I try to create a asp.net mvc 2 application.
My DropDownList won't be validated!
I have a core model class called Animal with some attributes and the same for the class Genus. These classes are mapped to nHibernate.
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I am working in an ASP.NET MVC Application. I have a view model as follows:
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From UI Perspective user can enter date as mmddyyyy. And when user enters in such format 01012001, my ModelState.IsValid code piece in controller returns false. When I did a quick watch in ModelState, I see an error for the propery "SampleDate", saying "The Value 01012001 is not valid for SampleDate".
In my modelbinder, during the OnModelUpdated event I tried to format the value 01012001 to 01/01/2001 and assigned it back to SampleInterestViewModel.SampleDate thinking that ModelState.IsValid might return true without that error. But still ModelState.IsValid is false and I when I looked in to the ModelState dictionary, this particular property still has that errors in its collection.
Lastly I tried to format 01012001 and update the value 01/01/2001 directly to the Property SampleDate in the ModelState dictionary. But still ModelState.IsValid is false showing the same error for the SampleDate property. Can't figure out why ModelState.IsValid works and how and when it gets set to false.
If the User enter 01012001 in the UI, I still need to format it in the modelbinder to 01/01/2001 and make sure that ModelState.IsValid it true so that the rest of my controller code can work as expected. In the UI I am doing an AjaxSubmit to post the sampleDate value.
explain to me the difference between these two? I'm new to MVC and can't seem to find an explanation anywhere.
View 3 RepliesI want to making another dropdownlist visible=false when clicking in dropdownlist on the same detailsview?
View 4 RepliesIs it necessary to do a ModelState.IsValid check at the top of every action? It seems that it is since the default model binder could make it invalid depending on the action parameters.
View 3 RepliesThe latest MVCSaffolding package uses "if (ModelState.IsValid)" prior to saving changes. In the past I have seen TryUpdateModel... used.
Is there a best practice?
I have cause validation true on button. And I am checking the Page.IsValid in c# code. But its always returning false value?
View 2 RepliesI want to pop up a message box when page.isvalid = false. How to do that?
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Model is coming up as Invalid Scenario is I have a custom ViewModel and certain fields don't show up on the screen (like Id & some computed fields etc..) so when the data gets posted back the Model.IsValid() comes to false Q Do I have to pre init these fields when I do create
ActionResult CreateOrder(int customerID)
{
var order=new OrderViewModel();
//shall I init the fields which are not being keyed in by the user?
}
In our code, we have to give the users a list of printers to choose from. The user then chooses a printer and it is checked to verify it is valid before printing. On a windows 2003 server with IIS 6, this works fine. On a windows 2008 server with IIS 7, it fails each time impersonate is set to true.
PrinterSettings printerSetting = new PrinterSettings();
printerSetting.PrinterName = ddlPrinterName.SelectedItem.Text;
if (!printerSetting.IsValid)
{
lblMsg.Text = "Server Printer is not valid.";
}
else
{
lblMsg.Text = "Success";
}
Each time this code is run, the "Server Printer is not valid" displays, only if impersonate is set to true. If impersonate is set to false, the success message is displayed. The impersonation user has full rights to the printer. Is there a way to catch the actual reason the printer is not valid? Is there some other 2008 setting I should check? update I found that IsValid fails when the IIS7 application pools has "Enable 32-bit applications" is checked. This must be checked b/c we are using a 3rd party tool to print with, and it is a 32-bit application. It is not currently part of this test, so right now it is not causing this error.
i have a textbox1 and drop down list 1
i am filling drop downlist from Sql datasource and textbox1.text=Dropdownlist1.SelectedItem.Value.ToString()
all working fine but if i set dropdownlist1.visible = false than textbox1.text = empty string I need to hide the dropdownlist1 and in the same time i need the selecteditem of dropdownlist to be in the Textbox1.text
I am using a wizard control in which I have a next button that has causes validation = true. I also have a checkbox that when changed, in the event handler, I set causes validation = false for the next button. When that button is clicked - I get the following:
Page.IsValid cannot be called before validation has taken place. It should be queried in the event handler for a control that has CausesValidation.
Here is the code:
protected void chk_CheckChanged(object sender, EventArgs e)
{
CheckBox chk = (CheckBox)sender;
ImageButton ibtnStepNext = (ImageButton)(this.WizardSummaryTemplate.CustomNavigationTemplateContainer.FindControl("StepNextButton"));
ibtnStepNext.CausesValidation = (!chk.Checked);
}
What would be the recommended solution to disabling validation for the next button so I don't see this error?
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The following setup seems to work fine on the client side, however when I post back and check Page.IsValid, the value is false. I also looked at mevDate.IsValid and it's false. It seems that setting the CultulreName on the MaskedEditExtender is sufficient to get the MaskedEditValidator to emit the correct JavaScript, but on the server side of things it doesn't work. When I flip CultureName to "en-US" everything works as expected.
I have implemented customised registratio page by extending the membership provider using profile provider.I successfully registered the user .Now i want to validate the fields of registration page.Built-in Registration page has builtin validation messages.
Bu in my coding i am not passing model to the registration action, instead i am passing properties.So if i Use If(ModelState.IsValid) it is always gives true even i am not filling any fields .but after it throws an exception but not displaying error messages in the page.tell me what i have to do.How i am getting my validation messages.
I saw Account Models class in that for register Model built in validation conditions are there.So i am also writing like that for my properties.
