NET读取Excel文件的方法【合集三篇】

如何使得ASP.NET读取excel文件更加高效呢，下面小编就来告诉你三种.NET读取Excel文件的方法。

ASP.NET读取Excel文件方法二：引用的com组件：

Microsoft.Office.Interop.Excel.dll读取Excel文件

首先是Excel.dll的获取,将Office安装目录下的Excel.exe文件Copy到DotNet的bin目录下,cmd到该目录下,运行 TlbImp EXCEL.EXE Excel.dll 得到Dll文件。

在项目中添加引用该dll文件.

代码如下:

https://读取EXCEL的方法 (用范围区域读取数据)

private void OpenExcel(string strFileName) {

object missing = System.Reflection.Missing.Value;

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

if (excel == null)

{

Response.Write("");

}

else

{

excel.Visible = false;

excel.UserControl = true; https:// 以只读的形式打开EXCEL文件

Workbook wb = excel.Application.Workbooks.Open(strFileName, missing, true, missing, missing, missing,missing, missing, missing, true, missing, missing, missing, missing, missing); https://取得第一个工作薄

Worksheet ws = (Worksheet)wb.Worksheets.get_Item(1); https://取得总记录行数 (包括标题列)

int rowsint = ws.UsedRange.Cells.Rows.Count; https://得到行数

https://int columnsint = mySheet.UsedRange.Cells.Columns.Count;https://得到列数

https://取得数据范围区域 (不包括标题列)

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

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

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

object[,] arryCus = (object[,])rng2.Value2; https://将新值赋给一个数组

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

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

{

https://Item_Code列

arry[i - 1, 0] =arryItem[i, 1].ToString(); https://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();https://没有更好的方法,只有杀掉进程

}

GC.Collect();

}

ASP.NET读取Excel文件方法一：采用OleDB读取Excel文件：

把Excel文件当做一个数据源来进行数据的读取操作，实例如下：

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;

}

对于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

代码如下:

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：也可进行写入Excel文件，实例如下：

代码如下:

public void DSToExcel(string Path,DataSet oldds) {

https://先得到汇总Excel的DataSet 主要目的是获得Excel在DataSet中的结构

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);

https://QuotePrefix和QuoteSuffix主要是对builder生成InsertComment命令时使用。

builder.QuotePrefix="["; https://获取insert语句中保留字符(起始位置)

builder.QuoteSuffix="]"; https://获取insert语句中保留字符(结束位置)

DataSet newds=new DataSet();

myCommand.Fill(newds ,"Table1") ;

for(int i=0;i

{

https://在这里不能使用ImportRow方法将一行导入到news中，

https://因为ImportRow将保留原来DataRow的所有设置(DataRowState状态不变)。

https://在使用ImportRow后newds内有值，但不能更新到Excel中因为所有导入行的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读取Excel文件方法三：将Excel文件转化成CSV

先引用命名空间:

代码如下:

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();

另外也可以将数据库数据导入到一个txt文件，实例如下：

代码如下:

https://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);

https://OleDbDataReader myreader = mycom.ExecuteReader(); https://也可以用Reader读取数据

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); https://存入到文本文件中

https://把标题写入.txt文件中

https://for (int i = 0; i

https://{

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

https://}

foreach (DataRow dr in dt.Rows)

{

string str0, str1, str2, str3;

string str = "|"; https://数据用"|"分隔开

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(); https://换行

}

strmWriter.Flush();

strmWriter.Close();

if (con.State == ConnectionState.Open)

{

con.Close();

}