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How to Create Custom Validation Attribute in C#

by kr.is

How to create a simple validation attribute using C#

Developing a sample project in Repository Design Pattern with the combination of Entity Frameworks (Code First), Unit of Work Testing, Web API,...

by Kelum Priyadarshane

This project developed using combination of Entity Framework 6.0 + Code First Approach + Web API 2 + Repository Pattern + ASP.NET MVC 5 + SQL Server 2012 + Unit of Work Testing + Bootstrap.

Custom MVC Validations – A Quick Walkthrough

by Web Technobrat

A quick walkthrough for implementing client and server side validations in a variety of ways in ASP.NET MVC projects.

Validations using C# "DataAnnotation"

by Shivprasad koirala

In this short article, we will discuss how C# DataAnnotation library helps us to do validations.

Latest Articles

How to Create Custom Validation Attribute in C#

by kr.is

How to create a simple validation attribute using C#

Developing a sample project in Repository Design Pattern with the combination of Entity Frameworks (Code First), Unit of Work Testing, Web API,...

by Kelum Priyadarshane

This project developed using combination of Entity Framework 6.0 + Code First Approach + Web API 2 + Repository Pattern + ASP.NET MVC 5 + SQL Server 2012 + Unit of Work Testing + Bootstrap.

Custom MVC Validations – A Quick Walkthrough

by Web Technobrat

A quick walkthrough for implementing client and server side validations in a variety of ways in ASP.NET MVC projects.

Validations using C# "DataAnnotation"

by Shivprasad koirala

In this short article, we will discuss how C# DataAnnotation library helps us to do validations.

All Articles

DataAnnotation

How to Create Custom Validation Attribute in C#

21 Jan 2020 by kr.is

How to create a simple validation attribute using C#

Get different display names for same property of model for different views

19 Aug 2018 by ganesh.dks

Hi, I am fairly new with Hands On MVC, So I wanted to know if there is a simple solution to my problem. I have a model class whose scaled down version is given below : - public class Driver { public int ID { get; set; } [Required] [Display(Name = "Name")] public string FName {...

What is data mining and application of data mining?

21 Jan 2020 by phil.o

Data Mining[^] Being able to do your own research is a skill which you should aim to acquire as soon as possible. And, like every skill, you only can obtain it by practicing.

Set a field to [required] based on User Role in MVC4

14 Jun 2013 by vishnutejcj

HiI am stuck with this tricky problem.I've a control whose visibility will be set based on user role. In this case i can't set this property as required.[Required(ErrorMessage = Client Name is required)][Display(Name ="Client Name")]public string SelectedClientName { get; set;...

Set a field to [required] based on User Role in MVC4

14 Jun 2013 by Dave Kreskowiak

You can see if this[^] helps.If not, there's a bunch more options if you Google for "mvc dynamic required field[^]".

Set a field to [required] based on User Role in MVC4

20 Jun 2013 by samadhan_kshirsagar

hi please visit this linkhttp://stackoverflow.com/questions/14321815/mvc4-data-annotation-validation-based-on-different-user-roles-using-entity-frame[^]

Displaying Validations using dataannotaions

23 Jun 2013 by Jameel VM

Go through this linkhttp://amanek.com/building-data-annotations-validator-control-with-client-side-validation/[^]Hope this helps

Displaying Validations using dataannotaions

24 Jun 2013 by shivammpi123

Can you show me your view code....It should be like this view code@using (@Html.BeginForm("ImportContacts", "Outlook", FormMethod.Post, new { id = "Importform" })){ @Html.ValidationSummary(true, "Please fill the form correctly and try again."); ...

How to disable validation for spesific row Asp.Net MVC

12 Aug 2014 by Fatihx

I code a project with ASP.NET MVC using Entity Framework. I have acontroller which has one action(Save action which commit changes to database).I want to bypass "Answer" property out of validation without using DataAnnotations. In View, i tried some code but i failed. Because of my dynamic...

