是否可以通过closedXml读取非常大的ex​​cel文件（> 500000条记录）的部分工作表？

Question

Problem with opening a large EXCEL file. For example, when I declare XLWorkbook, it's going to load ALL data to this object. I decided to read it partly, because, it's returned an error: outOfMemory. Is it possible to read part with range? Is there any more methods?

Sample:

using ClosedXML.Excel;        
public void FileOpen(string path)
{
   var workBook = new XLWorkbook(path);
// . . .
}

Answer 1

You can use a good ole' OleDbAdapter to select a given range of rows. See an example below where I select the first 10,000 rows (from the sheet "Sheet1") and then later another set of 10,000 rows from an excel file :

    DataSet excelDataSet = new DataSet();
    using (OleDbConnection connection = new System.Data.OleDb.OleDbConnection(connectionString))
    {
         connection.Open();
         OleDbDataAdapter cmd = new OleDbDataAdapter("select * from [Sheet1$1:10000]", connection);
         cmd.Fill(excelDataSet);

...

         OleDbDataAdapter cmd = new OleDbDataAdapter("select * from [Sheet1$10000:20000]", connection);
         connection.Close();
    }