How to efficiently write to file from SQL datareader in c#?

Question

I have a remote sql connection in C# that needs to execute a query and save its results to the users\'s local hard disk. There is a fairly large amount of data this thing ca

Answer 1

Keeping your original approach, here is a quick win:

Instead of using String as a temporary buffer, use StringBuilder. That will allow you to use the function .append(String) for concatenations, instead of using the operator +=.

The operator += is specially inefficient, so if you place it on a loop and it is repeated (potentially) millions of times, the performance will be affected.

The .append(String) method won't destroy the original object, so it's faster