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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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