Dictionary<TKey,TValue> 類別
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
表示索引鍵和值的集合。
generic <typename TKey, typename TValue>
public ref class Dictionary : System::Collections::Generic::ICollection<System::Collections::Generic::KeyValuePair<TKey, TValue>>, System::Collections::Generic::IDictionary<TKey, TValue>, System::Collections::Generic::IEnumerable<System::Collections::Generic::KeyValuePair<TKey, TValue>>, System::Collections::Generic::IReadOnlyCollection<System::Collections::Generic::KeyValuePair<TKey, TValue>>, System::Collections::Generic::IReadOnlyDictionary<TKey, TValue>, System::Collections::IDictionarygeneric <typename TKey, typename TValue>
public ref class Dictionary : System::Collections::Generic::ICollection<System::Collections::Generic::KeyValuePair<TKey, TValue>>, System::Collections::Generic::IDictionary<TKey, TValue>, System::Collections::Generic::IEnumerable<System::Collections::Generic::KeyValuePair<TKey, TValue>>, System::Collections::IDictionary, System::Runtime::Serialization::IDeserializationCallback, System::Runtime::Serialization::ISerializablegeneric <typename TKey, typename TValue>
public ref class Dictionary : System::Collections::Generic::ICollection<System::Collections::Generic::KeyValuePair<TKey, TValue>>, System::Collections::Generic::IDictionary<TKey, TValue>, System::Collections::Generic::IEnumerable<System::Collections::Generic::KeyValuePair<TKey, TValue>>, System::Collections::Generic::IReadOnlyCollection<System::Collections::Generic::KeyValuePair<TKey, TValue>>, System::Collections::Generic::IReadOnlyDictionary<TKey, TValue>, System::Collections::IDictionary, System::Runtime::Serialization::IDeserializationCallback, System::Runtime::Serialization::ISerializablepublic class Dictionary<TKey,TValue> : System.Collections.Generic.ICollection<System.Collections.Generic.KeyValuePair<TKey,TValue>>, System.Collections.Generic.IDictionary<TKey,TValue>, System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>, System.Collections.Generic.IReadOnlyCollection<System.Collections.Generic.KeyValuePair<TKey,TValue>>, System.Collections.Generic.IReadOnlyDictionary<TKey,TValue>, System.Collections.IDictionary[System.Runtime.InteropServices.ComVisible(false)]
[System.Serializable]
public class Dictionary<TKey,TValue> : System.Collections.Generic.ICollection<System.Collections.Generic.KeyValuePair<TKey,TValue>>, System.Collections.Generic.IDictionary<TKey,TValue>, System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>, System.Collections.IDictionary, System.Runtime.Serialization.IDeserializationCallback, System.Runtime.Serialization.ISerializable[System.Runtime.InteropServices.ComVisible(false)]
[System.Serializable]
public class Dictionary<TKey,TValue> : System.Collections.Generic.ICollection<System.Collections.Generic.KeyValuePair<TKey,TValue>>, System.Collections.Generic.IDictionary<TKey,TValue>, System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>, System.Collections.Generic.IReadOnlyCollection<System.Collections.Generic.KeyValuePair<TKey,TValue>>, System.Collections.Generic.IReadOnlyDictionary<TKey,TValue>, System.Collections.IDictionary, System.Runtime.Serialization.IDeserializationCallback, System.Runtime.Serialization.ISerializablepublic class