public static CDCatalogEF.Genre AddGenre(string genreName)
{
if (genreName == null)
{
// Define a new top-level error message.
string str = "You did not enter a Genre Name. Cancel this operation?";
// Pop-up a messagebox with the message
MessageBox.Show(str);
return(null);
}
var genre = new CDCatalogEF.Genre();
try
{
genre.GenreName = genreName;
using (var db = new CDCatalogEntities())
{
db.Genres.Add(genre);
var resultCount = db.SaveChanges();
}
}
catch (Exception ex)
{
// Define a new top-level error message.
string str = "Adding the Genre by Name failed. " + ex.Message;
// Pop-up a messagebox with the message
MessageBox.Show(str);
}
return(genre);
}
private void AddGenreButton_Click(object sender, EventArgs e)
{
// In the AddAlbum form, the user clicked the AddGenre button
// this opens the AddGenre pop-up
DialogResult dr = new DialogResult();
AddGenreWF frm = new AddGenreWF();
// When the AddGenre pop-is closed, determine why.
dr = frm.ShowDialog();
if (dr == DialogResult.OK)
{
// MessageBox.Show("User clicked OK button");
// Get the newly created genre object
CDCatalogEF.Genre genre = (Genre)this.addGenreButton.Tag;
// Show updated list in the combo box
this.genreTableAdapter.Fill(this.cDCatalogDataSet3.Genre);
//Show the selected item
this.genreComboBox.SelectedIndex = this.genreComboBox.FindString(genre.GenreName);
this.Close();
}
else if (dr == DialogResult.Cancel)
{
MessageBox.Show("AddGenre: User clicked Cancel button");
this.Close();
}
}
public static bool DeleteGenreById(int genreId)
{
try
{
using (var db = new CDCatalogEntities())
{
CDCatalogEF.Genre genre = db.Genres.Where(n => n.Equals(genreId)).Single();
db.Genres.Remove(genre);
return(true); //if there is an exception, this won't run
}
}
catch (Exception ex)
{
// Define a new top-level error message.
string str = "Deleting the Genre failed. " + ex.Message;
// Pop-up a messagebox with the message
MessageBox.Show(str);
}
return(false);
}
public static CDCatalogEF.Genre GetGenreById(int genreId)
{
var genre = new CDCatalogEF.Genre();
try
{
using (var db = new CDCatalogEntities())
{
genre = db.Genres.Where(a => a.GenreID == genreId).FirstOrDefault();
}
}
catch (Exception ex)
{
// Define a new top-level error message.
string str = "Getting the Genre failed. " + ex.Message;
// Pop-up a messagebox with the message
MessageBox.Show(str);
}
return(genre);
}
