c# - C# 多次单击按钮时更改标签文本

Question

抱歉，我是新手，只是想知道是否有人可以提供帮助，我试图让我的标签在每次单击按钮时更改其文本。不知道我应该怎么做。谁能帮助我。

private void button1_Click(object sender, EventArgs e)
    {  
        string[] MonthName;
        MonthName = new string[12];

        MonthName[0] = "January";
        MonthName[1] = "February";
        MonthName[2] = "March";
        MonthName[3] = "April";
        MonthName[4] = "May";
        MonthName[5] = "June";
        MonthName[6] = "July";
        MonthName[7] = "August";
        MonthName[8] = "September";
        MonthName[9] = "October";
        MonthName[10] = "November";
        MonthName[11] = "December";


            label1.Text = (MonthName[0]);
            label1.Text = (MonthName[1]);   

Answer 1

这样做可能更容易：

DateTime currentDate = new DateTime(DateTime.Now.Year, 1, 1); // Per Habib's suggestion

private void button1_Click(object sender, EventArgs e) {
    label1.Text = currentDate.ToString("MMMM");
    currentDate = currentDate.AddMonths(1);
}

Answer 2

这应该可以解决问题：

在类中声明数组和一个int

string[] MonthName = { "Jan", "Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec" };
    static int i = 0;

然后在按钮中单击

protected void btnAddMonth_Click(object sender, EventArgs e)
{
    lblMonth.Text = MonthName[i];
    i = (i+1) % 12;
}

Answer 3

1. 将数组初始化移到单击处理程序之外。
2. 有一个隐藏标签，用于存储计数器以确定要选择数组中的哪个元素。

类似于下面的代码。请注意，这不是最优雅的代码，但我想保持简单，因为您说您是新手。

var Months = new List<string>
            {
                   "January",
                   "February",
                   "March",
                   "April",
                   "May",
                   "July",
                   "August",
                   "September",
                   "October",
                   "November",
                   "December"
            };

private void button1_Click(object sender, EventArgs e)
{
        if(string.IsNullOrEmpty(labelHiddenCounter.Text))
            labelHiddenCounter.Text = "0";

        if(labelHiddenCounter.Text == "11")
            labelHiddenCounter.Text = "-1";

        var nextCounter = Convert.ToInt32(labelHiddenCounter.Text) + 1;

        label1.Text = (Months[nextCounter]);

        labelHiddenCounter.Text = nextCounter.ToString();
}

Answer 4

如果您希望在单击按钮时出现随机月份，请使用。

        var random = new Random();
        var months = new List<string>
        {
             "Jan", 
             "Feb", 
             "Mar", 
             "Apr", 
             "May", 
             "Jun", 
             "Jul", 
             "Aug", 
             "Sep", 
             "Oct", 
             "Nov", 
             "Dec"
        };

        int index = random.Next(months.Count);
        label1.Text = (months[index]);