如何匹配精確的字符串值或最接近的匹配excel列單元格

Question

我有一個代碼，我輸入IP地址，然后它將循環並搜索該IP的excel列中最接近的匹配。 它只是循環每個IP，如何將參數與IP匹配？

using System;
using System.Net;
using Microsoft.Office.Interop.Excel;
using Excel = Microsoft.Office.Interop.Excel;
using System.Data.OleDb;
using System.Data;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;

namespace Investigations
{
    class Program
    {
        static void Main(string[] args)
        {
            IPAddress addr = IPAddress.Parse("8.8.8.8");
            IPHostEntry entry = Dns.GetHostEntry(addr);
            Console.WriteLine("IP Address: " + addr);
            Console.WriteLine("Host Name: " + entry.HostName);

            Excel.Application xlApp = new Excel.Application();
            Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(@"C:\Users\subnets.xlsx");
            Excel._Worksheet xlWorksheet = xlWorkbook.Sheets[1];
            Excel.Range xlRange = xlWorksheet.UsedRange;                  

            for (int i = 0; i < xlWorksheet.Rows.Count; i++)
            {
                IPAddress excelIP = IPAddress.Parse("8.8.8.8");

                if (IPAddress.TryParse(xlWorksheet.Cells[i + 1, 1].Value.ToString(), out excelIP))
                {                        
                    Console.Write(excelIP.ToString());
                    Console.WriteLine(" -This id was found");                        
                }
            }    
        }

Answer 1

將您找到的那個與您正在搜索的那個進行比較（您也可以將excelIP的聲明移出循環 - 您只需要聲明一次）。 我還創建了一個標志，以防你需要根據在退出循環后是否找到所需的IP來執行某些操作：

bool foundIP = false;
IPAddress excelIP;

for (int i = 0; i < xlWorksheet.Rows.Count; i++)
{
    if (IPAddress.TryParse(xlWorksheet.Cells[i + 1, 1].Value.ToString(), out excelIP))
    {       
        // Compare the IP address we found with the one we're looking for                 
        if (excelIP.Equals(addr))
        {
            foundIP = true;
            break;   // Exit the for loop since we found it
        }                
    }
}  

if (foundIP)
{
    Console.WriteLine("Found the IP address!");
    // If you need to do something with the IP, you can use either excelIP
    // or addr, since they are both the same at this point
}
else
{
    Console.WriteLine("IP address was not found.");
}