String MinLength and MaxLength validation don t work asp net mvc

Question

I have this class  using System ComponentModel DataAnnotations  using Argussoft BI DAL Domain Users   namespace Argussoft BI DAL DTOs UserDTOs       public class CreateUserDto                Required ErrorMessage                              MaxLength User EmailLength  ErrorMessage                              40                      RegularExpression User NameRegularExpression  ErrorMessage                                                                                            public string Name   get  set              Required ErrorMessage            Email             MaxLength User EmailLength  ErrorMessage                                                100                      RegularExpression User EmailRegularExpression  ErrorMessage                                                          public virtual string Email   get  set              Required ErrorMessage                                         MaxLength User FullNameLength  ErrorMessage                                          100                      RegularExpression User NameRegularExpression  ErrorMessage                                                                                                       public virtual string FullName   get  set             public virtual int Role   get  set              RegularExpression User PhoneRegularExpression  ErrorMessage                                                 public virtual string Phone   get  set             public virtual int Status   get  set              Required ErrorMessage                               MinLength User PasswordMinLength  ErrorMessage                             5                      MaxLength User PasswordMaxLength  ErrorMessage                              20                      RegularExpression User PasswordRegularExpression  ErrorMessage                                                                                             public virtual string Password   get  set              and this form      model Argussoft BI DAL DTOs UserDTOs CreateUserDto   using  Ajax BeginForm  CreateUser    User   new AjaxOptions   OnSuccess    onSuccessCreateUser     new   id    dialog form    class    form-horizontal             lt div class  modal-header  gt           lt button type  button  class  close  data-dismiss  modal  aria-hidden  true  gt  amp times  lt  button gt           lt h4 gt                       lt  h4 gt       lt  div gt       lt div class  modal-body  gt            lt  -- Name -- gt           lt div class  control-group  gt               lt label class  control-label  for   Html NameFor model   gt  model Name   gt       lt  label gt               lt div class  controls  gt                   lt div class  input-prepend  gt                       Html TextBoxFor model   gt  model Name  new    class    span3   id    input name                          lt br   gt                       Html ValidationMessageFor model   gt  model Name                   lt  div gt               lt  div gt           lt  div gt            lt  -- Email -- gt           lt div class  control-group  gt               lt label class  control-label  for   Html NameFor model   gt  model Email   gt Email lt  label gt               lt div class  controls  gt                   lt div class  input-prepend  gt                       Html TextBoxFor model   gt  model Email  new    class    span3   id    input email                          lt br   gt                       Html ValidationMessageFor model   gt  model Email                   lt  div gt               lt  div gt           lt  div gt            lt  -- FullName -- gt           lt div class  control-group  gt               lt label class  control-label  for   Html NameFor model   gt  model FullName   gt                  lt  label gt               lt div class  controls  gt                   lt div class  input-prepend  gt                       Html TextBoxFor model   gt  model FullName  new    class    span3   id    input full name                          lt br   gt                       Html ValidationMessageFor model   gt  model FullName                   lt  div gt               lt  div gt           lt  div gt            lt  -- Role -- gt           lt div class  control-group  gt               lt label class  control-label  for   Html NameFor model   gt  model Role   gt                   lt  label gt               lt div class  controls  gt                   lt div class  input-prepend  gt                       Html DropDownList  Role    SelectList ViewBag Roles new id   input role                         lt br   gt                       Html ValidationMessageFor model   gt  model Role                   lt  div gt               lt  div gt           lt  div gt            lt  -- Phone -- gt           lt div class  control-group  gt               lt label class  control-label  for   Html NameFor model   gt  model Phone   gt                    lt  label gt               lt div class  controls  gt                   lt div class  input-prepend  gt                       Html TextBoxFor model   gt  model Phone  new    class    span3   id    input phone                          lt br   gt                       Html ValidationMessageFor model   gt  model Phone                   lt  div gt               lt  div gt           lt  div gt            lt  -- Status -- gt           lt div class  control-group  gt               lt label class  control-label  for   Html NameFor model   gt  model Status   gt                     lt  label gt               lt div class  controls  gt                   lt div class  input-prepend  gt                       Html DropDownList  Status    SelectList ViewBag UserStatuses new id   input status                         lt br   gt                       Html ValidationMessageFor model   gt  model Status                   lt  div gt               lt  div gt           lt  div gt            lt  -- Password -- gt           lt div class  control-group  gt               lt label class  control-label  for   Html NameFor model   gt  model Password   gt                     lt  label gt               lt div class  controls  gt                   lt div class  input-prepend  gt                       Html TextBoxFor model   gt  model Password  new    class    span3   id    input password                          lt br   gt                       Html ValidationMessageFor model   gt  model Password                   lt  div gt               lt  div gt           lt  div gt        lt  div gt       lt div class  modal-footer  gt           lt a href   Url Action  UserIndex    User    class  btn  gt          lt  a gt           lt button type  submit  id  save button  class  btn btn-primary  gt           lt  button gt       lt  div gt      User class   public class User   BaseEntity         public const int NameLength   40       public const int PasswordMinLength   5       public const int PasswordMaxLength   20       public const int FullNameLength   100       public const int EmailLength   100       public const int PhoneLength   40            but my validation works only for Required and RegularExpression and doesn t work for MinLength and MaxLength and I don t get any error message in this case     What can be a reason

User · Answer

Try using this attribute  for example for password min length    StringLength 100  ErrorMessage                              20            MinimumLength   User PasswordMinLength

User · Answer

MaxLength is used for the Entity Framework to decide how large to make a string value field when it creates the database   From MSDN      Specifies the maximum length of array   or string data allowed in a property    StringLength is a data annotation that will be used for validation of user input   From MSDN      Specifies the minimum and maximum   length of characters that are allowed   in a data field    Non Customized  Use  String Length    RegularExpression      3      ErrorMessage    Minimum 3 characters required     Required ErrorMessage    Required     StringLength 30  MinimumLength   3  ErrorMessage    Maximum 30 characters         30 is the Max Length Minimum length    3   Customized StringLengthAttribute Class  public class MyStringLengthAttribute   StringLengthAttribute       public MyStringLengthAttribute int maximumLength            base maximumLength                   public override bool IsValid object value                string val   Convert ToString value           if  val Length  lt  base MinimumLength              base ErrorMessage    Minimum length should be 3           if  val Length  gt  base MaximumLength              base ErrorMessage    Maximum length should be 6           return base IsValid value            public class MyViewModel        MyStringLength 6  MinimumLength   3       public String MyProperty   get  set

User · Answer

This can replace the MaxLength and the MinLength   StringLength 40  MinimumLength   10   ErrorMessage    Password cannot be longer than 40 characters and less than 10 characters

User · Answer

StringLength 16  ErrorMessageResourceName   PasswordMustBeBetweenMinAndMaxCharacters   ErrorMessageResourceType   typeof Resources Resource   MinimumLength   6        Display Name    Password   ResourceType   typeof Resources Resource        public string Password   get  set      Save resource like this   ThePasswordMustBeAtLeastCharactersLong     The password must be  1  at least  2  characters long

User · Answer

They do now  with latest version of MVC  and jquery validate packages   mvc51-release-notes Unobtrusive  Thanks to this answer for pointing it out

[c#] String MinLength and MaxLength validation don't work (asp.net mvc)

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