spwebonfigmodification以不期望的顺序添加子节点

Question

我有一些代码使用spwebconfigmodification，将几个节点添加到system.webserver /模块部分。我要做的是添加一个生成的icoticetagcode，然后是一个生成的icetagcode。

无论我何种要做，web.config始终在<remove name="MyModule" />之前始终使用<add name="MyModule" type="[type full assembly path]">。这显然不正确，因为模块在添加后将删除。我要做的就是删除它，然后添加它。这是web.config最终看起来像：

<configuration>
    <system.webServer>
        <modules runAllManagedModulesForAllRequests="true">
            <add name="MyModule" type="[type full assembly path]" />
            <remove name="MyModule" />
        </modules>
    </system.webServer>
</configuration>

.

这是我想要它的样子：

<configuration>
    <system.webServer>
        <modules runAllManagedModulesForAllRequests="true">
            <remove name="MyModule" />
            <add name="MyModule" type="[type full assembly path]" />
        </modules>
    </system.webServer>
</configuration>

.

..而且这里是代码，它在spfeaturereceiver期间执行.featureInstalled：

SPSecurity.RunWithElevatedPrivileges(delegate
{
    SPWebService spWebService = SPWebService.ContentService;

    var moduleModification = new SPWebConfigModification
    {
        Path = "configuration/system.webServer/modules",
        Name = "remove[@name='MyModule']",
        Sequence = 0,
        Owner = "Sample",
        Type = SPWebConfigModification.SPWebConfigModificationType.EnsureChildNode,
        Value = "<remove name='MyModule' />",
    };
    spWebService.WebConfigModifications.Add(moduleModification);
    spWebService.Update();
    spWebService.ApplyWebConfigModifications();

    moduleModification = new SPWebConfigModification
    {
        Path = "configuration/system.webServer/modules",
        Name = "add[@name='MyModule'][@type='[type full assembly path]']",
        Sequence = 1000,
        Owner = "Sample",
        Type = SPWebConfigModification.SPWebConfigModificationType.EnsureChildNode,
        Value = "<add name='MyModule' type='type full assembly path' />",
    };
    spWebService.WebConfigModifications.Add(moduleModification);

    spWebService.Update();
    spWebService.ApplyWebConfigModifications();
});

.

...我知道我应该能够在调用更新和应用程序Webconfigmodifications之前能够制作这些更改，但只需在此方法中拥有此代码，因为我无法弄清楚它为什么将添加的添加剂放在上面去掉。为什么这是这样做的？它试图按字母顺序排列吗？如何指定订单？

Answer 1

Yes, the nodes are being alphabetically sorted and the Sequence property only applies when the Name property is exactly the same. To fix, use a little XPath trickery to get your nodes to sort in the correct order (first modules[1=1] then modules[2=2]):

SPSecurity.RunWithElevatedPrivileges(delegate
{
    SPWebService spWebService = SPWebService.ContentService;

    var moduleModification = new SPWebConfigModification
    {
        Path = "configuration/system.webServer",
        Name = "modules[1=1]/remove[@name='MyModule']",
        Sequence = 0,
        Owner = "Sample",
        Type = SPWebConfigModification.SPWebConfigModificationType.EnsureChildNode,
        Value = "<remove name='MyModule' />",
    };
    spWebService.WebConfigModifications.Add(moduleModification);

    moduleModification = new SPWebConfigModification
    {
        Path = "configuration/system.webServer",
        Name = "modules[2=2]/add[@name='MyModule'][@type='[type full assembly path]']",
        Sequence = 1000,
        Owner = "Sample",
        Type = SPWebConfigModification.SPWebConfigModificationType.EnsureChildNode,
        Value = "<add name='MyModule' type='type full assembly path' />",
    };
    spWebService.WebConfigModifications.Add(moduleModification);

    spWebService.Update();
    spWebService.ApplyWebConfigModifications();
});

Also, you might want to double check what happens when you call ApplyWebConfigModifications to make sure your changes are propagated across the farm. Since you're calling it on an SPWebService I think it is OK but we always use the following:

webApp.Farm.Services.GetValue<SPWebService>().ApplyWebConfigModifications();

Sources:

• Master the order of WebConfigModifications
• How To: Modify the web.config file in SharePoint using SPWebConfigModification