textarea with asp-for not filled

[markusvt]

I inserted a Textarea and bound it to my model like this:
<textarea rows="3" class="form-control" asp-for="@Model.Description"></textarea>

When I fill the Textarea and save it, the entered data is correctly saved in my Database. But if I open the Form afterwards, the textarea is not filled at all (all other input elements have the correct values)

I played around a bit and found out that
<textarea rows="3" class="form-control" asp-for="@Model.Description">@Model.Description</textarea>
fills it correctly. Maybe there is a bug in the textarea TagHelper?

[dougbu]

Your workaround definitely should not be required. What is the type of Model.Description? Is the element's content correctly populated if you switch to

<textarea rows="3" class="form-control" asp-for="Description"></textarea>

Since we haven't seen this, I'd appreciate a chance to look at your repro project. Could you upload something to a GitHub repo?

[markusvt]

The following is a part of my Model:

public class Basicpart_Value : IEntity
{
        public long Id { get; set; }

        [Required]
        public string Name { get; set; }
        public string Description { get; set; } = "";
     ...
}

I know there is an empty initial value for the Description, but the model was correctly loaded from the database.

Edit: I just did some more research and decorated the Description with
[DataType(DataType.MultilineText)]
Now the textarea is correctly filled.

[dougbu]

@markusvt what you're describing is quite odd because [DataType(DataType.MultilineText)] should only impact the @Html.Editor[For[Model]](...) HTML helpers. Further, only the @Html.Display[For[Model]](...) and @Html.Editor[For[Model]](...) HTML helpers and the <input> tag helper do anything related to DataTypeAttribute.

Could you please post your .cshtml file (the portion that deals with the Description property) and any generated HTML for that property?

[Eilon]

@dougbu can you try to repro this with various scenarios?

[dougbu]

@dougbu can you try to repro this with various scenarios?

Sure though I'd definitely appreciate @markusvt's specific repro.

[markusvt]

hey, unfortunately i cannot upload the whole repository, but maybe I can describe it..

1. there are 2 projects in my solution: "Database" and "Intranet"
2. in the "Database" project are the models. In this specific case, there is a model class called "Basicpart_Value" that looks like that:

[Table("Caravan_Basicpart_Value")]
public class Basicpart_Value : IEntity
    {
        public long Id { get; set; }

        [DataType(DataType.MultilineText)]
        public string Description { get; set; } = "";
   }

3: in the "Intranet" project, there are some Areas, espacially the "Caravan" Area with a View "ValueForm"
that Form looks in general like that:

<div id="@ViewBag.guid" class="UserForm">
    <form asp-route-id="@Model.Id" asp-route-area="Caravan" asp-controller="Basicpart" asp-action="SaveValue" method="post" class="form-horizontal" role="form">
        <div asp-validation-summary="ValidationSummary.All" class="failureNotification alert alert-danger"></div>

        <input type="hidden" asp-for="@Model.Basicpart_TypeId" />

        <Tabs>
            <Tab title="Allgemein">
                <div class="form-horizontal">
                    <div class="form-group">
                        <label class="col-sm-2 control-label" asp-for="@Model.Name"></label>
                        <div class="col-sm-10">
                            <input autofocus class="form-control" asp-for="@Model.Name" />
                        </div>
                    </div>
                    <div class="form-group">
                        <label class="col-sm-2 control-label" asp-for="@Model.Price"></label>
                        <div class="col-sm-10">
                            <input class="form-control" asp-for="@Model.Price" />
                        </div>
                    </div>
                    <div class="form-group">
                        <label class="col-sm-2 control-label" asp-for="@Model.Description"></label>
                        <div class="col-sm-10">
                            <textarea rows="3" class="form-control" asp-for="@Model.Description"></textarea>
                       </div>
                  </div>
                </div>
            </Tab>
        </Tabs>

        <button type="button" class="btn btn-default" onclick="closeSite()">Close</button>
        <button type="submit" class="btn btn-primary">Save</button>
    </form>
</div>

Maybe I should mention: the 'Tab' and 'Tabs' Tags are TagHelper that generate some HTML for bootstrap Tabs. Maybe there is a Problem with that nesting?

[dougbu]

@markusvt what is the @model directive in your view? It can't be @model Basicpart_Value because that type doesn't contain Name or Price properties, at least that you've shown. If not Basicpart_Value, please provide the exact definition of the Description property in the actual model type.

[dougbu]

@markusvt I remain unable to reproduce this issue with the information provided so far. Any other or corrected information you can provide? Or any smaller project where you've seen this issue?

[markusvt]

I did post just a fraction of the Basicpart_Value class. If it is possible i can put the whole project in a ZIP file and send it to you?

[dougbu]

@markusvt that's fine. Please send to dougbu at microsoft dot com.

[dougbu]

Had a good exchange w/ @markusvt. We eventually determined the <textarea rows="3" class="form-control" asp-for="@Model.Description"></textarea> in the first comment was actually <textarea rows="3" class="form-control" asp-for="@Model.Description"/>. So the <textarea> tag helper is acting as designed and this issue is very similar to #4058.

/cc @DamianEdwards and @barrytang, we have had a few issues filed around self-closed but non-empty HTML elements. Anything we can do better to show .cshtml authors what they're writing is invalid?

[barrytang]

@dougbu, I believe you have a tooling issue opened for @ToddGrun already. If not, can you open one? Thanks!

[dougbu]

Couldn't find an existing Tooling issue; filed aspnet/Tooling#398.