entity save example in c# model first

using (var context = new BloggingContext())
{
    // seeding database
    context.Blogs.Add(new Blog { Url = "http://example.com/blog" });
    context.Blogs.Add(new Blog { Url = "http://example.com/another_blog" });
    context.SaveChanges();
}

using (var context = new BloggingContext())
{
    // add
    context.Blogs.Add(new Blog { Url = "http://example.com/blog_one" });
    context.Blogs.Add(new Blog { Url = "http://example.com/blog_two" });

    // update
    var firstBlog = context.Blogs.First();
    firstBlog.Url = "";

    // remove
    var lastBlog = context.Blogs.Last();
    context.Blogs.Remove(lastBlog);

    context.SaveChanges();
}

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3.67

Awgiedawgie 440220 points

                                    exec sp_executesql N'INSERT [dbo].[Student]([StudentName], [StandardId])
VALUES (@0, NULL)
SELECT [StudentID] FROM [dbo].[Student]
WHERE @@ROWCOUNT &gt; 0 AND [StudentID] = scope_identity(),@0='Bill'

Thank you! 6

3.67 (6 Votes)

3.67

Phoenix Logan 186125 points

                                    using (var context = new BloggingContext())
{
    var blog = context.Blogs.First();
    blog.Url = &quot;http://example.com/blog&quot;;
    context.SaveChanges();
}

Thank you! 6

3.67 (6 Votes)

4.25

Awgiedawgie 440220 points

                                    using (var context = new BloggingContext())
{
    var blog = context.Blogs.First();
    context.Blogs.Remove(blog);
    context.SaveChanges();
}

Thank you! 4

4.25 (4 Votes)

Krish 100200 points

                                    // disconnected existing entity 
var student = new Student(){ StudentId = 1, StudentName = &quot;Steve&quot; };

using (var context = new SchoolDBEntities())
{
    context.Entry(student).State = student.StudentId == 0? EntityState.Added : EntityState.Modified;

    context.SaveChanges();
}

Thank you! 2

3 (2 Votes)

4.17

Awgiedawgie 440220 points

                                    // disconnected new entity 
var student = new Student(){ StudentName = &quot;Bill&quot; };

using (var context = new SchoolDBEntities())
{
    context.Entry(student).State = student.StudentId == 0? EntityState.Added : EntityState.Modified;

    context.SaveChanges();
}

Thank you! 6

4.17 (6 Votes)

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