1
<httpErrors errorMode="Custom" existingResponse="Replace">
<clear/>
<remove statusCode="404" subStatusCode="-1"/>
<error statusCode="404" path="/testapp/nofound.ashx" responseMode="ExecuteURL"/>
</httpErrors>
error[path]必须是绝对路径,如果有虚拟目录,还得指定虚拟目录
2.在很多时候我们需要自定义我们自己的自定义App.config 文件,而微软为我们提供了默认的
System.Configuration.NameValueSectionHandler NameValueCollection
System.Configuration.DictionarySectionHandler Hashtable
System.Configuration.SingleTagSectionHandler Hashtable
<section name="SingleTagSectionTest" type="System.Configuration.SingleTagSectionHandler" />
<section name="DictionarySectionTest" type="System.Configuration.DictionarySectionHandler" />
<section name="NameValueSectionTest" type="System.Configuration.NameValueSectionHandler" />
<SingleTagSectionTest user="test" age="30" birthday="2020-01-01"/>
<DictionarySectionTest>
<add key="user" value="a" />
<add key="user" value="b" />
<add key="age" value="30" />
</DictionarySectionTest>
<NameValueSectionTest>
<add key="user" value="a" />
<add key="user" value="b" />
<add key="age" value="30" />
</NameValueSectionTest>