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我这里用Winform和WebForm两种为例说明怎样操作xml文档来作为配置文件进行读取操作。
1.新建一个类，命名为“SystemConfig.cs”。代码例如以下：
<span style="font-family:Microsoft YaHei;font-size:14px;">using System;
using System.Collections.Generic;
using System.Text;
using System.Xml;
using System.IO;
namespace ConfigMgrTest
{
public class SystemConfig
{
#region"基本操作函数"
/// <summary>
/// 得到程序工作文件夹
/// </summary>
/// <returns></returns>
private static string GetWorkDirectory()
{
try
{
return Path.GetDirectoryName(typeof(SystemConfig).Assembly.Location);
}
catch
{
return System.Windows.Forms.Application.StartupPath;
}
}
/// <summary>
/// 推断字符串是否为空串
/// </summary>
/// <param name="szString">目标字符串</param>
/// <returns>true:为空串;false:非空串</returns>
private static bool IsEmptyString(string szString)
{
if (szString == null)
return true;
if (szString.Trim() == string.Empty)
return true;
return false;
}
/// <summary>
/// 创建一个制定根节点名的XML文件
/// </summary>
/// <param name="szFileName">XML文件</param>
/// <param name="szRootName">根节点名</param>
/// <returns>bool</returns>
private static bool CreateXmlFile(string szFileName, string szRootName)
{
if (szFileName == null || szFileName.Trim() == "")
return false;
if (szRootName == null || szRootName.Trim() == "")
return false;
XmlDocument clsXmlDoc = new XmlDocument();
clsXmlDoc.AppendChild(clsXmlDoc.CreateXmlDeclaration("1.0", "GBK", null));
clsXmlDoc.AppendChild(clsXmlDoc.CreateNode(XmlNodeType.Element, szRootName, ""));
try
{
clsXmlDoc.Save(szFileName);
return true;
}
catch
{
return false;
}
}
/// <summary>
/// 从XML文件获取相应的XML文档对象
/// </summary>
/// <param name="szXmlFile">XML文件</param>
/// <returns>XML文档对象</returns>
private static XmlDocument GetXmlDocument(string szXmlFile)
{
if (IsEmptyString(szXmlFile))
return null;
if (!File.Exists(szXmlFile))
return null;
XmlDocument clsXmlDoc = new XmlDocument();
try
{
clsXmlDoc.Load(szXmlFile);
}
catch
{
return null;
}
return clsXmlDoc;
}
/// <summary>
/// 将XML文档对象保存为XML文件
/// </summary>
/// <param name="clsXmlDoc">XML文档对象</param>
/// <param name="szXmlFile">XML文件</param>
/// <returns>bool:保存结果</returns>
private static bool SaveXmlDocument(XmlDocument clsXmlDoc, string szXmlFile)
{
if (clsXmlDoc == null)
return false;
if (IsEmptyString(szXmlFile))
return false;
try
{
if (File.Exists(szXmlFile))
File.Delete(szXmlFile);
}
catch
{
return false;
}
try
{
clsXmlDoc.Save(szXmlFile);
}
catch
{
return false;
}
return true;
}
/// <summary>
/// 获取XPath指向的单一XML节点
/// </summary>
/// <param name="clsRootNode">XPath所在的根节点</param>
/// <param name="szXPath">XPath表达式</param>
/// <returns>XmlNode</returns>
private static XmlNode SelectXmlNode(XmlNode clsRootNode, string szXPath)
{
if (clsRootNode == null || IsEmptyString(szXPath))
return null;
try
{
return clsRootNode.SelectSingleNode(szXPath);
}
catch
{
return null;
}
}
/// <summary>
/// 获取XPath指向的XML节点集
/// </summary>
/// <param name="clsRootNode">XPath所在的根节点</param>
/// <param name="szXPath">XPath表达式</param>
/// <returns>XmlNodeList</returns>
private static XmlNodeList SelectXmlNodes(XmlNode clsRootNode, string szXPath)
{
if (clsRootNode == null || IsEmptyString(szXPath))
return null;
try
{
return clsRootNode.SelectNodes(szXPath);
}
catch
{
return null;
}
}
/// <summary>
/// 创建一个XmlNode并加入到文档
/// </summary>
/// <param name="clsParentNode">父节点</param>
/// <param name="szNodeName">结点名称</param>
/// <returns>XmlNode</returns>
private static XmlNode CreateXmlNode(XmlNode clsParentNode, string szNodeName)
{
try
{
