Question

我想设置一个字符串列表（在示例中可以说是水果）。当点击按钮时，我希望从我设置的列表中选择一个随机水果。

到目前为止，这是我得到的，它只返回列表中水果的单个字母，而不是完整的水果名称。

private void button1_Click(object sender, EventArgs e)
{
    List<string> fruitClass = new List<string>
    {
    "apple",
    "orange",
    "banana"
    };

        Random randomyumyum = new Random(); 
        int randomIndex = randomyumyum.Next(0, 3); 
        string chosenfruit = fruitClass[randomIndex]; 
        Random singlefruit = new Random();
        int randomNumber = singlefruit.Next(fruitClass.Count);
        string chosenString = fruitClass[randomNumber];
        MessageBox.Show(chosenString[randomyumyum.Next(0, 3)].ToString()); 
    }
}

Answer 1

    List<string> randomStrings = new List<string>
    {
        "asdfa",
        "awefawe"
        // to 20 strings
    };

    // Create a new random # class. This can be reused.
    Random random = new Random(); 

    // Get a random number between 0 and 19 (List<string> is 0 based indexed)
    int randomIndex = random.Next(randomStrings.Count); 

    // Get the random string from the list using a random index.
    string randomSelectedString = randomStrings[randomIndex];

使用随机数生成器访问集合的随机索引。以上是一个例子。

如何随机选择已设置的字符串？

1 个答案: