有什么方法可以在C＃中找到字符串是数字（int，long，float或double）的方法吗？

Question

Is there any class in C# similar to Numberformat class in Java which, verify the string is a number.

NumberFormat numberFormat = NumberFormat.getInstance();
Number number = numberFormat.parse(string);

---

while trying for float with following parameter float.TryParse(value, NumberStyles.Float, CultureInfo.InvariantCulture, out fValue),

the value=6666.77777 is rounded of to 6666.778.

can anyone help, i don't want my value to be rounded.

Answer 1

use int.TryParse it will return true if the number is int.

• int.TryParse for integers.
• float.TryParse for floats.
• double.TryParse for doubles
• Int64.TryParse for long.

eg

string str = "123";
int temp;
if (int.TryParse(str, out temp))
{
    //its an int
}
else
{
    // not an int
}

Answer 2

int a
bool isNumber = int.TryParse("500", out a);

replace int with whatever number you want to check for