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    學(xué)習(xí)啦 > 學(xué)習(xí)電腦 > 工具軟件 > 辦公軟件學(xué)習(xí) > Excel教程 > Excel2013教程 > NET讀取Excel文件的方法

    NET讀取Excel文件的方法

    時(shí)間: 張偉670 分享

    NET讀取Excel文件的方法

      如何使得ASP.NET讀取Excel文件更加高效呢,下面小編就來(lái)告訴你三種.NET讀取Excel文件的方法。

      ASP.NET讀取Excel文件方法一:采用OleDB讀取Excel文件:

      把Excel文件當(dāng)做一個(gè)數(shù)據(jù)源來(lái)進(jìn)行數(shù)據(jù)的讀取操作,實(shí)例如下:

      public DataSet ExcelToDS(string Path)

      {

      string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source="+ Path +";"+"Extended Properties=Excel 8.0;";

      OleDbConnection conn = new OleDbConnection(strConn);

      conn.Open();

      string strExcel = "";

      OleDbDataAdapter myCommand = null;

      DataSet ds = null;

      strExcel="select * from [sheet1$]";

      myCommand = new OleDbDataAdapter(strExcel, strConn);

      ds = new DataSet(); myCommand.Fill(ds,"table1");

      return ds;

      }

      對(duì)于Excel中的表即sheet([sheet1$])如果不是固定的可以使用下面的方法得到

      代碼如下:

      string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" +"Data Source="+ Path +";"+"Extended Properties=Excel 8.0;";

      OleDbConnection conn = new OleDbConnection(strConn);

      DataTable schemaTable = objConn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables,null);

      string tableName=schemaTable.Rows[0][2].ToString().Trim();

      另外:也可進(jìn)行寫(xiě)入Excel文件,實(shí)例如下:

      代碼如下:

      public void DSToExcel(string Path,DataSet oldds) {

      //先得到匯總Excel的DataSet 主要目的是獲得Excel在DataSet中的結(jié)構(gòu)

      string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source ="+path1+";Extended Properties=Excel 8.0" ;

      OleDbConnection myConn = new OleDbConnection(strCon) ;

      string strCom="select * from [Sheet1$]";

      myConn.Open ( ) ;

      OleDbDataAdapter myCommand = new OleDbDataAdapter ( strCom, myConn ) ;

      ystem.Data.OleDb.OleDbCommandBuilder builder=new OleDbCommandBuilder(myCommand);

      //QuotePrefix和QuoteSuffix主要是對(duì)builder生成InsertComment命令時(shí)使用。

      builder.QuotePrefix="["; //獲取insert語(yǔ)句中保留字符(起始位置)

      builder.QuoteSuffix="]"; //獲取insert語(yǔ)句中保留字符(結(jié)束位置)

      DataSet newds=new DataSet();

      myCommand.Fill(newds ,"Table1") ;

      for(int i=0;i

      {

      //在這里不能使用ImportRow方法將一行導(dǎo)入到news中,

      //因?yàn)镮mportRow將保留原來(lái)DataRow的所有設(shè)置(DataRowState狀態(tài)不變)。

      //在使用ImportRow后newds內(nèi)有值,但不能更新到Excel中因?yàn)樗袑?dǎo)入行的DataRowState!=Added

      DataRow nrow=aDataSet.Tables["Table1"].NewRow();

      for(int j=0;j

      {

      nrow[j]=oldds.Tables[0].Rows[i][j];

      }

      newds.Tables["Table1"].Rows.Add(nrow);

      }

      myCommand.Update(newds,"Table1");

      myConn.Close();

      }

      ASP.NET讀取Excel文件方法二:引用的com組件:

    Microsoft.Office.Interop.Excel.dll讀取Excel文件

      首先是Excel.dll的獲取,將Office安裝目錄下的Excel.exe文件Copy到DotNet的bin目錄下,cmd到該目錄下,運(yùn)行 TlbImp EXCEL.EXE Excel.dll 得到Dll文件。

      在項(xiàng)目中添加引用該dll文件.

