【IT168 技术】在开发的过程中，我们可能会在网站的运行中对配置文件做一些修改，并且这些修改还要求实时反映出来。或许在 Web.config 中添加是一个不错的方案，但是如果配置太多的话，我想你也不想把它弄得太臃肿。那这个时候应该怎么办呢?或许我这这篇文章能够帮到你。
我现在遇到的问题是公司把网站拆分了，开发的时候每组就是每组的，但是正式线上可能还需要把其它组的配置写进去，最后因此导致的问题不胜枚举。无奈，就想到了把配置文件分开，每个组一个就不会出现这样的问题了。但是问题又来了，我怎么能在配置文件变动后，网站会自动重新提取最近的内容呢?后来从这篇文章《使用.NET FileSystemWatcher对象监控C#目录改变》得到些灵感，将这个东西做了出来。
private static XmlParser xml = null;static Default()
{ var path = HttpContext.Current.Server.MapPath(".\\TestData.xml");
xml = XmlParser.Load(path, new string[] { "orange" });
}
基本上是将配置文件的绝对路径当作参数传递进去就可以了，第二个参数是有额外用途的，这个一会儿再说。
我们需要读取这个 XML 文件的内容，预先看一下其内容：
1: <?xml version="1.0" encoding="utf-8"?> 2: <apple phone="true">
3: <items>
4: <orange id="1">
5: <name>橘子1</name>
6: </orange>
7: <orange id="o2">
8: <name>橘子2</name>
9: </orange>
10: <orange id="o3">
11: <name>橘子3</name>
12: </orange>
13: <orange id="o4">
14: <name>橘子4</name>
15: </orange>
16: </items>
17: <id>a1</id>
18: <name>苹果</name>
19: </apple>
3: <items>
4: <orange id="1">
5: <name>橘子1</name>
6: </orange>
7: <orange id="o2">
8: <name>橘子2</name>
9: </orange>
10: <orange id="o3">
11: <name>橘子3</name>
12: </orange>
13: <orange id="o4">
14: <name>橘子4</name>
15: </orange>
16: </items>
17: <id>a1</id>
18: <name>苹果</name>
19: </apple>
在写配置的时候，我们一般是将其写入到节点的 Attribute 中的，比如文件中的 orange 节点的 id 和 apple 节点的 phone 两个配置信息。除此之外，对于哪些文本特别长的 Attribute ，会考虑将其作为子节点写入，比如文件中的 name 节点，分别就是 apple 和 orange 的配置信息。
如果通过我的 XmlParser 类读取，可以统一使用 GetString 方法读取，示例如下：
1: string a = xml.GetString("name");
2: string b = xml.GetString("phone");
当然，你可以通过重载获得更大的控制权。
另外一个问题，我想获取 orange 节点如何做到？回到 Load 方法，其第二个参数是一个字符串数组，我解释一下其作用：指定 apple 节点下逐级复杂节点的 Type 。在 Load 时会把这些 Type 作为递归 XmlParser 填充当前对象的 Items 属性下。这是正统的用法，如果你有意见，请先保留，下面会有说明。
我在这里举例说明：XML 配置文件中，apple 作为根节点，下面有个 items 包含了一组 orange ，在 Load 的时候我指定了 orange 作为第一级的复杂节点，使用的时候就可以通过下面的语句进行读取：
1: var c = xml.Items[0].GetString("name"); // name = 橘子1到此，我相信你了解了第二个参数的作用。在不用递归子级的时候，可以设置第二个参数为 null 。
还有一些需求是不指定子级，在运行时动态分析。比如在 apple 节点下直接添加 orange 节点，此时如果想要获取 orange 的节点信息，你可以求助于InnerParsers 属性，该属性包含了 apple 下的所有子节点，当然也就有这个非正统的 orange 节点。顺带提一句，Items 属性中只会包含在 items 子节点下的所有符合 orange 名称的节点。orange 通过 Load 方法第二个参数指定，逐级递归时依然有效。
罗嗦一句，EqualComparer 类的说明我正在写，稍等大概半小时就可以出来了，由此导致的不便还请您谅解。最后，贴上代码，毕竟代码在程序员的世界是最清楚明了的语言：
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Xml.Linq;
using Lenic.Core;
namespace Lenic
{
/// <summary>
/// 配置文件分析方式
/// </summary>
public enum XmlParserTypes
{
/// <summary>
/// 【缺省值】自适应检索方式（分析顺序：Attriburtes、Children）
/// </summary>
Auto = 0,
/// <summary>
/// 从 Attributes 中检索
/// </summary>
Attribute = 1,
/// <summary>
/// 从 Children 中检索
/// </summary>
InnerElement = 2,
}
/// <summary>
/// 尝试从字符串中解析 T 类型, 分析成功时返回 <c>true</c> , 分析结果在 result 中.
