So I have two cases that work independantly.
If I know I have model data in the dropdown, I use this code.
#Html.DropDownListFor(model => model.CarID, (SelectList)ViewBag.Cars, htmlAttributes: new { #class = "form-control" })
HOWEVER, the problem with this, if CarID is null the first item on the list will be the pre selected in the dropdown.
And in another form, I use this one:
#Html.DropDownListFor(model => model.CarID, "--Select a Car--", (SelectList)ViewBag.Cars, htmlAttributes: new { #class = "form-control" })
My Controller has this to provide the view data:
ViewBag.Cars = new SelectList(db.Units, "CarID", "Name", model.CarID);
Is there ONE of these that I can use where it will have a placeholder ONLY if model data is not present to fill the spot?
In your second approach, you are using the helper method incorrectly,
It should be
#Html.DropDownListFor(model => model.CarID,(SelectList)ViewBag.Cars,
"Select one", new { #class = "form-control" })
This will render the dropdown with a "Select one" option as the first (and default item), if nothing is pre selected (model.CarID is null). If Model.CarID has a valid value, It will select the corresponding option.
If you absolutely want to remove the "Select one" when Model.CarID is not null, you can write some javascript which executes on the document load (jQuery document ready :) ) to check the selected option and remove it as needed.
Related
I am using Html.TextBoxFor to set and display dates from Model. They work fine when setting the values, however when I retrieve values from the database, they do not display the dates:
Here is my HTML:
#Html.TextBoxFor(x=>x.effectiveDate, "Select Effective Date", new {#class="date form-control", id= "reqEffectiveDate" })
If I switch to #Html.EditorFor, the dates display, but the element no longer displays like the other "form-control" elements on the page, and clicking in the box no longer displays the datepicker:
EditorFor doesn't apply any CSS classes by default, unless you have defined a custom editor template.
You need to pass a collection of HTML attributes to the editor:
#Html.EditorFor(x => x.effectiveDate, new { htmlAttributes = new { #class = "date form-control", id = "reqEffectiveDate" } })
I am trying to remove google autocomplete(google showing previously entered data) on an HTML editorfor, but I have not yet found the correct solution.
I am creating an asp.Net Mvc5 app.
One solution I have seen is to add a name using the Guid generator.
I have tried adding this to Html editorFor which helped remove googles suggestions, however, any data that I now enter into the HTML editorfor is not saved when I post the data back to the database.
I tried also adding autocomplete = "new- password", to the HTML editor for but it has not helped to remove google suggestions
What is wrong with the following?
#Html.EditorFor(model => model.renovationDetail.Notes, new {
htmlAttributes = new { #class = "form-control", Name =
Guid.NewGuid().ToString(), autocomplete = "new- password" } })
Try it.
#Html.EditorFor(model => model.renovationDetail.Notes, new {
htmlAttributes = new { #class = "form-control", Name =
Guid.NewGuid().ToString(), autocomplete = "off" } })
If it is not working then You can disable it via Javascript. Try it
$(document).ready(function() {
$("input:text,form").attr("autocomplete","off");
})
I am trying to figure out why Chrome is not rendering my drop down list correctly.
However, it renders correctly in IE
This is the line of code that is displaying this list
#Html.DropDownListFor(model => model.CountryID, new SelectList(Model.CountryList, "Value", "Text"), new { #class = "form-control", size = "18px" })
I am using the default Boostrap.css files provided by starting a new project in Visual Studio 2013. Any idea how to get this to render correctly?
You creating invalid html, and there is no guarantee how various browsers (or even versions of the same browser) will handle invalid html.
Your DropDownListFor() method is adding a size attribute which expects an integer value so size="18px" is invalid and it would need to be size="18". However the size attribute defines how many items to display in a multiple select, so since you do not want a multiple select, just remove the attribute. Your code should be
#Html.DropDownListFor(m => m.CountryID, new SelectList(Model.CountryList, "Value", "Text"), new { #class = "form-control" })
Side note: Your new SelectList(Model.CountryList, "Value", "Text") code suggest that CountryList is already IEnumerable<SelectListItem>. If that is the case, its pointless extra overhead to be creating a new SelectList from an existing SelectList so your code should be
#Html.DropDownListFor(m => m.CountryID, Model.CountryList, new { #class = "form-control" })
You need to add htmlAttributes to set your class in your razor. So change your code to :
#Html.DropDownListFor(model => model.CountryID, new SelectList(Model.CountryList, "Value", "Text"), htmlAttributes:new { #class = "form-control", size = "18px" })
I want to use the placeholder attribute in the Html.EditorFor so I did just like in the first answer: Html5 Placeholders with .NET MVC 3 Razor EditorFor extension?
But in the final part, I don't have the EditorTemplates folder so I created it and when I tried to create the string.cshtml view I couldn't because the name "string" is reserved so I chose stringg.cshtml instead and it didn't work! Do I have to change the name elsewhere in my program? I did exactly like the answer...
Thank you!
Upgrade to MVC 5.1 and you can use HTML attributes in EditorFor:
#Html.EditorFor(m => m.variable, new { htmlAttributes = new { placeholder = "Your Placeholder Text" } })
http://www.asp.net/mvc/overview/releases/mvc51-release-notes
#Html.EditorFor(model => model.members_ssn, new { htmlAttributes = new { #class = "form-control", placeholder = "Your Example Here" } })
This works for MVC 5.
In my case i was looking to set the placeholder from the model metadata, like this:
#Html.EditorFor(model => model.name, new { htmlAttributes = new { #class = "form-control", placeholder = Html.DisplayNameFor(x => x.name) } })
When using TextBoxFor or TextAreaFor rather than EditorFor, use only the inner key-value pair from #Medo's answer, since the method directly expects an htmlAttributes object:
#Html.TextBoxFor(m => m.variable, new { placeholder = "Your Placeholder Text" })
(I realize this is tangential to the original question, but having this here would have helped me when I landed on this page earlier, looking for an answer to how to add placeholder text to an Html.TextAreaFor!)
Use some jquery, eg:
$("#FirstName").attr("placeholder", "Do not type name - use Search button");
I have the following razor syntax for creating a dropdown list from a list of objects.
#Html.DropDownListFor(m => m.data_connection,
new SelectList( Model.connections,
"ID", "Title",
Model.data_connection) ,
new { style = "width: 420px;" })
This works, but I'd like to add a - select a connection - style dummy entry to the top of the list. I can do this by passing a SelectList instead of my collection of objects, but I'm wondering if there's a nice easy way to do this in the view?
Doh, found the answer here
#Html.DropDownListFor(m => m.data_connection,
new SelectList( Model.connections,
"ID", "Title",
Model.data_connection) ,
" -- select a connection -- ",
new { style = "width: 420px;" })