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I have a dropdownlist (cboViewAlbums) which has displays album values. The first item is a select an album. I am trying to use validation which when lb_create_album linkButton is clicked throws an error if the cboViewAlbums list has the value 0 selected. Below is the code for the this and my attempt:
<asp:DropDownList ID="cboViewAlbums" runat="server"
DataSourceID="SqlDataSource1" DataTextField="album_name"
DataValueField="album_id" Width="250px" AutoPostBack="True" AppendDataBoundItems="true">
<asp:ListItem Value="0">Please select an album...</asp:ListItem>
</asp:DropDownList>
<asp:LinkButton ID="lb_create_album" runat="server">Create Album</asp:LinkButton>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:fpaConnectionString %>"
SelectCommand="SELECT [album_id], [album_name] FROM [fpa_albums] ORDER BY [album_name]">
</asp:SqlDataSource>
<br />
<asp:HyperLink CssClass="example7" ID="hLinkUploadPhotos" NavigateUrl="multiple_upload.aspx" runat="server">Upload Multiple Photos</asp:HyperLink>
<br />
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server"
ControlToValidate="cboViewAlbums" ErrorMessage="Please Select an Album"
InitialValue="Please select an album..."></asp:RequiredFieldValidator>
I am a bit baffled... I had my validation working fine till I added a validation group to it. Can someone tell me what i might be missing ? I'm at a loss... As I have another page doing the same thing and it works fine. Page.isValid always comes back as true.( I am just clicking on the button to make all the validation fire off.... )
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I have an CustomViewModel that is composed of three layers of objects.
The first one is to store and populate lists to be used in dropdowns.
The second one is to store additional propperties that I want.
And the third one is the model itself.
I create the view using View(new Layer(model))
And at the post i have ActionResult .... (Container container)
I made this architecture because i was having a lot of problems with model binder and enums...
So when i post to the form and the ModelBinder checks the validation attributes, the IsValid operation at the attribute X applied to the model class has its parameter value as null.
This behavior doesn't happen if I Just use the simple model to create and post the view.
What I have to do to get this work ?
I made a few changes to the AccountController to use it as sample here, here is the code:
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Just change the register page to inherits from RegisterModelLayer.
When I post, the value parameter at the IsValid function at the PropertiesMustMatchAttribute class is null;
As a consequence i can't validate and get an null exception maybe.
I am creating a custom 'control' which is simply made of two html inputs [type=text] but can't figure out how the validation will work on the view end.
I want to treat these 2 inner controls as asingle control so when a error is added to modelstate both of these inputs are highlighted in the view and a single validation message is shown.
I have a Dropdownlist control in my web form with names of few countries pre populated.I have also added a 'Please select..' option in the DDL .Now how to use validation control in DDL so that please select options doesnotget selected when i click submit button.Only after user selects country i want to insert the value in database.
View 3 RepliesI have the following code:
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The file is validated using FluentValidation. So if the file is valid (Is CSV and less than 400 KB) then the ModelState is valid.
The problem is that if the ModelState is valid then I need to parse the file and here some errors can occur:
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Can this be done?
I mean the ModelState was valid but sudenly it is not valid anymore.
I'd like to disable ModelState validation messages and keep my data annotation error messages.
When I update model, message "The value '' is invalid." apears in ModelState. I know that I'm trying to assign null to not nullable property, but I have my own validation and message.
I use something like this
[Required(ErrorMessage="Blahblah some error")]
I want user to see my message "Blahblah some error", but not stupid message: The value '' is invalid.
I have Dropdownlist whose value field and text field are bind at runtime. it has --select-- as first item with a value of '0' and the rest of the values are bind at runtime.
I have given validaton group for both the control and the validator as "g1" and Intialvalue=0
But still the page is posting back even if I select '--select--' option.
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I'm currently stuck with a problem with MVC2 RC and validation on a dropdownlist :
I have a page with some fields and a dropdownlist. The dropdownlist is not a mandatory field so I would like to save a null value into my property.
Unfortunately, I can't validate my page with a null selected value, because when I look into the modelstate just on the first line of my action, I've already an error telling me I must choose an item.
Is it normal working of dropdownlist validation or is it a bug ?
I have DropDownlist with Reqired field Validator control for validating initial value of DDL
Now if Checkbox is Checked then i have to disable the Validation of DropDown Selection else must validate the DropDownlist initial value.
Note: The following is just an example.
I'm pretty new to ASP.NET MVC and I'm trying to get my head around how validation of dropdown lists work. I have the following property in my ProfileViewModel class:
[DisplayName("Gender")]
public bool? Gender { get; set; }
null is meant to mean "unknown", true female and false male. In the view model constructor I
AllGenders = new List<SelectListItem>(2)
{
new SelectListItem {Text = "Unknown", Value = "null"},
new SelectListItem {Text = "Male", Value = "false"},
new SelectListItem {Text = "Female", Value = "true"}
};
First of all, it seems that I have to use strings when populating a List<SelectListItem>, which feels kinda weird. Is this really how it's done?
Secondly, when I choose "Unknown" in the list the validation fails telling me:
The value 'null' is not valid for Gender.
Why is that? When I remove the "null" option and change Gender to a simple bool, everything seems fine.
This is the ASPX:
<%= Html.DropDownList("Gender", Model.AllGenders) %>
(I can't get DropDownListFor to work correctly and it seems that many others have the same problem.)