Class LocalizedString

Provides a way to reference a StringTableEntry inside of a specific StringTable and request the localized string.

Inheritance

Object

LocalizedReference

LocalizedString

Inherited Members

LocalizedReference.TableReference

LocalizedReference.TableEntryReference

LocalizedReference.FallbackState

LocalizedReference.LocaleOverride

LocalizedReference.WaitForCompletion

LocalizedReference.IsEmpty

LocalizedReference.SetReference(TableReference, TableEntryReference)

Namespace: UnityEngine.Localization

Syntax

[Serializable]
public class LocalizedString : LocalizedReference, ISerializationCallbackReceiver, IVariableGroup, IDictionary<string, IVariable>, ICollection<KeyValuePair<string, IVariable>>, IEnumerable<KeyValuePair<string, IVariable>>, IEnumerable, IVariableValueChanged, IVariable, IDisposable

Examples

This example shows how to localize a MonoBehaviour so that it updates automatically when the active locale changes. This example uses asynchronous loading to load the localized assets in the background.

public class ExampleMonoBehaviour1 : MonoBehaviour
{
public LocalizedString myLocalizedString = new LocalizedString("My Table", "My Entry");

public string TranslatedValue { get; private set; }

void Start()
{
    // Register to get an update when the string is changed.
    myLocalizedString.StringChanged += ValueChanged;
}

void ValueChanged(string value)
{
    TranslatedValue = value;
    Debug.Log("Value changed to: " + value);
}
}

This example shows how to localize a MonoBehaviour immediately. This example uses synchronous loading, which may cause a pause when first loading the localized assets.

public class ExampleMonoBehaviour2 : MonoBehaviour
{
public LocalizedString myLocalizedString = new LocalizedString("My Table", "My Entry");

public string TranslatedValue => myLocalizedString.GetLocalizedString();

void OnGUI()
{
    GUILayout.Label(TranslatedValue);
}
}

This example shows how to localize a ScriptableObject to represent a quest in a game.

[CreateAssetMenu()]
public class GameQuest : ScriptableObject
{
[SerializeField] LocalizedString questTitle = new LocalizedString("My Quests", "QUEST_1_TITLE");
[SerializeField] LocalizedString questDescription = new LocalizedString("My Quests", "QUEST_1_DESCRIPTION");
[SerializeField] LocalizedString success = new LocalizedString("My Quests", "QUEST_1_SUCCESS");
[SerializeField] LocalizedString failure = new LocalizedString("My Quests", "QUEST_1_FAILURE");

[SerializeField]  float rewardMoney = 100;

public string Title => questTitle.GetLocalizedString();
public string Description => questDescription.GetLocalizedString();
public string Failure => failure.GetLocalizedString();

// Return the success message with the reward money included.
// For example:
// "Congratulations, you saved the village! Please take this reward of {0:C} as a sign of appreciation"
// in English(GB) would become
// "Congratulations, you saved the village! Please take this reward of £100 as a sign of appreciation"
public string Success => success.GetLocalizedString(rewardMoney);
}

This example shows how to use local variables to represent a health counter.

public class HealthCounterExample : MonoBehaviour
{
public Text uiText;
public float delay = 5;

// Some example English strings could be:
// "{player-name} has {player-health} health"
// "{player-name} {player-health:cond:<100?has {} remaing health|is at full health}"
public LocalizedString myLocalizedString = new LocalizedString("My Table", "My Entry")
{
    { "player-name", new StringVariable { Value = "Player 1" } },
    { "player-health", new IntVariable { Value = 100 } }
};

IEnumerator Start()
{
    // Register to get an update when the string is changed.
    // This will be called every time the playerHealth variable is modified.
    myLocalizedString.StringChanged += val => uiText.text = val;

    var playerHealth = myLocalizedString["player-health"] as IntVariable;
    var wait = new WaitForSeconds(delay);

    while (playerHealth.Value > 0)
    {
        yield return wait;

        // Changing the value triggers the LocalizedString to update itself.
        playerHealth.Value -= Random.Range(1, 10);
    }
}
}

Constructors

LocalizedString()

Initializes and returns an empty instance of a LocalizedString.

Declaration

public LocalizedString()

LocalizedString(TableReference, TableEntryReference)

Initializes and returns an instance of a LocalizedString.

