【效果】
【代码】
string v = "105120000";
string n = "";
for (int i = v.Length - 1, l = 1; i >= 0; i--)
{
n = v[i].ToString() + n;
if (l > 0 && i > 0 && l % 3 == 0)
{
n = "," + n;
l = 0;
}
l++;
}
string v = "105120000";
string n = "";
for (int i = v.Length - 1, l = 1; i >= 0; i--)
{
n = v[i].ToString() + n;
if (l > 0 && i > 0 && l % 3 == 0)
{
n = "," + n;
l = 0;
}
l++;
}