我正在为我的编程和问题解决课程开发一个项目，这个特定的程序假设从文本文件（记事本）中读取人口普查数据，然后显示每个年龄组的居民人数以及数量每个地区的居民。
来自作业：
每条记录中的字段将以逗号分隔。
例如： 21，M，S，1
＆＃34;该市有22个区。人口普查部门希望查看每个地区有多少居民的清单，以及以下每个年龄组（所有地区合并）的居民数量：18岁以下，18岁至30岁，31岁至45岁，46岁以下64岁，65岁或以上。＆＃34;
我有一个文本文件要测试，但是一切似乎都有效，如果我使用的是字符而不是数字（例如＆＃34; a＆＃34;或＆＃34; B＆＃34;）它会破坏我的程序。如果数据不是数字，我怎么能告诉程序跳过数据，或者我猜测＆＃34; int＆＃34;值？我假设某种try.Parse，但是我只看过它通过控制台输入演示，而不是来自数组......
我的代码如下。谢谢您的帮助。我感谢所有的批评和建议。
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
namespace Project2
{
class Program
{
static void Main(string[] args)
{
int[] ageData = new int[900];
int[] districtDataA = new int[900];
int[] ageGroup = new int[5];
int[] districtCount = new int[22];
int i = 0;
foreach (string line in File.ReadAllLines("test.txt"))
{
string[] fields = line.Split(',');
ageData[i] = int.Parse(fields[0]);
districtDataA[i] = int.Parse(fields[3]);
if (ageData[i] > 0 && ageData[i] <= 18)
{
ageGroup[0] = ageGroup[0] + 1;
}
if (ageData[i] > 18 && ageData[i] <= 30)
{
ageGroup[1] = ageGroup[1] + 1;
}
if (ageData[i] > 30 && ageData[i] <= 45)
{
ageGroup[2] = ageGroup[2] + 1;
}
if (ageData[i] > 45 && ageData[i] <= 64)
{
ageGroup[3] = ageGroup[3] + 1;
}
if (ageData[i] >= 65)
{
ageGroup[4] = ageGroup[4] + 1;
}
//District Count info
if (districtDataA[i] == 1)
{
districtCount[0] = districtCount[0] + 1;
}
if (districtDataA[i] == 2)
{
districtCount[1] = districtCount[1] + 1;
}
if (districtDataA[i] == 3)
{
districtCount[2] = districtCount[2] + 1;
}
if (districtDataA[i] == 4)
{
districtCount[3] = districtCount[3] + 1;
}
if (districtDataA[i] == 5)
{
districtCount[4] = districtCount[4] + 1;
}
if (districtDataA[i] == 6)
{
districtCount[5] = districtCount[5] + 1;
}
if (districtDataA[i] == 7)
{
districtCount[6] = districtCount[6] + 1;
}
if (districtDataA[i] == 8)
{
districtCount[7] = districtCount[7] + 1;
}
if (districtDataA[i] == 9)
{
districtCount[8] = districtCount[8] + 1;
}
if (districtDataA[i] == 10)
{
districtCount[9] = districtCount[9] + 1;
}
if (districtDataA[i] == 11)
{
districtCount[10] = districtCount[10] + 1;
}
if (districtDataA[i] == 12)
{
districtCount[11] = districtCount[11] + 1;
}
if (districtDataA[i] == 13)
{
districtCount[12] = districtCount[12] + 1;
}
if (districtDataA[i] == 14)
{
districtCount[13] = districtCount[13] + 1;
}
if (districtDataA[i] == 15)
{
districtCount[14] = districtCount[14] + 1;
}
if (districtDataA[i] == 16)
{
districtCount[15] = districtCount[15] + 1;
}
if (districtDataA[i] == 17)
{
districtCount[16] = districtCount[16] + 1;
}
if (districtDataA[i] == 18)
{
districtCount[17] = districtCount[17] + 1;
}
if (districtDataA[i] == 19)
{
districtCount[18] = districtCount[18] + 1;
}
if (districtDataA[i] == 20)
{
districtCount[19] = districtCount[19] + 1;
}
if (districtDataA[i] == 21)
{
districtCount[20] = districtCount[20] + 1;
}
if (districtDataA[i] == 22)
{
districtCount[21] = districtCount[21] + 1;
}
i++;
}//End For
Console.WriteLine("This program provides a list of residents in 5 age groups,");
Console.WriteLine("And a list of residents in each district 1-22");
Console.WriteLine("(1.)----------------AGE-GROUP-Count----------------");
Console.WriteLine("Age Group 18 & under = {0}", ageGroup[0]);
Console.WriteLine("Age Group 18-30 = {0}", ageGroup[1]);
Console.WriteLine("Age Group 31-45 = {0}", ageGroup[2]);
Console.WriteLine("Age Group 46-64 = {0}", ageGroup[3]);
Console.WriteLine("Age Group 65 & over = {0}", ageGroup[4]);
Console.WriteLine("(2.)--------------COUNT-PER-DISRTRICT--------------");
Console.WriteLine("District 1 = {0}", districtCount[0]);
Console.WriteLine("District 2 = {0}", districtCount[1]);
Console.WriteLine("District 3 = {0}", districtCount[2]);
Console.WriteLine("District 4 = {0}", districtCount[3]);
Console.WriteLine("District 5 = {0}", districtCount[4]);
Console.WriteLine("District 6 = {0}", districtCount[5]);
Console.WriteLine("District 7 = {0}", districtCount[6]);
Console.WriteLine("District 8 = {0}", districtCount[7]);
Console.WriteLine("District 9 = {0}", districtCount[8]);
Console.WriteLine("District 10 = {0}", districtCount[9]);
Console.WriteLine("District 11 = {0}", districtCount[10]);
Console.WriteLine("District 12 = {0}", districtCount[11]);
Console.WriteLine("District 13 = {0}", districtCount[12]);
Console.WriteLine("District 14 = {0}", districtCount[13]);
Console.WriteLine("District 15 = {0}", districtCount[14]);
Console.WriteLine("District 16 = {0}", districtCount[15]);
Console.WriteLine("District 17 = {0}", districtCount[16]);
Console.WriteLine("District 18 = {0}", districtCount[17]);
Console.WriteLine("District 19 = {0}", districtCount[18]);
Console.WriteLine("District 20 = {0}", districtCount[19]);
Console.WriteLine("District 21 = {0}", districtCount[20]);
Console.WriteLine("District 22 = {0}", districtCount[21]);
}
}
}
答案 0 :(得分：0)
试试这个：
double n;
foreach (string line in File.ReadAllLines("test.txt"))
{
string[] fields = line.Split(',');
bool ageIsNumeric = double.TryParse(fields[0], out n);
bool districtIsNumeric = double.TryParse(fields[3], out n);
if(!ageIsNumeric || !districtIsNumeric)
continue;
ageData[i] = int.Parse(fields[0]);
districtDataA[i] = int.Parse(fields[3]);
答案 1 :(得分：0)
您从txt文件中读取数据作为字符串 在try catch块
中的foreach语句中插入代码 foreach()
{
try{
//your code here
}catch(Exception){}
}