本文整理汇总了C#中HashTable.ContainsKey方法的典型用法代码示例。如果您正苦于以下问题：C# HashTable.ContainsKey方法的具体用法？C# HashTable.ContainsKey怎么用？C# HashTable.ContainsKey使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类HashTable的用法示例。
在下文中一共展示了HashTable.ContainsKey方法的15个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Main
static void Main()
{
var grades = new HashTable<string, int>();
Console.WriteLine("Grades:" + string.Join(",", grades));
Console.WriteLine("--------------------");
grades.Add("Peter", 3);
grades.Add("Maria", 6);
grades["George"] = 5;
Console.WriteLine("Grades:" + string.Join(",", grades));
Console.WriteLine("--------------------");
grades.AddOrReplace("Peter", 33);
grades.AddOrReplace("Tanya", 4);
grades["George"] = 55;
Console.WriteLine("Grades:" + string.Join(",", grades));
Console.WriteLine("--------------------");
Console.WriteLine("Keys: " + string.Join(", ", grades.Keys));
Console.WriteLine("Values: " + string.Join(", ", grades.Values));
Console.WriteLine("Count = " + string.Join(", ", grades.Count));
Console.WriteLine("--------------------");
grades.Remove("Peter");
grades.Remove("George");
grades.Remove("George");
Console.WriteLine("Grades:" + string.Join(",", grades));
Console.WriteLine("--------------------");
Console.WriteLine("ContainsKey[\"Tanya\"] = " + grades.ContainsKey("Tanya"));
Console.WriteLine("ContainsKey[\"George\"] = " + grades.ContainsKey("George"));
Console.WriteLine("Grades[\"Tanya\"] = " + grades["Tanya"]);
Console.WriteLine("--------------------");
}示例2: ShouldAlwaysReturnFalseWhenTableIsEmpty
public void ShouldAlwaysReturnFalseWhenTableIsEmpty()
{
var hashtable = new HashTable<int, string>();
Assert.IsFalse(hashtable.ContainsKey(-1));
Assert.IsFalse(hashtable.ContainsKey(0));
Assert.IsFalse(hashtable.ContainsKey(1));
}示例3: Main
internal static void Main()
{
string decorationLine = new string('-', Console.WindowWidth);
Console.Write(decorationLine);
Console.WriteLine("***Presenting the functionality of the data structure 'Hash table'***");
Console.Write(decorationLine);
HashTable<string, int> clubsPoints = new HashTable<string, int>();
Console.WriteLine("---Add operation---");
clubsPoints.Add("Rabbits-O!", 15);
clubsPoints.Add("Frogssy", 19);
clubsPoints.Add("Puma Runners", 17);
clubsPoints.Add("Lion Kings", 33);
Console.WriteLine("Count = " + clubsPoints.Count);
Console.WriteLine();
Console.WriteLine("---Iterator functionality---");
PrintClubsPoints(clubsPoints);
Console.WriteLine();
Console.WriteLine("---Remove operation---");
bool isRemoved = clubsPoints.Remove("Frogssy");
Console.WriteLine("Are 'Frogssy' removed: " + isRemoved);
Console.WriteLine("Count = " + clubsPoints.Count);
Console.WriteLine("Hash table after removal:");
PrintClubsPoints(clubsPoints);
Console.WriteLine();
Console.WriteLine("---Indexer---");
Console.WriteLine("'Lion Kings' points so far: " + clubsPoints["Lion Kings"]);
clubsPoints["Rabbits-O!"] += 3;
Console.WriteLine("'Rabbits-O!' points after a win: " + clubsPoints["Rabbits-O!"]);
Console.WriteLine();
Console.WriteLine("---Find operation---");
Console.WriteLine("Info about 'Puma Runners'" + clubsPoints.Find("Puma Runners"));
Console.WriteLine();
Console.WriteLine("---ContainsKey operation---");
Console.WriteLine("Is there a club 'Birdy'? - " + clubsPoints.ContainsKey("Birdy"));
Console.WriteLine("Is there a club 'Rabbits-O!'? - " + clubsPoints.ContainsKey("Rabbits-O!"));
Console.WriteLine();
Console.WriteLine("---Keys property---");
Console.Write("All clubs names are: ");
Console.WriteLine(string.Join(", ", clubsPoints.Keys));
Console.WriteLine();
Console.WriteLine("---Values property---");
Console.Write("All club's points are: ");
Console.WriteLine(string.Join(", ", clubsPoints.Values));
Console.WriteLine();
Console.WriteLine("---Clear operation---");
clubsPoints.Clear();
Console.WriteLine("Elements count after clearing: " + clubsPoints.Count);
}示例4: ShouldReturnAppropriateResults
public void ShouldReturnAppropriateResults()
{
var hashtable = new HashTable<int, string>();
int numberOfAddedElements = 5;
for (int i = 0; i < numberOfAddedElements; i++)
{
hashtable.Add(i, "test" + i);
