Add Error Message To Validationsummary

April 7, 2010 1:25 pm | Error Message

ASP.NET MVC Hosting:: ASP.NET MVC application validation

Not only support server-side MVC validation, client-side validation is a possibility too. Here is a sample form that allows you to configure using client-side validation. These functions are available on the client side From File MicrosoftMvcValidation.js. Take a look at the example form with validation below.

<Html.EnableClientValidation% ();%>

<% Html.BeginForm ();%>

<% = Html.ValidationSummary ("The following errors occurred :")%>

<fieldset>
> Form <legend> values </ legend>

<div>
First: <% = Html.TextBoxFor (I => i.FirstName%>)
> <% = Html.ValidationMessageFor (i => i.FirstName, "*")%
</ Div>
<div>
Last modified: <% = Html.TextBoxFor (i => i.LastName%>)
i.LastName <% = Html.ValidationMessageFor (i => "*")%>
</ Div>
<div>
Email: <% = Html.TextBoxFor (i => i.Email)%>
i.Email <% = Html.ValidationMessageFor (i =>, "*")%>
</ Div>

<Input type = "submit" value = "Save" />
</ Fieldset>

<Html.EndForm% ();%>

Client-side validation begins by a method call to enable client-side validation. Behind the scenes, allowing some of the integrated features and guarantees certain requirements in the user interface to occur (for example, it ensures that each form has a unique ID). If we compare this example with my validation server-side blog, you can see the shape is the same, all that is different is the call to this new client-side method. Adding This method adds a new client-side code that implements the elements for validation. This code resembles the following:

if (! window.mvcClientValidationMetadata) (Window.mvcClientValidationMetadata = [];)
window.mvcClientValidationMetadata.push (("fields ":[{" FieldName": "FirstName", "ReplaceValidationMessageContents": false, "ValidationMessageId": "FirstName_validationMessage", "ValidationRule ":[{" ErrorMessage ":" First name required. "" ValidationParameters ":{}," ValidationType ":" FieldName "}]},{" necessary ":" Name "," ReplaceValidationMessageContents ": false," ValidationMessageId ":" LastName_validationMessage "" ValidationRule ": [(" ErrorMessage ":" Last name required. "" ValidationParameters ":{}," ValidationType "" FieldName "}]},{" necessary ":" Email "," ReplaceValidationMessageContents ": false," ValidationMessageId "" Email_validationMessage "," ValidationRule ": [(" ErrorMessage: "E-mail required." " ValidationParameters ":{}," ValidationType ":" necessary "}]}]," Formidable ":" form0 "" ReplaceValidationSummary ": true," ValidationSummaryId ":" ValidationSummary "));

The client side components contains Table of validators to apply to each form element. It describes the properties of the object model (which is equivalent to the ID control), mapping of those validation rules to validate against. For example, you see a lot of validators needed, which refers to implementation of each client-side server side components. It also contains the error message to display to the user when validation fails.

The action method to obtain and display data to the screen looks like our server-side eg validation too. Check the example below:

[HttpGet]
ActionResult public AjaxIndex ()
(
See return (new ValidationTestClass (Firstname = "Bob", LastName = "Anderson", Email = "boba@test.com"));
)

] HttpPost [
ActionResult public AjaxIndex (ValidationTestClass val)
(
if (! ModelState.IsValid)
See return ();

return RedirectToAction ("Index", "Home");
)

Firstly, the view that the positions of the taillights side validation customer first. If it detects an error, the field is indicated by a message generated on the client side. If successful, the form posts and the process of returning the equivalent server-side validator, and if the fire control, ownership ModelState.IsValid evaluate to true.

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