private void treeConfig_BeforeExpand(object sender, TreeViewCancelEventArgs e)
{
if (!(e.Node is ExTreeNode))
{
return;
}
ExTreeNode eNode = e.Node as ExTreeNode;
if (eNode.ChildInitFlag)
{
return;
}
eNode.ChildInitFlag = true;
if (object.ReferenceEquals(null, eNode.Tag) || !(eNode.Tag is ConfigurationSectionGroup))
{
return;
}
ConfigurationSectionGroup group = eNode.Tag as ConfigurationSectionGroup;
object obj = null;
IEnumerator <PropertyInfo> enumerator = null;
TreeNode node = null;
eNode.Nodes.Clear();
//处理定义的所有配置组单元
enumerator = ConfigurationHelper.GetDeclaredSubSectionGroups(group.GetType());
while (enumerator.MoveNext())
{
obj = ConfigurationHelper.GetConfigurationSectionGroup(group, enumerator.Current.Name, enumerator.Current.PropertyType, true, true);
node = NewConfigurationSectionGroupNode(enumerator.Current.Name, obj);
node.ToolTipText = GetDescription(enumerator.Current);
e.Node.Nodes.Add(eNode);
}
//处理定义的所有配置段单元
enumerator = ConfigurationHelper.GetDeclaredSubSections(group.GetType());
while (enumerator.MoveNext())
{
obj = ConfigurationHelper.GetConfigurationSection(group, enumerator.Current.Name, enumerator.Current.PropertyType, true, true);
node = NewConfigurationSectionNode(enumerator.Current.Name, obj);
node.ToolTipText = GetDescription(enumerator.Current);
e.Node.Nodes.Add(node);
}
}
/// <summary>
/// 获取配置组中定义的所有子配置段信息
/// </summary>
/// <param name="group">配置组</param>
/// <returns>包含配置组中声明的所有ConfigurationSection属性信息的迭代器</returns>
public static IEnumerator <PropertyInfo> GetDeclaredSubSections(ConfigurationSectionGroup group)
{
if (object.ReferenceEquals(null, group))
{
return(null);
}
return(GetDeclaredSubSections(group.GetType()));
}
private static T GetSectionGroupInstance <T>(string sectionGroupName) where T : ConfigurationSectionGroup
{
if (string.IsNullOrEmpty(sectionGroupName))
{
return(Activator.CreateInstance <T>());
}
System.Configuration.Configuration appConfig =
ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
ConfigurationSectionGroup instance = appConfig.GetSectionGroup(sectionGroupName);
return((instance == null || !typeof(T).IsAssignableFrom(instance.GetType()))
? Activator.CreateInstance <T>()
: instance as T);
}
/// <summary>
/// 从配置组集合中获取一个配置组
/// </summary>
/// <typeparam name="T">要获取的配置组类型</typeparam>
/// <param name="groups">配置组集合</param>
/// <param name="groupName">要获取的配置组名称</param>
/// <param name="createWhenNonExist">不存在时创建</param>
/// <param name="replaceWhenTypeConflict">获取到的配置组类型与指定类型不一致时是否覆盖</param>
/// <returns>指定的配置组</returns>
public static ConfigurationSectionGroup GetConfigurationSectionGroup(ConfigurationSectionGroup fatherConfigGroup, string groupName, Type groupType, bool createWhenNonExist, bool replaceWhenTypeConflict)
{
if (object.ReferenceEquals(null, fatherConfigGroup) || object.ReferenceEquals(null, groupType) || object.ReferenceEquals(null, groupName) || groupName.Length == 0)
{
return(null);
}
ConfigurationSectionGroup group = null;
bool typeConflict = false;
try
{
group = fatherConfigGroup.SectionGroups[groupName];
if (!object.ReferenceEquals(null, group))
{
if (group.GetType().Equals(groupType))
{
return(group);
}
else
{
typeConflict = true;
group = null;
}
}
}
catch
{
typeConflict = true;
}
//根据参数创建新配置项
if (createWhenNonExist || (typeConflict && replaceWhenTypeConflict))
{
RemoveConfigUnit(fatherConfigGroup, groupName);
group = CreateInstance(groupType) as ConfigurationSectionGroup;
if (!object.ReferenceEquals(null, group))
{
fatherConfigGroup.SectionGroups.Add(groupName, group);
FillConfigurationSectionGroup(group, true);
}
}
return(group);
}
