ASP NET MVC Dropdown List From SelectList

Question

I am building the following SelectList in my controller   var u   new NewUser     u UserTypeOptions   new SelectList new List lt SelectListItem gt        new SelectListItem   Selected   true  Text   string Empty  Value    -1        new SelectListItem   Selected   false  Text    Homeowner   Value     int UserType Homeowner  ToString         new SelectListItem   Selected   false  Text    Contractor   Value     int UserType Contractor  ToString          return u    And displaying it on my view like this    Html DropDownListFor m   gt  m UserType  Model UserTypeOptions    It looks like I am giving it a valid set of SelectListItems in what should be a pretty straightforward dropdown list  but instead of getting a valid  lt option gt  list with good values and text  I get this    lt select data-val  true  data-val-range  A user type must be selected   data-val-range-max  2  data-val-range-min  1  data-val-required  The UserType field is required   id  UserType  name  UserType  class  input-validation-error  gt       lt option gt System Web Mvc SelectListItem lt  option gt       lt option gt System Web Mvc SelectListItem lt  option gt       lt option gt System Web Mvc SelectListItem lt  option gt   lt  select gt    What gives   As far as I can tell  this should work

User · Answer

Just try this in razor         var selectList   new SelectList          new List lt SelectListItem gt                        new SelectListItem  Text    Google   Value    Google                new SelectListItem  Text    Other   Value    Other                Value    Text        and then   Html DropDownListFor m   gt  m YourFieldName  selectList   Default label   new    class    css-class       or   Html DropDownList  ddlDropDownList   selectList   Default label   new    class    css-class

User · Answer

You are missing setting what field is the Text and Value in the SelectList itself  That is why it does a  ToString   on each object in the list  You could think that given it is a list of SelectListItem it should be smart enough to detect this    but it is not   u UserTypeOptions   new SelectList      new List lt SelectListItem gt                new SelectListItem   Selected   true  Text   string Empty  Value    -1            new SelectListItem   Selected   false  Text    Homeowner   Value     int UserType Homeowner  ToString             new SelectListItem   Selected   false  Text    Contractor   Value     int UserType Contractor  ToString             Value     Text   1     BTW  you can use a list of array of any type    and then just set the name of the properties that will act as Text and Value   I think it is better to do it like this   u UserTypeOptions   new SelectList      new List lt SelectListItem gt                new SelectListItem   Text    Homeowner   Value     int UserType Homeowner  ToString             new SelectListItem   Text    Contractor   Value     int UserType Contractor  ToString             Value     Text      I removed the -1 item  and the setting of each items selected true false   Then  in your view    Html DropDownListFor m   gt  m UserType  Model UserTypeOptions   Select one     This way  if you set the  Select one  item  and you don t set one item as selected in the SelectList  the UserType will be null  the UserType need to be int      If you need to set one of the SelectList items as selected  you can use   u UserTypeOptions   new SelectList options   Value     Text   userIdToBeSelected

User · Answer

Try this  just an example   u UserTypeOptions   new SelectList new                 new   ID  1   Name  name1             new   ID  2   Name  name2             new   ID  3   Name  name3             ID    Name   1     Or  u UserTypeOptions   new SelectList new List lt SelectListItem gt                new SelectListItem   Selected   true  Text   string Empty  Value    -1            new SelectListItem   Selected   false  Text    Homeowner   Value    2            new SelectListItem   Selected   false  Text    Contractor   Value    3           Value   Text

[c#] ASP.NET MVC Dropdown List From SelectList

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