/// </summary>
/// <typeparam name="T">待分析的目标类型.</typeparam>
/// <param name="obj">待分析的源字符串.</param>
/// <param name="result">分析完成的结果.</param>
/// <returns><c>true</c> 表示分析成功; 否则返回 <c>false</c> .</returns>
public delegate bool TryParse<T>(string obj, out T result);
/// <summary>
/// 配置文件分析基类
/// </summary>
[DebuggerStepThrough]
[DebuggerDisplay("Type = {Type}, ItemsCount = {Items.Length}")]
public class XmlParser
{
#region Fields
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private string filePath = string.Empty;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private WeakReference element = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private Dictionary<string, string> attributes = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private Dictionary<string, string> children = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private XmlParser[] items = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private string type = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private string[] path = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private XmlParser[] innerParsers = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private FileSystemWatcher fsw = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private string text = null;
#endregion
#region Properties
private XElement Element
{
get
{
if (element.IsAlive)
return element.Target as XElement;
else
throw new NullReferenceException("The current element is not effective.");
}
}
/// <summary>
/// 获取当前节点的类型.
/// </summary>
public string Type
{
get { return type; }
}
/// <summary>
/// 获取当前节点的串连文本内容.
/// </summary>
public string Text
{
get
{
if (text == null)
text = Element.Value;
return text;
}
}
/// <summary>
/// 获取包含的内层元素集合（items 节点）.
/// </summary>
[DebuggerDisplay("Length = {Items.Length}")]
public XmlParser[] Items
{
get
{
if (items == null)
{
var currPath = path.Length > 0 ? path[0] : string.Empty;
var innerPath = path.Length > 0 ? path.Skip(1) : Enumerable.Empty<string>();
items = Element.Elements()
.Where(p => p.Name.LocalName.Equals("items", StringComparison.CurrentCultureIgnoreCase))
.Elements()
.Where(p => p.Name.LocalName.Equals(currPath, StringComparison.CurrentCultureIgnoreCase))
.Select(p => new XmlParser(new WeakReference(p, true), innerPath))
.ToArray();
WeakReference wr = new WeakReference(1, true);
}
return items;
}
}
/// <summary>
/// 获取当前节点的所有属性集合.
/// </summary>
[DebuggerDisplay("Count = {Attributes.Count}")]
public Dictionary<string, string> Attributes
{
get
{
if (attributes == null)
{
attributes = new Dictionary<string, string>(new EqualComparer<string>((x, y) =>
string.Compare(x, y, StringComparison.CurrentCultureIgnoreCase) == 0));
foreach (var item in Element.Attributes())
{
if (!attributes.ContainsKey(item.Name.LocalName))
attributes.Add(item.Name.LocalName, item.Value);
}
}
return attributes;
}
}
/// <summary>
/// 获取当前节点的所有内含元素集合（不包含 items 节点）.
/// </summary>
[DebuggerDisplay("Count = {Children.Count}")]
public Dictionary<string, string> Children
{
get
{
if (children == null)
{
Func<string, bool> comparer = p => true;
if (path.Length > 0)
{
var currPath = path[0];
comparer = p => !p.Equals(currPath, StringComparison.CurrentCultureIgnoreCase);
}
children = new Dictionary<string, string>(new EqualComparer<string>((x, y) =>
string.Compare(x, y, StringComparison.CurrentCultureIgnoreCase) == 0));
foreach (var item in Element.Elements()
.Where(p => !p.Name.LocalName.Equals("items", StringComparison.CurrentCultureIgnoreCase) &&
comparer(p.Name.LocalName)))
{
if (!children.ContainsKey(item.Name.LocalName))
children.Add(item.Name.LocalName, item.Value);
}
}
return children;
}
}
/// <summary>
/// 获取当前节点的所有内含元素集合（所有节点）.
