datatable转换为Excel助手类

最新推荐文章于 2023-12-08 23:51:36 发布

转载最新推荐文章于 2023-12-08 23:51:36 发布 · 103 阅读

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原文链接：http://www.cnblogs.com/a1991322/archive/2012/08/22/2650682.html

本文介绍了一个C#类，用于实现Excel文件（包括2007版本）与DataTable之间的相互转换。其中包括从Excel读取数据到DataTable的方法，以及将DataTable的数据导出到Excel文件的功能。

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

namespace OA_Batch
{
    public class ExcelHelper
    {
        /// <summary>
        /// 从excel2007文件中读出dt
        /// </summary>
        /// <param name="fileName"></param>
        /// <returns></returns>
        public System.Data.DataTable ExcelToDataTable(string fileName)
        {
            System.Data.DataTable dt;
            string conStr = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source="+fileName+";Extended Properties='Excel 12.0;HDR=YES;IMEX=1'";
            OleDbConnection myConn = new OleDbConnection(conStr);
            string strCom = " SELECT * FROM [Sheet1$]";
            myConn.Open();
            OleDbDataAdapter myCommand = new OleDbDataAdapter(strCom, myConn);
            dt = new System.Data.DataTable();
            myCommand.Fill(dt);
            myConn.Close();
            return dt;
        }

public void DataTabletoExcel(System.Data.DataTable tmpDataTable, string strFileName)
{

if (tmpDataTable == null)

return;

int rowNum = tmpDataTable.Rows.Count;

int columnNum = tmpDataTable.Columns.Count;

int rowIndex = 1;

int columnIndex = 0;

Application xlApp = new ApplicationClass();

xlApp.DefaultFilePath = "";

xlApp.DisplayAlerts = true;

xlApp.SheetsInNewWorkbook = 1;

Workbook xlBook = xlApp.Workbooks.Add(true);

//将DataTable的列名导入Excel表第一行

foreach (DataColumn dc in tmpDataTable.Columns)
{

columnIndex++;

xlApp.Cells[rowIndex, columnIndex] = dc.ColumnName;

}

//将DataTable中的数据导入Excel中

for (int i = 0; i < rowNum; i++)
{

rowIndex++;

columnIndex = 0;

for (int j = 0; j < columnNum; j++)
{

columnIndex++;

xlApp.Cells[rowIndex, columnIndex] = tmpDataTable.Rows[i][j].ToString();

}

//xlBook.SaveCopyAs(HttpUtility.UrlDecode(strFileName, System.Text.Encoding.UTF8));

xlBook.SaveCopyAs(strFileName);
xlBook.Close(false);

}

转载于:https://www.cnblogs.com/a1991322/archive/2012/08/22/2650682.html