Tryupdatemodel mvc2 what is it

You can apply the new HiddenInputAttribute attribute to a model property to indicate whether a hidden input element should be rendered when displaying the model in an editor template. The attribute's DisplayValue property lets you specify whether the value is displayed in editor and display modes. The default value for DisplayValue is true. Instead of always displaying all validation errors, the Html. ValidationSummary helper method has a new option to display only model-level errors.

This enables model-level errors to be displayed in the validation summary and field-specific errors to be displayed next to each field. A new property is available to T4 files from the ASP. NET Framework that is used by the application.

This enables T4 templates to generate code and markup that is specific to a version of the. NET Framework. In Visual Studio , the value is always. NET 3. In Visual Studio , the value is either. NET 4. For model objects that use IDataErrorInfo to perform validation, every property is validated, regardless of whether a new value was set.

In ASP. The scripts are available as a separate unsupported download on the ASP. NET WebStack. Due to changes in the rendering behavior of MVC view engines, the Html.

Substitute helper method does not work and has been removed. This change affects only applications that include custom value providers or custom model binders. Examples of properties and methods that are affected by this change include the following:.

The Site. NET MVC project templates has been updated to include new styles used by the validation functionality and by the templated helpers. If you use ASP. If necessary, you can override this behavior by setting the new JsonRequestBehavior property of JsonResult.

The new property encapsulates both the Model and the ModelType properties. Although the Model and ModelType properties are obsolete, for backward compatibility the property getters still work; they delegate to the ModelMetadata property to retrieve the value.

In place of this property, the request context instance is passed to the protected virtual GetControllerInstance and GetControllerType methods. TextBox the UpdateModel dinner call works as expected and the new values are saved. When the new MVC2 helper style is used Http. TextBoxFor the UpdateModel dinner call does not update the values.

Yes, the current values are loaded into the edit page on load. Is there something else which I need to add to the controller code for it to work? The new helper works fine if I am just using a model and not a ViewModel pattern.

When you use the strongly typed helpers against the type, the helpers create form fields assuming that's the type you're posting to. When the types don't match up, there's a problem. However, this is very easy to fix. You can provide a prefix to UpdateModel which indicates that you weren't trying to edit the whole model, you were trying to edit a property of the model, in this case a Dinner.

Un'altra modifica Ho anche un modello utente con tutti i campi obbligatori supportati dal database e il tentativo di indicare esplicitamente quali campi vengono aggiornati provoca ancora errori di modelstate sui campi mancanti nel modulo, ma vengono compilati sull'oggetto modello dal db che viene aggiornato.

Condividi Fonte ha chiesto il 12 gennaio 11, Ask a Question. TextBox "Title", Model. GetDinner id ; if! IsHostedBy User. AddModelErrors dinner. Thank you. Please log in or register to add a comment. Please log in or register to answer this question. Related questions. When using strongly typed helpers in MVC2 the input field values aren't taken from the Model property when a post is made.

Is this default behavior?