ConfigurationProviderBase

gistfile1.cs

public abstract class ConfigurationProviderBase<TSection, TException>
    where TSection : ConfigurationSection
    where TException : Exception, new()
 {
    /// <summary>
    /// Name of the section to read from the app.config.
    /// </summary>
    private string sectionName;
 
    /// <summary>
    /// Config object used to read a custom configuration file.
    /// If not set the default file will be used.
    /// </summary>
    private System.Configuration.Configuration config;
 
    /// <summary>
    /// Initialize the provider.
    /// </summary>
    /// <param name="sectionName"></param>
    public ConfigurationProviderBase(string sectionName)
    {
        this.sectionName = sectionName;
    }
 
    /// <summary>
    /// Set a custom configuration file.
    /// </summary>
    /// <param name="config"></param>
    public void SetConfigurationFile(string file)
    {
        // Create the mapping.
        ExeConfigurationFileMap fileMap = new ExeConfigurationFileMap();
        fileMap.ExeConfigFilename = file;
 
        // Open the configuration.
        config = ConfigurationManager.OpenMappedExeConfiguration(fileMap, ConfigurationUserLevel.None);
    }
 
    /// <summary>
    /// Read the configuration file.
    /// </summary>
    /// <returns></returns>
    protected TSection Read()
    {
        // Try to read the config section.
        TSection section = GetSection() as TSection;
        if (section == null)
            throw new TException();
 
        // Done.
        return section;
    }
 
    /// <summary>
    /// Get the section from the default configuration file or from the custom one.
    /// </summary>
    /// <returns></returns>
    private object GetSection()
    {
        if (config != null)
            return config.GetSection(sectionName);
        else
            return ConfigurationManager.GetSection(sectionName);
    }
 }