GuidExtensions

Provides GUID manipulation and validation utilities.

Overview

The GuidExtensions class offers utilities for GUID operations including validation, formatting, and sequential GUID generation.

API Reference

GuidExtensions

Core Methods

Validation Operations

IsEmpty(Guid guid)

Checks if a GUID is empty (all zeros).

var emptyGuid = Guid.Empty;
var isEmptyGuid = emptyGuid.IsEmpty(); // true

var newGuid = Guid.NewGuid();
var isNewEmpty = newGuid.IsEmpty(); // false

IsValid(string guidString)

Validates if a string represents a valid GUID.

bool valid1 = "123e4567-e89b-12d3-a456-426614174000".IsValidGuid(); // true
bool valid2 = "invalid-guid-string".IsValidGuid(); // false

Sequential GUID Operations

GetPlusOne(Guid guid)

Generates the next sequential GUID (useful for database optimization).

var baseGuid = Guid.Parse("123e4567-e89b-12d3-a456-426614174000");
var nextGuid = baseGuid.GetPlusOne();
// Results in the next sequential GUID

Practical Examples

Database Entity Management

public class EntityIdGenerator
{
    private Guid _lastGeneratedId = Guid.Empty;

    public Guid GenerateSequentialId()
    {
        if (_lastGeneratedId.IsEmpty())
        {
            _lastGeneratedId = Guid.NewGuid();
        }
        else
        {
            _lastGeneratedId = _lastGeneratedId.GetPlusOne();
        }

        return _lastGeneratedId;
    }
}

Input Validation

public class GuidValidator
{
    public ValidationResult ValidateGuidInput(string input)
    {
        if (string.IsNullOrWhiteSpace(input))
        {
            return new ValidationResult("GUID cannot be empty");
        }

        if (!input.IsValidGuid())
        {
            return new ValidationResult("Invalid GUID format");
        }

        var guid = Guid.Parse(input);
        if (guid.IsEmpty())
        {
            return new ValidationResult("GUID cannot be empty");
        }

        return ValidationResult.Success;
    }
}

Best Practices

1. Empty Validation: Always check for empty GUIDs in business logic
2. String Validation: Validate GUID strings before parsing
3. Sequential GUIDs: Use for database performance optimization
4. Immutability: Remember that GUIDs are immutable value types