SQL Server

Get the Last N Lines of a StringBuilder

Returns up to the last N lines of the contents of a Chilkat StringBuilder. SQL Server

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    DECLARE @sb int
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sb OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @i int
    SELECT @i = 1
    WHILE @i < 100
      BEGIN
        DECLARE @success int
        EXEC sp_OAMethod @sb, 'Append', @success OUT, 'This is line number '
        EXEC sp_OAMethod @sb, 'AppendInt', @success OUT, @i
        EXEC sp_OAMethod @sb, 'Append', @success OUT, CHAR(13) + CHAR(10)
        SELECT @i = @i + 1
      END

    DECLARE @bCrlf int
    SELECT @bCrlf = 1
    EXEC sp_OAMethod @sb, 'LastNLines', @sTmp0 OUT, 12, @bCrlf
    PRINT @sTmp0

    -- Output is:
    -- 
    -- 	This is line number 88
    -- 	This is line number 89
    -- 	This is line number 90
    -- 	This is line number 91
    -- 	This is line number 92
    -- 	This is line number 93
    -- 	This is line number 94
    -- 	This is line number 95
    -- 	This is line number 96
    -- 	This is line number 97
    -- 	This is line number 98
    -- 	This is line number 99
    -- 

    EXEC @hr = sp_OADestroy @sb


END
GO