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    <p>What you should do is finding a architecture which is fits your solution model. In general I would do validation before creating the context. If you need more validation in your application you may want to create a validation layer for this purpose.</p> <pre><code>public class RuleViolation { public string Property {get; set;} public string Message {get; set;} } public class Program { public static List&lt;RuleViolation&gt; GetRuleViolations(string[] parameters) { List&lt;RuleViolation&gt; validations = new List&lt;RuleViolation&gt;(); if(!int.TryParse(parameters[0], out new Int32())) { validations.Add(new RuleViolation{Message ="Input1 must be integer.", Property = "input1"}); } //more validation return validations; } public static void Main(string[] parameters) { var validations = GetRuleViolations(parameters); if(validations.Any()) { validations.ForEach(x=&gt; Console.WriteLine(x.Message)); return; } int input1 = int.Parse(parameters[0]); //after all your business logic are ok, then you can go to persistence layer to hit the database. using (var context = new entityTestEntities2()) { try { var allCustomers = context.setcust(null, input1); } catch(SqlException exc) { //here you might still get some exceptions but not about validation. ExceptionManager.Log(exc); //sometimes you may want to throw the exception to upper layers for handle it better over there! throw; } } } } </code></pre> <p>Hope the example make more clearer the architecture about validation logic.</p>
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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