Declaration

public LocalizedString(TableReference tableReference, TableEntryReference entryReference)

Parameters

Type	Name	Description
TableReference	tableReference	Reference to the String Table Collection. This can either be the name of the collection as a string or the Collection Guid as a System.Guid.
TableEntryReference	entryReference	Reference to the String Table Collection entry. This can either be the name of the Key as a string or the long Key Id.

Examples

This example shows the different ways to construct a LocalizedString.

public LocalizedString usingNames = new LocalizedString("My String Table", "My Game Text");

public LocalizedString usingTableNameAndEntryId = new LocalizedString("My String Table", 4324324541);

public LocalizedString usingTableGuidAndEntryId = new LocalizedString(new System.Guid("6e79ded14bc9e0a4d9bf2b8aac246bfe"), 323453434);

public LocalizedString usingTableGuidAndEntryName = new LocalizedString(new System.Guid("6e79ded14bc9e0a4d9bf2b8aac246bfe"), "Start Game");

public LocalizedString withLocalVariables = new LocalizedString("My String Table", "My Game Text")
{
    // These variables will be visible in the inspector Local Variables field.
    { "some-text", new StringVariable { Value = "Hello World" } },
    { "score", new IntVariable { Value = 100 } },
    { "player-health", new FloatVariable { Value = 0.5f } },
    { "object-reference", new ObjectVariable()}, // Set via the inspector
};

public LocalizedString withNestedTranslation = new LocalizedString("My String Table", "My Game Text")
{
    { "some-text", new StringVariable { Value = "Hello World" } },
    { "nested", new LocalizedString("My String Table", "My Nested Text")
      {
          { "score", new IntVariable { Value = 100 } },
      }}
};

This example shows how a LocalizedString could be set up in the Editor. By using the Guid and Id the table and entry references will not be lost if the table collection name or entry name was to be changed. Note: The performance benefits to using a Guid and Id are negligible.

public LocalizedString GenerateLocalizedStringInEditor()
{
    // The main advantage to using a table Guid and entry Id is that references will not be lost when changes are made to the Table name or Entry name.
    var collection = LocalizationEditorSettings.GetStringTableCollection("My String Table");
    var entry = collection.SharedData.GetEntry("Start Game");
    return new LocalizedString(collection.SharedData.TableCollectionNameGuid, entry.Id);
}

Properties

Arguments

Arguments that will be passed through to Smart Format. These arguments are not serialized and will need to be set at runtime. See Add(String, IVariable) to add persistent serialized arguments.

Declaration

public IList<object> Arguments { get; set; }

Property Value

Type	Description
IList<Object>

Count

Returns the number of local variables inside this localized string.

Declaration

public int Count { get; }

Property Value

Type	Description
Int32

CurrentLoadingOperationHandle

The current loading operation for the string when using StringChanged or default if one is not available. A string may not be immediately available, such as when loading the StringTable asset, so all string operations are wrapped with an AsyncOperationHandle. See also RefreshString()

Declaration

public AsyncOperationHandle<LocalizedDatabase<StringTable, StringTableEntry>.TableEntryResult> CurrentLoadingOperationHandle { get; }

Property Value

Type	Description
AsyncOperationHandle<LocalizedDatabase.TableEntryResult<>>

HasChangeHandler

Returns true if StringChanged has any subscribers.

Declaration

public bool HasChangeHandler { get; }

Property Value

Type	Description
Boolean

IsReadOnly

Implemented as part of the IDictionary interface but not actually used. Will always return false.

Declaration

public bool IsReadOnly { get; }

Property Value

Type	Description
Boolean

Item[String]

Gets or sets the IVariable with the specified name.

Declaration

public IVariable this[string name] { get; set; }

Parameters

Type	Name	Description
String	name	The name of the variable.

Property Value

Type	Description
IVariable	The found variable.

Examples

This example shows how to get and add a local variable.

    var localizedString = new LocalizedString("My Table", "My Entry");

    // An example of a Smart String using the variable would be: "You have {player-money:C}.".
    // :C will apply the current Locale currency and number formatting.
    localizedString.Add("player-money", new FloatVariable { Value = 100.45f });

    // Get a variable from the localized string
    var variable = localizedString["player-money"] as FloatVariable;
    Debug.Log("The value is " + variable);

Exceptions

Type	Condition
KeyNotFoundException	Thrown if a variable with the specified name does not exist.

Keys

Returns a collection containing all the unique local variable names.

