MVC :: Edit Validation In 2 - Error "No Parameter Less Constructor Defined For This Object"
Jan 10, 2010
i am taking data from two tables so i created one class and i constructed with two tables like this..
[Code]....
my edit post method is:
[Code]....
if i put PublisherViewModel in post function edit (ByVal aintEntityId As Integer, ByVal model As PublisherViewModel) As ActionResult. i am getting this error when post edit function called. No parameterless constructor defined for this object.
I'm very new to Visual Studio and I am getting this error when trying to update an Oracle table from Gridview using a tableadapter datasource. I've followed the instructions in my text very closely but am at a loss as to why this error is occurring.
Details: System.MissingMethodException: No parameterless constructor defined for this object.
Source Error:
[Code]....
Stack Trace:
[Code]....
this is the stack trace error I am getting. At this point, I'm a little clueless how to resolve it.
I receive the error "No parameterless constructor defined for this object", I have read some post on this forum about this error, but i cannot get it to work.
First I incorrectly had my node defined in /shared/web.config instead of the web.config in the root of the WebUI project. I also had not correctly defined my connection string within web.config. I have pasted the proper web.config sections below:
I've set up a strongly-typed View and a controller method to save the object represented in that View. The object in question is from a class that uses named parameters with default values. This is not a database object, but rather is the intermediate object that is used for the display and user input. It gets translated into a database object in the service class. Anyway, when I attempt to save the object, I get the following error:
System.MissingMethodException: No parameterless constructor defined for this object.
This is kind of aggravating. I can add a parameterless constructor to the class, and then everything works just fine. I just don't understand why it is necessary. I'm new to named parameters with default values, but the reading and such that I've done has described that method calls with default values do not have to have a 'no-parameter' implementation. You can just call the method with any or none of the parameters specified and everything works as expected. If there is a 'no-parameter' implementation and no params are passed, then that one is used, since it is more specific than the one with default values. Is the behavior somehow different when this is used in the constructor of a class? Why would I have to include a parameterless constructor when I have all the values accounted for? Is the runtime creating an object on the fly as the save method executes, which requires this? The method is like this:
[Code]....
I'm wondering if the object is instantiated by the runtime in order to populate the method parameter, and then assigned values from the form collection. I suppose that would make sense, but I do not understand why this causes an exception. For what reason would a parameterless constructor be required?
I have no idea why my form submit is not passing the model back to the Controller action
Here is the View:
[Code]....
Heres the Controller:
[Code]....
Here is my Model:
[Code]....
By default Index, renders with an empty results set, on button press i want it to go to the "StartSearch" Action, and rerender the index with possibly non-null results set.
Does anyone have any good examples of how to make Unity 1.2 or 2.0 work with ASP.NET WebForms?
I thought I had this figured out, but evidently I'm missing something. Now I'm getting the error; "No parameterless constructor defined for this object". I remember getting this error a couple years ago, I and just don't remember what I did.
Obviously Unity isn't working as it should because somewhere along the way I've forgotten something.
I have impelemented my own mvc pattern to my website , when I add desired type for my ObjectDataSource pointing to the controller class although GridView refreshes schema in designer just fine I get an error in runtime saying : "No parameterless constructor defined for this object." which is self explaining but I wonder why does it happening because I've used this pattern once and didn't have that issue , here is the bit of code that is causing this issue , what to do to keep my mvc and make it work :
I have a usercontrol which implements iwebpart and this is loaded into a webpart by adding it to the webpartmanager on the page. But i'm getting the error message "No parameterless constructor defined for this object." and i cannot find out what i'm doing wrong. The control is loaded into the webpart by:
I have the following constrcutors within a Model and I want to click the create button on a previous view and pass the projectID in and call the second Constructor so I have the projectID on this view. Do I need to change the routing in someway to call the constructor with the parameter? -
I'm using Microsoft Unity. I have an interface ICustomerService and its implementation CustomerService. I can register them for the Unity container using the following code:
If CustomerService has a certain parameter in its constructor (e.g. ISomeService1), I use the following code (I need to specify SomeService1):
container.RegisterType<ICustomerService, CustomerService>(new TransientLifetimeManager(), new InjectionConstructor(new SomeService1()));
No problems here. The problem appears when CustomerService class has two parameters (not one param as in the previous example) in its constructor (e.g. ISomeService1 and ISomeService2). It works fine when I'm using the following code: container.RegisterType(new TransientLifetimeManager(), new InjectionConstructor(new SomeService1(), new SomeService2()));The problem is that I do not want specify SomeService2() for the second parameter. I want to specify only first parameter - SomeService1(). But I get the error that I need to specify none or both of parameters. How can I specify only first parameter of constructor?
when we declared as static then we will not create the object to call the static method. then my doubt is how is call the static constructor after creating the object?can you explain cleary?
Lastly, my validation in my controller looks like this:
[Code]....
The validation works for both First and Last in that the Validation Message is properly displayed for the appropriate error. However, the input-validation-error class is not being set on the textbox.
How do I ensure that the input-validation-error class gets set on the textbox when the textbox is tied to a field in a nested class of the Model?
im creating site with usercontrols. I have repeater, inside it is another repeater with usercontrol. My problem is passing BindedValue to usercontrol.Bindings works fine and binds the value i need but it cannot pass the value to usercontrol. When i type it manually it works, when i bind it, it passes null (!).I've tried get,set, functions (ondatabound, onload, oninit), accessing control from code with no luck. Ive read and tried to do all the google solutions but with no luck. (even with creating usercontrol inheritance)
I am migrating my application to MVC3 and getting this error message Validation parameter names in unobtrusive client validation rules must start with a lowercase letter and consist of only lowercase letters or digits.How can I ovoid it without going and modifying all my ViewModels
I've created a web service , which can a method to set the user credential using Microsoft.Web.Services3.WebServicesClientProtocol. The sample code is :
<WebMethod()> _ Public Sub ClientCredential1(Of TSecurityToken As SecurityToken)_ (ByVal UserCred As Microsoft.Web.Services3.Security.Tokens.UsernameToken)
[code]....
When I run the web service it gives this error: "Microsoft.Web.Services3.Security.Tokens.UsernameToken cannot be serialized because it does not have a parameterless constructor."
I am using a telerik radgrid so there are around 5 columns each column edittemplate contains a control along with a required field validator and also a property called AllowMultiRowEdit is set to true so i am able to multiple rows in edit mode.
If any of the values are cleared the for multiple rows I want only those to be validated on update of that particular row.
So i implemented the Grids item data bound event find each and every validator along with the update button and set a unique validation group.
The above implementation most times but fails at some time. Is there any other way of going about this ?
am having a class which contains user defined data type property. I have created an instance of that class. When I bind that object of that class to DetailsView it is showing all properties except user defined data type property. Here is the sample code.
public class Customer public string CustomerName { get; set; } public int Age { get; set; } public Address CustomerAddress { get; set; } } Address class looks like public class Address { [code]...
So I've got a partial in my MVC project that creates a JSON array. I want to move this chuck of code from the top of the html page body to the bottom with the rest of the JS for speed reasons. That is to say I want to store the JSON created as a string in C# and access it on the Site.Master.
When I get an Object Ref error, it can sometimes be a real pain to find out which variable is causing the error (when you can't debug). Is there a way for this error to throw the classname that isn't assigned?