How to disable validation for spesific row Asp.Net MVC

12 Aug 2014 by Manoj B. Kalla

Dear Fatihx,Just remove a [Required . . line from above public string AnswerYour clientside validation would be goes off.If, this is your solution, you are looking for then select as answer.Thank You.Manoj Kalla

How to disable validation for spesific row Asp.Net MVC

12 Aug 2014 by Manoj B. Kalla

Dear Fatihx,For other page you have to write in GET/POST method, check as per your situation.ModelState.Remove("Answer")sure, it will work.Thank You.Manoj Kalla

How to disable validation for spesific row Asp.Net MVC

13 Aug 2014 by NowYouSeeMe

the ideal way is to use viewmodeleg:public Answer{ [Key] public int AnswerId { get; set; } public int QuestionId { get; set; } public int CompanyId { get; set; } [Required(ErrorMessage = "***")] public string Answer { get; set;...

how to use dataAnnotation in wpf with storedprocedure and entity framework

20 Aug 2014 by mymina

hi alli have a project in wpf that use Sql Server and Entity Framework Database First.And for crud in database, i'm force use stored procedure.now,for validation data:i do'nt know how to use in classes.please help me for validation property with stored procedure.

stored-procedure

Apply Multiple Data Annotation in MVC

15 Oct 2014 by Nimit Joshi

I want to apply multiple data annotation on a property named Year.Following is my code:[Required(Error Message="Year is Required")][Range(1900, 2050, ErrorMessage = "Enter the Valid Year")]public string YearWhen i enter an invalid year then it is working fine but when i do not...

Dependent DataAnnotations MVC

10 Jun 2015 by Ben J. Boyle

Couple of options:1) Make your model class inherit from IValidatableObject and implement the validate method, see https://msdn.microsoft.com/en-us/library/system.componentmodel.dataannotations.ivalidatableobject.aspx[^]That though is not using the Data Annotations, but...2)...

How to restrict the remote validation in Edit mode in MVC5

28 Dec 2020 by Member 12021470

I have a Remote attribute on the ProductCode property of Product model. When I create a new Product it works perfect and tells the user that an ProductCode is already in use. Now I'm having a problem in my editing form (if the user wants to updates values). It tells the user that his/her...

How to restrict the remote validation in Edit mode in MVC5

4 Mar 2016 by Member 1966294

In the View Add Hidden field@Html.Hidden(initialProductCode, Model.ProductCode)In the Remote attribute Add AdditionalFields[Remote("ValidateProductcode", "Controller", ErrorMessage = "Product Code already exists.", AdditionalFields = "initialProductcode")]and the Controller action...

Email texbox is not validation to my form?

18 Mar 2020 by OriginalGriff

Try getting rid of the spurious whitespace, escape the "reserv ed characters" and start your email with a "start of text" marker: [a - z0 - 9._ % +-] +@[a-z0-9.-]+\.[a-z]{2,}$ Becomes^[a-z0-9\._%+\-]+@[a-z0-9\.\-]+\.[a-z]{2,}$

Is there any alternative of data annotations in MVC ?

4 May 2020 by Abhishek Duppati

An alternative for Data Annotations in MVC would be the Validation Application Block. We can consider using the Validation Application Block if we want to encapsulate validation good practice into easily maintainable code that can be reused. With...

How to validate when leaving texbox in ASP.NET using data-anotation?

31 Jul 2020 by gcogco10

Hi Team I want to validate when leaving the textbox on my form, but i able to validate on a client side, i havent experience using data-anotation in asp.net and need bit of a help. When leaving the textbox if its empty must validate using...

How to validate when leaving texbox in ASP.NET using data-anotation?

31 Jul 2020 by Jin Vincent Necesario

Hi, You can easily use the regular expression attribute and set the expression inside that attribute and it should be on top of a property of a class. [RegularExpression ("[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,}$", ErrorMessage = "Invalid...

Expressiveannotations client side validation not firing

25 Sep 2020 by Member 14908411

I am using Expressive annotations to handle RequiredIf conndition My Model [RequiredIf("IsSellable == false", ErrorMessage ="Offer code is required!")] public string Code { get; set; } public bool IsSellable { get; set; } whenever I click...

Expressiveannotations client side validation not firing

25 Sep 2020 by BillWoodruff

From the Expressive Annotations GitHub : [^]Quote: RequiredIf attribute is not working, what is wrong? Make sure RequiredIf is applied to a field which accepts null values. In the other words, it is redundant to apply this attribute to a field...

Required validation not working in MVC

N 24 Apr 2024 by Member 11307750

the required validation not working in mvc,After creating the view ,when i click on the submit button,no response from the form What I have tried: using System.ComponentModel.DataAnnotations; namespace Trial.Models { public class Product ...

Required validation not working in MVC

N 24 Apr 2024 by Pete O'Hanlon

Try changing your Required annotation to Required(AllowEmptyStrings=false) to take care of situations where the string is an empty string.

