C#代码验证IP地址，包含格式和是否超过255的限制
/// <summary>
/// Check IP Address, will accept 0.0.0.0 as a valid IP
/// </summary>
/// <param name="strIP"></param>
/// <returns></returns>
public Boolean CheckIPValid(String strIP)
{
// Split string by ".", check that array length is 3
char chrFullStop = '.';
string[] arrOctets = strIP.Split(chrFullStop);
if (arrOctets.Length != 4)
{
return false;
}
// Check each substring checking that the int value is less than 255 and that is char[] length is !> 2
Int16 MAXVALUE = 255;
Int32 temp; // Parse returns Int32
foreach (String strOctet in arrOctets)
{
if (strOctet.Length > 3)
{
return false;
}
temp = int.Parse(strOctet);
if (temp > MAXVALUE)
{
return false;
}
}
return true;
}
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