private void buttonFIndAuthor_Click(object sender, EventArgs e)
{
textBoxShow.Clear();
string author = textBoxFindAuthor.Text + "\r";
if (author.Length > 0)
{
string path = @"C:\Books_Library";
string path_file = @"C:\Books_Library\lib.txt";
DirectoryInfo dirInfo = new DirectoryInfo(path);
if (!dirInfo.Exists || dirInfo.GetFiles().Length == 0)
{
MessageBox.Show("Нет такого файла или каталога.");
}
else if (dirInfo.Exists && dirInfo.GetFiles().Length == 1)
{
StreamReader file = new StreamReader(path_file);
string text_info;
text_info = file.ReadToEnd();
file.Close();
string[] words = text_info.Split('\n');
for (int i = 0; i < words.Length - 1; i += 4)
{
if (author == words[i])
{
Book book = new Book(words[i], words[i + 1], words[i + 2], Convert.ToInt32(words[i + 3]));
//textBoxShow.Text += words[i] + words[i + 1] + words[i + 2] + Convert.ToInt32(words[i + 3]);
//textBoxShow.Text += words[i];
textBoxShow.Text += book.ToString() + "\r\n";
}
}
}
}
else
{
MessageBox.Show("Введите значение для поиска.");
}
}
/// <summary>
/// Provides formatting
/// </summary>
/// <param name="format">The format given</param>
/// <param name="arg">The object to provide format onto</param>
/// <param name="formatProvider">IFormatProvider instance</param>
/// <returns>Formatted string</returns>
public string Format(string format, object arg, IFormatProvider formatProvider)
{
if (!(arg is Book))
{
try
{
return(this.HandleOtherFormats(format, arg));
}
catch (FormatException ex)
{
throw new FormatException(nameof(ex));
}
}
Book book = arg as Book;
if (string.IsNullOrEmpty(format))
{
return(book.ToString());
}
bool wasFormatted = false;
foreach (char c in format)
{
switch (c)
{
case 'I':
if (wasFormatted)
{
result += ", ";
}
else
{
wasFormatted = true;
}
result += "ISBN 13: ";
result += book.ISBN;
break;
case 'A':
if (wasFormatted)
{
result += ", ";
}
else
{
wasFormatted = true;
}
result += book.Author;
break;
case 'T':
if (wasFormatted)
{
result += ", ";
}
else
{
wasFormatted = true;
}
result += "\"";
result += book.Title;
result += "\"";
break;
case 'Y':
if (wasFormatted)
{
result += ", ";
}
else
{
wasFormatted = true;
}
result += book.Year;
break;
case 'P':
if (wasFormatted)
{
result += ", ";
}
else
{
wasFormatted = true;
}
result += book.Price;
result += "$";
break;
case 'R':
if (wasFormatted)
{
result += ", ";
}
else
{
wasFormatted = true;
}
result += book.Publisher;
break;
case 'N':
if (wasFormatted)
{
result += ", ";
}
else
{
wasFormatted = true;
}
result += "P. ";
result += book.NumOfPages;
break;
}
}
if (string.IsNullOrEmpty(result))
{
try
{
this.HandleOtherFormats(format, arg);
}
catch (FormatException ex)
{
throw new FormatException(nameof(ex));
}
}
return(result);
}
