Class ValidationExtensions

Extension methods for adding validation rules to options and arguments.

Inheritance

System.Object

ValidationExtensions

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: McMaster.Extensions.CommandLineUtils

Assembly: McMaster.Extensions.CommandLineUtils.dll

Syntax

public static class ValidationExtensions

Methods

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Accepts(CommandArgument)

Creates a builder for specifying a set of rules used to determine if input is valid.

Declaration

public static IArgumentValidationBuilder Accepts(this CommandArgument argument)

Parameters

Type	Name	Description
CommandArgument	argument	The argument.

Returns

Type	Description
IArgumentValidationBuilder	The builder.

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Accepts(CommandArgument, Action<IArgumentValidationBuilder>)

Specifies a set of rules used to determine if input is valid.

Declaration

public static CommandArgument Accepts(this CommandArgument argument, Action<IArgumentValidationBuilder> configure)

Parameters

Type	Name	Description
CommandArgument	argument	The argument.
System.Action<IArgumentValidationBuilder>	configure	A function to configure rules on the validation builder.

Returns

Type	Description
CommandArgument	The argument.

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Accepts(CommandOption)

Creates a builder for specifying a set of rules used to determine if input is valid.

Declaration

public static IOptionValidationBuilder Accepts(this CommandOption option)

Parameters

Type	Name	Description
CommandOption	option	The option.

Returns

Type	Description
IOptionValidationBuilder	The builder.

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Accepts(CommandOption, Action<IOptionValidationBuilder>)

Specifies a set of rules used to determine if input is valid.

Declaration

public static CommandOption Accepts(this CommandOption option, Action<IOptionValidationBuilder> configure)

Parameters

Type	Name	Description
CommandOption	option	The option.
System.Action<IOptionValidationBuilder>	configure	A function to configure rules on the validation builder.

Returns

Type	Description
CommandOption	The option.

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Accepts<T>(CommandArgument<T>)

Creates a builder for specifying a set of rules used to determine if input is valid.

Declaration

public static IArgumentValidationBuilder<T> Accepts<T>(this CommandArgument<T> argument)

Parameters

Type	Name	Description
CommandArgument<T>	argument	The argument.

Returns

Type	Description
IArgumentValidationBuilder<T>	The builder.

Type Parameters

Name	Description
T

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Accepts<T>(CommandArgument<T>, Action<IArgumentValidationBuilder<T>>)

Specifies a set of rules used to determine if input is valid.

Declaration

public static CommandArgument<T> Accepts<T>(this CommandArgument<T> argument, Action<IArgumentValidationBuilder<T>> configure)

Parameters

Type	Name	Description
CommandArgument<T>	argument	The argument.
System.Action<IArgumentValidationBuilder<T>>	configure	A function to configure rules on the validation builder.

Returns

Type	Description
CommandArgument<T>	The argument.

Type Parameters

Name	Description
T

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Accepts<T>(CommandOption<T>)

Creates a builder for specifying a set of rules used to determine if input is valid.

Declaration

public static IOptionValidationBuilder<T> Accepts<T>(this CommandOption<T> option)

Parameters

Type	Name	Description
CommandOption<T>	option	The option.

Returns

Type	Description
IOptionValidationBuilder<T>	The builder.

Type Parameters

Name	Description
T

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Accepts<T>(CommandOption<T>, Action<IOptionValidationBuilder<T>>)

Specifies a set of rules used to determine if input is valid.

Declaration

public static CommandOption<T> Accepts<T>(this CommandOption<T> option, Action<IOptionValidationBuilder<T>> configure)

Parameters

Type	Name	Description
CommandOption<T>	option	The option.
System.Action<IOptionValidationBuilder<T>>	configure	A function to configure rules on the validation builder.

Returns

Type	Description
CommandOption<T>	The option.

Type Parameters

Name	Description
T

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EmailAddress(IValidationBuilder, Nullable<String>)

Specifies that values must be a valid email address.

Declaration

public static IValidationBuilder EmailAddress(this IValidationBuilder builder, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder	The builder.

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Enum<TEnum>(IValidationBuilder, Boolean)

Specifies that values must be one of the values in a given set.

By default, value comparison is case-sensitive. To make matches case-insensitive, set ignoreCase to true.

Declaration

public static IValidationBuilder Enum<TEnum>(this IValidationBuilder builder, bool ignoreCase = false)
    where TEnum : struct

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.Boolean	ignoreCase	Ignore case when parsing enums.

Returns

Type	Description
IValidationBuilder	The builder.

Type Parameters

Name	Description
TEnum

Exceptions

Type	Condition
System.ArgumentException	When `TEnum` is not an enum.

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ExistingDirectory(IValidationBuilder, Nullable<String>)

Specifies that values must be a path to a directory that already exists.

