protected void Delete_Click(object sender, EventArgs e)
{
GridViewRow row = ((Button)sender).Parent.Parent as GridViewRow;
var categoryId = int.Parse(CategoriesGrid.DataKeys[row.RowIndex].Value.ToString());
LibrarySystemDbContext data = new LibrarySystemDbContext();
var category = data.Categories.FirstOrDefault(x => x.Id == categoryId);
CategoryDelete.DataSource = new List <Category> {
category
};
CategoryDelete.DataBind();
}
protected void SaveDelete_Click(object sender, EventArgs e)
{
var id = int.Parse(CategoryDelete.DataKey.Value.ToString());
LibrarySystemDbContext data = new LibrarySystemDbContext();
var category = data.Categories.FirstOrDefault(x => x.Id == id);
data.Books.RemoveRange(category.Books);
data.Categories.Remove(category);
data.SaveChanges();
CategoryDelete.DataSource = null;
CategoryDelete.DataBind();
CategoriesGrid.DataBind();
}
protected void CancelDelete_Click(object sender, EventArgs e)
{
CategoryDelete.DataSource = null;
CategoryDelete.DataBind();
}