/// </summary>
[DebuggerDisplay("Length = {InnerParsers.Length}")]
public XmlParser[] InnerParsers
{
get
{
if (innerParsers == null)
{
var innerPath = path.Skip(1).ToArray();
innerParsers = Element.Elements()
.Select(p => new XmlParser(new WeakReference(p, true), innerPath))
.ToArray();
}
return innerParsers;
}
}
#endregion
#region Entrance
/// <summary>
/// 初始化新建一个 <see cref="XmlParser"/> 类的实例对象.
/// </summary>
/// <param name="filePath">文件路径.</param>
/// <param name="path">内层元素的路径.</param>
/// <returns>一个 <see cref="XmlParser"/> 类的实例对象</returns>
public static XmlParser Load(string filePath, IEnumerable<string> path)
{
return new XmlParser(filePath, path);
}
/// <summary>
/// 初始化新建一个 <see cref="XmlParser"/> 类的实例对象.
/// </summary>
/// <param name="filePath">文件路径.</param>
/// <param name="path">内层元素的路径.</param>
public XmlParser(string filePath, IEnumerable<string> path)
{
this.filePath = Path.GetFullPath(filePath);
InitInstance(new WeakReference(XDocument.Load(this.filePath).Root, true), path);
InitFileSystemWatcher();
}
private XmlParser(WeakReference element, IEnumerable<string> path)
{
InitInstance(element, path);
}
private void InitInstance(WeakReference reference, IEnumerable<string> path)
{
this.element = reference;
this.type = ((XElement)element.Target).Name.LocalName;
this.path = path == null ? new string[] { } : path.ToArray();
this.OnXmlFileChanged = () =>
{
if (items != null)
{
foreach (var item in items)
item.XmlFileChanged();
items = null;
}
if (innerParsers != null)
{
foreach (var item in innerParsers)
item.XmlFileChanged();
innerParsers = null;
}
element.Target = null;
type = null;
text = null;
attributes = null;
children = null;
if (!string.IsNullOrEmpty(filePath))
InitInstance(new WeakReference(XDocument.Load(this.filePath).Root, true), path);
};
}
private void InitFileSystemWatcher()
{
fsw = new FileSystemWatcher
{
Filter = Path.GetFileName(filePath),
IncludeSubdirectories = false,
NotifyFilter = NotifyFilters.LastWrite,
Path = Path.GetDirectoryName(filePath),
};
fsw.Changed += (sender, e) => XmlFileChanged();
fsw.EnableRaisingEvents = true;
}
#endregion
#region Events
/// <summary>
/// 在原始 XML 文件内容发生改变的时候发生
/// </summary>
public event Action OnXmlFileChanged;
/// <summary>
/// 引发 OnXmlFileChanged 事件
/// </summary>
protected void XmlFileChanged()
{
if (OnXmlFileChanged != null)
OnXmlFileChanged();
}
#endregion
#region Parse Integer
/// <summary>
/// 根据指定的条件获取属性的值（自适应在 Attribute 和 InnerElement 中寻找，缺省值为 <c>int.MinValue</c> ，并且忽略大小写）.
/// </summary>
/// <param name="name">属性名称.</param>
/// <param name="ignoreCase">如果设置为 <c>true</c> 表示忽略名称大小写检索.</param>
/// <returns>检索结果.</returns>
public int GetInteger(string name)
{
return GetInteger(name, int.MinValue, XmlParserTypes.Auto);
}
/// <summary>
/// 根据指定的条件获取属性的值（自适应在 Attribute 和 InnerElement 中寻找）.
/// </summary>
/// <param name="name">属性名称.</param>
/// <param name="defaultValue">未找到属性时返回的缺省值.</param>
/// <returns>检索结果.</returns>
public int GetInteger(string name, int defaultValue)
{
return GetInteger(name, defaultValue, XmlParserTypes.Auto);
}
/// <summary>
/// 根据指定的条件获取属性的值.
