excel2007的读,写,保存操作

最新推荐文章于 2025-12-26 18:48:01 发布

原创最新推荐文章于 2025-12-26 18:48:01 发布 · 2.4k 阅读

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#excel #dataset #null #properties #application #string

本文介绍如何使用C#进行Excel2007的读写操作，包括连接Excel文件、读取数据到DataSet、计算数据并写回Excel等步骤。特别关注了Excel的特殊处理方式，如进程管理、空值处理及下标从1开始的特点。

关于excel2007的读,写操作.

难点:1.excel的进程的杀死.

2.excel的写操作,excel的下标是从1开始的.

3.对excel中空的操作.是DBnull不时null.

using System; using System.Collections.Generic; using System.Text; using System.Data; using System.Data.OleDb; using System.Data.SqlClient; using System.IO; using Microsoft.Office.Interop.Excel; namespace TestAccess { class Program { static void Main(string[] args) { string strConnection = "Provider=Microsoft.ACE.OLEDB.12.0;"; strConnection += @"Data Source=C:/Documents and Settings/v-changl/My Documents/couse.xlsx;"; strConnection += "Extended Properties=/"Excel 12.0 Xml;HDR=YES/";"; OleDbConnection objConnection = new OleDbConnection(strConnection); objConnection.Open(); OleDbDataAdapter myCommandd = new OleDbDataAdapter("select * from [Sheet1$]", objConnection); DataSet ds = new DataSet(); myCommandd.Fill(ds, "[Sheet1$]"); System.Data.DataTable dt = ds.Tables["[Sheet1$]"]; Console.WriteLine(dt.Columns[0].ToString()); Console.WriteLine(dt.Columns[1].ToString()); DataRow drDisplay = dt.Rows[0]; int[] num = new int[dt.Columns.Count]; for (int j = 0; ; ) { for (int i = 0; i < dt.Columns.Count; i++) { if (drDisplay[i] is DBNull) ; else num[i] += Convert.ToInt32(drDisplay[i]); } if (++j >= dt.Rows.Count) break; drDisplay = dt.Rows[j]; } objConnection.Close(); object MissingValue = Type.Missing; Microsoft.Office.Interop.Excel.Application app = new Application(); Microsoft.Office.Interop.Excel.Workbook wbook = app.Workbooks.Open(@"C:/Documents and Settings/v-changl/My Documents/couse.xlsx", MissingValue, MissingValue, MissingValue, MissingValue, MissingValue, MissingValue, MissingValue, MissingValue, MissingValue, MissingValue, MissingValue, MissingValue, MissingValue, MissingValue); Microsoft.Office.Interop.Excel.Worksheet wsheet = wbook.ActiveSheet as Microsoft.Office.Interop.Excel.Worksheet; for (int i = 0; i < dt.Columns.Count; i++) { //注意下面是i+1,,excel小标默认从1开始 wsheet.Cells[dt.Rows.Count + 2, i + 1] = num[i].ToString(); } wbook.Save(); wbook.Close(true, null, null); System.Runtime.InteropServices.Marshal.ReleaseComObject(wsheet); System.Runtime.InteropServices.Marshal.ReleaseComObject(wbook); System.Runtime.InteropServices.Marshal.ReleaseComObject(app); wsheet = null; wbook = null; app = null; GC.Collect(); } } }