private void btn_delete_substring_Click(object sender, EventArgs e)
{
if (txt_del_string.Text.Trim() == "")
{
MessageBox.Show("Enter string to delete");
txt_del_string.Focus();
}
else
{
chain_process chain = new chain_process();
txt_output.Text = chain.delete(txt_input.Text, txt_del_string.Text);
}
}
private void btn_occurrences_Click(object sender, EventArgs e)
{
if (txt_num_occurrences.Text.Trim() == "")
{
MessageBox.Show("Enter character to find");
txt_num_occurrences.Focus();
}
else
{
chain_process chain = new chain_process();
txt_output.Text = "Number of appeared: " + chain.Number(txt_input.Text, txt_num_occurrences.Text.Trim()).ToString();
}
}
private void btn_insert_string_Click(object sender, EventArgs e)
{
if (txt_insert.Text.Trim() == "")
{
MessageBox.Show("Enter string to insert");
txt_insert.Focus();
}
else
{
chain_process chain = new chain_process();
int p = int.Parse(txt_insert_position.Text);
txt_output.Text = chain.insert(txt_input.Text, txt_insert.Text, p);
}
}
private void btn_change_substring_Click(object sender, EventArgs e)
{
if (txt_replace_string.Text.Trim() == "")
{
MessageBox.Show("Enter string to replace");
txt_replace_string.Focus();
}
else
{
if (txt_new_string.Text.Trim() == "")
{
MessageBox.Show("Enter string to replace");
txt_new_string.Focus();
}
else
{
chain_process chain = new chain_process();
txt_output.Text = chain.change(txt_input.Text, txt_replace_string.Text, txt_new_string.Text);
}
}
}