CExcel 暂时还没有问题 操作类

using System;
using System.Collections.Generic;
using System.Text;
using Excel = Microsoft.Office.Interop.Excel;
using System.Data.OleDb;
using System.Data;
using System.Windows.Forms;

namespace PublicMod
{
    public class CExcel
    {
        /// <summary>
        /// 查询类
        /// </summary>
        /// <param name="excelFile">excel文件完整路径</param>
        public CExcel(string excelFile, string sheetname)
        {
            GC.Collect();
            this.excelFile = excelFile;
            this.sheetName = sheetname;
            try
            {
                excelConString = string.Format("Provider=Microsoft.Jet.OLEDB.4.0; Data Source={0}; Extended Properties='Excel 8.0;imex=1'", excelFile);
                excelConnnection = new OleDbConnection(excelConString);
                app = new Excel.Application();
                //设置禁止弹出保存和覆盖的询问提示框
                app.DisplayAlerts = false;
                app.AlertBeforeOverwriting = false;
                app.UserControl = true;//如果只想用程序控制该excel而不想让用户操作时候，可以设置为false
                workbook = app.Workbooks.Open(excelFile, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);
                workbook.ReadOnlyRecommended  = true;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        /// <summary>
        /// 判断制定的工作簿中的表是否存在
        /// </summary>
        /// <returns></returns>
        public bool HaveSheet()
        {
            //for (int j = 1; j <= workbook.Sheets.Count; j++)
            //{
            //    if (((Excel.Worksheet)workbook.Sheets[j]).Name == sheetName)
            //    {
            //        sMessageBox.Warm("");
            //    }
            //}
            for (int i = 1; i <= workbook.Worksheets.Count; i++)
            {
                if (((Excel.Worksheet)workbook.Worksheets[i]).Name == sheetName)
                {
                    return true;
                }
            }
            return false;
        }
        private string sheetName;
        private string excelFile;
        private string excelConString;
        private Excel.Application app;
        private Excel.Workbook workbook;
        public OleDbConnection excelConnnection;
        /// <summary>
        /// 查询全部数据
        /// </summary>
        /// <returns></returns>
        public DataTable getAllDate()
        {
            DataTable dt = null;
            string sql = string.Format("select * from [{0}$] ", sheetName);
            try
            {
                DataSet ds = new DataSet();
                OleDbDataAdapter adapter = new OleDbDataAdapter(sql, excelConnnection);
                adapter.Fill(ds);
                dt = ds.Tables[0];
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);

            }
            finally
            {
                excelConnnection.Close();
            }
            return dt;
        }
        /// <summary>
        /// 获取excel中有多少行数据
        /// </summary>
        /// <param name="sheetName"></param>
        /// <returns></returns>
        public int rowCount()
        {
            int num = 0;
            string sql = string.Format("select count(*) from [{0}$]", sheetName);
            try
            {
                OleDbCommand command = new OleDbCommand(sql, excelConnnection);
                excelConnnection.Open();
                num = (Int32)command.ExecuteScalar();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
            finally
            {
                excelConnnection.Close();
            }
            return num;
        }
        /// <summary>
        /// 获取excel中有多少列数据
        /// </summary>
        /// <param name="sheetName"></param>
        /// <returns></returns>
        public int columnCount()
        {
            int num = 0;
            string sql = string.Format("select * from [{0}$] ", sheetName);
            try
            {
                OleDbCommand command = new OleDbCommand(sql, excelConnnection);
                excelConnnection.Open();
                OleDbDataReader dr = command.ExecuteReader();
                dr.Read();
                num = dr.FieldCount;
                dr.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);

