private int checkSN(TextBox box)
{
int dot = 0;
if (int.TryParse(box.Text, out dot))
{
if (dot < 8 || dot > 32)
{
box.BackColor = Color.Red;
ERRBox.AppendText("Ungueltiges Subnetz" + Environment.NewLine);
}
else
{
box.BackColor = Color.Green;
}
}
else
{
box.BackColor = Color.Red;
ERRBox.AppendText("Ungueltiges Subnetz" + Environment.NewLine);
}
return(dot);
}
private int checkIP(TextBox box)
{
int dot = 0;
if (int.TryParse(box.Text, out dot))
{
if (dot < 0 || dot > 255)
{
box.BackColor = Color.Red;
ERRBox.AppendText("Ungueltige Zahl im" + getTextBoxName(box.Name) + Environment.NewLine);
}
else
{
box.BackColor = Color.Green;
}
}
else
{
box.BackColor = Color.Red;
ERRBox.AppendText("Ungueltige Zeichen im" + getTextBoxName(box.Name) + Environment.NewLine);
}
return(dot);
}