public static bool IsValidCPF(this string CPF)
{
CPF = CPF.ClearStrings();
if (CPF.Length < 11)
return false;
for (int i = 0; i < CPF.Length; i++)
Convert.ToInt32(CPF[i].ToString());
if (CPF == "00000000000" || CPF == "11111111111" || CPF == "22222222222" || CPF == "33333333333" || CPF == "44444444444" || CPF == "55555555555" || CPF == "66666666666" || CPF == "77777777777" || CPF == "88888888888" || CPF == "99999999999")
return false;
int[] a = new int[11];
int b = 0;
int c = 10;
int x = 0;
for (int i = 0; i < 9; i++)
{
a[i] = Convert.ToInt32(CPF[i].ToString());
b += (a[i] * c);
c--;
}
x = b % 11;
if (x < 2)
a[9] = 0;
else
a[9] = 11 - x;
b = 0;
c = 11;
for (int i = 0; i < 10; i++)
{
b += (a[i] * c);
c--;
}
x = b % 11;
if (x < 2)
a[10] = 0;
else
a[10] = 11 - x;
if ((Convert.ToInt32(CPF[9].ToString()) != a[9]) || (Convert.ToInt32(CPF[10].ToString()) != a[10]))
return false;
return true;
}
public static bool IsValidCNPJ(this string CNPJ)
{
CNPJ = CNPJ.ClearStrings();
if (CNPJ.Length < 14)
return false;
for (int i = 0; i < 14; i++)
Convert.ToInt32(CNPJ[i].ToString());
int[] a = new int[14];
int b = 0;
int[] c = { 6, 5, 4, 3, 2, 9, 8, 7, 6, 5, 4, 3, 2 };
int x = 0;
for (int i = 0; i < 12; i++)
{
a[i] = Convert.ToInt32(CNPJ[i].ToString());
b += a[i] * c[i + 1];
}
x = b % 11;
if (x < 2)
a[12] = 0;
else
a[12] = 11 - x;
b = 0;
for (int j = 0; j < 13; j++)
b += (a[j] * c[j]);
x = b % 11;
if (x < 2)
a[13] = 0;
else
a[13] = 11 - x;
if ((Convert.ToInt32(CNPJ[12].ToString()) != a[12]) || (Convert.ToInt32(CNPJ[13].ToString()) != a[13]))
return false;
return true;
}
