SqlFunctions

IfNull

public static string IfNull(string s, string what)

result = SqlFunctions.IfNull(s, what)

SQL IFNULL (COALESCE) function for strings.

s

Value.

what

What to answer with when the value is null.

Возвращает: The value, or when it is null.

IsNull``1

public static T IsNull<T>(T s, T what)

result = SqlFunctions.IsNull(s, what)

SQL ISNULL (COALESCE) function for generic types.

s

Value.

what

What to answer with when the value is null.

Возвращает: The value, or when it is null.

Like

public static bool Like(string s, string what)

result = SqlFunctions.Like(s, what)

SQL LIKE pattern matching operator.

s

Value to compare.

what

Pattern, where % stands for any run of characters, _ for one, and [...] for a character class.

Возвращает: Whether the value matches the pattern. A null on either side matches nothing, as a comparison against NULL leaves the row out.

LikeEscaped

public static bool LikeEscaped(string s, string what)

result = SqlFunctions.LikeEscaped(s, what)

SQL LIKE pattern matching operator with an explicit ESCAPE clause, so a pattern built by String) matches the caller's text literally. Use this whenever the pattern comes from user input.

s

Value to compare.

what

Pattern whose metacharacters are escaped with EscapeChar.

Возвращает: Whether the value matches the pattern.