C# - Extend The Requirefieldvalidator To Take A New Property And Validate Regularexpressions?
Mar 16, 2011
I'm trying to extend the requirefieldvalidator to take a new property and validate regularexpressions also. I know I can use the RegularExpression control but then i need 2 controls so i want to eliminate it so i only have to use two controls. There are also other features i want to make which include me extending it. My problem is i don't know what to override - i tried the Validate() but i get "cannot override inherited member 'System.Web.UI.WebControls.BaseValidator.Validate()' because it is not marked virtual, abstract, or override" and i understand the EvaluateIsValid() is for validating the control not what is in the control.
[code].....
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Jul 30, 2010
I'm not talking about asp.net membership.
For each logged user I want to cache some properties like status or the number of friend requests, from the db.
I can create custom class which would do it but I thought it will be better to extend the existing User.Identity property. Something like this:
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Feb 18, 2010
I am creating a fairly straight forward form for collecting data about vendors. I have a requirement that says the email address is required for a certain payment method and not other payment methods. The way I currently have this implemented is using a dropdownlist for the payment method and a TextBox for the email. I have been using ValidatorCalloutExtenders on all the other input fields with great success, but this is the first case where I need to be able to turn the validator and extender behavior on and off based on a selection of the dropdownlist.
I have tried many things and have searched these forums and google until my hands and eyes got tired, but have yet to find success, hence this post. I am aware of the dispose and $create methods, and that is currently what I am trying to do, but after the create occurs, while the behavior has been created, it doesn't seem like it has been created completely or something. To implement this, I am using a function tied to the onChange Event Handler of the drop down list. The function essentially checks the dropdownlist selection value and if it is NOT "ACH", then it finds the behavior attached to the requiredfieldvalidator attached to the email textbox and calls the dispose method on that behavior, if the selection value IS "ACH" then the method calls
$create(AjaxControlToolkit.ValidatorCalloutBehavior, { "closeImageUrl": "/VendorMaintenanceForm/WebResource.axd?d=IJFIM0l1l2KBLbEjcc5eS12jNidTRT60rU5Tz_Vg2CIJnYpw0GWOKDcVthhDzk9qkoREy7KswErAqM-kEQdJ5c18thtoit9YPZB3oq-EKdE1&t=633129167627987742", "highlightCssClass":
"HighLight", "id": 'emVal', "warningIconImageUrl": "/VendorMaintenanceForm/WebResource.axd?d=IJFIM0l1l2KBLbEjcc5eS12jNidTRT60rU5Tz_Vg2CIJnYpw0GWOKDcVthhDzk9qpoLKUlLQVCOCBk1mUhtC-YfwF57Tw0d676WGnnWiYI41&t=633129167627987742", "width": "300px" }, null, null,
$get("ctl00_MainContent_RequiredFieldValidator5"));
The reason I say this, is because once the page loads, the default value is to have the validator disabled, then if I select the payment method that enables the validator, it seems to work fine, but then if I cycle through the payment method choices again, I end up with a null pointer exception to the TextBox element when the validator is trying to apply the highlightCssClass on form validation. So, to summarize, it seems like when the page loads, things get built correctly, but then when I start doing the dispose and $create, things are recreated correctly so that when the submit button click causes validation, the validator throws a null pointer exception.
I know it can be hard to debug this sort of thing using words, but I was just wondering if I am going about this the right way or if there is an easier way to conditionally enable/disable a requiredfieldvalidator and validatorcalloutextender.
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Jan 22, 2011
In my model, it seems that Validate() is only called AFTER both properties pass validation.
public class MyModel : IValidatableObject
{
[Required]
public string Name { get; set;}
[Required]
public string Nicknames {get; set;}
public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
{
if(Nicknames != null && Nicknames.Split(Environment.NewLine.ToCharArray()).Count() < 2)
return yield result new ValidationResult("Enter at least two nicknames, new [] { "Nicknames" });
}
}
When a user enters a single line of text in the Nicknames text area but leaves the Name text box empty, only the Required error message for the Name property is displayed. The error message that should be displayed from the Validate() function never shows up.
Only after entering a name in the Name text box and some text in the Nicknames text is the Validate() function called.
Is this how it's supposed to work? It seems odd that a user is shown an error message on a subsequent page when the error is being caused on the current page.
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May 17, 2010
Can you validate just a single property with the Fluent Validation Library, and if so how? I thought this discussion thread from January of 2009 showed me how to do it via the following syntax:
validator.Validate(new Person(), x => x.Surname);
Unfortunately it doesn't appear this works in the current version of the library. One other thing that led me to believe that validating a single property might be possible is the following quote from Jeremy Skinners' blog post:
"Finally, I added the ability to be able to execute some of FluentValidation's Property Validators without needing to validate the entire object. This means it is now possible to stop the default "A value was required" message from being added to ModelState. "
However I do not know if that necessarily means it supports just validating a single property or the fact that you can tell the validation library to stop validating after the first validation error.
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Oct 4, 2010
I am using javascript to validate user input on my aspx page. I am easily able to validate textboxes and dropdown list for differenet scenarios.