Declaration

public static IValidationBuilder ExistingDirectory(this IValidationBuilder builder, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder	The builder.

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ExistingFile(IValidationBuilder, Nullable<String>)

Specifies that values must be a path to a file that already exists.

Declaration

public static IValidationBuilder ExistingFile(this IValidationBuilder builder, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder	The builder.

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ExistingFileOrDirectory(IValidationBuilder, Nullable<String>)

Specifies that values must be a valid file path or directory, and the file path must already exist.

Declaration

public static IValidationBuilder ExistingFileOrDirectory(this IValidationBuilder builder, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder	The builder.

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IsRequired(CommandArgument, Boolean, Nullable<String>)

Indicates the argument is required.

Declaration

public static CommandArgument IsRequired(this CommandArgument argument, bool allowEmptyStrings = false, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
CommandArgument	argument	The argument.
System.Boolean	allowEmptyStrings	Indicates whether an empty string is allowed.
System.Nullable<System.String>	errorMessage	The custom error message to display. See also System.ComponentModel.DataAnnotations.ValidationAttribute.ErrorMessage.

Returns

Type	Description
CommandArgument	The argument.

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IsRequired(CommandOption, Boolean, Nullable<String>)

Indicates the option is required.

Declaration

public static CommandOption IsRequired(this CommandOption option, bool allowEmptyStrings = false, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
CommandOption	option	The option.
System.Boolean	allowEmptyStrings	Indicates whether an empty string is allowed.
System.Nullable<System.String>	errorMessage	The custom error message to display. See also System.ComponentModel.DataAnnotations.ValidationAttribute.ErrorMessage.

Returns

Type	Description
CommandOption	The option.

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IsRequired<T>(CommandArgument<T>, Boolean, Nullable<String>)

Indicates the argument is required.

Declaration

public static CommandArgument<T> IsRequired<T>(this CommandArgument<T> argument, bool allowEmptyStrings = false, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
CommandArgument<T>	argument	The argument.
System.Boolean	allowEmptyStrings	Indicates whether an empty string is allowed.
System.Nullable<System.String>	errorMessage	The custom error message to display. See also System.ComponentModel.DataAnnotations.ValidationAttribute.ErrorMessage.

Returns

Type	Description
CommandArgument<T>	The argument.

Type Parameters

Name	Description
T

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IsRequired<T>(CommandOption<T>, Boolean, Nullable<String>)

Indicates the option is required.

Declaration

public static CommandOption<T> IsRequired<T>(this CommandOption<T> option, bool allowEmptyStrings = false, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
CommandOption<T>	option	The option.
System.Boolean	allowEmptyStrings	Indicates whether an empty string is allowed.
System.Nullable<System.String>	errorMessage	The custom error message to display. See also System.ComponentModel.DataAnnotations.ValidationAttribute.ErrorMessage.

Returns

Type	Description
CommandOption<T>	The option.

Type Parameters

Name	Description
T

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LegalFilePath(IValidationBuilder, Nullable<String>)

Specifies that values must be legal file paths.

Declaration

public static IValidationBuilder LegalFilePath(this IValidationBuilder builder, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder	The builder.

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MaxLength(IValidationBuilder, Int32, Nullable<String>)

Specifies that values must be a string no more than length characters long.

Declaration

public static IValidationBuilder MaxLength(this IValidationBuilder builder, int length, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.Int32	length	The maximum length.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder	The builder.

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MinLength(IValidationBuilder, Int32, Nullable<String>)

Specifies that values must be a string at least length characters long.

Declaration

public static IValidationBuilder MinLength(this IValidationBuilder builder, int length, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder
System.Int32	length	The minimum length.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder	The builder.

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NonExistingDirectory(IValidationBuilder, Nullable<String>)

Specifies that values must be a path to a directory that does not already exist.

Declaration

public static IValidationBuilder NonExistingDirectory(this IValidationBuilder builder, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder	The builder.

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NonExistingFile(IValidationBuilder, Nullable<String>)

Specifies that values must be a path to a file that does not already exist.

Declaration

public static IValidationBuilder NonExistingFile(this IValidationBuilder builder, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder	The builder.

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NonExistingFileOrDirectory(IValidationBuilder, Nullable<String>)

Specifies that values must be a valid file path or directory, and the file path must not already exist.

Declaration

public static IValidationBuilder NonExistingFileOrDirectory(this IValidationBuilder builder, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder	The builder.

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OnValidate(CommandArgument, Func<ValidationContext, ValidationResult>)

Adds a validator that runs after parsing is complete and before command execution.