Declaration

public ICollection<string> Keys { get; }

Property Value

Type	Description
ICollection<String>

Values

Returns all the local variables for this localized string.

Declaration

public ICollection<IVariable> Values { get; }

Property Value

Type	Description
ICollection<IVariable>

Methods

Add(KeyValuePair<String, IVariable>)

Declaration

public void Add(KeyValuePair<string, IVariable> item)

Parameters

Type	Name	Description
KeyValuePair<String, IVariable>	item	The local variable name and value to add.

Add(String, IVariable)

Adds a new Local Variable to use during formatting.

Declaration

public void Add(string name, IVariable variable)

Parameters

Type	Name	Description
String	name	The name of the variable, must be unique. Note the name should not contain any whitespace, if any is found then it will be replaced with with '-'.
IVariable	variable	The variable to use when formatting. See also BoolVariable, FloatVariable, IntVariable, StringVariable, ObjectVariable.

Examples

This example shows how to get and add a local variable.

    var localizedString = new LocalizedString("My Table", "My Entry");

    // An example of a Smart String using the variable would be: "You have {player-money:C}.".
    // :C will apply the current Locale currency and number formatting.
    localizedString.Add("player-money", new FloatVariable { Value = 100.45f });

    // Get a variable from the localized string
    var variable = localizedString["player-money"] as FloatVariable;
    Debug.Log("The value is " + variable);

Exceptions

Type	Condition
ArgumentException	Thrown when name is null or empty.
ArgumentNullException	Thrown when variable is null.

Clear()

Removes all local variables.

Declaration

public void Clear()

Contains(KeyValuePair<String, IVariable>)

Declaration

public bool Contains(KeyValuePair<string, IVariable> item)

Parameters

Type	Name	Description
KeyValuePair<String, IVariable>	item	The item to check for. Both the Key and Value must match.

Returns

Type	Description
Boolean	true if a matching variable could be found or false if one could not.

ContainsKey(String)

Returns true if a local variable with the specified name exists.

Declaration

public bool ContainsKey(string name)

Parameters

Type	Name	Description
String	name	The variable name to check for.

Returns

Type	Description
Boolean	true if a matching variable could be found or false if one could not.

CopyTo(KeyValuePair<String, IVariable>[], Int32)

Copies the local variables into an array starting at arrayIndex.

Declaration

public void CopyTo(KeyValuePair<string, IVariable>[] array, int arrayIndex)

Parameters

Type	Name	Description
KeyValuePair<String, IVariable>[]	array	The array to copy the local variables into.
Int32	arrayIndex	The index to start copying the items into.

Exceptions

Type	Condition
ArgumentNullException	Thrown when the array is null.

ForceUpdate()

Declaration

protected override void ForceUpdate()

Overrides

LocalizedReference.ForceUpdate()

GetEnumerator()

Returns an enumerator for all local variables in this localized string.

Declaration

public IEnumerator GetEnumerator()

Returns

Type	Description
IEnumerator	The enumerator that can be used to iterate through all the local variables.

GetLocalizedString()

Provides a translated string from a StringTable with the TableReference and the translated string that matches TableEntryReference. Uses WaitForCompletion to force the loading to complete synchronously. Please note that WaitForCompletion is not supported on WebGL.

Declaration

public string GetLocalizedString()

Returns

Type	Description
String	The localized string for the SelectedLocale or LocaleOverride if it is not null.

GetLocalizedString(IList<Object>)

Provides a translated string from a StringTable with the TableReference and the translated string that matches TableEntryReference.

Declaration

public string GetLocalizedString(IList<object> arguments)

Parameters

Type	Name	Description
IList<Object>	arguments	The arguments to pass into the Smart String formatter or String.Format.

Returns

Type	Description
String	The localized string for the SelectedLocale or LocaleOverride if it is not null.

GetLocalizedString(Object[])

Provides a translated string from a StringTable with the TableReference and the translated string that matches TableEntryReference. Uses WaitForCompletion to force the loading to complete synchronously. Please note that WaitForCompletion is not supported on WebGL.

Declaration

public string GetLocalizedString(params object[] arguments)

Parameters

Type	Name	Description
Object[]	arguments	The arguments to pass into the Smart String formatter or String.Format.

Returns

Type	Description
String	The localized string for the SelectedLocale or LocaleOverride if it is not null.