Dictionary<TKey,TValue> : System.Collections.Generic.ICollection<System.Collections.Generic.KeyValuePair<TKey,TValue>>, System.Collections.Generic.IDictionary<TKey,TValue>, System.Collections.Generic.IEnumerable<System.Collections.Generic.KeyValuePair<TKey,TValue>>, System.Collections.Generic.IReadOnlyCollection<System.Collections.Generic.KeyValuePair<TKey,TValue>>, System.Collections.Generic.IReadOnlyDictionary<TKey,TValue>, System.Collections.IDictionary, System.Runtime.Serialization.IDeserializationCallback, System.Runtime.Serialization.ISerializabletype Dictionary<'Key, 'Value> = class
interface ICollection<KeyValuePair<'Key, 'Value>>
interface seq<KeyValuePair<'Key, 'Value>>
interface IEnumerable
interface IDictionary<'Key, 'Value>
interface IReadOnlyCollection<KeyValuePair<'Key, 'Value>>
interface IReadOnlyDictionary<'Key, 'Value>
interface ICollection
interface IDictionary[<System.Runtime.InteropServices.ComVisible(false)>]
[<System.Serializable>]
type Dictionary<'Key, 'Value> = class
interface IDictionary<'Key, 'Value>
interface ICollection<KeyValuePair<'Key, 'Value>>
interface seq<KeyValuePair<'Key, 'Value>>
interface IDictionary
interface ICollection
interface IEnumerable
interface ISerializable
interface IDeserializationCallback[<System.Runtime.InteropServices.ComVisible(false)>]
[<System.Serializable>]
type Dictionary<'Key, 'Value> = class
interface IDictionary<'Key, 'Value>
interface ICollection<KeyValuePair<'Key, 'Value>>
interface IDictionary
interface ICollection
interface IReadOnlyDictionary<'Key, 'Value>
interface IReadOnlyCollection<KeyValuePair<'Key, 'Value>>
interface seq<KeyValuePair<'Key, 'Value>>
interface IEnumerable
interface ISerializable
interface IDeserializationCallback[<System.Runtime.InteropServices.ComVisible(false)>]
[<System.Serializable>]
type Dictionary<'Key, 'Value> = class
interface IDictionary<'Key, 'Value>
interface ICollection<KeyValuePair<'Key, 'Value>>
interface seq<KeyValuePair<'Key, 'Value>>
interface IEnumerable
interface IDictionary
interface ICollection
interface IReadOnlyDictionary<'Key, 'Value>
interface IReadOnlyCollection<KeyValuePair<'Key, 'Value>>
interface ISerializable
interface IDeserializationCallbacktype Dictionary<'Key, 'Value> = class
interface IDictionary<'Key, 'Value>
interface ICollection<KeyValuePair<'Key, 'Value>>
interface IReadOnlyDictionary<'Key, 'Value>
interface IReadOnlyCollection<KeyValuePair<'Key, 'Value>>
interface seq<KeyValuePair<'Key, 'Value>>
interface IDictionary
interface ICollection
interface IEnumerabletype Dictionary<'Key, 'Value> = class
interface ICollection<KeyValuePair<'Key, 'Value>>
interface seq<KeyValuePair<'Key, 'Value>>
interface IEnumerable
interface IDictionary<'Key, 'Value>
interface IReadOnlyCollection<KeyValuePair<'Key, 'Value>>
interface IReadOnlyDictionary<'Key, 'Value>
interface ICollection
interface IDictionary
interface IDeserializationCallback
interface ISerializablePublic Class Dictionary(Of TKey, TValue)
Implements ICollection(Of KeyValuePair(Of TKey, TValue)), IDictionary, IDictionary(Of TKey, TValue), IEnumerable(Of KeyValuePair(Of TKey, TValue)), IReadOnlyCollection(Of KeyValuePair(Of TKey, TValue)), IReadOnlyDictionary(Of TKey, TValue)Public Class Dictionary(Of TKey, TValue)
Implements ICollection(Of KeyValuePair(Of TKey, TValue)), IDeserializationCallback, IDictionary, IDictionary(Of TKey, TValue), IEnumerable(Of KeyValuePair(Of TKey, TValue)), ISerializablePublic Class Dictionary(Of TKey, TValue)
