Removing validation errros of unused fields ASP.NET MVC

We are using ORM tools to create our Model objects and we may not be using all the properties in the page, So validation is going to be thrown irrespective of the properties used in the page.

In these scenarios we can use ActionFilterAttribute. We should override the OnActionExecuting method to remove the validations for un used properties.

public class UsedFieldsOnlyValidationAttribute : ActionFilterAttribute{

public override void OnActionExecuting(ActionExecutingContext filterContext)
{
var modelState = filterContext.Controller.ViewData.ModelState;
var valueProvider = filterContext.Controller.ValueProvider;

var keysWithNoIncomingValue = modelState.Keys.Where(x => !valueProvider.ContainsPrefix(x));
foreach (var key in keysWithNoIncomingValue)
{
modelState[key].Errors.Clear();
}
}
}

Submit Link Button for ASP.NET MVC

We are using submit buttons (input type=submit) for submitting the form back to the server.

We have other buttons in the page as link button, so we had different look & feel between submit button and others.

We wanted create a submit button that looks like other link button as well as it should do the submit functionality by own.

So we decided to create a extension method.

To submit the page, i used the below code in the href.

document.forms['" + formId + "'].action = '" + href + "';
document.forms['" + formId + "'].method = 'POST';document.forms['" + formId + "'].submit();

To manually call the microsoft client side validation, i used the below code in the href.

Sys.Mvc.FormContext.getValidationForForm(document.forms['" + formId + "']).validate('submit').length

Find the extension method below

public static MvcHtmlString SubmitLinkButton(this HtmlHelper helper,
string caption,
string actionName,
string id,
string formId,
RouteValueDictionary routeValues = null,
Dictionary htmlAttributes = null)
{
return CreateLinkButton(helper, caption, actionName, id, routeValues, htmlAttributes, formId, null);
}

private static MvcHtmlString CreateLinkButton(HtmlHelper helper,
string caption,
string actionName,
string id,
RouteValueDictionary routeValues = null,
Dictionary htmlAttributes = null,
string formId = null,
string href = null)
{
string cssClass = "t-grid-action t-button t-state-default";

if (href != null)
{
href = "#";
}
else
{
formId = formId ?? "0";
//creating href string
href += "/" + helper.ViewContext.RouteData.Values["controller"].ToString();
href += "/" + actionName;
//QueryString can be found here - helper.ViewContext.Controller.ControllerContext.HttpContext.Request.QueryString
if (routeValues != null && routeValues.Count > 0)
{
href += "?";
href = routeValues.Aggregate(href, (current, routeValue) => current + (routeValue.Key + "=" + routeValue.Value + "&"));
href = href.Substring(0, href.Length - 1);
}
href = "javascript:{if (!Sys.Mvc.FormContext.getValidationForForm(document.forms['" + formId + "']).validate('submit').length) { document.forms['" + formId + "'].action = '" + href + "';document.forms['" + formId + "'].method = 'POST';document.forms['" + formId + "'].submit();}}";
}

var linkButtonBuilder = new TagBuilder("a");
linkButtonBuilder.GenerateId(id);
linkButtonBuilder.MergeAttributes(htmlAttributes);
linkButtonBuilder.AddCssClass(cssClass);
linkButtonBuilder.MergeAttribute("print_mode", "hide");
linkButtonBuilder.MergeAttribute("href", href);
linkButtonBuilder.SetInnerText(caption);

return MvcHtmlString.Create(linkButtonBuilder.ToString());
}