GetLocalizedStringAsync()

Provides a translated string from a StringTable with the TableReference and the translated string that matches TableEntryReference.

Declaration

public AsyncOperationHandle<string> GetLocalizedStringAsync()

Returns

Type	Description
AsyncOperationHandle<String>	Returns the loading operation for the request.

Remarks

The Completed event provides a notification once the operation has finished and the string has been found or an error has occurred. A string table may have already been loaded during a previous operation or when using Preload mode. Check the IsDone property to see if the string table has already been loaded and the translated string is immediately available. See Async operation handling for further details. To force the operation to complete immediately, call WaitForCompletion().

Examples

This example shows how GetLocalizedStringAsync() can be used to request an updated string when the SelectedLocale changes.

public class LocalizedStringGetExample : MonoBehaviour
{
public Text myText;

public LocalizedString myString = new LocalizedString
{
    TableReference = "My String Table",
    TableEntryReference = "My Game Text"
};

void OnEnable()
{
    LocalizationSettings.SelectedLocaleChanged += LocaleChanged;
    LoadString();
}

void OnDisable()
{
    LocalizationSettings.SelectedLocaleChanged -= LocaleChanged;
}

void LocaleChanged(Locale locale)
{
    LoadString();
}

void LoadString()
{
    var operation = myString.GetLocalizedStringAsync();
    UpdateString(operation);
}

void UpdateString(AsyncOperationHandle<string> value)
{
    if (!value.IsDone)
    {
        // Defer the callback until the operation is finished
        value.Completed += UpdateString;
        return;
    }

    myText.text = value.Result;
}
}

This example shows how GetLocalizedStringAsync() can be forced to complete immediately using WaitForCompletion().

public class LocalizedStringSynchronousGetExample : MonoBehaviour
{
public Text myText;

public LocalizedString myString = new LocalizedString
{
    TableReference = "My String Table",
    TableEntryReference = "My Game Text"
};

void OnEnable()
{
    LocalizationSettings.SelectedLocaleChanged += LocaleChanged;
    LoadString();
}

void OnDisable()
{
    LocalizationSettings.SelectedLocaleChanged -= LocaleChanged;
}

void LocaleChanged(Locale locale)
{
    LoadString();
}

void LoadString()
{
    var operation = myString.GetLocalizedStringAsync();
    operation.WaitForCompletion(); // Force synchronous loading
    myText.text = operation.Result;
}
}

GetLocalizedStringAsync(IList<Object>)

Provides a translated string from a StringTable with the TableReference and the translated string that matches TableEntryReference.

Declaration

public AsyncOperationHandle<string> GetLocalizedStringAsync(IList<object> arguments)

Parameters

Type	Name	Description
IList<Object>	arguments	The arguments to pass into the Smart String formatter or String.Format.

Returns

Type	Description
AsyncOperationHandle<String>	Returns the loading operation for the request.

GetLocalizedStringAsync(Object[])

Provides a translated string from a StringTable with the TableReference and the translated string that matches TableEntryReference.

Declaration

public AsyncOperationHandle<string> GetLocalizedStringAsync(params object[] arguments)

Parameters

Type	Name	Description
Object[]	arguments	The arguments to pass into the Smart String formatter or String.Format.

Returns

Type	Description
AsyncOperationHandle<String>	Returns the loading operation for the request.

GetSourceValue(ISelectorInfo)

The value that will be used when the smart string matches this variable. This value can then be further used by additional sources/formatters.

Declaration

public object GetSourceValue(ISelectorInfo selector)

Parameters

Type	Name	Description
ISelectorInfo	selector	The details about the current format operation.

Returns

Type	Description
Object

Implements

IVariable.GetSourceValue(ISelectorInfo)

RefreshString()

Provides a way to force a refresh of the string when using StringChanged.

Declaration

public bool RefreshString()

Returns

Type	Description
Boolean	Returns true if a new refresh could be requested or false if it could not, such as when CurrentLoadingOperationHandle is still loading.

Remarks

This will only force the refresh if there is currently no active CurrentLoadingOperationHandle, if one is still being executed then it will be ignored and false will be returned. If a string is not static and will change during game play, such as when using format arguments, then this can be used to force the string to update itself.

You may wish to call this if the values inside of the Arguments list have changed or you wish to force all StringChanged subscribers to update.

Examples

This example shows how the string can be refreshed, such as when showing dynamic values like the current time.

