operation.cs

《Visual Basic案例开发》一书的源代码

using System;

namespace _36Hang.Xml
{
	public class Operation : Connection
	{
		public Operation(string Xml) : base(Xml) {}

		/// <summary>
		/// 获取指定路径的 Xml 节点里面子节点的个数
		/// </summary>
		/// <param name="Path">指定的 Xml 路径</param>
		/// <returns>指定的子节点的个数</returns>
		public long Count(string Path)
		{
			try
			{
				System.Xml.XmlNode objXmlNode = _XmlDocument.SelectSingleNode(Path);
				return objXmlNode.ChildNodes.Count;
			}
			catch(Exception e)
			{
				throw(e);
			}
		}

		public string Value(string Path,int Index,string Name)
		{
			try
			{
				if(_XmlDocument.SelectSingleNode(Path) == null) return null;
				if(_XmlDocument.SelectSingleNode(Path).ChildNodes[Index] == null) return null;
				bool blnExist = false;
				int i;
				for(i=0; i<_XmlDocument.SelectSingleNode(Path).ChildNodes[Index].ChildNodes.Count; i++)
				{
					if(_XmlDocument.SelectSingleNode(Path).ChildNodes[Index].ChildNodes[i].Name == Name)
					{
						blnExist = true;
						break;
					}
				}
				if(blnExist == false) return null;
				
				System.Xml.XmlNode objXmlNode = _XmlDocument.SelectSingleNode(Path);
				return objXmlNode.ChildNodes[Index].ChildNodes[i].InnerText;
			}
			catch(Exception e)
			{
				throw(e);
			}
		}
	}
}