XmlDocument clsXmlDoc = null;
if (clsParentNode.GetType() != typeof(XmlDocument))
clsXmlDoc = clsParentNode.OwnerDocument;
else
clsXmlDoc = clsParentNode as XmlDocument;
XmlNode clsXmlNode = clsXmlDoc.CreateNode(XmlNodeType.Element, szNodeName, string.Empty);
if (clsParentNode.GetType() == typeof(XmlDocument))
{
clsXmlDoc.LastChild.AppendChild(clsXmlNode);
}
else
{
clsParentNode.AppendChild(clsXmlNode);
}
return clsXmlNode;
}
catch
{
return null;
}
}
/// <summary>
/// 设置指定节点中指定属性的值
/// </summary>
/// <param name="parentNode">XML节点</param>
/// <param name="szAttrName">属性名</param>
/// <param name="szAttrValue">属性值</param>
/// <returns>bool</returns>
private static bool SetXmlAttr(XmlNode clsXmlNode, string szAttrName, string szAttrValue)
{
if (clsXmlNode == null)
return false;
if (IsEmptyString(szAttrName))
return false;
if (IsEmptyString(szAttrValue))
szAttrValue = string.Empty;
XmlAttribute clsAttrNode = clsXmlNode.Attributes.GetNamedItem(szAttrName) as XmlAttribute;
if (clsAttrNode == null)
{
XmlDocument clsXmlDoc = clsXmlNode.OwnerDocument;
if (clsXmlDoc == null)
return false;
clsAttrNode = clsXmlDoc.CreateAttribute(szAttrName);
clsXmlNode.Attributes.Append(clsAttrNode);
}
clsAttrNode.Value = szAttrValue;
return true;
}
#endregion
#region"配置文件的读取和写入"
private static string CONFIG_FILE = "SystemConfig.xml";
/// <summary>
/// 读取指定的配置文件里指定Key的值
/// </summary>
/// <param name="szKeyName">读取的Key名称</param>
/// <param name="szDefaultValue">指定的Key不存在时,返回的值</param>
/// <returns>Key值</returns>
public static int GetConfigData(string szKeyName, int nDefaultValue)
{
string szValue = GetConfigData(szKeyName, nDefaultValue.ToString());
try
{
return int.Parse(szValue);
}
catch
{
return nDefaultValue;
}
}
/// <summary>
/// 读取指定的配置文件里指定Key的值
/// </summary>
/// <param name="szKeyName">读取的Key名称</param>
/// <param name="szDefaultValue">指定的Key不存在时,返回的值</param>
/// <returns>Key值</returns>
public static float GetConfigData(string szKeyName, float fDefaultValue)
{
string szValue = GetConfigData(szKeyName, fDefaultValue.ToString());
try
{
return float.Parse(szValue);
}
catch
{
return fDefaultValue;
}
}
/// <summary>
/// 读取指定的配置文件里指定Key的值
/// </summary>
/// <param name="szKeyName">读取的Key名称</param>
/// <param name="szDefaultValue">指定的Key不存在时,返回的值</param>
/// <returns>Key值</returns>
public static bool GetConfigData(string szKeyName, bool bDefaultValue)
{
string szValue = GetConfigData(szKeyName, bDefaultValue.ToString());
try
{
return bool.Parse(szValue);
}
catch
{
return bDefaultValue;
}
}
/// <summary>
/// 读取指定的配置文件里指定Key的值
/// </summary>
/// <param name="szKeyName">读取的Key名称</param>
/// <param name="szDefaultValue">指定的Key不存在时,返回的值</param>
/// <returns>Key值</returns>
public static string GetConfigData(string szKeyName, string szDefaultValue)
{
string szConfigFile = string.Format("{0}\\{1}", GetWorkDirectory(), CONFIG_FILE);
if (!File.Exists(szConfigFile))
{
return szDefaultValue;
}
XmlDocument clsXmlDoc = GetXmlDocument(szConfigFile);
if (clsXmlDoc == null)
return szDefaultValue;
string szXPath = string.Format(".//key[@name='{0}']", szKeyName);
XmlNode clsXmlNode = SelectXmlNode(clsXmlDoc, szXPath);
if (clsXmlNode == null)
{
return szDefaultValue;
}
XmlNode clsValueAttr = clsXmlNode.Attributes.GetNamedItem("value");
if (clsValueAttr == null)
return szDefaultValue;
return clsValueAttr.Value;
}
/// <summary>
/// 保存指定Key的值到指定的配置文件里
/// </summary>
/// <param name="szKeyName">要被改动值的Key名称</param>
/// <param name="szValue">新改动的值</param>
