HtmlFieldPrefix in a partial view breaks Html helpers which take expressions as strings

Question

User1431643137 posted

Using HtmlFieldPrefix:

 @Html.Partial("_UsersPartial", Model.USERS.First(), new ViewDataDictionary { 
  TemplateInfo = new TemplateInfo { HtmlFieldPrefix = "anything" } })

or just using the Html.EditorFor

@Html.EditorFor(m => m.USERS)

which has an implicit HtmlFieldPrefix, make HtmlHelpers, such as TextBox and Editor, not able to get the value from the model (inside the PartialView/EditorTemplate), i.e. input field is empty.

Html.TextBox("propertyA")

produces an empty input even if Model.propertyA != null

TextBoxFor and EditorFor are working fine.

 

PS. I am using this property to give the necessary prefixes to my input fields when using partials to displat a nested property.

Answer 1

User-17257777 posted

Hi illusive7man,

Note you’re invoking the [`@Html.TextBox(name)` without the value parameter]

In that case, the value will be null.

One approach is to specify the value for the field.. See [TextBox(HtmlHelper, String, Object)]

Index View:

@Html.Partial("_UsersPartial", Model.USERS.First(), new ViewDataDictionary {
  TemplateInfo = new TemplateInfo { HtmlFieldPrefix = "anything" } })

_UsersPartial View:

@model Test5.Models.User
@Html.TextBox("propertyA", Model.Name)

Test Result:

By the way, you don’t have to pass two parameters by `@Html.TextBox(name, value)`. Using `@Html.TextBoxFor(model=>model.Name)` will also make it.

Best Regards,

Jiadong Meng