C# 讀取excel

//限.xlsx
string filePath = @"C:\Documents and Settings\USER\桌面\各縣市彙整.xlsx";
strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + ";Extended Properties=\"Excel 12.0 Xml;HDR=YES\";";
OleDbConnection conn = new OleDbConnection(strConn);
OleDbDataAdapter oleDBdataAdapter = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", strConn);
DataSet dataSet = new DataSet();
oleDBdataAdapter.Fill(dataSet);