62,072
社区成员
发帖
与我相关
我的任务
分享大神们， 谁会的教教我~
var pid = Repository<Product>.Where(s => s.Name == first.ProductName).FirstOrDefault().Id;
为了提高性能。需要一开始就把所有数据取出来，然后放入字典中。 怎么写呢？
为了提高性能。需要一开始就把所有数据取出来，然后放入字典中。 怎么写呢？
...全文
请发表友善的回复…
发表回复
桥头哥哥 2014-03-18
- 打赏
- 举报
static void Main(string[] args)
{
Dictionary<int, string> dic = new Dictionary<int, string>();
dic[1] = "a";
dic[2] = "b";
dic[3] = "c";
for (int i = 1; i < 4; i++)
{
Console.WriteLine(dic[i]);
}
Console.ReadKey();
}
桥头哥哥 2014-03-18
- 打赏
- 举报
SortedDictionary<string, string> openWith =
new SortedDictionary<string, string>();
// Add some elements to the dictionary.
openWith.Add("txt", "notepad.exe");
openWith.Add("bmp", "paint.exe");
openWith.Add("dib", "paint.exe");
openWith.Add("rtf", "wordpad.exe");
// Create a Dictionary of strings with string keys, and
// initialize it with the contents of the sorted dictionary.
Dictionary<string, string> copy =
new Dictionary<string, string>(openWith);
// List the contents of the copy.
Console.WriteLine();
foreach( KeyValuePair<string, string> kvp in copy )
{
Console.WriteLine("Key = {0}, Value = {1}",
kvp.Key, kvp.Value);
}
