用ODBC导入csv文件和txt文件(但是文件的名称中不能有点".")

private void FormImport_Load(object sender, EventArgs e)
{
DataSet dst= subImportCsv_Dataset("d:\\","syncml_contacts.csv");
this.dataGridView1.DataSource=dst.Tables[0];

}
public DataSet subImportCsv_Dataset(string filePath, string fileName)
{
string strConn = @"Driver={Microsoft Text Driver (*.txt; *.csv)};Dbq=";
strConn += filePath;//这个地方只需要目录就可以了
strConn += ";Extensions=asc,csv,tab,txt;";
OdbcConnection objConn = new OdbcConnection(strConn);
DataSet ds = new DataSet();
try
{
string strSQL = "select * from " + fileName;//文件名，不要带目录
OdbcDataAdapter da = new OdbcDataAdapter(strSQL, objConn);
da.Fill(ds);
//开始导入数据库
return ds;
}
catch (Exception ex)
{
throw ex;
}

}