There is an unknown word starting at index 0. The string was not recognized as a valid DateTime. here i am posting my view along with model. The main objective is to provide the comparison validation between two properties of a viewmodel or two similar columns in same form using <, > <, > operators for the datatype of numbers and datetimes.I tried this after struggling with Range DataAnnotation,i know it's not the best way to do this,but Range just did'nt worked for me it always given me this error: Please tell me why ComponentModel.DataAnnotations is not working here i have done every thing but in vain so tell me where i have mistakes in this code. This is a tip to add custom compare data annotation with client validation in ASP.NET MVC 5. The MVC runtime provides a validator to work with data annotations (DataAnnotationsModelValidator).This model validator can find all the validation. The following validation type was seen more than once: is Validation type names in unobtrusive client validation rules must be unique. It only takes about 10 lines of code to programmatically validate data annotations attached to entity classes. For example, in ASP.NET MVC, when a model is received by a controller method, ModelState.IsValid() can be used to tell if the received model respects all its. Step 2: Add the following code in MinAgeAttribute.cs class. Create a class MinAgeAttribute.cs in this folder. Step 1: Create a separate folder CustomAttribute in your project. NET application can use data annotations for validating data. This is just an example and after knowing that method of adding a custom attribute in data annotation, you can feed your own rules. I'm trying to do a condition on a attribute having DateTime as a type,it has to be greaterThan another attribute of the same Object and lessThan another which is also an attribute of the same Object.My probleme is when i try to apply these two DataAnnotation it gives me this error: Data annotations are not only for use in ASP.NET web applications. But I want to write a data annotation in my asp.net mvc web application that checks if the entered value is greater than or equal to 1 So can anyone tell me which data annotation to use Thanks.
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