      代碼如下:

      //讀取EXCEL的方法 (用范圍區(qū)域讀取數(shù)據(jù))

      private void OpenExcel(string strFileName) {

      object missing = System.Reflection.Missing.Value;

      Application excel = new Application();//lauch excel application

      if (excel == null)

      {

      Response.Write("");

      }

      else

      {

      excel.Visible = false;

      excel.UserControl = true; // 以只讀的形式打開(kāi)EXCEL文件

      Workbook wb = excel.Application.Workbooks.Open(strFileName, missing, true, missing, missing, missing,missing, missing, missing, true, missing, missing, missing, missing, missing); //取得第一個(gè)工作薄

      Worksheet ws = (Worksheet)wb.Worksheets.get_Item(1); //取得總記錄行數(shù) (包括標(biāo)題列)

      int rowsint = ws.UsedRange.Cells.Rows.Count; //得到行數(shù)

      //int columnsint = mySheet.UsedRange.Cells.Columns.Count;//得到列數(shù)

      //取得數(shù)據(jù)范圍區(qū)域 (不包括標(biāo)題列)

      Range rng1 = ws.Cells.get_Range("B2", "B" + rowsint); //item

      Range rng2 = ws.Cells.get_Range("K2", "K" + rowsint); //Customer

      object[,] arryItem= (object[,])rng1.Value2; //get range's value

      object[,] arryCus = (object[,])rng2.Value2; //將新值賦給一個(gè)數(shù)組

      string[,] arry = new string[rowsint-1, 2];

      for (int i = 1; i <= rowsint-1; i++)

      {

      //Item_Code列

      arry[i - 1, 0] =arryItem[i, 1].ToString(); //Customer_Name列

      arry[i - 1, 1] = arryCus[i, 1].ToString();

      }

      Response.Write(arry[0, 0] + " / " + arry[0, 1] + "#" + arry[rowsint - 2, 0] + " / " + arry[rowsint - 2, 1]); }

      excel.Quit();

      excel = null;

      Process[] procs = Process.GetProcessesByName("excel");

      foreach (Process pro in procs)

      {

      pro.Kill();//沒(méi)有更好的方法,只有殺掉進(jìn)程

      }

      GC.Collect();

      }

      ASP.NET讀取Excel文件方法三:將Excel文件轉(zhuǎn)化成CSV

      先引用命名空間:

      代碼如下:

      using System.Text;和using System.IO;

      FileStream fs = new FileStream("d:\Customer.csv", FileMode.Open, FileAccess.Read, FileShare.None);

      StreamReader sr = new StreamReader(fs, System.Text.Encoding.GetEncoding(936));

      string str = "";

      string s = Console.ReadLine();

      while (str != null)

      {

      str = sr.ReadLine();

      string[] xu = new String[2];

      xu = str.Split(',');

      string ser = xu[0];

      string dse = xu[1];

      if (ser == s)

      {

      Console.WriteLine(dse);break;

      }

      }

      sr.Close();

      另外也可以將數(shù)據(jù)庫(kù)數(shù)據(jù)導(dǎo)入到一個(gè)txt文件,實(shí)例如下:

      代碼如下:

      //txt文件名

      string fn = DateTime.Now.ToString("yyyyMMddHHmmss") + "-" + "PO014" + ".txt"; OleDbConnection con = new OleDbConnection(conStr); con.Open(); string sql = "select ITEM,REQD_DATE,QTY,PUR_FLG,PO_NUM from TSD_PO014"; OleDbCommand mycom = new OleDbCommand("select * from TSD_PO014", mycon);

      //OleDbDataReader myreader = mycom.ExecuteReader(); //也可以用Reader讀取數(shù)據(jù)

      DataSet ds = new DataSet();

      OleDbDataAdapter oda = new OleDbDataAdapter(sql, con);

      oda.Fill(ds, "PO014");

      DataTable dt = ds.Tables[0];

      FileStream fs = new FileStream(Server.MapPath("download/" + fn), FileMode.Create, FileAccess.ReadWrite);

      StreamWriter strmWriter = new StreamWriter(fs); //存入到文本文件中

      //把標(biāo)題寫(xiě)入.txt文件中

      //for (int i = 0; i

      //{

      // strmWriter.Write(dt.Columns[i].ColumnName + " ");

      //}

      foreach (DataRow dr in dt.Rows)

      {

      string str0, str1, str2, str3;

      string str = "|"; //數(shù)據(jù)用"|"分隔開(kāi)

      str0 = dr[0].ToString();

      str1 = dr[1].ToString();

      str2 = dr[2].ToString();

      str3 = dr[3].ToString();

      str4 = dr[4].ToString().Trim();

      strmWriter.Write(str0);

      strmWriter.Write(str);

      strmWriter.Write(str1);

      strmWriter.Write(str);

      strmWriter.Write(str2);

      strmWriter.Write(str);

      strmWriter.Write(str3);

      strmWriter.WriteLine(); //換行

      }

      strmWriter.Flush();

      strmWriter.Close();

      if (con.State == ConnectionState.Open)

      {

      con.Close();

      }

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