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我需要在 web.config 中的多个 WCF 服务中切换一个 IP 地址。通过 web.config 转换,除了通过 xpath 指定每个地址之外,还有什么方法可以创建搜索和替换语句。例如,为 1.2.3.4 的所有实例切换 IP 地址 1.2.3.4 和 4.3.2.1

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假设您的 Web.config 是这样的(一个简化的场景,但 // 在 XPath 中适用于任何地方):

<configuration>
    <endpoint address="1.2.3.4" />
    <endpoint address="1.2.3.4" />
    <endpoint address="1.2.3.4" />
    <endpoint address="1.2.3.4" />
</configuration>

那么你将需要这样的东西:

<?xml version="1.0"?>    
<!-- For more information on using web.config transformation visit http://go.microsoft.com/fwlink/?LinkId=125889 -->    
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">

    <replaceAll>
        <endpontAddresses xdt:Locator="XPath(//endpoint[@address='1.2.3.4'])" xdt:Transform="SetAttributes(address)" address="4.3.2.1" />
    </replaceAll>

</configuration>

注意:此 XPath 将查找每个整个 Web.config 中的元素并检查给定元素是否具有值等于“1.2.3.4”的地址属性。如果您需要更通用的东西,请尝试以下操作:

<?xml version="1.0"?>
    <!-- For more information on using web.config transformation visit http://go.microsoft.com/fwlink/?LinkId=125889 -->    
    <configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">

        <replaceAll>
            <endpontAddresses xdt:Locator="XPath(//*[@address='1.2.3.4'])" xdt:Transform="SetAttributes(address)" address="4.3.2.1" />
        </replaceAll>

    </configuration>

这将查看每个 XML 元素(由于星号:*)并检查它是否具有值等于“1.2.3.4”的地址属性。所以这适用于这样的文件:

<configuration>
    <endpoint name="serviceA" address="1.2.3.4" />
    <endpoint name="serviceB" address="1.2.3.4" />
    <endpoint name="serviceC" address="1.2.3.4" />
    <endpoint2 address="1.2.3.4" />
    <endpoint3 address="1.2.3.4" />
    <endpoint4 address="1.2.3.4" />

    <innerSection>
    <endpoint address="1.2.3.4" />
    <anotherEndpoint address="1.2.3.4" />
    <sampleXmlElement address="1.2.3.4" />
    </innerSection>
</configuration>

现在,如果您想将替换限制在某个部分,即<system.serviceModel>您可以使用这样的 XPath:

    <endpontAddresses xdt:Locator="XPath(/configuration/system.serviceModel//*[@address='1.2.3.4'])" xdt:Transform="SetAttributes(address)" address="4.3.2.1" />

这将仅更新<system.serviceModel>部分中的地址

<configuration>
    <endpoint name="serviceA" address="1.2.3.4" />
    <endpoint name="serviceB" address="1.2.3.4" />
    <endpoint name="serviceC" address="1.2.3.4" />
    <endpoint2 address="1.2.3.4" />
    <endpoint3 address="1.2.3.4" />
    <endpoint4 address="1.2.3.4" />

    <innerSection>
    <endpoint address="1.2.3.4" />
    <anotherEndpoint address="1.2.3.4" />
    <sampleXmlElement address="1.2.3.4" />
    </innerSection>

    <system.serviceModel>
    <endpoint name="serviceB" address="1.2.3.4" />
    <endpoint name="serviceC" address="1.2.3.4" />
    <endpoint2 address="1.2.3.4" />
    <innerSection>
      <endpoint address="1.2.3.4" />
      <anotherEndpoint address="1.2.3.4" />
      <sampleXmlElement address="1.2.3.4" />
      </innerSection>
    </system.serviceModel>

</configuration>

试一试,选择最适合您需求的。

注意:这有一个限制,您需要指定包含 IP (1.2.3.4) 的属性的名称是什么,但我认为最好是明确的,而不是在这里发生魔法。如果您有许多属性名称,请重复

于 2012-04-02T16:09:53.937 回答