/// <summary>
/// Updates file
/// </summary>
/// <param name="product">The product to be updated</param>
public void GBRUpdate(GBRProduct product)
{
try
{
SaveToFile(product, true);
}
catch (Exception ex)
{
throw new Exception("Errors during update:\n" + ex.Message);
}
}
/// <summary>
/// Remove the product from file
/// </summary>
/// <param name="product">Remove from file</param>
public void GBRDelete(GBRProduct product)
{
try
{
DeleteAndSaveFile(product);
}
catch (Exception ex)
{
throw new Exception("Errors during delete:\n" + ex.Message);
}
}
/// <summary>
/// Delete the supplied product and save file.
/// </summary>
/// <param name="product">The product to be delete.</param>
private void DeleteAndSaveFile(GBRProduct product)
{
// get all
List <GBRProduct> list = GBRGetProducts();
// prevent duplicate
list.RemoveAll(p => p.ProductName.ToLower().Equals(product.ProductName.ToLower()));
using (writer = new StreamWriter(FILE_NAME, false))
{
list.ForEach(p => writer.WriteLine(p.ToString()));
}
}
/// <summary>
/// Attempts to write on file
/// </summary>
/// <exception cref="Exception">With all errors in the message.</exception>
public void GBRAdd(GBRProduct product)
{
product.isInsert = true;
try
{
product.SaveToFile(product);
}
catch (Exception ex)
{
throw new Exception("Errors during insertion:\n" + ex.Message);
}
}
/// <summary>
/// Save this instance to file
/// </summary>
private void SaveToFile(GBRProduct product, bool isUpdate = false)
{
Edit(); // try to validate the product
// get all
List <GBRProduct> list = GBRGetProducts();
if (isUpdate)
{
// prevent duplicate
list.RemoveAll(p => p.ProductName.ToLower().Equals(product.ProductName.ToLower()));
}
list.Add(product);
using (writer = new StreamWriter(FILE_NAME, false))
{
list.ForEach(p => writer.WriteLine(p.ToString()));
}
}