C＃從數組

Question

如何從一個數組中刪除任何刪除字符串的字符串和只有整數，而不是

string[] result = col["uncheckedFoods"].Split(','); 

我

[0] = on;  // remove this string 
[1] = 22; 
[2] = 23; 
[3] = off;  // remove this string 
[4] = 24; 

我想

[0] = 22; 
[1] = 23; 
[2] = 24; 

我試圖

var commaSepratedID = string.Join(",", result); 

var data = Regex.Replace(commaSepratedID, "[^,0-9]+", string.Empty); 

但是有一個逗號第一個元素之前，有沒有更好的方法來消除串？

Answer 1

這種選擇可以解析爲int

string[] result = new string[5]; 
result[0] = "on";  // remove this string 
result[1] = "22"; 
result[2] = "23"; 
result[3] = "off";  // remove this string 
result[4] = "24"; 
int temp; 
result = result.Where(x => int.TryParse(x, out temp)).ToArray(); 

Answer 2

的所有字符串也支持double我會做這樣的事情：

public static bool IsNumeric(string input, NumberStyles numberStyle) 
{ 
    double temp; 
    return Double.TryParse(input, numberStyle, CultureInfo.CurrentCulture, out temp); 
} 

然後

string[] result = new string[] {"abc", "10", "4.1" }; 
var res = result.Where(b => IsNumeric(b, NumberStyles.Number)); 
// res contains "10" and "4.1" 

Answer 3

試試這個

dynamic[] result = { "23", "RT", "43", "67", "gf", "43" }; 

       for(int i=1;i<=result.Count();i++) 
       { 
        var getvalue = result[i]; 
        int num; 
        if (int.TryParse(getvalue, out num)) 
        { 
         Console.Write(num); 
         Console.ReadLine(); 
         // It's a number! 
        } 
       }