if (!TryUpdateModel<Event>(evt))
{
// ... I need to retrieve the errors here
}
Sometimes, TryUpdateModel fails to update model. I am not able to find reason and exception?
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StuartLC
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user3667798
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put try catch to see exception – Ehsan Sajjad Jun 03 '14 at 04:45
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I have put code in try catch but when I debug if TryUpdateModel method fails even then it dont moves to catch part – user3667798 Jun 03 '14 at 04:46
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TryUpdateModel returns a bool – Ehsan Sajjad Jun 03 '14 at 04:48
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You will have to use your debugger to inspect the contents of your request in order to figure out what is going on. We can't tell with the information you have provided. – Rune Jun 03 '14 at 04:49
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Is there any way to find out reason why TryUpdateModel fails – user3667798 Jun 03 '14 at 04:58
1 Answers
17
As per the other TryXXX paradigm methods (e.g. TryParse), the TryUpdateModel method returns a bool indicating whether the model was updated successfully or not.
TryUpdateModel updates the ModelState dictionary with a list of errors. If TryUpdateModel fails (as per the bool return), you can iterate these as follows:
var model = new ViewModel();
var isSuccess = TryUpdateModel(model);
if (!isSuccess)
{
foreach (var modelState in ModelState.Values)
{
foreach (var error in modelState.Errors)
{
Debug.WriteLine(error.ErrorMessage);
}
}
}
Otherwise, if you want a hard exception, then use UpdateModel instead.
