哈囉呀 ~ 大家好呀 ~ 今天又要繼續來修練我們 C# 的語法啦 ! 今天來點 C# 中超好用的函數工具喔，一起加油吧 !

字串切割 Split

string s = "i,t,h,o,m,e";
string[] array = s.Split(',');
foreach (var item in array) 
{
    Console.WriteLine(item);
}

i
t
h
o
m
e

字串取代 Replace

string s = "ithome magic";
string r = s.Replace("magic", "魔法");
Console.WriteLine(r);

ithome 魔法

字串擷取 Substring

string s = "ithome";
string sub = s.Substring(3);
Console.WriteLine(sub);

ome

字串尋找 Contains

string s = "ithome";
if (s.Contains("it"))
{
    Console.WriteLine("ithome 裡面包含了 it");
}

ithome 裡面包含了 it

例外狀況處理 try-catch 陳述式

try
{
    string[] array = { "0", "1", "2" };
    Console.WriteLine(array[3]);
}
 catch (IndexOutOfRangeException ex)
{
    Console.WriteLine(ex.ToString());    //把ex印出來
}

System.IndexOutOfRangeException: Index was outside the bounds of the array.

二維正列

int[,] matrix = {
    {1, 2, 3},
    {4, 5, 6},
    {7, 8, 9}
};
for (int i = 0; i < matrix.GetLength(0); i++)
{
    for (int j = 0; j < matrix.GetLength(1); j++)
    {
        Console.Write(matrix[i, j] + " ");
    }
    Console.WriteLine();
}

1 2 3
4 5 6
7 8 9

結尾

太好了 ~ 終於把 C# 常用的一些語法說完了，下一篇就要開始介紹關於 C# 的物件與類別，那今天就到這裡囉 ~ 掰掰啦 ｽﾞｲ₍₍ (ง ˘ω˘ )ว ⁾⁾ ⁽⁽ 〪ɾ( ˘ω˘ 〫ɩ ) ₎₎ｽﾞｲ

參考資料

https://learn.microsoft.com/zh-tw/dotnet/csharp/

https://ithelp.ithome.com.tw/articles/10220898

https://www.youtube.com/watch?v=T9BeejD3i0g