今天是我注冊博客園的日子，不知道寫什么才好．就寫下工作中遇到的事情．
　　在.net中讀excel文件的代碼網上是多之又多，當初在網上搜索了一段，用的是OLEDB方法，我也不例外，但客戶多次向我公司反映，導入的數據，明明是有值的，但顯示為空．說不能識別文本文字，只能識別數字類型．測試了又測試，在連接字符串中加上＂Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filePath + ";Extended　Properties=\"Excel 8.0;HDR=YES;IMEX=1＂，說是可以解決混合類型．但是，實際上，還是不能解決問題．后來，我發現，如果，第一行第一列的數據是數字類型，第二行第一列的數據是文本類型，這時，就會顯示不出第二行第一列的數據，它是一個空值．若是第一行第一列的數據是文本類型，第二行第一列的數據是數字類型，將會正常顯示．后來，我又發現，改HDR=ＮＯ;這時，不管是數字類型還是文本類型，都能正常讀出．但是它第一行顯示的格式是這樣的：Ｆ１，Ｆ２．．第二行顯示的才是列名．
　　　最后，網上很多說用?Excel.Application讀，但是速度很慢，為了能讀得出數據，不丟失數據，只好先用這個方法了．．
代碼如下：

using System;
using System.Collections.Generic;
using System.Text;
using Excel = Microsoft.Office.Interop.Excel;
using System.Runtime.InteropServices;
using Microsoft.Office.Interop.Excel;
using System.Data;
namespace Baolida.Shared.Common
{
??? public class ExcelOperate
??? {
??????? [DllImport("User32.dll", CharSet = CharSet.Auto)]
??????? public static extern int GetWindowThreadProcessId(IntPtr hwnd, out?? int ID);
??????? public System.Data.DataTable ReadExcelData(string path)
??????? {

??????????? Excel.Application exc = null;
??????????? Workbooks workBooks = null;
??????????? Workbook workBook = null;
??????????? Worksheet workSheet = null;
??????????? string strValue = "";
??????????? Excel.Range r = null;
??????????? System.Data.DataTable dt = new System.Data.DataTable();
??????????? DataRow myRow;
??????????? object oMissing = System.Reflection.Missing.Value;
??????????? try
??????????? {

??????????????? exc = new Excel.Application();
??????????????? exc.UserControl = true;
??????????????? exc.Application.Workbooks.Open(path, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing, oMissing);
??????????????? workBooks = exc.Workbooks;
??????????????? workBook = workBooks[1];
??????????????? workSheet = (Worksheet)workBook.Worksheets[1];

??????????????? int colCount = workSheet.UsedRange.Columns.Count; //獲得列數
??????????????? int rowCount = workSheet.UsedRange.Rows.Count; //獲得行數

??????????????? //獲取字段名稱
??????????????? for (int k = 1; k <= colCount; k++)
??????????????? {
??????????????????? r = (Excel.Range)workSheet.Cells[1, k];
???????????????????
??????????????????? strValue = r.Text.ToString().Trim();
??????????????????? dt.Columns.Add(strValue, System.Type.GetType("System.String"));
??????????????? }

??????????????? //獲取內容
??????????????? for (int i = 2; i <= rowCount; i++)
??????????????? {

??????????????????? myRow = dt.NewRow();
??????????????????? for (int j = 1; j <= colCount; j++)
??????????????????? {

??????????????????????? //取excel單元格中的值
??????????????????????? r = (Excel.Range)workSheet.Cells[i, j];
??????????????????????? strValue = r.Text.ToString().Trim();
??????????????????????? myRow[j - 1] = strValue;
??????????????????? }
???????????????
??????????????????? dt.Rows.Add(myRow);
??????????????? }

??????????????? //關閉當前的excel進程
??????????????? exc.Application.Workbooks.Close();
??????????????? exc.Quit();
??????????????? System.Runtime.InteropServices.Marshal.ReleaseComObject(exc);
??????????????? exc = null;
??????????????? IntPtr t = new IntPtr(exc.Hwnd);
??????????????? int kid = 0;
??????????????? GetWindowThreadProcessId(t, out kid);
??????????????? System.Diagnostics.Process p = System.Diagnostics.Process.GetProcessById(kid);
??????????????? p.Kill();
??????????? }
??????????? catch { }
??????????? return dt;
??????? }

??? }
}

轉載于:https://www.cnblogs.com/cylx00/archive/2008/05/23/1205868.html

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