How do you get a list of all ModelState error messages? I found this code to get all the keys: ( Returning a list of keys with ModelState errors)
var errorKeys = (from item in ModelState
where item.Value.Errors.Any()
select item.Key).ToList();
But how would I get the error messages as a IList or IQueryable?
I could go:
foreach (var key in errorKeys)
{
string msg = ModelState[error].Errors[0].ErrorMessage;
errorList.Add(msg);
}
But thats doing it manually - surely there is a way to do it using LINQ? The .ErrorMessage property is so far down the chain that I don't know how to write the LINQ...
ベストアンサー1
You can put anything you want to inside the select clause:
var errorList = (from item in ModelState
where item.Value.Errors.Any()
select item.Value.Errors[0].ErrorMessage).ToList();
EDIT: You can extract multiple errors into separate list items by adding a from clause, like this:
var errorList = (from item in ModelState.Values
from error in item.Errors
select error.ErrorMessage).ToList();
Or:
var errorList = ModelState.Values.SelectMany(m => m.Errors)
.Select(e => e.ErrorMessage)
.ToList();
2nd EDIT: You're looking for a Dictionary<string, string[]>:
var errorList = ModelState.ToDictionary(
kvp => kvp.Key,
kvp => kvp.Value.Errors.Select(e => e.ErrorMessage).ToArray()
);