AppSettingsSection.cs source code in C# .NET

                        Code:
                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / whidbey / NetFXspW7 / ndp / fx / src / Configuration / System / Configuration / AppSettingsSection.cs / 1 / AppSettingsSection.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Configuration { 
    using System; 
    using System.Xml;
    using System.Configuration; 
    using System.Collections.Specialized;
    using System.Collections;
    using System.IO;
    using System.Text; 

    public sealed class AppSettingsSection : ConfigurationSection { 
        private static ConfigurationPropertyCollection  s_properties; 
        private static ConfigurationProperty            s_propAppSettings;
        private static ConfigurationProperty            s_propFile; 

        private KeyValueInternalCollection _KeyValueCollection = null;

        private static ConfigurationPropertyCollection EnsureStaticPropertyBag() { 
            if (s_properties == null) {
                s_propAppSettings = new ConfigurationProperty(null, typeof(KeyValueConfigurationCollection), null, ConfigurationPropertyOptions.IsDefaultCollection); 
                s_propFile = new ConfigurationProperty("file", typeof(string), String.Empty, ConfigurationPropertyOptions.None); 

                ConfigurationPropertyCollection properties = new ConfigurationPropertyCollection(); 
                properties.Add(s_propAppSettings);
                properties.Add(s_propFile);
                s_properties = properties;
            } 

            return s_properties; 
        } 

        public AppSettingsSection() { 
            EnsureStaticPropertyBag();
        }

        protected internal override ConfigurationPropertyCollection Properties { 
            get {
                return EnsureStaticPropertyBag(); 
            } 
        }
 
        protected internal override object GetRuntimeObject() {
            SetReadOnly();
            return this.InternalSettings;            // return the read only object
        } 

        internal NameValueCollection InternalSettings { 
            get { 
                if (_KeyValueCollection == null) {
                    _KeyValueCollection = new KeyValueInternalCollection(this); 
                }
                return (NameValueCollection)_KeyValueCollection;
            }
        } 

        [ConfigurationProperty("", IsDefaultCollection = true)] 
        public KeyValueConfigurationCollection Settings { 
            get {
                return (KeyValueConfigurationCollection)base[s_propAppSettings]; 
            }
        }

        [ConfigurationProperty("file", DefaultValue = "")] 
        public string File {
            get { 
                string fileValue = (string)base[s_propFile]; 
                if (fileValue == null) {
                    return String.Empty; 
                }
                return fileValue;
            }
            set { 
                base[s_propFile] = value;
            } 
        } 
        protected internal override void Reset(ConfigurationElement parentSection) {
            _KeyValueCollection = null; 
            base.Reset(parentSection);
            if (!String.IsNullOrEmpty((string)base[s_propFile])) { // don't inherit from the parent
                SetPropertyValue(s_propFile,null,true); // ignore the lock to prevent inheritence
            } 
        }
 
 
        protected internal override bool IsModified() {
            return base.IsModified(); 
        }

        protected internal override string SerializeSection(ConfigurationElement parentElement, string name, ConfigurationSaveMode saveMode) {
            return base.SerializeSection(parentElement, name, saveMode); 
        }
 
        protected internal override void DeserializeElement(XmlReader reader, bool serializeCollectionKey) { 
            string ElementName = reader.Name;
 
            base.DeserializeElement(reader, serializeCollectionKey);
            if ((File != null) && (File.Length > 0)) {
                string sourceFileFullPath;
                string configFileDirectory; 
                string configFile;
 
                // Determine file location 
                configFile = ElementInformation.Source;
 
                if (String.IsNullOrEmpty(configFile)) {
                    sourceFileFullPath = File;
                }
                else { 
                    configFileDirectory = System.IO.Path.GetDirectoryName(configFile);
                    sourceFileFullPath = System.IO.Path.Combine(configFileDirectory, File); 
                } 

                if (System.IO.File.Exists(sourceFileFullPath)) { 
                    int lineOffset = 0;
                    string rawXml = null;

                    using (Stream sourceFileStream = new FileStream(sourceFileFullPath, FileMode.Open, FileAccess.Read, FileShare.Read)) { 
                        using (XmlUtil xmlUtil = new XmlUtil(sourceFileStream, sourceFileFullPath, true)) {
                            if (xmlUtil.Reader.Name != ElementName) { 
                                throw new ConfigurationErrorsException( 
                                        SR.GetString(SR.Config_name_value_file_section_file_invalid_root, ElementName),
                                        xmlUtil); 
                            }

                            lineOffset = xmlUtil.Reader.LineNumber;
                            rawXml = xmlUtil.CopySection(); 

                            // Detect if there is any XML left over after the section 
                            while (!xmlUtil.Reader.EOF) { 
                                XmlNodeType t = xmlUtil.Reader.NodeType;
                                if (t != XmlNodeType.Comment) { 
                                    throw new ConfigurationErrorsException(SR.GetString(SR.Config_source_file_format), xmlUtil);
                                }

                                xmlUtil.Reader.Read(); 
                            }
                        } 
                    } 