/// </summary>
/// <param name="name">属性名称.</param>
/// <param name="defaultValue">未找到属性时返回的缺省值.</param>
/// <param name="type">属性值检索方式.</param>
/// <returns>检索结果.</returns>
public int GetInteger(string name, int defaultValue, XmlParserTypes type)
{
var value = GetString(name, null, type);
if (string.IsNullOrEmpty(value))
return defaultValue;
int result = 0;
if (int.TryParse(value, out result))
return result;
return defaultValue;
}
#endregion
#region Parse T
/// <summary>
/// 根据指定的条件获取属性的值（自适应在 Attribute 和 InnerElement 中寻找，缺省值为 <c>default(T)</c> ，并且忽略大小写）.
/// </summary>
/// <typeparam name="T">待分析的类型.</typeparam>
/// <param name="name">属性名称.</param>
/// <param name="tryParse">字符串尝试分析委托.</param>
/// <returns>检索结果.</returns>
public T GetValue<T>(string name, TryParse<T> tryParse)
{
return GetValue<T>(name, tryParse, default(T), XmlParserTypes.Auto);
}
/// <summary>
/// 根据指定的条件获取属性的值（自适应在 Attribute 和 InnerElement 中寻找）.
/// </summary>
/// <typeparam name="T">待分析的类型.</typeparam>
/// <param name="name">属性名称.</param>
/// <param name="tryParse">字符串尝试分析委托.</param>
/// <param name="defaultValue">未找到属性时返回的缺省值.</param>
/// <returns>检索结果.</returns>
public T GetValue<T>(string name, TryParse<T> tryParse, T defaultValue)
{
return GetValue<T>(name, tryParse, defaultValue, XmlParserTypes.Auto);
}
/// <summary>
/// 根据指定的条件获取属性的值.
/// </summary>
/// <typeparam name="T">待分析的类型.</typeparam>
/// <param name="name">属性名称.</param>
/// <param name="tryParse">字符串尝试分析委托.</param>
/// <param name="defaultValue">未找到属性时返回的缺省值.</param>
/// <param name="type">属性值检索方式.</param>
/// <returns>检索结果.</returns>
public T GetValue<T>(string name, TryParse<T> tryParse, T defaultValue, XmlParserTypes type)
{
var value = GetString(name, null, type);
if (string.IsNullOrEmpty(value))
return defaultValue;
T result = default(T);
if (tryParse(value, out result))
return result;
return defaultValue;
}
#endregion
#region Parse String
/// <summary>
/// 根据指定的条件获取属性的值（自适应在 Attribute 和 InnerElement 中寻找，缺省值为 <c>null</c> ，并且忽略大小写）.
/// </summary>
/// <param name="name">属性名称.</param>
/// <param name="ignoreCase">如果设置为 <c>true</c> 表示忽略名称大小写检索.</param>
/// <returns>检索结果.</returns>
public string GetString(string name)
{
return GetString(name, null, XmlParserTypes.Auto);
}
/// <summary>
/// 根据指定的条件获取属性的值（自适应在 Attribute 和 InnerElement 中寻找）.
/// </summary>
/// <param name="name">属性名称.</param>
/// <param name="defaultValue">未找到属性时返回的缺省值.</param>
/// <returns>检索结果.</returns>
public string GetString(string name, string defaultValue)
{
return GetString(name, defaultValue, XmlParserTypes.Auto);
}
/// <summary>
/// 根据指定的条件获取属性的值.
/// </summary>
/// <param name="name">属性名称.</param>
/// <param name="defaultValue">未找到属性时返回的缺省值.</param>
/// <param name="type">属性值检索方式.</param>
/// <returns>检索结果.</returns>
public string GetString(string name, string defaultValue, XmlParserTypes type)
{
var target = string.Empty;
if (type == XmlParserTypes.Attribute)
Attributes.TryGetValue(name, out target);
else if (type == XmlParserTypes.InnerElement)
Children.TryGetValue(name, out target);
else if (type == XmlParserTypes.Auto)
{
if (Attributes.TryGetValue(name, out target))
return target;
else if (Children.TryGetValue(name, out target))
return target;
}
else
throw new NotSupportedException("error enum");
return target;
}
#endregion
}
}
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Xml.Linq;
using Lenic.Core;
namespace Lenic
{
/// <summary>
/// 配置文件分析方式
/// </summary>
public enum XmlParserTypes
{
/// <summary>
/// 【缺省值】自适应检索方式（分析顺序：Attriburtes、Children）
/// </summary>
Auto = 0,
/// <summary>
/// 从 Attributes 中检索
/// </summary>
Attribute = 1,
/// <summary>
/// 从 Children 中检索
/// </summary>
InnerElement = 2,
}
/// <summary>
/// 尝试从字符串中解析 T 类型, 分析成功时返回 <c>true</c> , 分析结果在 result 中.
