读取数据从XLSX在C＃

Question

我新的C＃和想读在C＃中使用下面的代码的XLSX文件：

string Connection = "Provider=Microsoft.ACE.OLEDB.12.0;DataSource=c:\\Temp\\source.xlsx;Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=1\";"; 

//code to read the content of format file 
OleDbConnection con = new OleDbConnection(Connection); 
OleDbCommand command = new OleDbCommand(); 

DataTable dt = new DataTable(); 
OleDbDataAdapter myCommand = new OleDbDataAdapter("select * from [Tabelle1$]", con); 

myCommand.Fill(dt); 
Console.Write(dt.Rows.Count); 

我获得TA校正从输出计数，但我有2个问题：

1.如何做select select语句（如何访问行）？

select * from [Tabelle1$] where A = '123' (A being an existing Excel row) 

将抛出一个错误提错参数...

2.可有人为我提供的教程链接或简短的样本如何访问数据？

Answer 1

请参考下面的示例代码：

private DataTable LoadXLS(string strFile, String sheetName, String column, String value) 
{ 
    DataTable dtXLS = new DataTable(sheetName); 

    try 
    { 
     string strConnectionString = ""; 

     if(strFile.Trim().EndsWith(".xlsx")) { 

      strConnectionString = string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=\"Excel 12.0 Xml;HDR=YES;IMEX=1\";", strFile); 

     } else if(strFile.Trim().EndsWith(".xls")) { 

      strConnectionString = string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=\"Excel 8.0;HDR=Yes;IMEX=1\";", strFile); 

     } 

     OleDbConnection SQLConn = new OleDbConnection(strConnectionString); 

     SQLConn.Open(); 

     OleDbDataAdapter SQLAdapter = new OleDbDataAdapter(); 

     string sql = "SELECT * FROM [" + sheetName + "$] WHERE " + column + " = " + value; 

     OleDbCommand selectCMD = new OleDbCommand(sql, SQLConn); 

     SQLAdapter.SelectCommand = selectCMD; 

     SQLAdapter.Fill(dtXLS); 

     SQLConn.Close(); 
    } 

    catch (Exception e) 
    { 
     Console.WriteLine(e.ToString()); 
    } 

    return dtXLS; 

}