            }
            finally
            {
                excelConnnection.Close();
            }
            return num;
        }
        /// <summary>
        /// 获取指定单元格的文本
        /// </summary>
        /// <param name="sheetName"></param>
        /// <param name="row"></param>
        /// <param name="col"></param>
        /// <returns></returns>
        public string GetCellStr(int row, int col)
        {
            string str = "";
            try
            {
                Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[sheetName];
                Excel.Range r = (Excel.Range)(worksheet.Cells[row, col]);
                str = r.Text.ToString();
            }
            catch (Exception e)
            {
                MessageBox.Show(e.Message.ToString());
            }
            return str;
        }
        public void Close()
        {
            try
            {
                if (excelConnnection.State == ConnectionState.Open)
                {
                    excelConnnection.Close();
                    excelConnnection.Dispose();
                }
                workbook.Save();
                workbook = null;
                app.Quit();
                System.Runtime.InteropServices.Marshal.ReleaseComObject(app);
                app = null;
                System.GC.Collect();
            }
            catch { }
        }
        /// <summary>
        /// 单元格字体颜色及填充方式
        /// </summary>
        /// <param name="startRow">起始行</param>
        /// <param name="startColumn">起始列</param>
        /// <param name="endRow">结束行</param>
        /// <param name="endColumn">结束列</param>
        /// <param name="color">颜色索引</param>
        public void CellsFontColor(int startRow, int startColumn, int endRow, int endColumn, ColorIndex color)
        {
            Excel.Worksheet myExcel = (Excel.Worksheet)workbook.Worksheets[sheetName];
            Excel.Range range = myExcel.get_Range(myExcel.Cells[startRow, startColumn], myExcel.Cells[endRow, endColumn]);
            range.Font.Color = color;//设置字体颜色
        }
        /// <summary>
        /// 单元格字体颜色及填充方式
        /// </summary>
        /// <param name="row">行</param>
        /// <param name="column">列</param>
        public void CellsFontColor(int row, int column, ColorIndex color)
        {
            Excel.Worksheet myExcel = (Excel.Worksheet)workbook.Worksheets[sheetName];
            Excel.Range range = myExcel.get_Range(myExcel.Cells[row, column], myExcel.Cells[row, column]);
            range.Font.ColorIndex = color;//设置字体颜色
        }
        public void ExcelShow()
        {
            workbook.Save();
            app.Visible = true;
        }
    }
    /// <summary>
    /// 单元格填充方式
    /// </summary>
    public enum Pattern
    {
        Automatic = -4105,
        Checker = 9,
        CrissCross = 16,
        Down = -4121,
        Gray16 = 17,
        Gray25 = -4124,
        Gray50 = -4125,
        Gray75 = -4126,
        Gray8 = 18,
        Grid = 15,
        Horizontal = -4128,
        LightDown = 13,
        LightHorizontal = 11,
        LightUp = 14,
        LightVertical = 12,
        None = -4142,
        SemiGray75 = 10,
        Solid = 1,
        Up = -4162,
        Vertical = -4166
    }

    /// <summary>
    /// 常用颜色定义,对就Excel中颜色名
    /// </summary>
    public enum ColorIndex
    {
        无色= -4142,
        自动= -4105,
        黑色= 1,
        褐色= 53,
        橄榄= 52,
        深绿= 51,
        深青= 49,
        深蓝= 11,
        靛蓝= 55,
        灰色= 56,
        深红= 9,
        橙色= 46,
        深黄= 12,
        绿色= 10,
        青色= 14,
        蓝色= 5,
        蓝灰= 47,
        灰色= 16,
        红色= 3,
        浅橙色= 45,
        酸橙色= 43,
        海绿= 50,
        水绿色= 42,
        浅蓝= 41,
        紫罗兰= 13,
        灰色= 48,
        粉红= 7,
        金色= 44,
        黄色= 6,
        鲜绿= 4,
        青绿= 8,
        天蓝= 33,
        梅红= 54,
        灰色= 15,
        玫瑰红= 38,
        茶色= 40,
        浅黄= 36,
        浅绿= 35,
        浅青绿= 34,
        淡蓝= 37,
        淡紫= 39,
        白色= 2
    }
}