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string strConnection = "Provider=Microsoft.ACE.OLEDB.12.0;";  
  strConnection += @"Data Source=C:\Documents and Settings\v-changl\My Documents\couse.xlsx;";  
  strConnection += "Extended Properties=\"Excel 12.0 Xml;HDR=YES\";";  
  OleDbConnection objConnection = new OleDbConnection(strConnection);  
  objConnection.Open();  
  OleDbDataAdapter myCommandd = new OleDbDataAdapter("select * from [Sheet1$]", objConnection);  
  DataSet ds = new DataSet();  
  myCommandd.Fill(ds, "[Sheet1$]");  
  System.Data.DataTable dt = ds.Tables["[Sheet1$]"];  
  Console.WriteLine(dt.Columns[0].ToString());  
  Console.WriteLine(dt.Columns[1].ToString());


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string strConn = "Provider=Microsoft.Jet.OLED


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