/// <summary>
/// This example expects a Smart String with a named placeholder of `TimeNow`, such as "The time now is {TimeNow}".
/// </summary>
public class LocalizedStringSmart : MonoBehaviour
{
public LocalizedString myString;

string localizedText;

public float TimeNow => Time.time;

/// <summary>
/// Register a ChangeHandler. This is called whenever we need to update our string.
/// </summary>
void OnEnable()
{
    myString.Arguments = new[] { this };
    myString.StringChanged += UpdateString;
}

void OnDisable()
{
    myString.StringChanged -= UpdateString;
}

void UpdateString(string s)
{
    localizedText = s;
}

void OnGUI()
{
    // This calls UpdateString immediately (if the table is loaded) or when the table is available.
    myString.RefreshString();
    GUILayout.Label(localizedText);
}
}

Remove(KeyValuePair<String, IVariable>)

Removes a local variable with the specified key.

Declaration

public bool Remove(KeyValuePair<string, IVariable> item)

Parameters

Type	Name	Description
KeyValuePair<String, IVariable>	item	The item to be removed, only the Key field will be considered.

Returns

Type	Description
Boolean	true if a variable with the specified name was removed, false if one was not.

Remove(String)

Removes a local variable with the specified name.

Declaration

public bool Remove(string name)

Parameters

Type	Name	Description
String	name	The name of the variable to be removed.

Returns

Type	Description
Boolean	true if a variable with the specified name was removed, false if one was not.

Examples

This example shows how to remove a local variable.

    const string variableName = "my-variable";

    localizedString.Add(variableName, new FloatVariable { Value = 100.45f });
    Debug.LogFormat("Contains variable before remove: {0}", localizedString.ContainsKey(variableName));

    localizedString.Remove(variableName);
    Debug.LogFormat("Contains variable after remove: {0}", localizedString.ContainsKey(variableName));

Reset()

Clears the current loading operation.

Declaration

protected override void Reset()

Overrides

LocalizedReference.Reset()

TryGetValue(String, out IVariable)

Gets the IVariable with the specified name.

Declaration

public bool TryGetValue(string name, out IVariable value)

Parameters

Type	Name	Description
String	name	The name of the variable.
IVariable	value	The variable that was found or default.

Returns

Type	Description
Boolean	true if a variable was found and false if one could not.

Implements

IVariableGroup.TryGetValue(String, out IVariable)

Examples

This example shows how to get and add a local variable using TryGetValue.

    FloatVariable playerScore = null;
    if (!localizedString.TryGetValue("player-score", out var variable))
    {
        playerScore = new FloatVariable();
        localizedString.Add("player-score", playerScore);
    }
    else
    {
        playerScore = variable as FloatVariable;
    }

    playerScore.Value += 10;

Events

StringChanged

Provides a callback that will be invoked when the translated string has changed. The following events will trigger an update:

• The first time the action is added to the event.
• The SelectedLocale changing.
• If the string is currently using a IVariable which supports IVariableValueChanged and it's value has changed.
• When RefreshString() is called.
• The TableReference or TableEntryReference changing.

When the first LocalizedString.ChangeHandler is added, a loading operation (see CurrentLoadingOperationHandle) automatically starts. When the loading operation is completed, the localized string value is sent to the subscriber. If you add additional subscribers after loading has completed, they are also sent the latest localized string value. This ensures that a subscriber will always have the correct localized value regardless of when it was added.

Declaration

public event LocalizedString.ChangeHandler StringChanged

Event Type

Type	Description
LocalizedString.ChangeHandler

Examples

This example shows how the StringChanged event can be used to trigger updates to a string.

public class LocalizedStringWithEvents : MonoBehaviour
{
public LocalizedString myString;

string localizedText;

/// <summary>
/// Register a ChangeHandler. This is called whenever the string needs to be updated.
/// </summary>
void OnEnable()
{
    myString.StringChanged += UpdateString;
}

void OnDisable()
{
    myString.StringChanged -= UpdateString;
}

void UpdateString(string s)
{
    localizedText = s;
}

void OnGUI()
{
    EditorGUILayout.LabelField(localizedText);
}
}

ValueChanged

This event is sent when the global variable has changed or wishes to trigger an update to any LocalizedString that is currently using it.

Declaration

public event Action<IVariable> ValueChanged

Event Type

Type	Description
Action<IVariable>

Implements

IVariableValueChanged.ValueChanged