最近研究了如何使得ASP.NET讀取Excel文件更加高效呢，現(xiàn)總結(jié)如下：

　　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

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：

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<oldds.Tables[0].Rows.Count;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

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

 ; for(int j=0;j<newds.Tables[0].Columns.Count;j++)

   {

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

   }

   newds.Tables["Table1&quot;].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.

//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)

     {

      &nbsp;  Response.Write("<script>alert('Can't access excel')</script>");

     }

    else

     {

         excel.Visible = false;   excel.UserControl = true;

       &nbsp;// 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);

     &nbsp;  //取得第一個(gè)工作薄

         Worksheet ws = (Worksheet)wb.Worksheets.get_Item(1);

&nbsp;     &nbsp; //取得總記錄行數(shù)    (包括標(biāo)題列)

 &nbsp;      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 &nbsp; (不包括標(biāo)題列)  

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

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

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

      &nbsp;  object[,] arryCus = (object[,])rng2.Value2;   

 &nbsp;      //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++)

&nbsp;        {

 &nbsp;    ;      //Item_Code列

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

 ;           //Customer_Name列

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

      &nbsp;  }

         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)

     {

&nbsp;        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（逗號(hào)分隔）的文件，用文件流讀取(等價(jià)就是讀取一個(gè)txt文本文件)。

先引用命名空間:

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 = "&quot;;

  &nbsp;       string s = Console.ReadLine();

       &nbsp;  while (str != null)

           {  ;   str = sr.ReadLine();

               string[] xu = new String[2];

        &nbsp;       xu = str.Split(',');

       &nbsp;       string ser = xu[0];

               string dse = xu[1];      &nbsp; ;        if (ser == s)

                {   Console.WriteLine(dse);break;

     &nbsp;          }

     ;      }    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：

//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
(&quot;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 <dt.Columns.Count;i++)

//{

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

//}

foreach (DataRow dr in dt.Rows)

{

 &nbsp;  string str0, str1, str2, str3;

&nbsp;   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();

&nbsp;    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();

}

ASP.NET讀取Excel文件的方法就向你介紹到這里，希望對(duì)你了解ASP.NET讀取Excel文件有所幫助。