how to validate validations whether textbox is empty or not. using linq to sql. in mvc

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Chris Anderson · Answer

hi,you can put validation using linq to sql query something like below:
DataContext data = new DataContext();string value="S001";var query = from p in data.Personsand and and and and and and and and and and and and and and and and and  where p.Id == 
valueand and and and and and and and and and and and and and and and and and and and and and and and and and and and and and and and and  select p;
 if (query.Count() andgt; 0) throw new Exception("Id already 
exists in the database");

venkat gosetty · Answer

Actuallyand  i have taken model class .dbml (linq to sql template)

Chris Anderson · Answer

hi venkat,if you want validate your textbox, simply use:namespace:using System.ComponentModel.DataAnnotations;and above the property add following:[StringLength(50),Required]
public string Name { get; set; }
why you use linq to sql for validation?

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how to validate validations whether textbox is empty or not. using linq to sql. in mvc

venkat gosetty

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