Expressions can use Extension Methods

Class / Extension

Return

Description

String

SubstringAfter(value [,includeDelimiter = false])

String

SubstringBefore(value [,includeDelimiter = false])

String

SubstringBetween(value [,includeDelimiter = false])

String

SubstringRemove(value
    [,stringComparison = StringComparison.InvariantCulture])

String

SubstringRemoveIgnoreCase(value)

String

ToTitleCase()

String

ToOnlyAlphaAndDigits()

String

Split(string [,separator])

String

IsNumeric()

Boolean

IsInteger()

Boolean

SelectSingleNode(xpath)

XmlNode

Customer

IsInRole(roleSystemName)

(or  IsInCustomerRole(roleSystemName)  )

Boolean

E.g. Customer.IsInRole("Free Shipping") 

Be sure to assign the Role's "System name" field.

If you need to do a wildcard match, use e.g.  Customer.CustomerRoles.Any(SystemName.Contains("Discount"))

(UPDATE: The  CustomerRoles collection  no longer works as of SD for 4.30 -

GetAttribute(attributeName)

String

GetAttributeValues(attributeName [valueSeparator])

String

attribute value, or if list/checkboxes, then separated list of selected values for attribute (nopC 3.30+)

HasAttributeValue(attributeName)

HasAttributeValue(attributeName, valueId)

Boolean

True if has attribute [and value]

HasDiscountCouponCode("couponcode")

Boolean

True if customer used coupon code. (Case is ignored,)

AppliedDiscountCouponCodes()

string[]

You can use .Contains(), .Any(), etc. to test the array

Example: Customer.AppliedDiscountCouponCodes().Any()

GetOrders()

Orders collection

GetRewardPointsBalancePoints()

Integer

GetRewardPointsBalanceAmount()

Decimal

Product

HasCategory(categoryName)

Boolean

 Example: Product.HasCategory("Free Shipping")

HasCategory(categoryId)

Boolean

 Example: Product.HasCategory(5)

HasCategoryMatch(categoryNameRegex)

Boolean

 Example: Product.HasCategoryMatch("Brushes") 

   (has a category that has the word "Brushes" in its name)

HasParentCategory(categoryName)

Boolean

HasParentCategory(categoryId)

Boolean

HasParentCategoryMatch(categoryNameRegex)

Boolean

HasManufacturer(manufacturerName)

Boolean

HasManufacturer(manufacturerId)

Boolean

ShoppingCartItem

GetWeight()

Decimal

Shopping Cart Item Weight (Includes attribute weight if any.) (The weight is for single item; multiply by Quantity if required)

GetAttributeValues(attributeName [, valueSeparator = ", "])

String

returns string of separated values for given attributeName

HasAttributeValue(attributeName [, valueName])

Boolean

if no valueName param passed, then any for given attributeName

HasAttributeValue(valueId)

Boolean

GetVendor()

Vendor

GetVendorAddresses()

Address collection

GetShippingOriginAddress()

Address

If the product has a warehouse assigned, then this returns that warehouse's address, otherwise it returns the shipping origin address in Shipping Settings.

example: surcharge if any cart items are being shipped from Zip Code 12345

GetWarehouse()

Warehouse

GetSubTotalWithDiscounts()

Decimal

GetSubTotalWithoutDiscounts()

Decimal

HasSku(sku)

Boolean

 Will also test against product attribute combinations SKU

Address

ToSenderString([defaultIfNone])

String

*

GetState()

StateProvince

In Shipping Director you can just use State to get the two character state abbreviation.
In Payment Director you can use ShippingAddress.GetState().Abbreviation

GetCountry()

Country

In Shipping Director you can just use Country to get the two character country code.
In Payment Director you can use ShippingAddress.GetCountry().TwoLetterIsoCode

ZipPostalCode

string

In Shipping Director you can just use Zip to get the postal zip code.
In Payment Director you can use ShippingAddress.ZipPostalCode

GetAttributeValues()

string

Since attributes can be defined as checkboxes that can multi-select
this function can return a comma separated value
If your field is a Text Box expecting a numeric value, you can parse it
Example: Decimal.Parse(ShippingAddress.GetAttributeValues("MinShippingAmount"))

Warehouse

ToSenderString([defaultIfNone])

String

**

GetAddress()

String

Check that a product has a warehouse before using this.  It's safer to use an Item's GetShippingOrigiAddress() (see above)

(Root)

GetLocaleStringResourceByName(resourceName)

String