Declaration

public static CommandArgument OnValidate(this CommandArgument argument, Func<ValidationContext, ValidationResult> validate)

Parameters

Type	Name	Description
CommandArgument	argument	The argument.
System.Func<System.ComponentModel.DataAnnotations.ValidationContext, System.ComponentModel.DataAnnotations.ValidationResult>	validate	The callback. Return System.ComponentModel.DataAnnotations.ValidationResult.Success if there is no error.

Returns

Type	Description
CommandArgument

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OnValidate(CommandLineApplication, Func<ValidationContext, ValidationResult>)

Adds a validator that runs after parsing is complete and before command execution.

Declaration

public static CommandLineApplication OnValidate(this CommandLineApplication command, Func<ValidationContext, ValidationResult> validate)

Parameters

Type	Name	Description
CommandLineApplication	command	The command.
System.Func<System.ComponentModel.DataAnnotations.ValidationContext, System.ComponentModel.DataAnnotations.ValidationResult>	validate	The callback. Return System.ComponentModel.DataAnnotations.ValidationResult.Success if there is no error.

Returns

Type	Description
CommandLineApplication

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OnValidate(CommandOption, Func<ValidationContext, ValidationResult>)

Adds a validator that runs after parsing is complete and before command execution.

Declaration

public static CommandOption OnValidate(this CommandOption option, Func<ValidationContext, ValidationResult> validate)

Parameters

Type	Name	Description
CommandOption	option	The option.
System.Func<System.ComponentModel.DataAnnotations.ValidationContext, System.ComponentModel.DataAnnotations.ValidationResult>	validate	The callback. Return System.ComponentModel.DataAnnotations.ValidationResult.Success if there is no error.

Returns

Type	Description
CommandOption

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Range(IValidationBuilder<Double>, Double, Double, Nullable<String>)

Specifies that values must be in a given range.

Declaration

public static IValidationBuilder<double> Range(this IValidationBuilder<double> builder, double minimum, double maximum, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder<System.Double>	builder	The builder.
System.Double	minimum	The minimum allowed value.
System.Double	maximum	The maximum allowed value.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder<System.Double>	The builder.

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Range(IValidationBuilder<Int32>, Int32, Int32, Nullable<String>)

Specifies that values must be in a given range.

Declaration

public static IValidationBuilder<int> Range(this IValidationBuilder<int> builder, int minimum, int maximum, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder<System.Int32>	builder	The builder.
System.Int32	minimum	The minimum allowed value.
System.Int32	maximum	The maximum allowed value.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder<System.Int32>	The builder.

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RegularExpression(IValidationBuilder, String, Nullable<String>)

Specifies that values must match a regular expression.

Declaration

public static IValidationBuilder RegularExpression(this IValidationBuilder builder, string pattern, string? errorMessage = default(string? ))

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.String	pattern	The regular expression.
System.Nullable<System.String>	errorMessage	A custom error message to display.

Returns

Type	Description
IValidationBuilder	The builder.

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Satisfies<TAttribute>(IValidationBuilder, Nullable<String>, Object[])

Specifies that values must satisfy the requirements of the validation attribute of type TAttribute.

Declaration

public static IValidationBuilder Satisfies<TAttribute>(this IValidationBuilder builder, string? errorMessage = default(string? ), params object[] ctorArgs)
    where TAttribute : ValidationAttribute

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.Nullable<System.String>	errorMessage	A custom error message to display.
System.Object[]	ctorArgs	Constructor arguments for `TAttribute`.

Returns

Type	Description
IValidationBuilder	The builder.

Type Parameters

Name	Description
TAttribute	The validation attribute type.

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Values(IValidationBuilder, Boolean, String[])

Specifies that values must be one of the values in a given set.

Declaration

public static IValidationBuilder Values(this IValidationBuilder builder, bool ignoreCase, params string[] allowedValues)

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.Boolean	ignoreCase	Ignore case when comparing inputs to `allowedValues`.
System.String[]	allowedValues	Allowed values.

Returns

Type	Description
IValidationBuilder	The builder.

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Values(IValidationBuilder, String[])

Specifies that values must be one of the values in a given set.

By default, value comparison is case-sensitive. To make matches case-insensitive, use Values(IValidationBuilder, Boolean, String[]).

Declaration

public static IValidationBuilder Values(this IValidationBuilder builder, params string[] allowedValues)

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.String[]	allowedValues	Allowed values.

Returns

Type	Description
IValidationBuilder	The builder.

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Values(IValidationBuilder, StringComparison, String[])

Specifies that values must be one of the values in a given set.

Declaration

public static IValidationBuilder Values(this IValidationBuilder builder, StringComparison comparer, params string[] allowedValues)

Parameters

Type	Name	Description
IValidationBuilder	builder	The builder.
System.StringComparison	comparer	The comparer used to determine if values match.
System.String[]	allowedValues	Allowed values.

Returns

Type	Description
IValidationBuilder	The builder.