C# - How To Implement Validations In Setter Of Properties
Jun 8, 2010
I want to implement validations in setter of properties.
how I will do validations before setting value. but not getting what to do if passed value is not correct. Just not setting is not a acceptable solution as I want to return an appropriate message to user (in a label in web form). My example code is:
[code]....
A thought was to use return but it is not allowed.
Throwing error looks not good as generally we avoid thorwing custom errors.
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Similar Messages:
Aug 24, 2010
I have been using properties and have idea that using properties with private fields we can implement validations and buisness rules in them.
But I am just thinking asp.net client side validation controls provide good strength and they provide good user experience as well. They can be used for any type of validation (using regular expression) on client side and their re-use is possible on server side. When validation controls are a must and they are powerful; is making properties not just wastage of time ?
Is there still some use of properties ?
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Jan 18, 2011
1. Is it always required to use javascript to do client side validation.
2. If we dont want to use the script then can I write the code in c# for validating a control like text box using the events.
3. If I write the code in c#, does it always requires a postback?
how can I implement validations for controls in c#. I am not familiar with javascript, so is it good to write the validations in c#
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May 7, 2015
I want to use Bootstrap validation in child page of a Master Page in asp.net. I need a example of it.
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May 27, 2010
we use ASP.NET with C# and based on open source projects/articles I passed through, I found many properties were including a logic but when I did so the team-leader told me it's not good at all to place logic inside properties but to call the logic through methods...
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Jul 25, 2010
Here's mt entity:
Csharp Code:
using System;using System.Collections.Generic;using System.Linq;namespace Venue.Domain{ using Venue.Infrastructure.Domain; public class Forum : Entity { private IList<Forum> children = new List<Forum>(); private IList<Moderator> moderators = new
[code]....
Here's my class map:
Csharp Code:
using FluentNHibernate.Mapping;namespace Venue.Persistence.Mapping{ using Venue.Domain; public class ForumMap : ClassMap<Forum> { public ForumMap() { Id(x => x.Id); Map(x => x.Sequence); Map(x => x.Title);
[code]....
And here's my convention:
Csharp Code:
using FluentNHibernate.Conventions;using FluentNHibernate.Conventions.Instances;namespace Venue.Persistence.Mapping.Conventions{ public class ReferenceConvention : IReferenceConvention { public void Apply(IManyToOneInstance instance) { instance.Column(instance.Property.Name + "Id"); } }}
I get the following message:Could not find a setter for property Children ...
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Apr 29, 2010
I'm currently working on. I don't have a compsci degree so I don't know what to call this.I have a method called TryToGetSetValue(Direction direction, object value, object valueOnFail)
public enum Direction
{
ModelToForm,
FormToModel
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Nov 3, 2010
I have a new VS2010 .NET 4.0 Web project and the Properties Folder has gone wierd on me. It has lost teh "Open" under the right click. There is no way to get a Settings file created now.
I am unable to get to the Settings grid and no Settings file is created. I tried the help and it has the normal trip of select Properties, Open (right click), Settings Tab, etc. etc.
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Jun 4, 2010
I have 3 items in Drop downlist (DDStatus) In-progress ,Approved,Rejected and a button (Final E-mail) on form. when i select Approved in dropdown FinalEmail button should be enabled. how can i do that in which even i have written.
<asp:DropDownList ID="DDStatus" runat="server" Height="22px" style="margin-left: 2px" Width="94px">
<asp:ListItem Text="-Select-" Value="" />
<asp:ListItem>Approved</asp:ListItem>
<asp:ListItem>InProgress</asp:ListItem>
<asp:ListItem>Rejected</asp:ListItem>
</asp:DropDownList>
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Mar 3, 2010
I am relatively new to ASP.NET. I am just wondering if there is way to read values from properties file (similar to rading a properties file from JSP or java).
For example if a property file has something similar to this:
[Code]....
I would like to read all the values for username_list (comma seperated) and also the value of is_valid.
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Mar 21, 2011
<%= Html.ValidationSummary("Account creation was unsuccessful. correct the errors and try again.") %>
</div>
<% using (Html.BeginForm("Register", "Account" , FormMethod.Post))
{ %>
<div>
<fieldset>
<legend>Account Information</legend>
<p>
<label for="username">User Name:</label>
<%= Html.TextBox("username") %>
<%= Html.ValidationMessage("username") %>
</p>
<p>
<label for="FirstName">First Name</label>
<%= Html.TextBox("firstName") %>
<%= Html.ValidationMessage("firstName") %>
</p>
<p>
<label for="LastName">Last Name</label>
<%= Html.TextBox("lastName") %>
<%= Html.ValidationMessage("lastName") %>
</p>
<p>
<label for="email">Email:</label>
<%= Html.TextBox("email") %>
<%= Html.ValidationMessage("email") %>
</p>
<p>
<label for="password">Password:</label>
<%= Html.Password("password") %>
<%= Html.ValidationMessage("password") %>
</p>
<p>
<label for="confirmPassword">Confirm password:</label>
<%= Html.Password("confirmPassword") %>
<%= Html.ValidationMessage("confirmPassword") %>
</p>
<p>
<label for="Role">Role:</label>
<%= Html.DropDownList("Role",((SelectList)ViewData["Roles"]),"--Select One---") %>
</p>
<p>
[Code....]