/// </summary>
/// <typeparam name="T">待分析的目标类型.</typeparam>
/// <param name="obj">待分析的源字符串.</param>
/// <param name="result">分析完成的结果.</param>
/// <returns><c>true</c> 表示分析成功; 否则返回 <c>false</c> .</returns>
public delegate bool TryParse<T>(string obj, out T result);
/// <summary>
/// 配置文件分析基类
/// </summary>
[DebuggerStepThrough]
[DebuggerDisplay("Type = {Type}, ItemsCount = {Items.Length}")]
public class XmlParser
{
#region Fields
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private string filePath = string.Empty;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private WeakReference element = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private Dictionary<string, string> attributes = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private Dictionary<string, string> children = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private XmlParser[] items = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private string type = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private string[] path = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private XmlParser[] innerParsers = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private FileSystemWatcher fsw = null;
[DebuggerBrowsable(DebuggerBrowsableState.Never)]
private string text = null;
#endregion
#region Properties
private XElement Element
{
get
{
if (element.IsAlive)
return element.Target as XElement;
else
throw new NullReferenceException("The current element is not effective.");
}
}
/// <summary>
/// 获取当前节点的类型.
/// </summary>
public string Type
{
get { return type; }
}
/// <summary>
/// 获取当前节点的串连文本内容.
/// </summary>
public string Text
{
get
{
if (text == null)
text = Element.Value;
return text;
}
}
/// <summary>
/// 获取包含的内层元素集合（items 节点）.
/// </summary>
[DebuggerDisplay("Length = {Items.Length}")]
public XmlParser[] Items
{
get
{
if (items == null)
{
var currPath = path.Length > 0 ? path[0] : string.Empty;
var innerPath = path.Length > 0 ? path.Skip(1) : Enumerable.Empty<string>();
items = Element.Elements()
.Where(p => p.Name.LocalName.Equals("items", StringComparison.CurrentCultureIgnoreCase))
.Elements()
.Where(p => p.Name.LocalName.Equals(currPath, StringComparison.CurrentCultureIgnoreCase))
.Select(p => new XmlParser(new WeakReference(p, true), innerPath))
.ToArray();
WeakReference wr = new WeakReference(1, true);
}
return items;
}
}
/// <summary>
/// 获取当前节点的所有属性集合.
/// </summary>
[DebuggerDisplay("Count = {Attributes.Count}")]
public Dictionary<string, string> Attributes
{
get
{
if (attributes == null)
{
attributes = new Dictionary<string, string>(new EqualComparer<string>((x, y) =>
string.Compare(x, y, StringComparison.CurrentCultureIgnoreCase) == 0));
foreach (var item in Element.Attributes())
{
if (!attributes.ContainsKey(item.Name.LocalName))
attributes.Add(item.Name.LocalName, item.Value);
}
}
return attributes;
}
}
/// <summary>
/// 获取当前节点的所有内含元素集合（不包含 items 节点）.
/// </summary>
[DebuggerDisplay("Count = {Children.Count}")]
public Dictionary<string, string> Children
{
get
{
if (children == null)
{
Func<string, bool> comparer = p => true;
if (path.Length > 0)
{
var currPath = path[0];
comparer = p => !p.Equals(currPath, StringComparison.CurrentCultureIgnoreCase);
}
children = new Dictionary<string, string>(new EqualComparer<string>((x, y) =>
string.Compare(x, y, StringComparison.CurrentCultureIgnoreCase) == 0));
foreach (var item in Element.Elements()
.Where(p => !p.Name.LocalName.Equals("items", StringComparison.CurrentCultureIgnoreCase) &&
comparer(p.Name.LocalName)))
{
if (!children.ContainsKey(item.Name.LocalName))
children.Add(item.Name.LocalName, item.Value);
}
}
return children;
}
}
/// <summary>
/// 获取当前节点的所有内含元素集合（所有节点）.