}
var expectedTrue = hashtable.ContainsKey(3);
var expectedFalse = hashtable.ContainsKey(-1);
Assert.IsTrue(expectedTrue);
Assert.IsFalse(expectedFalse);
}示例5: Main
static void Main()
{
HashTable<string, string> hashTable = new HashTable<string, string>();
string input = Console.ReadLine();
while (input != "search")
{
string[] parameters = input.Split('-');
string contact = parameters[0];
string number = parameters[1];
hashTable[contact] = number;
input = Console.ReadLine();
}
input = Console.ReadLine();
while (input != "end")
{
if (hashTable.ContainsKey(input))
{
Console.WriteLine("{0} -> {1}", input, hashTable[input]);
}
else
{
Console.WriteLine("Contact {0} does not exist", input);
}
input = Console.ReadLine();
}
}示例6: Main
static void Main()
{
string input = Console.ReadLine();
var phonebook = new HashTable<string, string>();
while (input != "search")
{
string[] record = input.Split( new char[] {'-'}, StringSplitOptions.RemoveEmptyEntries);
phonebook.AddOrReplace(record[0], record[1]);
input = Console.ReadLine();
}
input = Console.ReadLine();
while (input != "")
{
if (phonebook.ContainsKey(input))
{
Console.WriteLine("{0} -> {1}", input, phonebook[input]);
}
else
{
Console.WriteLine("Contact {0} does not exist.", input);
}
input = Console.ReadLine();
}
}示例7: ClearShouldEmptyTheTableAndKeepTheCurrentCapacity
public void ClearShouldEmptyTheTableAndKeepTheCurrentCapacity()
{
var table = new HashTable<string, List<int>>();
for (int i = 0; i < 50; i++)
{
table[i.ToString()] = new List<int>();
for (int j = 0; j < 5; j++)
{
table[i.ToString()].Add(j);
}
Assert.IsTrue(table[i.ToString()].Count > 0);
}
int finalCapacity = table.Capacity;
table.Clear();
Assert.IsTrue(finalCapacity >= 50);
Assert.AreEqual(finalCapacity, table.Capacity);
Assert.AreEqual(0, table.Count);
for (int i = 0; i < 50; i++)
{
Assert.IsFalse(table.ContainsKey(i.ToString()));
}
}示例8: AddingNewKeyPairShouldWorkCorrect
public void AddingNewKeyPairShouldWorkCorrect()
{
var hashTable = new HashTable<string, int>();
hashTable.Add("Ivan", 1);
Assert.IsTrue(hashTable.ContainsKey("Ivan"));
Assert.AreEqual(hashTable["Ivan"], 1);
}示例9: Main
static void Main()
{
var phoneBook = new HashTable<string, string>();
string inputContactInfo = Console.ReadLine();
while (!inputContactInfo.Equals("search"))
{
string[] nameAndPhone = inputContactInfo.Split('-');
string name = nameAndPhone[0];
string phoneNumber = nameAndPhone[1];
if (!phoneBook.ContainsKey(name))
{
phoneBook[name] = phoneNumber;
}
else
{
Console.WriteLine("* The name \"{0}\" already exists in contact list.", name);
}
inputContactInfo = Console.ReadLine();
}
Console.WriteLine();
Console.WriteLine("-- Please, input \"end\" to see the search results --\n");
string inputName = Console.ReadLine();
var names = new List<string>();
while (!inputName.Equals("end"))
{
names.Add(inputName);
inputName = Console.ReadLine();
}
Console.WriteLine();
foreach (var name in names)
{
if (phoneBook.ContainsKey(name))
{
Console.WriteLine("{0} -> {1}", name, phoneBook[name]);
}
else
{
Console.WriteLine("Contact {0} does not exist.", name);
}
}
}示例10: Main
public static void Main()
{
var topCities = new HashTable<string, double>();
// Add(key, value)
topCities.Add("Tokyo", 36.9);
topCities.Add("Jakarta", 12.8);
topCities.Add("Seoul", 25.7);
topCities.Add("Beijing", 23.7);
topCities.Add("Shanghai", 21.7);
// foreach
foreach (var pair in topCities.OrderBy(p => -p.Value))
{
Console.WriteLine("{0, -8} -> {1}", pair.Key, pair.Value);
}
// Add already existing key
try
{
topCities.Add("Jakarta", 0);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
// Keys
Console.WriteLine("Keys: {0}", string.Join(", ", topCities.Keys));
// Count
Console.WriteLine("Number of key-value pairs: {0}", topCities.Count);
// Find(key)
topCities.PrintValue("Tokyo");
Console.WriteLine("Jakarta -> {0}", topCities.Find("Jakarta"));
// this[key]
Console.WriteLine("Beijing -> {0}", topCities["Beijing"]);
// ContainsKey(key)
Console.WriteLine("Hash table contains 'Delhi': {0}", topCities.ContainsKey("Delhi"));
// Remove(key)
topCities.Remove("Seoul");
Console.WriteLine("Remove 'Seoul'");
