Question

我写了一个web服务和一个webmethod，它以xml格式返回我的类列表（DOVIZ_RETURN），如下所示：

 <?xml version="1.0" encoding="utf-8"?>
<ArrayOfDOVIZ_RETURN xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://tempuri.org/">
    <DOVIZ_RETURN>
        <dovizAdi>AMERİKAN DOLARI</dovizAdi>
        <dovizKodu>USD</dovizKodu>
        <dovizAlis>1.7928</dovizAlis>
        <dovizSatis>1.8014</dovizSatis>
    </DOVIZ_RETURN>
    <DOVIZ_RETURN>
        <dovizAdi>KANADA DOLARI</dovizAdi>
        <dovizKodu>CAD</dovizKodu>
        <dovizAlis>1.8321</dovizAlis>
        <dovizSatis>1.8404</dovizSatis>
    </DOVIZ_RETURN>
</ArrayOfDOVIZ_RETURN>

和我正在成功地使用存储过程调用此服务。我得到这个xml。但是当ı用下面的sql解析这个xml时，它返回任何行只返回列标题;请看下面：

ALTER PROCEDURE GET_DOVIZ_KUR_RESULT_FROM_SERVIS

AS
    declare @obj int
    declare @servisUrl varchar(200)
    declare @response xml

    SET @servisUrl='http://localhost/DovizKurTestApp/DovizKurService.asmx/GET_DOVIZ_KUR'

    EXEC sp_OACreate 'MSXML2.ServerXMLHttp', @obj OUT
    EXEC sp_OAMethod @obj,'Open',NULL,'GET',@servisUrl,false
    EXEC sp_OAMethod @obj,'send'
    EXEC sp_OAGetProperty @obj, 'responseText', @response OUT

    create table #DOVIZ_KUR (dovizKurList xml)
    insert into #DOVIZ_KUR select @response 

    SELECT
    a.b.value('dovizAdi[1]', 'Varchar(100)') DovizAdi,
    a.b.value('dovizKodu[1]', 'Varchar(100)') DovizKodu,
    a.b.value('dovizAlis[1]', 'Varchar(100)') DovizAlis,
    a.b.value('dovizSatis[1]', 'Varchar(100)') DovizSatis
    FROM #DOVIZ_KUR
    CROSS APPLY dovizKurList.nodes('/ArrayOfDOVIZ_RETURN/DOVIZ_RETURN') AS a(b)

    EXEC sp_OADestroy @obj

RETURN

这里有什么问题？

Answer 1

之所以这样，是因为名称空间包含在XML中。

你可以试试这个

SELECT  
    a.b.value('declare namespace MI="http://tempuri.org/"; MI:dovizAdi[1]', 'Varchar(100)') DovizAdi, 
    a.b.value('declare namespace MI="http://tempuri.org/"; MI:dovizKodu[1]', 'Varchar(100)') DovizKodu, 
    a.b.value('declare namespace MI="http://tempuri.org/"; MI:dovizAlis[1]', 'Varchar(100)') DovizAlis, 
    a.b.value('declare namespace MI="http://tempuri.org/"; MI:dovizSatis[1]', 'Varchar(100)') DovizSatis 
FROM @DOVIZ_KUR d
    CROSS APPLY dovizKurList.nodes('
    declare namespace MI="http://tempuri.org/";
    /MI:ArrayOfDOVIZ_RETURN/MI:DOVIZ_RETURN') AS a(b)

或更好

;WITH XMLNAMESPACES('http://tempuri.org/' as MI)
SELECT  
    a.b.value('MI:dovizAdi[1]', 'Varchar(100)') DovizAdi, 
    a.b.value('MI:dovizKodu[1]', 'Varchar(100)') DovizKodu, 
    a.b.value('MI:dovizAlis[1]', 'Varchar(100)') DovizAlis, 
    a.b.value('MI:dovizSatis[1]', 'Varchar(100)') DovizSatis 
FROM @DOVIZ_KUR d
    CROSS APPLY dovizKurList.nodes('/MI:ArrayOfDOVIZ_RETURN/MI:DOVIZ_RETURN') AS a(b)

使用T-SQL解析XML会返回任何内容

1 个答案:

SQL Fiddle Demo