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RuleContext

Provides access to dependency rule results during execution. Used with DependsOnRuleId.

public class RuleContext

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Methods

GetResult(Guid)

Gets the RuleResult for a specific rule ID.

var dependencyResult = context.GetResult(validateCustomer.Id);
if (dependencyResult.Success)
{
    // dependency passed
}

GetValue<T>(Guid)

Gets the typed Value from a rule’s result.

int taxAmount = context.GetValue<int>(taxRule.Id);

⚠️ Caution: Returns default(T) when rule not found — ambiguous for value types.

TryGetValue<T>(Guid, out T)

Safer alternative that distinguishes “not found” from “value was default”.

if (context.TryGetValue<int>(taxRule.Id, out var amount))
{
    Console.WriteLine($"Tax: {amount}");
}
else
{
    Console.WriteLine("Tax rule not found or failed");
}

StoreResult(Guid, RuleResult)

Stores a result (called internally by the execution engine).

context.StoreResult(rule.Id, result);

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Usage with DependsOnRuleId

var taxRule = new Rule
{
    Description = "Calculate tax",
    Action = "customer.TaxAmount = customer.Amount * 0.08"
};

var totalRule = new Rule
{
    Description = "Calculate total",
    DependsOnRuleId = taxRule.Id,
    Expression = "context.TryGetValue<decimal>(taxRule.Id, out var tax)",
    Action = "customer.Total = customer.Amount + tax"
};

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Related

• Rule.DependsOnRuleId — Dependency declaration
• Rule.ExecuteWithContext — Execution with context