Implements ICollection(Of KeyValuePair(Of TKey, TValue)), IDeserializationCallback, IDictionary, IDictionary(Of TKey, TValue), IEnumerable(Of KeyValuePair(Of TKey, TValue)), IReadOnlyCollection(Of KeyValuePair(Of TKey, TValue)), IReadOnlyDictionary(Of TKey, TValue), ISerializable類型參數
- TKey
字典中索引鍵的類型。
- TValue
字典中值的型別。
- 繼承
-
Dictionary<TKey,TValue>
- 衍生
- 屬性
- 實作
-
ICollection<KeyValuePair<TKey,TValue>> IDictionary<TKey,TValue> IEnumerable<KeyValuePair<TKey,TValue>> IEnumerable<T> IReadOnlyCollection<KeyValuePair<TKey,TValue>> IReadOnlyDictionary<TKey,TValue> ICollection IDictionary IEnumerable IDeserializationCallback ISerializable
範例
以下程式碼範例建立一個包含字串鍵的空 Dictionary<TKey,TValue> 字串，並使用此 Add 方法加入一些元素。 範例顯示該Add方法在嘗試新增重複鍵時會拋出 。ArgumentException
範例使用 Item[] 屬性（C# 中的索引器）來取得值，示範當請求的鍵不存在時會拋出 a KeyNotFoundException ，並顯示與鍵相關的值可以被替換。
範例說明了當程式經常必須嘗試字典中不存在的金鑰值時，如何利用此 TryGetValue 方法更有效率地取得值，並說明如何在 ContainsKey 呼叫 Add 方法前測試該鍵是否存在。
範例展示了如何在字典中枚舉鍵與值，以及如何僅使用 Keys 屬性和 Values 屬性枚舉鍵值。
最後，範例展示了該 Remove 方法。
// Create a new dictionary of strings, with string keys.
//
Dictionary<string, string> openWith =
new Dictionary<string, string>();
// Add some elements to the dictionary. There are no
// duplicate keys, but some of the values are duplicates.
openWith.Add("txt", "notepad.exe");
openWith.Add("bmp", "paint.exe");
openWith.Add("dib", "paint.exe");
openWith.Add("rtf", "wordpad.exe");
// The Add method throws an exception if the new key is
// already in the dictionary.
try
{
openWith.Add("txt", "winword.exe");
}
catch (ArgumentException)
{
Console.WriteLine("An element with Key = \"txt\" already exists.");
}
// The Item property is another name for the indexer, so you
// can omit its name when accessing elements.
Console.WriteLine("For key = \"rtf\", value = {0}.",
openWith["rtf"]);
// The indexer can be used to change the value associated
// with a key.
openWith["rtf"] = "winword.exe";
Console.WriteLine("For key = \"rtf\", value = {0}.",
openWith["rtf"]);
// If a key does not exist, setting the indexer for that key
// adds a new key/value pair.
openWith["doc"] = "winword.exe";
// The indexer throws an exception if the requested key is
// not in the dictionary.
try
{
Console.WriteLine("For key = \"tif\", value = {0}.",
openWith["tif"]);
}
catch (KeyNotFoundException)
{
Console.WriteLine("Key = \"tif\" is not found.");
}
// When a program often has to try keys that turn out not to
// be in the dictionary, TryGetValue can be a more efficient
// way to retrieve values.
string value = "";
if (openWith.TryGetValue("tif", out value))
{
Console.WriteLine("For key = \"tif\", value = {0}.", value);
}
else
{
Console.WriteLine("Key = \"tif\" is not found.");
}
// ContainsKey can be used to test keys before inserting
// them.
if (!openWith.ContainsKey("ht"))
{
openWith.Add("ht", "hypertrm.exe");
Console.WriteLine("Value added for key = \"ht\": {0}",
openWith["ht"]);
}
// When you use foreach to enumerate dictionary elements,
// the elements are retrieved as KeyValuePair objects.
Console.WriteLine();
foreach( KeyValuePair<string, string> kvp in openWith )
{
Console.WriteLine("Key = {0}, Value = {1}",
kvp.Key, kvp.Value);
}
// To get the values alone, use the Values property.
