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//------------------------------------------------------------------------------
// <copyright file="NameValueFileSectionHandler.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Configuration {
using System.Configuration.Internal;
using System.IO;
using System.Xml;
using System.Runtime.Versioning;
/// <internalonly/>
/// <devdoc>
/// <para>
/// This section handler allows <appSettings file="user.config" />
/// The file pointed to by the file= attribute is read as if it is
/// an appSettings section in the config file.
/// Note: the user.config file must have its root element match the
/// section referring to it. So if appSettings has a file="user.config"
/// attribute the root element in user.config must also be named appSettings.
/// </para>
/// </devdoc>
public class NameValueFileSectionHandler : IConfigurationSectionHandler {
[ResourceExposure(ResourceScope.None)]
[ResourceConsumption(ResourceScope.Machine, ResourceScope.Machine)]
public object Create(object parent, object configContext, XmlNode section) {
object result = parent;
// parse XML
XmlNode fileAttribute = section.Attributes.RemoveNamedItem("file");
result = NameValueSectionHandler.CreateStatic(result, section);
if (fileAttribute != null && fileAttribute.Value.Length != 0) {
string filename = null;
filename = fileAttribute.Value;
IConfigErrorInfo configXmlNode = fileAttribute as IConfigErrorInfo;
if (configXmlNode == null) {
return null;
}
string configFile = configXmlNode.Filename;
string directory = Path.GetDirectoryName(configFile);
string sourceFileFullPath = Path.Combine(directory, filename);
if (File.Exists(sourceFileFullPath)) {
ConfigXmlDocument doc = new ConfigXmlDocument();
try {
doc.Load(sourceFileFullPath);
}
catch (XmlException e) {
throw new ConfigurationErrorsException(e.Message, e, sourceFileFullPath, e.LineNumber);
}
if (section.Name != doc.DocumentElement.Name) {
throw new ConfigurationErrorsException(
SR.GetString(SR.Config_name_value_file_section_file_invalid_root, section.Name),
doc.DocumentElement);
}
result = NameValueSectionHandler.CreateStatic(result, doc.DocumentElement);
}
}
return result;
}
}
}
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