Set disable attribute based on a condition for Html.TextBoxFor

Question

I want to set disable attribute based on a condition for Html.TextBoxFor in asp.net MVC like below

@Html.TextBoxFor(model => model.ExpireDate, new { style         


        

Answer 1

Is solved this using RouteValueDictionary (works fine as htmlAttributes as it's based on IDictionary) and an extension method:

public static RouteValueDictionary AddIf(this RouteValueDictionary dict, bool condition, string name, object value)
{
    if (condition) dict.Add(name, value);
    return dict;
}

Usage:

@Html.TextBoxFor(m => m.GovId, new RouteValueDictionary(new { @class = "form-control" })
.AddIf(Model.IsEntityFieldsLocked, "disabled", "disabled"))

Credit goes to https://stackoverflow.com/a/3481969/40939

Answer 2

Actually, the internal behavior is translating the anonymous object to a dictionary. So what I do in these scenarios is go for a dictionary:

@{
  var htmlAttributes = new Dictionary<string, object>
  {
    { "class" , "form-control"},
    { "placeholder", "Why?" }        
  };
  if (Model.IsDisabled)
  {
    htmlAttributes.Add("disabled", "disabled");
  }
}
@Html.EditorFor(m => m.Description, new { htmlAttributes = htmlAttributes })

Or, as Stephen commented here:

@Html.EditorFor(m => m.Description,
    Model.IsDisabled ? (object)new { disabled = "disabled" } : (object)new { })

Answer 3

I like Darin method. But quick way to solve this,

Html.TextBox("Expiry", null, new { style = "width: 70px;", maxlength = "10", id = "expire-date", disabled = "disabled" }).ToString().Replace("disabled=\"disabled\"", (1 == 2 ? "" : "disabled=\"disabled\""))

Answer 4

Yet another solution would be to create a Dictionary<string, object> before calling TextBoxFor and pass that dictionary. In the dictionary, add "disabled" key only if the textbox is to be diabled. Not the neatest solution but simple and straightforward.

Answer 5

If you don't use html helpers you may use simple ternary expression like this:

<input name="Field"
       value="@Model.Field" tabindex="0"
       @(Model.IsDisabledField ? "disabled=\"disabled\"" : "")>

Answer 6

if you dont want to use Html Helpers take look it my solution

disabled="@(your Expression that returns true or false")"

that it

@{
    bool isManager = (Session["User"] as User).IsManager;
}
<textarea rows="4" name="LetterManagerNotes" disabled="@(!isManager)"></textarea>

and I think the better way to do it is to do that check in the controller and save it within a variable that is accessible inside the view(Razor engine) in order to make the view free from business logic