ASP.NET讀取Excel文件方法一：採用OleDB讀取Excel文件：
把Excel文件當做一個數據源來進行數據的讀取操作，實例如下：
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$]";
myCommand = new OleDbDataAdapter(strExcel, strConn);
ds = new DataSet();
myCommand.Fill(ds, "table1");
return ds;
}對於Excel中的表即sheet([sheet1$])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：也可進行寫入Excel文件，實例如下：
public void DSToExcel(string Path, DataSet oldds)
{
//先得到彙總Excel的DataSet 主要目的是獲得Excel在DataSet中的結構
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);
system.Data.OleDb.OleDbCommandBuilder builder = new OleDbCommandBuilder(myCommand);
//QuotePrefix和QuoteSuffix主要是對builder生成InsertComment命令時使用。
builder.QuotePrefix = "["; //獲取insert語句中保留字符（起始位置）
builder.QuoteSuffix = "]"; //獲取insert語句中保留字符（結束位置）
DataSet newds = new DataSet();
myCommand.Fill(newds, "Table1");
for (int i = 0; i < oldds.Tables[0].Rows.Count; i++)
{
//在這裏不能使用ImportRow方法將一行導入到news中，
//因爲ImportRow將保留原來DataRow的所有設置(DataRowState狀態不變)。
//在使用ImportRow後newds內有值，但不能更新到Excel中因爲所有導入行的DataRowState!=Added
DataRow nrow = aDataSet.Tables["Table1"].NewRow();
for (int j = 0; j < newds.Tables[0].Columns.Count; 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,運行 TlbImp EXCEL.EXE Excel.dll 得到Dll文件。
在項目中添加引用該dll文件.
//讀取EXCEL的方法 (用範圍區域讀取數據)
private void OpenExcel(string strFileName)
{
object missing = System.Reflection.Missing.Value;
Application excel = new Application();//lauch excel application
if (excel == null)
{
Response.Write("<script>alert('Can't access excel')</script>");
}
else
{
excel.Visible = false; excel.UserControl = true;
// 以只讀的形式打開EXCEL文件
Workbook wb = excel.Application.Workbooks.Open(strFileName, missing, true, missing, missing, missing,
missing, missing, missing, true, missing, missing, missing, missing, missing);
//取得第一個工作薄
Worksheet ws = (Worksheet)wb.Worksheets.get_Item(1);
//取得總記錄行數 (包括標題列)
int rowsint = ws.UsedRange.Cells.Rows.Count; //得到行數
//int columnsint = mySheet.UsedRange.Cells.Columns.Count;//得到列數
//取得數據範圍區域 (不包括標題列)
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;
//將新值賦給一個數組
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();//沒有更好的方法,只有殺掉進程
}
GC.Collect();
}ASP.NET讀取Excel文件方法三：將Excel文件轉化成CSV（逗號分隔）的文件，用文件流讀取(等價就是讀取一個txt文本文件)。
先引用命名空間:
using System.Text;
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();另外也可以將數據庫數據導入到一個txt文件，實例如下：
//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讀取數據
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
//把標題寫入.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)
{
string str0, str1, str2, str3;
string str = "|"; //數據用"|"分隔開
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();
} ASP.NET讀取Excel文件的方法就向你介紹到這裏，希望對你瞭解ASP.NET讀取Excel文件有所幫助。
本文轉載自http://www.cpbcw.com/article/1047.html