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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;
        
        DataTable dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
        string SheetName = dt.Rows[0]["TABLE_NAME"].ToString(); //這里就是取得表的名字了

        strExcel = "select * from [" + SheetName + "]";

        myCommand = new OleDbDataAdapter(strExcel, strConn);
        ds = new DataSet();
        myCommand.Fill(ds, "table1");
        myCommand.Dispose();
        conn.Close();
        return ds;
    }