Class CfnParameter

Namespace

Amazon.CDK

Assembly

Amazon.CDK.dll

A CloudFormation parameter.

public class CfnParameter : CfnElement, IConstruct, IConstruct, IDependable

Inheritance

object

Construct

CfnElement

CfnParameter

Implements

IConstruct

IConstruct

IDependable

Inherited Members

CfnElement.IsCfnElement(object)

CfnElement.OverrideLogicalId(string)

CfnElement.CreationStack

CfnElement.LogicalId

CfnElement.Stack

Construct.IsConstruct(object)

Construct.OnPrepare()

Construct.OnSynthesize(ISynthesisSession)

Construct.OnValidate()

Construct.Prepare()

Construct.Synthesize(ISynthesisSession)

Construct.Validate()

Construct.Node

Examples

var myTopic = new Topic(this, "MyTopic");
             var url = new CfnParameter(this, "url-param");

             myTopic.AddSubscription(new UrlSubscription(url.ValueAsString));

Remarks

Use the optional Parameters section to customize your templates. Parameters enable you to input custom values to your template each time you create or update a stack.

ExampleMetadata: infused

Constructors

CfnParameter(Construct, string, ICfnParameterProps?)

Creates a parameter construct.

public CfnParameter(Construct scope, string id, ICfnParameterProps? props = null)

Parameters

scope Construct

The parent construct.

id string

props ICfnParameterProps

The parameter properties.

Remarks

Note that the name (logical ID) of the parameter will derive from it's coname and location within the stack. Therefore, it is recommended that parameters are defined at the stack level.

Properties

AllowedPattern

A regular expression that represents the patterns to allow for String types.

public virtual string? AllowedPattern { get; set; }

Property Value

string

Remarks

Default: - No constraints on patterns allowed for parameter.

AllowedValues

An array containing the list of values allowed for the parameter.

public virtual string[]? AllowedValues { get; set; }

Property Value

string[]

Remarks

Default: - No constraints on values allowed for parameter.

ConstraintDescription

A string that explains a constraint when the constraint is violated.

public virtual string? ConstraintDescription { get; set; }

Property Value

string

Remarks

For example, without a constraint description, a parameter that has an allowed pattern of [A-Za-z0-9]+ displays the following error message when the user specifies an invalid value:

Default: - No description with customized error message when user specifies invalid values.

Default

A value of the appropriate type for the template to use if no value is specified when a stack is created.

public virtual object Default { get; set; }

Property Value

object

Remarks

If you define constraints for the parameter, you must specify a value that adheres to those constraints.

Default: - No default value for parameter.

Description

A string of up to 4000 characters that describes the parameter.

public virtual string? Description { get; set; }

Property Value

string

Remarks

Default: - No description for the parameter.

MaxLength

An integer value that determines the largest number of characters you want to allow for String types.

public virtual double? MaxLength { get; set; }

Property Value

double?

Remarks

Default: - None.

MaxValue

A numeric value that determines the largest numeric value you want to allow for Number types.

public virtual double? MaxValue { get; set; }

Property Value

double?

Remarks

Default: - None.

MinLength

An integer value that determines the smallest number of characters you want to allow for String types.

public virtual double? MinLength { get; set; }

Property Value

double?

Remarks

Default: - None.

MinValue

A numeric value that determines the smallest numeric value you want to allow for Number types.

public virtual double? MinValue { get; set; }

Property Value

double?

Remarks

Default: - None.

NoEcho

Indicates if this parameter is configured with "NoEcho" enabled.

public virtual bool NoEcho { get; set; }

Property Value

bool

Type

The data type for the parameter (DataType).

public virtual string Type { get; set; }

Property Value

string

Remarks

Default: String

Value

The parameter value as a Token.

public virtual IResolvable Value { get; }

Property Value

IResolvable

ValueAsList

The parameter value, if it represents a string list.

public virtual string[] ValueAsList { get; }

Property Value

string[]

ValueAsNumber

The parameter value, if it represents a number.

public virtual double ValueAsNumber { get; }

Property Value

double

ValueAsString

The parameter value, if it represents a string.

public virtual string ValueAsString { get; }

Property Value

string

Methods

Resolve(IResolveContext)

public virtual object Resolve(IResolveContext context)

Parameters

context IResolveContext

Returns

object