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Nov 4, 2010
I have a grid view which i am using to unlock the user. I have a checkbox ,locked user details and a button in that. If i click on the button in the button click event it is checking whether checkbox is checked or not and if it is checked then the user will get unlocked. And what i need here is if check box is not checked i want to show error message.
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Oct 8, 2010
I am new to Asp.net MVC. How to give validations for my forms.
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Mar 1, 2011
i cant seem to selectively disable serverside validation using annotations. Data annotations and unobtrusive validation is an awesome feature and has worked out great for us thus far but trying to localize it has been fruitless.
Basicly i have a property in a model object like this (it wraps a DTO)
[Code...]
i can change the output text for things like data range, required, string length etc. but simple stuff like "this field has to be a number" seems hidden away.
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Mar 21, 2011
When the submit button is pressed, the form just posts. No validations occur. What am I missing???
Web Config:
<appSettings>
<add key="ClientValidationEnabled" value="true" /> [code]...
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Sep 30, 2010
In web application ,when we follow mvc design pattern ,In which part (M,V or C) does the validations take place??..if we have client side validations using JavaScript thn where they take place?.In .net web applications ,can anyone just clearly mention the differnce between model and controller with some example.
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Feb 3, 2010
In my form i am having 5 text boxes where onlyone text box will be active(visible=true) and i need validation for it.....Similarly i applied the same validation for all other hidden textboxes which will be activated by another add button click.So here am having only one button to submit the data basing on the user selection of textboxes.So while submitting data in single in textboxes validation is firing in another textboxes also and I dont want it...i want the validation to be fired for the textbox which i activated it.
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Apr 16, 2010
I have a form where I am trying to validate few text boxes using javascript. It is not working as it is inteded to and I am unable to understand the reason.can someboady
[Code]....
[code]...
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Jun 30, 2010
I am facing problem related asp.net validations controls. validations are working at only one machine. During troubleshooting I have check configuration settings like web.config ,machine.config file, client side source as well as server side source code but all are the same.
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Feb 10, 2010
I've an application where in i'm using same user control for different functionalities.The user control has 2 textboxes.i need to validate them on button control in respective parent pages my application looks like this:Parent page with button and a user control(which has 2 textboxes).I need to validate the textboxes in button event of parent page
[Code]...
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Mar 31, 2010
Brief overview of my problem......I have certain text boxes(say, txtbox2) in a page that have to be filled only if certain other text boxes(say, txtbox1) are filled. For this, I have disabled the requiredfield validators for txtbox2 in the asp.net code and then wrote a javascript to enable these text boxes on the required conditions. All this works well. In my submit button I have written this,
OnClientClick="if(Page_ClientValidate()) return Check();"
my javascript
Function Check()
{
var Valtxtbox1 = document.getElementById("<%=txtbox1.ClientID%>").value;
var Valtxtbox2 = document.getElementById("<%=txtbox2.ClientID%>").value;
if((Valtxtbox1 != '') && (Valtxtbox2 == ''))
{
alert('Please enter in txtbox2');
ValidatorEnable(document.getElementById('required_txtbox2'), true);
return false;
}
if ((Valtxtbox2 != '') && (Valtxtbox1 == ''))
{
if(parseInt(Valtxtbox2))
{
alert('Please enter in txtbox1');
ValidatorEnable(document.getElementById('required_txtbox1'), true);
}
else
{
document.getElementById("<%=txtbox1.ClientID%>").value = ........................
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Apr 21, 2010
When I am using one of the default validation attributes, like [Requeried], and try to submit the form that is in an invalid state some 'magical' happens and the submit is canceled. I can even click 100x that not a single server request is made.On the other hand, I can't accomplish this behavior when I am using a custom validation attribute. Although my form was in an invalid state, a request is sent to the server anyway.I took a look at the "MicrosoftAjax.js" and "MicrosoftMvcValidation.js" but I am totally noob when it comes to Javascript.How can I accomplish the same behavior for both custom and default validations
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Feb 25, 2010
In forms I need to do custo validations. Like if use select radio button that he is residing on current address for more than 3 than previous residance fields are optional but if he select (radio button) that he is residing on current address for less than 3 years than previous address fields should be requried. Requirment is to do these on client side.
how this can be done. Secondly can there be some way we just disable a validation group and all validations in this group may be turned to disabl ?
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Jun 2, 2010
I have a form that uses ASP.NET validations. I am using some inline C# in the aspx to show/hide certain controls depending on a user's role. I would use the Visible property, but there are so many of them, I just decided to do inline C# to show and hide (I know, not best practice, but bear with me for a second). I am having an issue where Page.IsValid is always set to False when I submit my form (when certain fields are being hidden). Will the validations still fire off even if the controls are not even rendered on the pag? Also, if this is not the case, is there an effective way of breaking down Page.IsValid to find out what is setting it to False?
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Dec 30, 2010
While develop some asp site i have problem with multiple validations on one field. I have input box and 3 validations for it.
- Required Field
- Compare Validation
- Regular Expression
how to set validations priority. Ex. If Required Field catch error, then Compare Validation and Regular Expression validation messages to be hidden. If Compare validation catch error (and Required field is ok- entered something) then validation message for Regular Expression to be hidden... etc etc...
[Code]....
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