Dictionary<string, string>.ValueCollection valueColl =
openWith.Values;
// The elements of the ValueCollection are strongly typed
// with the type that was specified for dictionary values.
Console.WriteLine();
foreach( string s in valueColl )
{
Console.WriteLine("Value = {0}", s);
}
// To get the keys alone, use the Keys property.
Dictionary<string, string>.KeyCollection keyColl =
openWith.Keys;
// The elements of the KeyCollection are strongly typed
// with the type that was specified for dictionary keys.
Console.WriteLine();
foreach( string s in keyColl )
{
Console.WriteLine("Key = {0}", s);
}
// Use the Remove method to remove a key/value pair.
Console.WriteLine("\nRemove(\"doc\")");
openWith.Remove("doc");
if (!openWith.ContainsKey("doc"))
{
Console.WriteLine("Key \"doc\" is not found.");
}
/* This code example produces the following output:
An element with Key = "txt" already exists.
For key = "rtf", value = wordpad.exe.
For key = "rtf", value = winword.exe.
Key = "tif" is not found.
Key = "tif" is not found.
Value added for key = "ht": hypertrm.exe
Key = txt, Value = notepad.exe
Key = bmp, Value = paint.exe
Key = dib, Value = paint.exe
Key = rtf, Value = winword.exe
Key = doc, Value = winword.exe
Key = ht, Value = hypertrm.exe
Value = notepad.exe
Value = paint.exe
Value = paint.exe
Value = winword.exe
Value = winword.exe
Value = hypertrm.exe
Key = txt
Key = bmp
Key = dib
Key = rtf
Key = doc
Key = ht
Remove("doc")
Key "doc" is not found.
*/
// Create a new dictionary of strings, with string keys.
let openWith = Dictionary<string, string>()
// Add some elements to the dictionary. There are no
// duplicate keys, but some of the values are duplicates.
openWith.Add("txt", "notepad.exe")
openWith.Add("bmp", "paint.exe")
openWith.Add("dib", "paint.exe")
openWith.Add("rtf", "wordpad.exe")
// The Add method throws an exception if the new key is
// already in the dictionary.
try
openWith.Add("txt", "winword.exe")
with :? ArgumentException ->
printfn "An element with Key = \"txt\" already exists."
// The Item property is another name for the indexer, so you
// can omit its name when accessing elements.
printfn $"""For key = "rtf", value = {openWith["rtf"]}"""
// The indexer can be used to change the value associated
// with a key.
openWith["rtf"] <- "winword.exe"
printfn $"""For key = "rtf", value = {openWith["rtf"]}"""
// If a key does not exist, setting the indexer for that key
// adds a new key/value pair.
openWith["doc"] <- "winword.exe"
// The indexer throws an exception if the requested key is
// not in the dictionary.
try
printfn $"""For key = "tif", value = {openWith["tif"]}"""
with :? KeyNotFoundException ->
printfn "Key = \"tif\" is not found."
// When a program often has to try keys that turn out not to
// be in the dictionary, TryGetValue can be a more efficient
// way to retrieve values.
match openWith.TryGetValue "tif" with
| true, value -> printfn $"For key = \"tif\", value = {value}."
| _ -> printfn "Key = \"tif\" is not found."
// ContainsKey can be used to test keys before inserting
// them.
if openWith.ContainsKey "ht" |> not then
openWith.Add("ht", "hypertrm.exe")
printfn $"""Value added for key = "ht": {openWith["ht"]}"""
// When you use foreach to enumerate dictionary elements,
// the elements are retrieved as KeyValuePair objects.
printfn ""
for kvp in openWith do
printfn $"Key = {kvp.Key}, Value = {kvp.Value}"
// To get the values alone, use the Values property.
let valueColl = openWith.Values
// The elements of the ValueCollection are strongly typed
// with the type that was specified for dictionary values.
printfn ""
for s in valueColl do
printfn $"Value = {s}"
// To get the keys alone, use the Keys property.
let keyColl = openWith.Keys
// The elements of the KeyCollection are strongly typed
// with the type that was specified for dictionary keys.
printfn ""
for s in keyColl do
printfn $"Key = {s}"
// Use the Remove method to remove a key/value pair.
printfn "\nRemove(\"doc\")"
openWith.Remove "doc" |> ignore
if openWith.ContainsKey "doc" |> not then
printfn "Key \"doc\" is not found."
