protected void CreateCategoryButton_Click(object sender, EventArgs e)
{
if (this.NewCategoryNameBox.Text == string.Empty || this.NewCategoryNameBox.Text.Length > 30)
{
this.MessagesTextbox.Text = "Invalid category input data.";
return;
}
var context = new ListDBEntities();
var newCategory = new Category();
newCategory.Name = this.NewCategoryNameBox.Text;
context.Categories.Add(newCategory);
context.SaveChanges();
this.DropDownListCategories.DataBind();
context.Dispose();
}
protected void DeleteCategoryButton_Click(object sender, EventArgs e)
{
var context = new ListDBEntities();
var idValue = int.Parse(this.DropDownListCategories.SelectedValue);
var categoryToRemove = context.Categories.SingleOrDefault(c => c.Id == idValue);
if (categoryToRemove == null)
{
this.MessagesTextbox.Text = "Category does not exist.";
return;
}
context.Categories.Remove(categoryToRemove);
context.SaveChanges();
this.DropDownListCategories.DataBind();
context.Dispose();
}
protected void EditCategoryButton_Click(object sender, EventArgs e)
{
if (this.EditCategoryNameBox.Text == string.Empty || this.EditCategoryNameBox.Text.Length > 30)
{
this.MessagesTextbox.Text = "Invalid category input data.";
return;
}
var context = new ListDBEntities();
var idValue = int.Parse(this.DropDownListCategories.SelectedValue);
var editedCategory = context.Categories.SingleOrDefault(c=> c.Id == idValue);
if (editedCategory == null)
{
this.MessagesTextbox.Text = "Invalid category input data.";
return;
}
editedCategory.Name = this.EditCategoryNameBox.Text;
context.SaveChanges();
this.DropDownListCategories.DataBind();
context.Dispose();
}