ASP.NET 導入Excel

常常碰到這種需求，為了避免自己每次寫Code都要東翻西找Sample，乾脆丟上來當備份

此外，也為了方便網路上的大大們Copy Paste方便，小弟已經順便標示要複製程式碼的起始結束位置

 

在歡樂的貼程式前

請先注意公司的測試機電腦是否有先做設定

簡單講一下程式碼流程：1.上傳Excel檔。2. ASP.net讀Excel資料，然後Insert into Table。3.把上傳的Excel檔宰掉，避免硬碟空間不夠。

using System;

using System.Collections.Generic;

using System.Web;







/***Copy Start***/

//引用Microsoft Excel相關參考

using Microsoft.Office.Interop;

using Microsoft.Office.Interop.Excel;

//移機時記得Bin底下的Microsoft.Office.Interop.Excel.dll和office.dll等，Excel相關dll也要Copy過去

/***Copy End***/



public class ExcelImport :System.Web.UI.Page

{

    /***Copy Start***/

    //畫面上要先擺一個FileUpload控制項



    /*** Excel Interop reference ***/

    Microsoft.Office.Interop.Excel.Application xlApp = null;

    Workbook wb = null;

    Worksheet ws = null;

    Range aRange = null;

    //*******************************/



    //要上傳Excel檔的Server端 檔案總管目錄

    string upload_excel_Dir = @"D:\web\myWeb\";





    #region 匯入EXCEL

    //按鈕Click事件

    protected void lbtOK_Click(object sender, EventArgs e)

    {

        string excel_filePath = "";

        try

        {

            excel_filePath = SaveFileAndReturnPath();//先上傳EXCEL檔案給Server



            if (this.xlApp == null)

            {

                this.xlApp = new Microsoft.Office.Interop.Excel.Application();

            }

            //打開Server上的Excel檔案

            this.xlApp.Workbooks.Open(excel_filePath, 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);

            this.wb = xlApp.Workbooks[1];//第一個Workbook

            this.wb.Save();



            //從第一個Worksheet讀資料

            SaveOrInsertSheet(excel_filePath, (Worksheet)xlApp.Worksheets[1]);





            

            ClientScript.RegisterClientScriptBlock(typeof(System.Web.UI.Page), "匯入完成", "alert('匯入完成');", true);

            

        }

        catch (Exception ex)

        {

            throw ex;

        }

        finally

        {

            xlApp.Workbooks.Close();

            xlApp.Quit();

            try

            {

                //刪除 Windows工作管理員中的Excel.exe 處理緒.

                System.Runtime.InteropServices.Marshal.ReleaseComObject(this.xlApp);

                System.Runtime.InteropServices.Marshal.ReleaseComObject(this.ws);

                System.Runtime.InteropServices.Marshal.ReleaseComObject(this.aRange);

            }

            catch { }

            this.xlApp = null;

            this.wb = null;

            this.ws = null;

            this.aRange = null;





            //是否刪除Server上的Excel檔

            bool isDeleteFileFromServer = true;

            if (isDeleteFileFromServer)

            {

                System.IO.File.Delete(excel_filePath);

            }





            GC.Collect();

        }

    }

    #endregion



    #region 儲存EXCEL檔案給Server

    private string SaveFileAndReturnPath()

    {

        string return_file_path = "";//上傳的Excel檔在Server上的位置

        if (FileUpload1.FileName != "")

        {

            return_file_path = System.IO.Path.Combine(this.upload_excel_Dir, Guid.NewGuid().ToString() + ".xls");



            FileUpload1.SaveAs(return_file_path);

        }

        return return_file_path;

    }

    #endregion



    #region 把Excel資料Insert into Table

    private void SaveOrInsertSheet(string excel_filename,Worksheet ws)

    {



        //要開始讀取的起始列(微軟Worksheet是從1開始算)

        int rowIndex = 1;



        //取得一列的範圍

        this.aRange = ws.get_Range("A" + rowIndex.ToString(), "C" + rowIndex.ToString());



        //判斷Row範圍裡第1格有值的話，迴圈就往下跑

        while (((object[,])this.aRange.Value2)[1, 1] != null)//用this.aRange.Cells[1, 1]來取值的方式似乎會造成無窮迴圈？

        {

            //範圍裡第1格的值

            string cell1 = ((object[,])this.aRange.Value2)[1, 1] != null ? ((object[,])this.aRange.Value2)[1, 1].ToString() : "";



            //範圍裡第2格的值

            string cell2 = ((object[,])this.aRange.Value2)[1, 2] != null ? ((object[,])this.aRange.Value2)[1, 2].ToString() : "";



            //範圍裡第3格的值

            string cell3 = ((object[,])this.aRange.Value2)[1, 3] != null ? ((object[,])this.aRange.Value2)[1, 3].ToString() : "";

            

            //再對各Cell處理完商業邏輯後，Insert into Table...(略













            //往下抓一列Excel範圍

            rowIndex++;

            this.aRange = ws.get_Range("A" + rowIndex.ToString(), "C" + rowIndex.ToString());

        }





    }

    #endregion



    /***Copy End***/

}