如何读取excel的cells中值？

Question

按以下编写
Excel.ApplicationClass ExcelObj= new Excel.ApplicationClass();
Excel.Workbook theWorkbook = ExcelObj.Workbooks.Open("E:\\a.xls", 0, true, 5,"", "", true, Excel.XlPlatform.xlWindows, "\t", false, false,0, true,true,true);
Excel.Sheets sheets = theWorkbook.Worksheets;
Excel.Worksheet worksheet = (Excel.Worksheet)sheets.get_Item(1);
this.label1.Text= worksheet.Cells[2,2].ToString();运行结果：label1中得到的内容为：System.__ComObject，为何这样？

Answer 1

Excel.Range ra = ExcelObj.get_Range(excel.Cells[i + 1, 1], excel.Cells[i + 1, 1]);
string text = ra.Text.ToString();

Answer 2

错了
Excel.Range ra = ExcelObj.get_Range(excel.Cells[2, 2], excel.Cells[2, 2]);
string text = ra.Text.ToString();

Answer 3

我写了一个关于如何将DataView 到处为Excel的静态函数，希望对你有用。
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Windows.Forms;
using Microsoft.Office.Interop.Excel;
using System.Reflection;
namespace ExcelExports
...{
    public class ExcelExports
    ...{
        /**//// <summary>
        /// 把DataGridView到处到Excel中
        /// </summary>
        /// <param name="gridView">目标DataGridView</param>
        /// <param name="fileName">保存文件名称</param>
        /// <param name="isShowExcle">是否显示Excel界面</param>
        /// <returns>导出是否成功</returns>
        public static bool ExportForDataGridview(DataGridView gridView,string fileName,bool isShowExcle)
        ...{
            
            //建立Ｅｘｃｅｌ对象
            Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
            try
            ...{
                if (app == null)
                ...{
                    return false;
                }
                app.Visible = isShowExcle;
                Workbooks workbooks = app.Workbooks;
                _Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet);
                Sheets sheets = workbook.Worksheets;
                _Worksheet worksheet = (_Worksheet)sheets.get_Item(1);
                if (worksheet == null)
                ...{
                    return false;
                }
                string sLen = "";
                //取得最后一列列名
                char H=(char)(64+gridView.ColumnCount /26 );
                char L = (char)(64 + gridView.ColumnCount % 26);
                if (gridView.ColumnCount < 26)
                ...{
                    sLen = L.ToString();
                }
                else
                ...{
                    sLen = H.ToString() + L.ToString();
                }
                //标题
                string sTmp = sLen + "1";
                Range ranCaption = worksheet.get_Range(sTmp, "A1");
                string[] asCaption = new string[gridView.ColumnCount];
                for (int i = 0; i < gridView.ColumnCount; i++)
                ...{
                    asCaption[i] = gridView.Columns[i].HeaderText;
                }
                ranCaption.Value2 = asCaption;                //数据
                object[] obj = new object[gridView.Columns.Count];
                for (int r = 0; r < gridView.RowCount-1; r++)
                ...{
                    for (int l = 0; l < gridView.Columns.Count; l++)
                    ...{
                        if (gridView[l, r].ValueType==typeof(DateTime))
                        ...{
                            obj[l] = gridView[l, r].Value.ToString();
                        }
                        else
                        ...{
                            obj[l] = gridView[l, r].Value;
                        }
                    }
                    string cell1 = sLen + ((int)(r + 2)).ToString();
                    string cell2="A"+((int)(r+2)).ToString();
                    Range ran = worksheet.get_Range(cell1, cell2);
                    ran.Value2 = obj;
                }
                //保存
                workbook.SaveCopyAs(fileName);
                workbook.Saved = true;
            }
            finally
            ...{
                //关闭
                app.UserControl = false;
                app.Quit();
            }
            return true;        }
    }
}