protected void categorySaveButton_OnClick(object sender, EventArgs e)
        {
            CategoryInput input = new CategoryInput();

            input.Name = CategoryInputTextBox.Text;

            string message = maneger.Save(input);

            output.Text = message;

            CategorySetupGridView.DataSource = maneger.GetAllCategory();
            CategorySetupGridView.DataBind();
        }
 protected void Page_Load(object sender, EventArgs e)
 {
     CategorySetupGridView.DataSource = maneger.GetAllCategory();
     CategorySetupGridView.DataBind();
 }