// This code example produces the following output:
// An element with Key = "txt" already exists.
// For key = "rtf", value = wordpad.exe.
// For key = "rtf", value = winword.exe.
// Key = "tif" is not found.
// Key = "tif" is not found.
// Value added for key = "ht": hypertrm.exe
//
// Key = txt, Value = notepad.exe
// Key = bmp, Value = paint.exe
// Key = dib, Value = paint.exe
// Key = rtf, Value = winword.exe
// Key = doc, Value = winword.exe
// Key = ht, Value = hypertrm.exe
//
// Value = notepad.exe
// Value = paint.exe
// Value = paint.exe
// Value = winword.exe
// Value = winword.exe
// Value = hypertrm.exe
//
// Key = txt
// Key = bmp
// Key = dib
// Key = rtf
// Key = doc
// Key = ht
//
// Remove("doc")
// Key "doc" is not found.
Imports System.Collections.Generic
Public Class Example
Public Shared Sub Main()
' Create a new dictionary of strings, with string keys.
'
Dim openWith As New Dictionary(Of String, String)
' Add some elements to the dictionary. There are no
' duplicate keys, but some of the values are duplicates.
openWith.Add("txt", "notepad.exe")
openWith.Add("bmp", "paint.exe")
openWith.Add("dib", "paint.exe")
openWith.Add("rtf", "wordpad.exe")
' The Add method throws an exception if the new key is
' already in the dictionary.
Try
openWith.Add("txt", "winword.exe")
Catch
Console.WriteLine("An element with Key = ""txt"" already exists.")
End Try
' The Item property is the default property, so you
' can omit its name when accessing elements.
Console.WriteLine("For key = ""rtf"", value = {0}.", _
openWith("rtf"))
' The default Item property can be used to change the value
' associated with a key.
openWith("rtf") = "winword.exe"
Console.WriteLine("For key = ""rtf"", value = {0}.", _
openWith("rtf"))
' If a key does not exist, setting the default Item property
' for that key adds a new key/value pair.
openWith("doc") = "winword.exe"
' The default Item property throws an exception if the requested
' key is not in the dictionary.
Try
Console.WriteLine("For key = ""tif"", value = {0}.", _
openWith("tif"))
Catch
Console.WriteLine("Key = ""tif"" is not found.")
End Try
' When a program often has to try keys that turn out not to
' be in the dictionary, TryGetValue can be a more efficient
' way to retrieve values.
Dim value As String = ""
If openWith.TryGetValue("tif", value) Then
Console.WriteLine("For key = ""tif"", value = {0}.", value)
Else
Console.WriteLine("Key = ""tif"" is not found.")
End If
' ContainsKey can be used to test keys before inserting
' them.
If Not openWith.ContainsKey("ht") Then
openWith.Add("ht", "hypertrm.exe")
Console.WriteLine("Value added for key = ""ht"": {0}", _
openWith("ht"))
End If
' When you use foreach to enumerate dictionary elements,
' the elements are retrieved as KeyValuePair objects.
Console.WriteLine()
For Each kvp As KeyValuePair(Of String, String) In openWith
Console.WriteLine("Key = {0}, Value = {1}", _
kvp.Key, kvp.Value)
Next kvp
' To get the values alone, use the Values property.
Dim valueColl As _
Dictionary(Of String, String).ValueCollection = _
openWith.Values
' The elements of the ValueCollection are strongly typed
' with the type that was specified for dictionary values.