/// </summary>
[DebuggerDisplay("Length = {InnerParsers.Length}")]
public XmlParser[] InnerParsers
{
get
{
if (innerParsers == null)
{
var innerPath = path.Skip(1).ToArray();
innerParsers = Element.Elements()
.Select(p => new XmlParser(new WeakReference(p, true), innerPath))
.ToArray();
}
return innerParsers;
}
}
#endregion
#region Entrance
/// <summary>
/// 初始化新建一个 <see cref="XmlParser"/> 类的实例对象.
/// </summary>
/// <param name="filePath">文件路径.</param>
/// <param name="path">内层元素的路径.</param>
/// <returns>一个 <see cref="XmlParser"/> 类的实例对象</returns>
public static XmlParser Load(string filePath, IEnumerable<string> path)
{
return new XmlParser(filePath, path);
}
/// <summary>
/// 初始化新建一个 <see cref="XmlParser"/> 类的实例对象.
/// </summary>
/// <param name="filePath">文件路径.</param>
/// <param name="path">内层元素的路径.</param>
public XmlParser(string filePath, IEnumerable<string> path)
{
this.filePath = Path.GetFullPath(filePath);
InitInstance(new WeakReference(XDocument.Load(this.filePath).Root, true), path);
InitFileSystemWatcher();
}
private XmlParser(WeakReference element, IEnumerable<string> path)
{
InitInstance(element, path);
}
private void InitInstance(WeakReference reference, IEnumerable<string> path)
{
this.element = reference;
this.type = ((XElement)element.Target).Name.LocalName;
this.path = path == null ? new string[] { } : path.ToArray();
this.OnXmlFileChanged = () =>
{
if (items != null)
{
foreach (var item in items)
item.XmlFileChanged();
items = null;
}
if (innerParsers != null)
{
foreach (var item in innerParsers)
item.XmlFileChanged();
innerParsers = null;
}
element.Target = null;
type = null;
text = null;
attributes = null;
children = null;
if (!string.IsNullOrEmpty(filePath))
InitInstance(new WeakReference(XDocument.Load(this.filePath).Root, true), path);
};
}
private void InitFileSystemWatcher()
{
fsw = new FileSystemWatcher
{
Filter = Path.GetFileName(filePath),
IncludeSubdirectories = false,
NotifyFilter = NotifyFilters.LastWrite,
Path = Path.GetDirectoryName(filePath),
};
fsw.Changed += (sender, e) => XmlFileChanged();
fsw.EnableRaisingEvents = true;
}
#endregion
#region Events
/// <summary>
/// 在原始 XML 文件内容发生改变的时候发生
/// </summary>
public event Action OnXmlFileChanged;
/// <summary>
/// 引发 OnXmlFileChanged 事件
/// </summary>
protected void XmlFileChanged()
{
if (OnXmlFileChanged != null)
OnXmlFileChanged();
}
#endregion
#region Parse Integer
/// <summary>
/// 根据指定的条件获取属性的值（自适应在 Attribute 和 InnerElement 中寻找，缺省值为 <c>int.MinValue</c> ，并且忽略大小写）.
/// </summary>
/// <param name="name">属性名称.</param>
/// <param name="ignoreCase">如果设置为 <c>true</c> 表示忽略名称大小写检索.</param>
/// <returns>检索结果.</returns>
public int GetInteger(string name)
{
return GetInteger(name, int.MinValue, XmlParserTypes.Auto);
}
/// <summary>
/// 根据指定的条件获取属性的值（自适应在 Attribute 和 InnerElement 中寻找）.
/// </summary>
/// <param name="name">属性名称.</param>
/// <param name="defaultValue">未找到属性时返回的缺省值.</param>
/// <returns>检索结果.</returns>
public int GetInteger(string name, int defaultValue)
{
return GetInteger(name, defaultValue, XmlParserTypes.Auto);
}
/// <summary>
/// 根据指定的条件获取属性的值.
