.OpenApp();  
        }  
 
        /// <summary>  
        /// 打開excel文件  
        /// </summary>  
        /// <param name="filePath"></param>  
        public ExcelLib(string filePath)  
        {  
            this.OpenApp();  
            this.Open(filePath);  
        }  
 
        /// <summary>  
        /// 保存當前文檔  
        /// </summary>  
        public void Save()  
        {  
            // check workbook   
            if (!this.CheckWorkBook()) return;  
 
            // save the book  
            this._wb.Save();  
              
        }  
 
        /// <summary>  
        /// 另存當前文檔  
        /// </summary>  
        /// <param name="filePath"></param>  
        public void Save(string filePath)  
        {  
            // check workbook   
            if (!this.CheckWorkBook()) return;  
 
            // save work book  
            this._filePath = filePath;  
            bool b = this._app.DisplayAlerts;  
            this._app.DisplayAlerts = false;  
 
            // save work book              
            this._wb.SaveAs(this._filePath, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, XlSaveAsAccessMode.xlNoChange,  
                    Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);  
 
            this._app.DisplayAlerts = b;  
        }  

        /// <summary>
        /// 關閉excel
        /// </summary>
        /// <returns></returns>
        public bool CloseExcel()
        {
            try
            {
                if (this._app != null) // isRunning是判斷xlApp是怎麼啓動的flag.   
                {
                    this._app.Quit();

                    System.Runtime.InteropServices.Marshal.ReleaseComObject(_app);
                    //釋放COM組件，其實就是將其引用計數減1   
                    foreach (System.Diagnostics.Process theProc in System.Diagnostics.Process.GetProcessesByName("EXCEL"))
                    {
                        //先關閉圖形窗口。如果關閉失敗...有的時候在狀態裏看不到圖形窗口的excel了，   
                        //但是在進程裏仍然有EXCEL.EXE的進程存在，那麼就需要殺掉它:p   
                        if (theProc.CloseMainWindow() == false)
                        {
                            theProc.Kill();
                        }
                    }

                    ReleaseCom();
                    return true;
                }
            }
            catch
            {
                return false;
            }
            return true;
        }  

        /// <summary>  
        /// 設置當前工作Sheet（序號：從1記起）  
        /// </summary>  
        /// <param name="sheetIndex"></param>  
        public void SetCurrentSheet(int sheetIndex)  
        {  
            // check workbook   
            if (!this.CheckWorkBook()) return;  
 
            // set sheet object  
            this._shIndex = sheetIndex;  
            this._ws = (_Worksheet)this._wb.Worksheets[sheetIndex];  
        }  
 
        /// <summary>  
        /// 設置當前工作Sheet（序號：從1記起）  
        /// </summary>  
        /// <param name="sheetIndex"></param>  
        public void SetCurrentSheet(string SheetName)  
        {  
            // check workbook   
            if (!this.CheckWorkBook()) return;  
 
            // set sheet object  
            this._ws = (_Worksheet)this._wb.Worksheets[SheetName];  
            this._shIndex = this._ws.Index;  
        }

        /// <summary>
        /// 獲取當前Worksheet
        /// </summary>
        /// <param name="sheetIndex">第幾個Sheet（序號：從1記起）</param>
        /// <returns></returns>
        public _Worksheet GetCurrentSheet(int sheetIndex)
        {
            return (_Worksheet)this._wb.Worksheets[sheetIndex];
        }

        /// <summary>  
        /// 刪除一個工作表  
        /// </summary>  
        /// <param name="SheetName"></param>  
        public void DeleteSheet()  
        {  
            // check workbook   
            if (!this.CheckSheet()) return;  
 
            this._ws.Delete();  
        }  
 
        /// <summary>  
        /// 改名  
        /// </summary>  
        /// <param name="newName"></param>  
        public void RenameSheet(string newName)  
        {  
            // check workbook   
            if (!this.CheckSheet()) return;  
 
            this._ws.Name = newName;  
        }  
 
        /// <summary>  
        /// 創建Sheet  
        /// </summary>  
        /// <param name="newName"></param>  
        public void CreateSheet(string newName)  
        {  
            // check workbook   
            if (!this.CheckWorkBook()) return;  
 
            this._wb.Worksheets.Add(Missing.Value, Missing.Value, Missing.Value, Missing.Value);  
        }  
 
