protected void OnBtnAddTown_Click(object sender, EventArgs e)
{
var dbContext = new EarthDbEntities();
using (dbContext)
{
int countryId = int.Parse(this.DropDownListCountries.SelectedValue);
var country = dbContext.Countries.Find(countryId);
if (country != null)
{
var newTown = new Town()
{
Country = country,
Name = this.TextBoxTownName.Text,
Population = this.TextBoxTownPopulation.Text
};
dbContext.Towns.Add(newTown);
dbContext.SaveChanges();
this.Response.Redirect("AppMain.aspx");
}
}
}
protected void OnBtnAddCountry_Click(object sender, EventArgs e)
{
var dbContext = new EarthDbEntities();
using (dbContext)
{
int continentId = int.Parse(this.Request.Params["continentId"]);
var continent = dbContext.Continents.Find(continentId);
if (continent != null)
{
string countryName = this.TextBoxCountryName.Text;
int countryPopulation = int.Parse(this.TextBoxCountryPopulation.Text);
string countryLanguage = this.TextBoxCountryLanguage.Text;
var newCountry = new Country()
{
Continent = continent,
Language = countryLanguage,
Name = countryName,
Population = countryPopulation
};
dbContext.Countries.Add(newCountry);
dbContext.SaveChanges();
Response.Redirect("AppMain.aspx");
}
}
}
protected void OnBtnEditCountry_Click(object sender, EventArgs e)
{
var context = new EarthDbEntities();
using (context)
{
int countryId = int.Parse(this.Request.Params["countryId"]);
var country = context.Countries.Find(countryId);
if (country != null)
{
string name = this.TextBoxCountryName.Text;
string language = this.TextBoxCountryLanguage.Text;
int population = int.Parse(this.TextBoxCountryPopulation.Text);
country.Name = name;
country.Language = language;
country.Population = population;
context.SaveChanges();
Response.Redirect("AppMain.aspx");
}
}
}
protected void Page_PreRender(object sender, EventArgs e)
{
if (this.IsPostBack)
{
return;
}
var dbContext = new EarthDbEntities();
using (dbContext)
{
var countries = dbContext.Countries.OrderBy(town => town.Name).ToList();
this.DropDownListCountries.DataSource = countries;
this.DataBind();
}
}
protected void Page_Prerender(object sender, EventArgs e)
{
var context = new EarthDbEntities();
using (context)
{
int countryId = int.Parse(this.Request.Params["countryId"]);
var country = context.Countries.Find(countryId);
if (country != null)
{
this.TextBoxCountryName.Text = country.Name;
this.TextBoxCountryLanguage.Text = country.Language;
this.TextBoxCountryPopulation.Text = country.Population.ToString();
}
}
}
protected void OnBtnYes_Click(object sender, EventArgs e)
{
var dbContext = new EarthDbEntities();
using (dbContext)
{
int countryId = int.Parse(this.Request.Params["countryId"]);
var country = dbContext.Countries.Find(countryId);
if (country != null)
{
dbContext.Countries.Remove(country);
dbContext.SaveChanges();
}
this.Response.Redirect("AppMain.aspx");
}
}
