SQL Server

Methods for Getting Attributes

See more XML Examples

Demonstrates some methods for getting attribute name/values.

The input XML, available at http://www.chilkatsoft.com/data/car.xml, is this:

<root>
    <car color="black" make="mercedes" model="C350" hp="302" engine="v6" type="sedan">Mercedes Benz C350</car>
</root>

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 @sTmp1 nvarchar(4000)
    DECLARE @success int
    SELECT @success = 0

    DECLARE @xml int
    EXEC @hr = sp_OACreate 'Chilkat.Xml', @xml OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    DECLARE @carNode int

    DECLARE @numAttr int

    DECLARE @horsepower int

    DECLARE @i int

    -- The sample input XML is available at http://www.chilkatsoft.com/data/car.xml
    EXEC sp_OAMethod @xml, 'LoadXmlFile', @success OUT, 'car.xml'
    IF @success <> 1
      BEGIN
        EXEC sp_OAGetProperty @xml, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @xml
        RETURN
      END

    -- Navigate to the "car" node, which is the 1st child:
    EXEC sp_OAMethod @xml, 'FirstChild', @carNode OUT

    -- Get the value of the "model" attribute:

    EXEC sp_OAMethod @carNode, 'GetAttrValue', @sTmp0 OUT, 'model'
    PRINT 'model = ' + @sTmp0

    -- Get the value of the "hp" attribute as an integer:
    EXEC sp_OAMethod @carNode, 'GetAttrValueInt', @horsepower OUT, 'hp'

    PRINT 'horsepower = ' + @horsepower

    -- Iterate over the attributes and show the name/value of each:
    EXEC sp_OAGetProperty @carNode, 'NumAttributes', @numAttr OUT

    SELECT @i = 0
    WHILE @i < @numAttr
      BEGIN
        EXEC sp_OAMethod @carNode, 'GetAttributeName', @sTmp0 OUT, @i

        EXEC sp_OAMethod @carNode, 'GetAttributeValue', @sTmp1 OUT, @i
        PRINT @sTmp0 + ': ' + @sTmp1
        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @carNode


    EXEC @hr = sp_OADestroy @xml


END
GO