C# 检查整数变量的长度
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Check the length of integer variable
提问by CrBruno
Is there a way to check a lenth of integer variable, and if is to long just trim it. I hava a field in database that accepts 3 character, lenth is 3.
有没有办法检查整数变量的长度，如果要长就修剪它。我在数据库中有一个接受 3 个字符的字段，长度为 3。
So is it possible to do like it's done with string variable
那么是否可以像使用字符串变量那样做
example:
例子：
cust_ref = cust_ref.Length > 20 ? cust_ref.Substring(0, 19) : cust_ref;
Thanks!
谢谢！
采纳答案by Cliff
The following worked a treat for me!
以下对我来说是一种享受！
public static int IntLength(int i)
{
if (i < 0)
throw new ArgumentOutOfRangeException();
if (i == 0)
return 1;
return (int)Math.Floor(Math.Log10(i)) + 1;
}
Original Source: http://www.java2s.com/Code/CSharp/Data-Types/Getthedigitlengthofanintvalue.htm
原始来源：http: //www.java2s.com/Code/CSharp/Data-Types/Getthedigitlengthofanintvalue.htm
回答by Romil Kumar Jain
cust_ref = cust_ref.ToString().Length > 20 ? Convert.ToInt32(cust_ref.ToString().Substring(0, 19)) : cust_ref;
or simply use
或者干脆使用
cust_ref = Convert.ToInt32(Convert.ToString(cust_ref).Substring(0, 19));
回答by Raab
Use like this
像这样使用
cust_ref= cust_ref.Tostring().Length > 20 ? Convert.ToInt32(cust_ref.ToString().Substring(0, 19)) : cust_ref;
回答by Tigran
Nont very clear what you're asking for, but as much as I unerstoodyou're asking for:
不是很清楚你在要求什么，但正如我所了解的那样，你要求的是：
int a = 1234567890;
for some reason you want to make it shorter, like
出于某种原因，你想让它更短，比如
int b = MakeShorter(a);
//b == 1234 (say)
If so, the easiest solution may be, convert it to string, made what you already implemented and reconvert it back to int.
如果是这样，最简单的解决方案可能是将其转换为字符串，制作您已经实现的内容并将其重新转换回 int。
If this is not what you're asking for, please clarify.
如果这不是您所要求的，请澄清。
回答by Md Kamruzzaman Sarker
Checking length
检查长度
length = cust_ref.ToString().Length;
Remove extra bits
删除额外的位
if (length > need)
{
cust_ref =Convert.ToInt32( cust_ref.ToString().Remove(length -(length- need)));
}
回答by Ice Box
for this u will have to do some simple stuffs. like
为此，您将不得不做一些简单的事情。喜欢
cust_ref = Convert.ToInt32(Convert.ToString(cust_ref).Substring(0, 19));
or u can manually store it in any variable and the
或者你可以手动将它存储在任何变量中
回答by Guffa
You don't have to convert it to a string to make it shorter, that can be done numerically:
您不必将其转换为字符串以使其更短，这可以通过数字方式完成：
if (num > 999) {
num %= 1000;
}
This will cut of digits from the left, if you want to cut them off from the right:
如果你想从右边切掉它们，这将从左边切掉数字：
while (num > 999) {
num /= 10;
}
If the value can be negative, also check:
如果该值可以是负数，还要检查：
if (num < -99) {
num = -(-num % 100);
}
or:
或者：
while (num < -99) {
num = -(-num / 10);
}
回答by Viacheslav Smityukh
The conversion to the string is ugly way to implement it.
转换为字符串是实现它的丑陋方式。
It's require a pure math solution
它需要一个纯数学解决方案
int CutTheNumber(int number, int maxLen)
{
var maxSize = (int)Math.Pow(10, maxlen);
if(maxSize <= Math.Abs(number))
{
number %= maxSize;
}
return number;
}
回答by Cliff
The easiest answer would be:
最简单的答案是：
//The length would be 3 chars.
public int myint = 111;
myint.ToString().Length;
回答by Snehal Thakkar
You can try this code. use if else statement to check the validation ..
你可以试试这个代码。使用 if else 语句来检查验证..
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace avaragescore
{
class Program
{
static void Main(string[] args)
{
float quiz;
float midterm;
float final;
float avrg=0;
Start:
Console.WriteLine("Please enter the Quize Score here");
quiz = float.Parse(Console.ReadLine());
if(quiz > 100)
{
Console.WriteLine("You have entered wrong score please re-enter");
goto Start;
}
Start1:
Console.WriteLine("Please enter the Midterm Score here");
midterm = float.Parse(Console.ReadLine());
if(midterm > 100)
{
Console.WriteLine("You have entered wrong score please re- enter");
goto Start1;
}
Start3:
Console.WriteLine("Please enter the Final Score here");
final = float.Parse(Console.ReadLine());
if(final > 100)
{
Console.WriteLine("You have entered wrong Score Please re-enter");
goto Start3;
}
avrg = (quiz + midterm + final) / 3;
if(avrg >= 90)
{
Console.WriteLine("Your Score is {0} , You got A grade",avrg);
}
else if (avrg >= 70 && avrg < 90)
{
Console.WriteLine("Your Score is {0} , You got B grade", avrg);
}
else if (avrg >= 50 && avrg < 70)
{
Console.WriteLine("Your Score is {0} , You got C grade", avrg);
}
else if (avrg < 50)
{
Console.WriteLine("Yor Score is {0} , You are fail", avrg);
}
else
{
Console.WriteLine("You enter invalid Score");
}
Console.ReadLine();
}
}
}