        /// <summary>  
        /// 獲取數量  
        /// </summary>  
        /// <returns></returns>  
        public int GetSheetCount()  
        {  
            // check workbook   
            if (!this.CheckWorkBook()) return -1;  
 
            return this._wb.Worksheets.Count;  
        }  
        #endregion  
 
        #region sheet operation  

        /// <summary>
        /// 刪除指定列的數據
        /// </summary>
        /// <param name="w"></param>
        /// <param name="columnNum"></param>
        public void DeleteColumnData(_Worksheet w, int columnNum)
        {
            ((Range)(w.Columns[columnNum, System.Type.Missing])).Delete(System.Type.Missing);
        }

        /// <summary>  
        /// 設置單元值  
        /// </summary>  
        /// <param name="x"></param>  
        /// <param name="y"></param>  
        /// <param name="value"></param>  
        public void SetCellValue(int x, int y, object value)  
        {  
            if (!this.CheckSheet()) return;  
            this._ws.Cells[x, y] = value;  
        }  
 
        /// <summary>  
        /// 合併單元格  
        /// </summary>  
        /// <param name="x1"></param>  
        /// <param name="y1"></param>  
        /// <param name="x2"></param>  
        /// <param name="y2"></param>  
        public void UniteCells(int x1, int y1, int x2, int y2)  
        {  
            if (!this.CheckSheet()) return;  
            this._ws.get_Range(this._ws.Cells[x1, y1], this._ws.Cells[x2, y2]).Merge(Type.Missing);  
        }  
 
        /// <summary>  
        /// 將內存中數據表格插入到Excel指定工作表的指定位置 爲在使用模板時控制格式時使用一  
        /// </summary>  
        /// <param name="dt"></param>  
        /// <param name="startX"></param>  
        /// <param name="startY"></param>  
        public void InsertTable(System.Data.DataTable dt, int startX, int startY)  
        {  
            if (!this.CheckSheet()) return;  
 
            for (int i = 0; i <= dt.Rows.Count - 1; i++)  
            {  
                for (int j = 0; j <= dt.Columns.Count - 1; j++)  
                {  
                    this._ws.Cells[startX + i, j + startY] = dt.Rows[i][j].ToString();  
 
                }  
 
            }  
        }  
 
        /// <summary>  
        /// 獲取單元格值  
        /// </summary>  
        /// <param name="cellName"></param>  
        /// <returns></returns>  
        public object GetCellValue(string cellName)  
        {  
            if (!this.CheckSheet()) return null;  
 
            Range range = this._ws.get_Range(cellName, Type.Missing);  
 
            return range.Value2;  
        }  
 
        /// <summary>  
        /// 獲取單元格值  
        /// </summary>  
        /// <param name="row"></param>  
        /// <param name="col"></param>  
        /// <returns></returns>  
        public object GetCellValue(int row, int col)  
        {  
            if (!this.CheckSheet()) return null;  
 
            Range range = (Range)this._ws.Cells[row, col];  
 
            return range.Value2;  
        }  
 
        public string GetStringValue(string cellName)  
        {  
            object val = this.GetCellValue(cellName);  
            string result = "";  
 
            if (val != null) result = val.ToString();  
 
            return result;  
        }  
 
        public string GetStringValue(int row, int col)  
        {  
            object val = this.GetCellValue(row, col);  
            string result = "";  
 
            if (val != null) result = val.ToString();  
 
            return result;  
        }  
 
        public double GetDoubleValue(string cellName)  
        {  
            object val = this.GetCellValue(cellName);  
            string result = "";  
 
            if (val != null) result = val.ToString();  
 
            double number = 0d;  
            if (double.TryParse(result, out number))  
            {  
                number = double.Parse(result);  
            }  
            else  
            {  
                number = 0d;  
            }  
 
            return number;  
        }  
 
        public double GetDoubleValue(int row, int col)  
        {  
            object val = this.GetCellValue(row, col);  
            string result = "";  
 
            if (val != null) result = val.ToString();  
 
            double number = 0d;  
            if (double.TryParse(result, out number))  
            {  
                number = double.Parse(result);  
            }  
            else  
            {  
                number = 0d;  
            }  
 
            return number;  
        }  
         
        #endregion  

    }
}