ASP MVC: Create Expression<Func<TModel, TValue>> expression programatically

Question

I want to generate a MVC-editor with the function

System.Web.Mvc.Html.EditorExtensions.EditorFor<TModel, TValue>(
       this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression, 
       object htmlAttributes = null)

The problem is the

Expression<Func<TModel, TValue>> expression

because I have only the name of the property. I'm sure the property exist and I can get the actual instance of the Model.

How can I create the correct parameter?

Edit: To make it more clear: I have the model, I have the name of the property and want to create the Expression>.

Thanks!

Peter

Did you try Html.EditorFor(model=>model.SomeProperty); ?

Panagiotis Kanavos
– Panagiotis Kanavos

2018-06-29 15:17:09 +00:00
Commented Jun 29, 2018 at 15:17 — Panagiotis Kanavos
– Panagiotis Kanavos, Commented Jun 29, 2018 at 15:17

Johnathan Barclay · Accepted Answer · 2018-06-29 15:15:01Z

1

If you have your property name as a string, use the Editor extension method rather than EditorFor.

e.g.

@Html.Editor("YourProperty", new { htmlAttributes = new { ..

edited Jun 29, 2018 at 15:15

answered Jun 29, 2018 at 13:58

Johnathan Barclay

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Comments

PBum · Accepted Answer · 2018-07-02 07:37:40Z

1

The answer of Johnathan Barclay guides me the right way!

Instead of html.EditorFor I now use html.Editor.

Here an extraction from the code of the generator-class:

 public static MvcHtmlString GenerateStepTwo(this HtmlHelper<InputModell> html, InputModell modell)
    {
     ...
     foreach (var actField in fieldsSorted)
        {
        ...
        editor = html.Editor(fieldname, new { htmlAttributes = new { @class = "form-control", style = "max-width:200px;min-width:100px" } });

        all.AppendLine(AddOpenImageFunc(editor, fieldname));
...
}
return all;

Thanks! Peter

answered Jul 2, 2018 at 7:37

PBum

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