private static void TestValidationProperty()
{
using (var context = new InstituteEntities())
{
//create entity
var student = context.Students.Create();
student.StudentLastName = "Siddiqui";
student.GradePointAverage = 5;
var department = context.Departments.Create();
department.DepartmentName = "Electrical Engineering";
//add it to context
context.Students.Add(student);
context.Departments.Add(department);
//validate entity
ICollection<DbValidationError> validationErrors =
context.Entry<Student>(student)
.Property<string>(s => s.StudentLastName)
.GetValidationErrors();
string errorMessage =
DbEntityValidationMessageParser.GetErrorMessage(validationErrors);
//Print Message
Console.WriteLine(errorMessage);
}
}
private static void TestValidationEntity()
{
using (var context = new InstituteEntities())
{
//create entity
var student = context.Students.Create();
student.GradePointAverage = 2;
student.IsOutStanding = true;
var department = context.Departments.Create();
department.DepartmentName = "Electrical Engineering";
//add it to context
context.Students.Add(student);
context.Departments.Add(department);
//validate only student entity
DbEntityValidationResult validationResult =
context.Entry<Student>(student).GetValidationResult();
string errorMessage =
DbEntityValidationMessageParser.GetErrorMessage(validationResult);
//Print Message
Console.WriteLine(errorMessage);
}
}
private static void TestValidationAllEntities()
{
using (var context = new InstituteEntities())
{
//create entity
var student = context.Students.Create();
student.StudentLastName = "Siddiqi";
student.GradePointAverage = 5;
var department = context.Departments.Create();
department.DepartmentName = "Electrical Engineering";
//add it to context
context.Students.Add(student);
context.Departments.Add(department);
//validate entity
IEnumerable<DbEntityValidationResult> validationResults = context.GetValidationErrors();
string errorMessage = DbEntityValidationMessageParser.GetErrorMessage(validationResults);
//Print Message
Console.WriteLine(errorMessage);
}
}
private static void TestValidatonAll()
{
using (var context = new InstituteEntities())
{
//create entity
var student = context.Students.Create();
student.StudentLastName = "Siddiqi";
student.GradePointAverage = 5;
var department = context.Departments.Create();
department.DepartmentName = "Electrical Engineering";
//add it to context
context.Students.Add(student);
context.Departments.Add(department);
try
{
//save changes
context.SaveChanges();
}
catch (DbEntityValidationException validationException)
{
//Console.WriteLine(validationException.)
string validationErrorMessage =
DbEntityValidationMessageParser.GetErrorMessage(validationException);
Console.WriteLine(validationErrorMessage);
}
}
}