Console.WriteLine()
For Each s As String In valueColl
Console.WriteLine("Value = {0}", s)
Next s
' To get the keys alone, use the Keys property.
Dim keyColl As _
Dictionary(Of String, String).KeyCollection = _
openWith.Keys
' The elements of the KeyCollection are strongly typed
' with the type that was specified for dictionary keys.
Console.WriteLine()
For Each s As String In keyColl
Console.WriteLine("Key = {0}", s)
Next s
' Use the Remove method to remove a key/value pair.
Console.WriteLine(vbLf + "Remove(""doc"")")
openWith.Remove("doc")
If Not openWith.ContainsKey("doc") Then
Console.WriteLine("Key ""doc"" is not found.")
End If
End Sub
End Class
' This code example produces the following output:
'
'An element with Key = "txt" already exists.
'For key = "rtf", value = wordpad.exe.
'For key = "rtf", value = winword.exe.
'Key = "tif" is not found.
'Key = "tif" is not found.
'Value added for key = "ht": hypertrm.exe
'
'Key = txt, Value = notepad.exe
'Key = bmp, Value = paint.exe
'Key = dib, Value = paint.exe
'Key = rtf, Value = winword.exe
'Key = doc, Value = winword.exe
'Key = ht, Value = hypertrm.exe
'
'Value = notepad.exe
'Value = paint.exe
'Value = paint.exe
'Value = winword.exe
'Value = winword.exe
'Value = hypertrm.exe
'
'Key = txt
'Key = bmp
'Key = dib
'Key = rtf
'Key = doc
'Key = ht
'
'Remove("doc")
'Key "doc" is not found.
'
備註
Dictionary<TKey,TValue> generic 類別提供從一組鍵到一組值的映射。 字典中的每筆新增項目都包含一個值及相關的索引鍵。 使用鍵值取得值的速度非常快，接近 O（1），因為類別 Dictionary<TKey,TValue> 實作為雜湊表。
Note
檢索速度取決於所指定的 TKey雜湊演算法品質。
只要物件作為 Dictionary<TKey,TValue>鍵使用，就不得以任何影響雜湊值的方式改變。 根據字典的等號比較器，a Dictionary<TKey,TValue> 中的每個鍵都必須是唯一的。 若鍵型別是參考型態，則鍵值不可能是 ，但值null可以是TValue。
Dictionary<TKey,TValue> 需要一個等式實作來判斷鍵值是否相等。 你可以使用接受IEqualityComparer<T>參數的建構子來指定通用介面的實作comparer;若未指定實作，則使用預設的通用等號比較器EqualityComparer<T>.Default。 若 TKey 型別實 System.IEquatable<T> 作通用介面，預設等式比較器會使用該實作。
Note
例如，你可以使用該類別提供的 StringComparer 大小寫不區分字串比較器，來建立具有大小寫不區分字串鍵的字典。
a Dictionary<TKey,TValue> 的容量是它 Dictionary<TKey,TValue> 能容納的元素數量。 當元素加入 Dictionary<TKey,TValue>時，容量會自動透過重新配置內部陣列而增加。
僅限 .NET Framework ： 對於非常大的 Dictionary<TKey,TValue> 物件，您可以將運行時間環境中 enabled 組態 <gcAllowVeryLargeObjects> 專案的 true 屬性，將 64 位系統上的最大容量增加到 20 億個元素。
為了列舉目的，字典中的每個項目都被視為 KeyValuePair<TKey,TValue> 一個結構，代表一個值及其鍵。 傳回項目的順序未定義。
