使用FileHelpers，如何从上传的Excel文件中提取记录

Question

One of the bundled examples of FileHelpers shows how to extract and insert records from/to a Microsoft Excel Worksheet as follow:

Define a class with members that correspond to the columns in the input Excel file

[DelimitedRecord("|")]
public class CustomersVerticalBar
{
    public string CustomerID;
    public string CompanyName;
    public string ContactName;
    public string ContactTitle;
    public string Address;
    public string City;
    public string Country;
}

Then use ExcelDataStorage to extract records as follow:

ExcelStorage provider = new ExcelStorage(typeof(CustomersVerticalBar));
provider.StartRow = 3;
provider.StartColumn = 2;           
provider.FileName = "Customers.xls";
CustomerVerticalBar[] res = (CustomerVerticalBar[]) provider.ExtractRecords();

The problem is if there's no input Excel file, but the input is only available as an input stream from an uploaded file (from HttpPostedFileBase for example), what would be the solution in such case since ExcelDataStorage only takes a filename as input and not an input stream? It's OK if the solution uses some class other than ExcelDataStorage.

Answer 1

您应该将其写入文件，然后在处理后根据需要将其删除，因为该库可能需要加载部分数据而不是全部数据，并且可能需要多次引用该文件。