为什么返回的DataTable在FileHelpers中具有只读列 [英] Why does the returned DataTable has readonly columns in FileHelpers

问题描述

我想知道为什么 filehelpers 返回只读列.

I am wondering why filehelpers return readonly columns.

我对他们有很大的疑问无法更新值，也无法找出原因.现在，我必须再遍历所有列并将其更改为非只读.

I had a huge problem with them not updating values and could not figure out why. Now I have to have another loop to go through all the columns and change them to be not readonly.

有没有一种方法可以告诉Filehelpers不要这样做?因此，我不必浪费时间再次进行所有操作吗?

Is there a way I can tell Filehelpers to not do this? So I don't have to waste time going through all of it again?

推荐答案

FileHelpers类 RecordOperations.CreateEmptyDataTable()方法对此负责，它不是虚拟的.

The FileHelpers class RecordOperations.CreateEmptyDataTable() method is responsible for this and it is not virtual.

我认为原因可能与通过 DataTable.Load(IReader)使用普通的 DataReader 类似，这也会创建只读行.

I think the reason might be that it is similar to using a normal DataReader via DataTable.Load(IReader) which would also create readonly rows.

但是，很容易通过遍历列而不是行来解决:

However, it is easy to fix by going through the columns instead of the rows:

foreach (DataColumn col in dt.Columns) 
    col.ReadOnly = false;

这篇关于为什么返回的DataTable在FileHelpers中具有只读列的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！