/// </summary>
/// <param name="name">属性名称.</param>
/// <param name="defaultValue">未找到属性时返回的缺省值.</param>
/// <param name="type">属性值检索方式.</param>
/// <returns>检索结果.</returns>
public int GetInteger(string name, int defaultValue, XmlParserTypes type)
{
var value = GetString(name, null, type);
if (string.IsNullOrEmpty(value))
return defaultValue;
int result = 0;
if (int.TryParse(value, out result))
return result;
return defaultValue;
}
#endregion
#region Parse T
/// <summary>
/// 根据指定的条件获取属性的值（自适应在 Attribute 和 InnerElement 中寻找，缺省值为 <c>default(T)</c> ，并且忽略大小写）.
/// </summary>
/// <typeparam name="T">待分析的类型.</typeparam>
/// <param name="name">属性名称.</param>
/// <param name="tryParse">字符串尝试分析委托.</param>
/// <returns>检索结果.</returns>
public T GetValue<T>(string name, TryParse<T> tryParse)
{
return GetValue<T>(name, tryParse, default(T), XmlParserTypes.Auto);
}
/// <summary>
/// 根据指定的条件获取属性的值（自适应在 Attribute 和 InnerElement 中寻找）.
/// </summary>
/// <typeparam name="T">待分析的类型.</typeparam>
/// <param name="name">属性名称.</param>
/// <param name="tryParse">字符串尝试分析委托.</param>
/// <param name="defaultValue">未找到属性时返回的缺省值.</param>
/// <returns>检索结果.</returns>
public T GetValue<T>(string name, TryParse<T> tryParse, T defaultValue)
{
return GetValue<T>(name, tryParse, defaultValue, XmlParserTypes.Auto);
}
/// <summary>
/// 根据指定的条件获取属性的值.
/// </summary>
/// <typeparam name="T">待分析的类型.</typeparam>
/// <param name="name">属性名称.</param>
/// <param name="tryParse">字符串尝试分析委托.</param>
/// <param name="defaultValue">未找到属性时返回的缺省值.</param>
/// <param name="type">属性值检索方式.</param>
/// <returns>检索结果.</returns>
public T GetValue<T>(string name, TryParse<T> tryParse, T defaultValue, XmlParserTypes type)
{
var value = GetString(name, null, type);
if (string.IsNullOrEmpty(value))
return defaultValue;
T result = default(T);
if (tryParse(value, out result))
return result;
return defaultValue;
}
#endregion
#region Parse String
/// <summary>
/// 根据指定的条件获取属性的值（自适应在 Attribute 和 InnerElement 中寻找，缺省值为 <c>null</c> ，并且忽略大小写）.
/// </summary>
/// <param name="name">属性名称.</param>
/// <param name="ignoreCase">如果设置为 <c>true</c> 表示忽略名称大小写检索.</param>
/// <returns>检索结果.</returns>
public string GetString(string name)
{
return GetString(name, null, XmlParserTypes.Auto);
}
/// <summary>
/// 根据指定的条件获取属性的值（自适应在 Attribute 和 InnerElement 中寻找）.
/// </summary>
/// <param name="name">属性名称.</param>
/// <param name="defaultValue">未找到属性时返回的缺省值.</param>
/// <returns>检索结果.</returns>
public string GetString(string name, string defaultValue)
{
return GetString(name, defaultValue, XmlParserTypes.Auto);
}
/// <summary>
/// 根据指定的条件获取属性的值.
/// </summary>
/// <param name="name">属性名称.</param>
/// <param name="defaultValue">未找到属性时返回的缺省值.</param>
/// <param name="type">属性值检索方式.</param>
/// <returns>检索结果.</returns>
public string GetString(string name, string defaultValue, XmlParserTypes type)
{
var target = string.Empty;
if (type == XmlParserTypes.Attribute)
Attributes.TryGetValue(name, out target);
else if (type == XmlParserTypes.InnerElement)
Children.TryGetValue(name, out target);
else if (type == XmlParserTypes.Auto)
{
if (Attributes.TryGetValue(name, out target))
return target;
else if (Children.TryGetValue(name, out target))
return target;
}
else
throw new NotSupportedException("error enum");
return target;
}
#endregion
}
}
