ValidationExtensions.ValidationMessageFor<TModel, TProperty> Method (HtmlHelper<TModel>, Expression<Func<TModel, TProperty>>, String, IDictionary<String, Object>)
Returns the HTML markup for a validation-error message for each data field that is represented by the specified expression, using the specified message and HTML attributes.
Namespace: System.Web.Mvc.Html
Assembly: System.Web.Mvc (in System.Web.Mvc.dll)
public static MvcHtmlString ValidationMessageFor<TModel, TProperty>( this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression, string validationMessage, IDictionary<string, Object> htmlAttributes )
Type Parameters
- TModel
The type of the model.
- TProperty
The type of the property.
Parameters
- htmlHelper
- Type: System.Web.Mvc.HtmlHelper<TModel>
The HTML helper instance that this method extends.
- expression
- Type: System.Linq.Expressions.Expression<Func<TModel, TProperty>>
An expression that identifies the object that contains the properties to render.
- validationMessage
- Type: System.String
The message to display if the specified field contains an error.
- htmlAttributes
- Type: System.Collections.Generic.IDictionary<String, Object>
An object that contains the HTML attributes for the element.
Return Value
Type: System.Web.Mvc.MvcHtmlStringIf the property or object is valid, an empty string; otherwise, a span element that contains an error message.
Usage Note
In Visual Basic and C#, you can call this method as an instance method on any object of type HtmlHelper<TModel>. When you use instance method syntax to call this method, omit the first parameter. For more information, see https://msdn.microsoft.com/en-us/library/bb384936(v=vs.108).aspx or https://msdn.microsoft.com/en-us/library/bb383977(v=vs.108).aspx.
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