public static bool WriteConfigData(string szKeyName, string szValue)
{
string szConfigFile = string.Format("{0}\\{1}", GetWorkDirectory(), CONFIG_FILE);
if (!File.Exists(szConfigFile))
{
if (!CreateXmlFile(szConfigFile, "SystemConfig"))
return false;
}
XmlDocument clsXmlDoc = GetXmlDocument(szConfigFile);
string szXPath = string.Format(".//key[@name='{0}']", szKeyName);
XmlNode clsXmlNode = SelectXmlNode(clsXmlDoc, szXPath);
if (clsXmlNode == null)
{
clsXmlNode = CreateXmlNode(clsXmlDoc, "key");
}
if (!SetXmlAttr(clsXmlNode, "name", szKeyName))
return false;
if (!SetXmlAttr(clsXmlNode, "value", szValue))
return false;
//
return SaveXmlDocument(clsXmlDoc, szConfigFile);
}
#endregion
}
}
</span>
2.WinForm的界面例如以下：
cs代码例如以下：
<pre name="code" class="csharp"><span style="font-family:Microsoft YaHei;font-size:14px;">using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace ConfigMgrTest
{
public partial class MainForm : Form
{
public MainForm()
{
InitializeComponent();
}
private void btnSave_Click(object sender, EventArgs e)
{
//保存
SystemConfig.WriteConfigData("UserID", this.txtUserID.Text.Trim());
SystemConfig.WriteConfigData("Password", this.txtPassword.Text.Trim());
SystemConfig.WriteConfigData("Birthday",this.textBox3.Text.Trim());
this.txtUserID.Text = null;
this.txtPassword.Text = null;
this.textBox3.Text = null;
MessageBox.Show("成功保存到配置文件" + Application.StartupPath + "SystemConfig.xml \n点击读取button进行读取!");
}
private void btnClose_Click(object sender, EventArgs e)
{
//读取
this.txtUserID.Text = SystemConfig.GetConfigData("UserID", string.Empty);
this.txtPassword.Text = SystemConfig.GetConfigData("Password", string.Empty);
this.textBox3.Text = SystemConfig.GetConfigData("Birthday", string.Empty);
}
}
}</span>
前台代码例如以下：
<span style="font-family:Microsoft YaHei;font-size:14px;"><%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="Tc.Web.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="url1:"></asp:Label>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<p>
<asp:Label ID="Label2" runat="server" Text="url2:"></asp:Label>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
</p>
<asp:Button ID="Button1" runat="server" Text="写入" onclick="Button1_Click" />
<asp:Button ID="Button2" runat="server" Text="读取" onclick="Button2_Click" />
</form>
</div>
</body>
</html>
</span><span style="font-family:Microsoft YaHei;font-size:14px;">using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Tc.Web._Code;
namespace Tc.Web
{
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button2_Click(object sender, EventArgs e)
{
//读取
this.TextBox1.Text = SystemConfig.GetConfigData("url1", string.Empty);
this.TextBox2.Text = SystemConfig.GetConfigData("url2", string.Empty);
}
protected void Button1_Click(object sender, EventArgs e)
{
//写入
SystemConfig.WriteConfigData("url1", this.TextBox1.Text.Trim());
SystemConfig.WriteConfigData("url2", this.TextBox2.Text.Trim());
this.TextBox1.Text = null;
this.TextBox2.Text = null;
}
}
}</span>
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其独特的 FOAL 语言还能够用于编程处理 XML 文档，这也是一般的 XML
编辑器所无的。
FirstObject XML Editor除了支持一般的 XML 编辑功能之外，还具有生成 XML 节点相应的 XPath 定位表达式、获取所选文字的 Unicode 代码、对 XML 代码进行自己主动缩进排版以便阅读等特殊功能。推荐各位 XML 爱好者尝试本编辑器。
并且，这是一个免费的软件，你能够一直使用它。如图所看到的：
PS：“FirstObject XML Editor”及WinForm之xml读取配置文件Demo下载地址：http://115.com/lb/5lbdzr1o4qf1
115网盘礼包码：5lbdzr1o4qf1
c#读取xml文件配置文件Winform及WebForm-Demo具体解释
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原文地址：http://www.cnblogs.com/mengfanrong/p/5211720.html
