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Use Linq to entities to filter on alpha and numeric values
Posted on 2012-03-20
I have the following code in my method
MyListViewModel viewModel = new MyListViewModel {
MyList= repository.MyList
.Where(m=> alphaFilter == (string)null || m.Title.StartsWith(alphaFi
this filters the list based on the first character in the string. It works perfectly if the value passed as alphaFilter matches the first character of a the m.title.
My problem is that i want an alpha character to filter on the same character, but i want to be able to pass a "#" character and retrieve all entries that start with a numeric value.
in other words, i want my select list of alphaFilter characters to look like this...
# A B C D
not
1 2 3 4 5 6 7 8 9 0 A B C D
I know there is probably an easy solution, but i'm having trouble finding it. Any help would be much appreciated
MyListViewModel viewModel = new MyListViewModel {
MyList= repository.MyList
.Where(m=> alphaFilter == (string)null || m.Title.StartsWith(alphaFi
this filters the list based on the first character in the string. It works perfectly if the value passed as alphaFilter matches the first character of a the m.title.
My problem is that i want an alpha character to filter on the same character, but i want to be able to pass a "#" character and retrieve all entries that start with a numeric value.
in other words, i want my select list of alphaFilter characters to look like this...
# A B C D
not
1 2 3 4 5 6 7 8 9 0 A B C D
I know there is probably an easy solution, but i'm having trouble finding it. Any help would be much appreciated
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2 Comments
What is alphaFilter and how you are populating it. It seems to be string. If so, the posted code won't work if it has more than one characters i.e. alphaFilter = "A" would work but alphaFilter = "AB" won't. Have you tested it for that?
For the digits, you could always do
and then it would work if the rest of the code works.
For the digits, you could always do
alphaFilter = alphaFilter.Replace("#", "1234567890");
and then it would work if the rest of the code works.
string alphaFilter = "AB#";
alphaFilter = alphaFilter.Replace("#", "1234567890");
.Where(m=> alphaFilter == null || alphaFilter.Contains(m.Title.Substring(0, 1)))
it was being populated by .Select(x=>x.Title.Substri
as for the answer... that's exactly what i needed and I don't believe that i didn't see it myself. Like i said, a simple answer that i was just missing. Thanks for the help.
as for the answer... that's exactly what i needed and I don't believe that i didn't see it myself. Like i said, a simple answer that i was just missing. Thanks for the help.
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