C# 語言的 foreach 語句 （在 Visual Basic 中For Each） 會傳回集合中專案類型的物件。 由於 是 Dictionary<TKey,TValue> 一組鍵與值，元素類型並非鍵的類型或值的類型。 取而代之的是元素類型為鍵型別的 a KeyValuePair<TKey,TValue> ，值型別為 a。 例如：
foreach( KeyValuePair<string, string> kvp in myDictionary )
{
Console.WriteLine("Key = {0}, Value = {1}", kvp.Key, kvp.Value);
}
for kvp in myDictionary do
printfn $"Key = {kvp.Key}, Value = {kvp.Value}"
For Each kvp As KeyValuePair(Of String, String) In myDictionary
Console.WriteLine("Key = {0}, Value = {1}", kvp.Key, kvp.Value)
Next kvp
這個 foreach 語句是枚舉器的包裝，只允許從集合讀取，不能寫入。
Note
由於金鑰可以繼承且行為會改變，使用該 Equals 方法的比較無法保證其絕對唯一性。
建構函式
屬性
| 名稱 | Description |
|---|---|
| Comparer |
取得 IEqualityComparer<T> 該 ，用來判定字典鍵的相等。 |
| Count |
取得包含在 Dictionary<TKey,TValue>中的鍵/值對數量。 |
| Item[TKey] |
取得或設定與指定鍵相關聯的值。 |
| Keys |
會得到包含 鍵值的 Dictionary<TKey,TValue>集合。 |
| Values |
會得到包含 中 Dictionary<TKey,TValue>值的集合。 |
方法
| 名稱 | Description |
|---|---|
| Add(TKey, TValue) |
將指定的鍵與值加入字典。 |
| Clear() |
移除所有鍵與值。Dictionary<TKey,TValue> |
| ContainsKey(TKey) |
判斷是否 Dictionary<TKey,TValue> 包含指定的金鑰。 |
| ContainsValue(TValue) |
判斷是否 Dictionary<TKey,TValue> 包含特定值。 |
| EnsureCapacity(Int32) |
確保字典最多可以保留一些指定的專案，而不會進一步擴充其備份記憶體。 |
| Equals(Object) |
判斷指定的物件是否等於目前的物件。 (繼承來源 Object) |
| GetEnumerator() |
回傳一個遍歷 的 Dictionary<TKey,TValue>枚舉子。 |
| GetHashCode() |
做為預設哈希函式。 (繼承來源 Object) |
| GetObjectData(SerializationInfo, StreamingContext) |
實作介面 ISerializable 並回傳序列化 Dictionary<TKey,TValue> 實例所需的資料。 |
| GetType() |
取得目前實例的 Type。 (繼承來源 Object) |
| MemberwiseClone() |
建立目前 Object的淺層複本。 (繼承來源 Object) |
| OnDeserialization(Object) |
實 ISerializable 作介面，並在反序列化完成後觸發反序列化事件。 |
| Remove(TKey, TValue) |
從 中移除指定鍵的 Dictionary<TKey,TValue>值，並將元素複製到參數中 |
| Remove(TKey) |
從 中移除指定鍵值 Dictionary<TKey,TValue>的值。 |
| ToString() |
傳回表示目前 物件的字串。 (繼承來源 Object) |
| TrimExcess() |
將此字典的容量設定為原本已使用其所有專案初始化的容量。 |
| TrimExcess(Int32) |
設定此字典的容量，以保留指定的項目數目，而不會進一步擴充其備份記憶體。 |
| TryAdd(TKey, TValue) |
嘗試將指定的索引鍵和值新增至字典。 |
| TryGetValue(TKey, TValue) |
取得與指定索引鍵相關聯的值。 |
明確介面實作
擴充方法
適用於
執行緒安全性
Dictionary<TKey,TValue> A 可以同時支援多個讀取器，只要集合不被修改。 即便如此，透過集合列舉本質上不是安全線程的程式。 在列舉與寫入存取權競爭的罕見情況下，整個列舉期間必須鎖定集合。 若要允許多個線程存取集合以進行讀取和寫入，您必須實作自己的同步處理。
關於執行緒安全的替代方案，請參見類別或ConcurrentDictionary<TKey,TValue>ImmutableDictionary<TKey,TValue>類別。
此類型的公用靜態 （Shared） 成員是安全線程。