private void BackToWindow(object sender, RoutedEventArgs e)
{
ChangeCurrencyBuyExchangeCourse changeCurrencyBuyExchangeCourse = new ChangeCurrencyBuyExchangeCourse();
changeCurrencyBuyExchangeCourse.Show();
this.Close();
}
private void ChangeCurrencyBuyData_Click(object sender, RoutedEventArgs e)
{
ChangeCurrencyBuyExchangeCourse changeCurrencyBuyExchangeCourse = new ChangeCurrencyBuyExchangeCourse();
changeCurrencyBuyExchangeCourse.Show();
this.Close();
}
private void SaveChanges(object sender, RoutedEventArgs e)
{
SqlConnection connection = new SqlConnection(connectionString);
connection.Open();
if (criterion.Text != string.Empty && searchCriterion.Text != string.Empty)
{
int currencyCode = Convert.ToInt32(searchCriterion.Text);
if (criterion.Text == "Название валюты")
{
if (changingCriterion.Text != CheckCurrency.CheckCurrencyName(changingCriterion.Text))
{
System.Windows.MessageBox.Show(CheckCurrency.CheckCurrencyName(changingCriterion.Text));
return;
}
string mySelectQuery = "SELECT * FROM CurrencyBuy WHERE CurrencyBuyName = '" + changingCriterion.Text + "'";
using (SqlDataAdapter dataAdapter = new SqlDataAdapter(mySelectQuery, connection))
{
DataTable table = new DataTable();
dataAdapter.Fill(table);
if (table.Rows.Count > 0)
{
System.Windows.MessageBox.Show("Вы не можете изменить данные, так как эта валюта уже есть в базе.");
return;
}
else if (table.Rows.Count == 0)
{
using (SqlCommand lastCommnd = connection.CreateCommand())
{
lastCommnd.CommandText = "UPDATE CurrencyBuy SET CurrencyBuyName = @name WHERE CurrencyBuyCode = @code";
lastCommnd.Parameters.AddWithValue("@name", changingCriterion.Text);
lastCommnd.Parameters.AddWithValue("@code", currencyCode);
lastCommnd.ExecuteNonQuery();
}
}
}
}
else if (criterion.Text == "Курс валюты")
{
if (changingCriterion.Text != CheckCurrency.CheckCurrencyCourse(changingCriterion.Text))
{
System.Windows.MessageBox.Show(CheckCurrency.CheckCurrencyCourse(changingCriterion.Text));
return;
}
using (SqlCommand lastCommnd = connection.CreateCommand())
{
lastCommnd.CommandText = "UPDATE CurrencyBuy SET CurrencyBuyCourse = @course WHERE CurrencyBuyCode = @code";
lastCommnd.Parameters.AddWithValue("@course", Convert.ToDouble(changingCriterion.Text));
lastCommnd.Parameters.AddWithValue("@code", currencyCode);
lastCommnd.ExecuteNonQuery();
}
}
}
else
{
System.Windows.MessageBox.Show("Вы не выбрали данные для изменения.");
return;
}
MessageBoxResult mboxResult = System.Windows.MessageBox.Show("Данные обновлены. Желаете изменить что-нибудь еще?", "Предупреждение", MessageBoxButton.YesNo);
if (mboxResult == MessageBoxResult.No)
{
ChangeCurrencyBuyExchangeCourse changeCurrencyBuyExchangeCourse = new ChangeCurrencyBuyExchangeCourse();
changeCurrencyBuyExchangeCourse.Show();
this.Close();
}
connection.Close();
}
