Question

我需要在web.config中的多个WCF服务中切换出一个IP地址。使用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。对于1.2.3.4

的所有实例，用4.3.2.1切换IP地址1.2.3.4

Answer 1

假设您的Web.config是这样的（一个简化的场景，但//在XPath中无处不在）：

<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将查找整个Web.config中的每个元素，并检查给定元素是否具有值等于“1.2.3.4”的地址属性。如果你需要更通用的东西，那就试试这个：

<?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为某个部分，即<system.serviceModel>，那么您可以使用这样的XPath：

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

这将仅在<system.serviceModel>部分

中更新地址

<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>

尝试一下，选择最适合您需求的那个。

注意：这有一个限制，您需要指定包含IP的属性的名称（1.2.3.4），但我认为最好是显式而不是在这里发生魔术。如果您有许多名称，请重复

Web.config转换和搜索和替换

1 个答案: