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Controller.UpdateModel(Of TModel) Method (TModel, String, IValueProvider)

Updates the specified model instance using values from the value provider and a prefix.

Namespace:  System.Web.Mvc
Assembly:  System.Web.Mvc (in System.Web.Mvc.dll)

'Declaration
Protected Friend Sub UpdateModel(Of TModel As Class) ( _
	model As TModel, _
	prefix As String, _
	valueProvider As IValueProvider _
)
'Usage
Dim model As TModel
Dim prefix As String
Dim valueProvider As IValueProvider

Me.UpdateModel(model, prefix, valueProvider)

Type Parameters

TModel

The type of the model object.

Parameters

model
Type: TModel
The model instance to update.
prefix
Type: System.String
The prefix to use when looking up values in the value provider.
valueProvider
Type: System.Web.Mvc.IValueProvider
A dictionary of values that is used to update the model.

You do not have to explicitly specify the generic parameter TModel. Instead, you can let the C# or Visual Basic type inference engine determine the generic parameter TModel by omitting it.

The [Overload:System.Web.Mvc.Controller.TryUpdateModel``1] method is like the [Overload:System.Web.Mvc.Controller.UpdateModel``1] method except that the [Overload:System.Web.Mvc.Controller.TryUpdateModel``1] method does not throw an InvalidOperationException exception if the updated model state is not valid.

For more information model validation, see the entry Input Validation vs. Model Validation in ASP.NET MVC on Brad Wilson's blog.

Security noteSecurity Note:

Use one of the [Overload:System.Web.Mvc.Controller.TryUpdateModel``1] methods that takes either a list of properties to include (a whitelist) or a list of properties to exclude (a blacklist). If no explicit whitelist or blacklist is passed, the [Overload:System.Web.Mvc.Controller.TryUpdateModel``1] method tries to update every public property in the model for which there is a corresponding value in the request. A malicious user could exploit this in order to update properties that you do not intend to provide access to.

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