Validation Summary - asp.net

Question

I use a login entrance in my Asp.Net project
And I use validationSummary for User Name and password.
Everything goes well but.
What I want is to know if the ValidationSummary has errors to show me or not before the appearance of the errors window
I use vb.net to build the project
I don't have any code to show. And also I can't find anything relative in on the Internet to assist me on this issue.

Answer 1

You are probably using the ValidationSummary method in your Razor views, which - as per MSDN
Returns an unordered list (ul element) of validation messages in the ModelStateDictionary object.
So, if you want to know if there will be any errors shown by the ValidationSummary method, you can check this ModelStateDictionary in your controller before delivering your response to the browser. Doing this is described i.e. here (in C#).
In your controller method you can access ModelState.IsValid if you want to know if there are any errors which will be displayed.
This does directly answer your question, but this might not be the optimal way to achieve what you want when looking at the bigger picture. If you want to i.e. do something special if the login fails in your controller you should check directly if the login failed, not if some other method added model errors. To provide an answer, which might be more on point, you need to clarify your question and add more details about what you specifically want to do and possibly add some of your code too.

Answer 2

The idea to use the code I post is finally correct.
Public Sub IsGroupValid(ByVal sValidationGroup As String, ByVal sender As Object, ByVal e As EventArgs)
For Each validator As BaseValidator In Validators
If validator.ValidationGroup = sValidationGroup Then
Dim fValid As Boolean = validator.IsValid
Dim CtrlToValidate As String = validator.ControlToValidate
validator.DataBind()
If Not fValid And CtrlToValidate = ServerHandler.UName Then
validator.Validate()
fValid = validator.IsValid
ModelState.AddModelError(CtrlToValidate, validator.ID)
ElseIf Not fValid And CtrlToValidate = "Password" And validator.ID = ServerHandler.PwdRq Then
validator.Validate()
fValid = validator.IsValid
ModelState.AddModelError(CtrlToValidate, validator.ID)
ElseIf Not fValid And CtrlToValidate = "Password" And validator.ID = ServerHandler.PwdRegEx Then
validator.Validate()
fValid = validator.IsValid
ModelState.AddModelError(CtrlToValidate, validator.ID)
End If
End If
Next
End Sub
But has condition that someone or something give him the error list from ValidationSummaryGroup
And this is done with the following code
Public Function LoadModel(ByVal sender As Object, ByVal e As EventArgs) As Boolean
Dim retVal As New Boolean
Try
If Not ModelState.IsValid Then
Dim result As StringBuilder = New StringBuilder()
For Each item In ModelState
Dim key As String = item.Key
Dim errors = item.Value.Errors
For Each [vError] In errors
ModelAnswer.Add(key & "^" & [vError].ErrorMessage)
retVal = True
Next
Next
End If
ModelState.Clear()
Catch ex As Exception
Environment.AssemblyInfo.ErrorAnswer = ServerHandler.ErrHandler.GetError(3, Nothing, Nothing, ex, Nothing)
Environment.AssemblyInfo.ErrorAnswer = Environment.AssemblyInfo.ErrorAnswer & "\r\n ifExistConsistencyRecord "
ServerHandler.ErrProperty._InnerError = Environment.AssemblyInfo.ErrorAnswer
Environment.AssemblyInfo.errorCall = True
retVal = False
End Try
Return retVal
End Function
Of course ModelAnswer is an ArrayList and declared as Public
And all this under the very basic prerequisite, all the processes to work within the main page and NOT in a "class"
Thank you very much for those who helped to solve this puzzle