Now, on one of my dropdown lists (for country), I need to check if it is an allowed country or not for a particular service. I have stored the valid country list in a static property. Is there a way to validate my dropdownlist selected value against that static property?
function validateService(source, args)
{
var country = document.getElementById('<%= ddDestCountry.ClientID %>');
var service = document.getElementById('<%= ddService.ClientID %>');
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var countryList = document.getElementById('<%= StaticProperties.EUCountryList %>');
if (service.value == "P")
{
// I want to do something like this
if (!countrylist.Contains(country.value))
{
args.IsValid = false;
}
else {
args.IsValid = true;
}
}
return;
}
Update(Additional Information): The static property is read-only so it cannot be tampered with from the page.
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Mar 10, 2011
I work in a web agency and thus we are plenty of websites from several customers. They're built upon a cms we made, so websites are quite identical for the 90% of code. However, remaining 10% struggles me and my team as it involves not only the presentation layer but behavioral logics too (ex: a website1 requires simply user/pass registration while website2 needs more data, facebook connector, etc. But this is a very easy example). Making ad hoc development for our customers is becoming painful as keep each version aligned is getting really hard for us What I really dream to have is an extendible website that works by itself, but in which I can override a part. This behavior should sound like "look for the specific part, if it doesn't exists get the base one". The parts could be a method, a class, a page, a control, a static file.
example:
Suppose I want website2 to have an own login component, let's so imagine that we have a situation like:
/website_base
|_ login.aspx
/website1
/website2
|_ login.aspx
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Dec 17, 2010
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Sep 16, 2010
I am trying to create an extension to extend the HtmlTextbox methods to allow our developers to add onkeydown inline javascript to auto click a button with a name they specify.
[Code]....
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Feb 24, 2010
I am obviously missing something here and it is driving me batty. I am trying to implement a custom role provider so that I can add some of my own custom code to it. I have created my CustomRoleProvider class, I have inherited the RoleProvider base class and implemented its members. I have made the required changes to my web.config so that my CustomRoleProvider is used. This is all working great.
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Now I want to add my own custom functionality.
When I add a function to my CustomRoleProvider I cannot see it or access it.
How do I add functionality to my CustomRoleProvider so that I can use it?
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I can extend the HtmlHelper class from a View page but how can I extend its functionality within a class?
[code]...
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Mar 27, 2011
Using asp.net C#. I have BulletList, and I would like to add ListItem that will render with childs.
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Feb 25, 2011
I am busy writing my own custom attribute for my action method called MyAuthorizeAttribute, I am still busy writing the code, here is my partial code:
[AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]
public class MyAuthorizeAttribute : AuthorizeAttribute
{
public new Role Roles;
public override void OnAuthorization(AuthorizationContext filterContext)
{
base.OnAuthorization(filterContext);
if (Roles != 0) // Did it this way to see what the value of Roles was
return;
// Here I am going to get a list of user roles
// I'm doing my own database calls
filterContext.Result = new HttpUnauthorizedResult();
}
}
Here is my Role enum:
public enum Role
{
Administrator = 1,
SuperAdministrator = 2
}
My action method:
[MyAuthorize(Roles = Role.Administrator|Role.SuperAdministrator)]
public ActionResult Create()
{
return View();
}
The reason why I did not use Roles = "Administrator,SuperAdministrator" was because the roles are hard-coded. I don't want to have a 100 places to change if the role name changes.
Given my method, when it gets to if (Roles != 0) then Roles total value is 3, how would I check to see if these 2 roles is in the list of user roles for a specific user?
Am I doing it correct here? If not how would I otherwise implement this? It doesn't have to be the way that I did it in.
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Mar 28, 2010
I need to write some dynamic queries for a project I'm working on. I'm finding out that a significant amount of time is being spent by my program on the Count and First methods, so I started to change to .Single, only to find out that there is no such method.
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public static object Single(this IQueryable source, string predicate, params object[] values)
{
if (source == null) throw new ArgumentNullException("source");
if (predicate == null) throw new ArgumentNullException("predicate");
LambdaExpression lambda = DynamicExpression.ParseLambda(source.ElementType, typeof(bool), predicate, values);
return source.Provider.CreateQuery(
Expression.Call(
typeof(Queryable), "Single",
new Type[] { source.ElementType },
source.Expression, Expression.Quote(lambda)));
}
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Mar 14, 2011
I'm trying to style my menu and menu items so it looks like a tabbed menu. I've seen really nice css code examples which I want to use in my master pages. Problem is, when you click @ a menu item, the active menu item should have a other css class than the other ones in order to style them. How can I do this? Is there a tabmenu available which is easy to style and detects when a menu item is clicked?
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Apr 21, 2010
In previous versions of DynamicData you could override GetFilteredColumns method from FilterRepeater to manage which columns are used to generate filters.
But now FilterRepeater is obsolete, and his successor QueryableFilterRepeater don't have such method.
There is any way to override the columns used for filtering with QueryableFilterRepeater?
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