I'm reading in records from a tab-delimited flat-file, and storing those in a
IEnumerable<string[]> Please note that they're are a
large
amount of records.
I want to use Linq to traverse through the IEnumerable records quickly, but return the whole string[] array when I find a value within one of the values of the array.
Current Situation (works fine but a little slow):
private
IEnumerable<string[]> customers = GetCustomersFromCache();
foreach
(string[] customer
in
customers)
var
strFound = Array.FindAll(customer, str => str.ToLower().Contains(searchText.Text.ToLower()));
foreach
(
string
record
in
strFound)
So currently I'm looping through each Customers record, and then looping through each customer record. I can then grab any part of the customer array, and use its' data.
So can Linq be used to look at the string[] within the IEnumerable, determine if any part of the array contains the string I'm searching for, and finally return the whole array?
Which means basically making the following 1 Linq command:
foreach
(string[] customer
in
customers)
var
strFound = Array.FindAll(customer, str => str.ToLower().Contains(searchText.Text.ToLower()));
customers.Where(c => Array.FindAll(c, str => str.ToLower().Contains(searchText.Text.ToLower())).Count() >
0
);
I don't know if it performs any better though.
[Edit]
This is probably a little faster, as it only looks for the first match, enough to tell you if anything is there:
customers.Where(c => !String.IsNullOrEmpty(Array.Find(c, str => str.ToLower().Contains(searchText.Text.ToLower()))));
customers.Where(c => Array.FindAll(c, str => str.ToLower().Contains(searchText.Text.ToLower())).Any());
This will stop the search once the first is found.
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