                    ConfigXmlReader internalReader = new ConfigXmlReader(rawXml, sourceFileFullPath, lineOffset); 
                    internalReader.Read();
                    if (internalReader.MoveToNextAttribute()) {
                        throw new ConfigurationErrorsException(SR.GetString(SR.Config_base_unrecognized_attribute, internalReader.Name), (XmlReader)internalReader);
                    } 

                    internalReader.MoveToElement(); 
 
                    base.DeserializeElement(internalReader, serializeCollectionKey);
                } 
            }
        }
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Configuration { 
    using System; 
    using System.Xml;
    using System.Configuration; 
    using System.Collections.Specialized;
    using System.Collections;
    using System.IO;
    using System.Text; 

    public sealed class AppSettingsSection : ConfigurationSection { 
        private static ConfigurationPropertyCollection  s_properties; 
        private static ConfigurationProperty            s_propAppSettings;
        private static ConfigurationProperty            s_propFile; 

        private KeyValueInternalCollection _KeyValueCollection = null;

        private static ConfigurationPropertyCollection EnsureStaticPropertyBag() { 
            if (s_properties == null) {
                s_propAppSettings = new ConfigurationProperty(null, typeof(KeyValueConfigurationCollection), null, ConfigurationPropertyOptions.IsDefaultCollection); 
                s_propFile = new ConfigurationProperty("file", typeof(string), String.Empty, ConfigurationPropertyOptions.None); 

                ConfigurationPropertyCollection properties = new ConfigurationPropertyCollection(); 
                properties.Add(s_propAppSettings);
                properties.Add(s_propFile);
                s_properties = properties;
            } 

            return s_properties; 
        } 

        public AppSettingsSection() { 
            EnsureStaticPropertyBag();
        }

        protected internal override ConfigurationPropertyCollection Properties { 
            get {
                return EnsureStaticPropertyBag(); 
            } 
        }
 
        protected internal override object GetRuntimeObject() {
            SetReadOnly();
            return this.InternalSettings;            // return the read only object
        } 

        internal NameValueCollection InternalSettings { 
            get { 
                if (_KeyValueCollection == null) {
                    _KeyValueCollection = new KeyValueInternalCollection(this); 
                }
                return (NameValueCollection)_KeyValueCollection;
            }
        } 

        [ConfigurationProperty("", IsDefaultCollection = true)] 
        public KeyValueConfigurationCollection Settings { 
            get {
                return (KeyValueConfigurationCollection)base[s_propAppSettings]; 
            }
        }

        [ConfigurationProperty("file", DefaultValue = "")] 
        public string File {
            get { 
                string fileValue = (string)base[s_propFile]; 
                if (fileValue == null) {
                    return String.Empty; 
                }
                return fileValue;
            }
            set { 
                base[s_propFile] = value;
            } 
        } 
        protected internal override void Reset(ConfigurationElement parentSection) {
            _KeyValueCollection = null; 
            base.Reset(parentSection);
            if (!String.IsNullOrEmpty((string)base[s_propFile])) { // don't inherit from the parent
                SetPropertyValue(s_propFile,null,true); // ignore the lock to prevent inheritence
            } 
        }
 
 
        protected internal override bool IsModified() {
            return base.IsModified(); 
        }

        protected internal override string SerializeSection(ConfigurationElement parentElement, string name, ConfigurationSaveMode saveMode) {
            return base.SerializeSection(parentElement, name, saveMode); 
        }
 
        protected internal override void DeserializeElement(XmlReader reader, bool serializeCollectionKey) { 
            string ElementName = reader.Name;
 
            base.DeserializeElement(reader, serializeCollectionKey);
            if ((File != null) && (File.Length > 0)) {
                string sourceFileFullPath;
                string configFileDirectory; 
                string configFile;
 
                // Determine file location 
                configFile = ElementInformation.Source;
 
                if (String.IsNullOrEmpty(configFile)) {
                    sourceFileFullPath = File;
                }
                else { 
                    configFileDirectory = System.IO.Path.GetDirectoryName(configFile);
                    sourceFileFullPath = System.IO.Path.Combine(configFileDirectory, File); 
                } 

                if (System.IO.File.Exists(sourceFileFullPath)) { 
                    int lineOffset = 0;
                    string rawXml = null;

                    using (Stream sourceFileStream = new FileStream(sourceFileFullPath, FileMode.Open, FileAccess.Read, FileShare.Read)) { 
                        using (XmlUtil xmlUtil = new XmlUtil(sourceFileStream, sourceFileFullPath, true)) {
                            if (xmlUtil.Reader.Name != ElementName) { 
                                throw new ConfigurationErrorsException( 
                                        SR.GetString(SR.Config_name_value_file_section_file_invalid_root, ElementName),
                                        xmlUtil); 
                            }

                            lineOffset = xmlUtil.Reader.LineNumber;
                            rawXml = xmlUtil.CopySection(); 

                            // Detect if there is any XML left over after the section 
                            while (!xmlUtil.Reader.EOF) { 
                                XmlNodeType t = xmlUtil.Reader.NodeType;
                                if (t != XmlNodeType.Comment) { 
                                    throw new ConfigurationErrorsException(SR.GetString(SR.Config_source_file_format), xmlUtil);
                                }

                                xmlUtil.Reader.Read(); 
                            }
                        } 
                    } 

                    ConfigXmlReader internalReader = new ConfigXmlReader(rawXml, sourceFileFullPath, lineOffset); 
                    internalReader.Read();
                    if (internalReader.MoveToNextAttribute()) {
                        throw new ConfigurationErrorsException(SR.GetString(SR.Config_base_unrecognized_attribute, internalReader.Name), (XmlReader)internalReader);
                    } 

                    internalReader.MoveToElement(); 
 
                    base.DeserializeElement(internalReader, serializeCollectionKey);
                } 
            }
        }
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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AppSettingsSection.cs source code in C# .NET

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