我如何(仅)显示排序列表中的键?
how do i display a key (only)from a sorted list?
我正在尝试确定在每个标签上显示随机键的正确语法。
//declare random
Random rnd = new Random();
//create the sorted list and add items
SortedList<string,string> sl = new SortedList<string,string>();
sl.Add("PicknPay", "jam");
sl.Add("Spar", "bread");
sl.Add("Checkers", "rice");
sl.Add("Shoprite", "potato");
sl.Add("Cambridge", "spinash");
int Count = 0;
int nValue = rnd.Next(5);
int newindex = 0;
int seekindex;
for (seekindex = 0; seekindex > nValue; seekindex++)
{
newindex = rnd.Next(seekindex);
}
lbl1.Text = "";
foreach (var item in sl.Keys)
{
lbl1.Text += "," + Convert.ToString(item.IndexOf(item));
}
lbl1.Text = lbl1.Text.TrimStart(',');
实现此目的的一种方法是通过调用 System.Linq
扩展方法 OrderBy
and passing it the value returned from Random.Next()
获得一个随机排序的键列表,然后从此随机列表中取出前三项:
SortedList<string, string> sl = new SortedList<string, string>
{
{"PicknPay", "jam"},
{"Spar", "bread"},
{"Checkers", "rice"},
{"Shoprite", "potato"},
{"Cambridge", "spinash"}
};
var rnd = new Random();
var shuffledKeys = sl.Keys.OrderBy(key => rnd.Next()).ToList();
lbl1.Text = shuffledKeys[0];
lbl2.Text = shuffledKeys[1];
lbl3.Text = shuffledKeys[2];
我正在尝试确定在每个标签上显示随机键的正确语法。
//declare random
Random rnd = new Random();
//create the sorted list and add items
SortedList<string,string> sl = new SortedList<string,string>();
sl.Add("PicknPay", "jam");
sl.Add("Spar", "bread");
sl.Add("Checkers", "rice");
sl.Add("Shoprite", "potato");
sl.Add("Cambridge", "spinash");
int Count = 0;
int nValue = rnd.Next(5);
int newindex = 0;
int seekindex;
for (seekindex = 0; seekindex > nValue; seekindex++)
{
newindex = rnd.Next(seekindex);
}
lbl1.Text = "";
foreach (var item in sl.Keys)
{
lbl1.Text += "," + Convert.ToString(item.IndexOf(item));
}
lbl1.Text = lbl1.Text.TrimStart(',');
实现此目的的一种方法是通过调用 System.Linq
扩展方法 OrderBy
and passing it the value returned from Random.Next()
获得一个随机排序的键列表,然后从此随机列表中取出前三项:
SortedList<string, string> sl = new SortedList<string, string>
{
{"PicknPay", "jam"},
{"Spar", "bread"},
{"Checkers", "rice"},
{"Shoprite", "potato"},
{"Cambridge", "spinash"}
};
var rnd = new Random();
var shuffledKeys = sl.Keys.OrderBy(key => rnd.Next()).ToList();
lbl1.Text = shuffledKeys[0];
lbl2.Text = shuffledKeys[1];
lbl3.Text = shuffledKeys[2];