Console.WriteLine("Keys: {0}", string.Join(", ", topCities.Keys));
Console.WriteLine("Number of key-value pairs: {0}", topCities.Count);
// Remove non-existing
Console.WriteLine("Removing 'Sofia' -> {0}", topCities.Remove("Sofia"));
// Clear
topCities.Clear();
Console.WriteLine("Clear hash table");
Console.WriteLine("Number of key-value pairs: {0}", topCities.Count);
}示例11: Main
static void Main()
{
// Arrange
var hashTable = new HashTable<DateTime, string>();
var date = new DateTime(1995, 7, 18);
hashTable.Add(date, "Some value");
// Act
var containsKey = hashTable.ContainsKey(date);
///////////////////////////////////////////////////
var grades = new HashTable<string, int>();
Console.WriteLine("Grades:" + string.Join(",", grades));
Console.WriteLine("--------------------");
grades.Add("Peter", 3);
grades.Add("Maria", 6);
grades["George"] = 5;
Console.WriteLine("Grades:" + string.Join(",", grades));
Console.WriteLine("--------------------");
grades.AddOrReplace("Peter", 33);
grades.AddOrReplace("Tanya", 4);
grades["George"] = 55;
Console.WriteLine("Grades:" + string.Join(",", grades));
Console.WriteLine("--------------------");
Console.WriteLine("Keys: " + string.Join(", ", grades.Keys));
Console.WriteLine("Values: " + string.Join(", ", grades.Values));
Console.WriteLine("Count = " + string.Join(", ", grades.Count));
Console.WriteLine("--------------------");
grades.Remove("Peter");
grades.Remove("George");
grades.Remove("George");
Console.WriteLine("Grades:" + string.Join(",", grades));
Console.WriteLine("--------------------");
Console.WriteLine("ContainsKey[\"Tanya\"] = " + grades.ContainsKey("Tanya"));
Console.WriteLine("ContainsKey[\"George\"] = " + grades.ContainsKey("George"));
Console.WriteLine("Grades[\"Tanya\"] = " + grades["Tanya"]);
Console.WriteLine("--------------------");
}示例12: ContainsKeyFalseTest
public void ContainsKeyFalseTest()
{
HashTable<string, int> studentMarks = new HashTable<string, int>();
studentMarks.Add("Pesho", 4);
studentMarks.Add("Lili", 6);
studentMarks.Add("Gosho", 3);
bool containsIvanStudent = studentMarks.ContainsKey("Ivan");
Assert.IsFalse(containsIvanStudent);
}示例13: AddingAnItemShouldAddItemAndIncreaseCount
public void AddingAnItemShouldAddItemAndIncreaseCount()
{
var table = new HashTable<double, int>();
Assert.AreEqual(0, table.Count);
for (int i = 1; i < 11; i++)
{
table.Add(i, i);
Assert.AreEqual(i, table.Count);
Assert.IsTrue(table.ContainsKey(i));
}
}示例14: ProcessContactInfo
private static void ProcessContactInfo(string line, HashTable<string, string> contactInfo)
{
var info = line.Split('-').Select(i => i.Trim()).ToList();
if (!contactInfo.ContainsKey(info[0]))
{
contactInfo[info[0]] = info[1];
}
else
{
var message = string.Format("{0} allready exist in the dictionary!", info[0]);
throw new ArgumentException(message);
}
}示例15: Main
internal static void Main()
{
var myLetters = new HashTable<string, int>();
myLetters.Add("a", 1);
myLetters.Add("b", 1);
myLetters.Add("c", 1);
myLetters.Add("d", 1);
myLetters.Add("e", 1);
myLetters.Add("f", 1);
myLetters.Add("g", 1);
myLetters.Add("h", 1);
myLetters.Add("i", 1);
myLetters.Add("j", 1);
myLetters.Add("k", 1);
myLetters.Add("l", 1);
myLetters.Add("m", 1);
myLetters.Add("n", 1);
myLetters.Add("o", 1);
myLetters.Add("p", 1);
myLetters.Add("q", 1);
myLetters.Add("r", 1);
myLetters.Add("s", 1);
Console.WriteLine(string.Join(", ", myLetters));
Console.WriteLine();
myLetters["o"] = 6;
Console.WriteLine("Now we change letter \"{0}\" to {1} times.", "o", myLetters["o"]);
Console.WriteLine(string.Join(", ", myLetters));
Console.WriteLine();
myLetters.Remove("q");
Console.WriteLine("After removal of letter \"q\": {0}", string.Join(", ", myLetters));
Console.WriteLine();
Console.WriteLine("MyLetters contain \"z\"? {0}", myLetters.ContainsKey("z"));
Console.WriteLine("MyLetters contain \"a\"? {0}", myLetters.ContainsKey("a"));
Console.WriteLine();
Console.WriteLine("Keys: {0}", string.Join(", ", myLetters.Keys()));
Console.WriteLine();
myLetters.Clear();
Console.WriteLine("MyLetters after clear: {0}", string.Join(", ", myLetters));
}