Developing a sample project in Repository Design Pattern with the combination of Entity Frameworks (Code First), Unit of Work Testing, Web API, ASP.NET MVC 5 and Bootstrap

24 Oct 2016 by Kelum Priyadarshane

This project developed using combination of Entity Framework 6.0 + Code First Approach + Web API 2 + Repository Pattern + ASP.NET MVC 5 + SQL Server 2012 + Unit of Work Testing + Bootstrap.

Custom MVC Validations – A Quick Walkthrough

27 Sep 2015 by Web Technobrat

A quick walkthrough for implementing client and server side validations in a variety of ways in ASP.NET MVC projects.

Validations using C# "DataAnnotation"

11 May 2015 by Shivprasad koirala

In this short article, we will discuss how C# DataAnnotation library helps us to do validations.

WPF Base ViewModel

6 Feb 2015 by ogomerub

ViewModel base for all ViewModels. Validation system with DataAnnotations and IDataErrorInfo

MVC dataannotations / validator -- reuse metadata from 'master' class for the children (viewmodels)?

3 May 2013 by gicalle75

question: how can you keep things DRY by only applying metadata information for dataannotations and validation on the master class, and then reuse this on the viewmodels?example:class book (domain model) and the metadataImports...

French Date Format Validation Data Anotation C#

16 Apr 2014 by medessad

I am developping an application with ASP .Net MVC 4 which is french language based, almost of the treatements i have in my app, are based on dates.For the date textfield i use jQuery DatePicker and i disable hand modifyig fields.In my Model, i add[DataType(DataType.Date)]But when...

Apply Multiple Data Annotation in MVC

15 Oct 2014 by Nelek

From the few code you have posted, it is difficult to know exactly where the error comes. As I can see your "Year" is a String, so you are probably converting it to int when entered, so you can validate with your range.Some possiblities that I can imagine:- If the string is empty, the...

Regex for any type of numeric value

26 May 2015 by _Asif_

Try this "\d+(\.\d+)?". You can find plenty of examples over the net. Just Google!

regular-expression

What is data mining and application of data mining?

21 Jan 2020 by Patrice T

Quote: no. i do not found relevant answer.i do not found most appropriate answer. You need to learn to cope with search engines, if something is on internet, they know. Wikipedia is a good place to search too. Data mining - Wikipedia[^]

What is data mining and application of data mining?

21 Jan 2020 by zamsha javed

what is meant by data mining? what are application where data mining concepts are applied? what is scope of data mining? What I have tried: no. i do not found relevant answer.i do not found most appropriate answer.

Displaying Validations using dataannotaions

23 Jun 2013 by naikotiarun

Hi.,I am new to Entity Framework, I have created a EDM using Model first appraoch and applied validations using datannotations, everything is working fine but all the validations are displayed at one place but i would like to show validation error messages beside the respective field.The...

Regex for any type of numeric value

26 May 2015 by Amit Samnani

Hi,everyone Question: i have one text-box and i want to allow only numeric value to this text-box like i.e .2,2.3,23.233 Solution: For the above, i already try regex ("^\s*(?=.*[1-9])\d*(?:\.\d{1,4})?\s*$")but still it can`t be allow after point value like...

regular-expression

Regex for any type of numeric value

26 May 2015 by Bernhard Hiller

Better usedouble val;if (double.TryParse(YourTextbox.Text, out val)){ //OK}else{ //not numeric}That strategy will also cope with different regional settings (what about a decimal comma instead of a decimal point?).

regular-expression

How to turn off validation

2 Jul 2015 by SDavisworth

HelloI'm using Data Annotation in a Calburn Micro framework to validate my user input. User selects a date that needs to be 3 days in the future. Record is saved to db. 4 days later the record is opened again and validation kicks in on the selected date. What I need to do is turn off...

Dependent DataAnnotations MVC

10 Jun 2015 by Adil S

I was asked a question in an interview regarding validation with data annotations in MVC.I have a drop down list and two text boxes.If some value is selected from the drop down (say "XYZ"), then the apply validation on textboxes to be required else, textboxes can be left blank on...

Email texbox is not validation to my form?

18 Mar 2020 by gcogco10

Hi Team im creating mvc asp.net form, i have model and view to do this for my email .But the problem my email textbox is not validating and have used data annotation from model side and view side i have this logic below. Please help me mates to...