App.Config操作
2024-09-03 00:27:10
public class ConfigUtils
{
public static string filename = System.Windows.Forms.Application.StartupPath + @"\App.config";
/// <summary>
/// 对[appSettings]节点依据Key值读取到Value值，返回字符串
/// </summary>
/// <param name="key">要读取的Key值</param>
/// <returns>返回Value值的字符串</returns>
public static string GetAppSetting(string key)
{
string value = null;
XmlDocument doc = new XmlDocument();
doc.Load(filename);
XmlNode node = doc.SelectSingleNode("//appSettings");
XmlElement element = (XmlElement)node.SelectSingleNode("//add[@key='" + key + "']");
if (element != null)
{
value = element.GetAttribute("value");
}
return value;
}
/// <summary>
/// 对[connectionStrings]节点依据name值读取到connectionString值，返回字符串
/// </summary>
/// <param name="name">要读取的name值</param>
/// <returns>返回connectionString值的字符串</returns>
public static string GetConnectionString(string name)
{
string connectionString = null;
XmlDocument doc = new XmlDocument();
doc.Load(filename);
XmlNode node = doc.SelectSingleNode("//connectionStrings");
XmlElement element = (XmlElement)node.SelectSingleNode("//add[@name='" + name + "']");
if (element != null)
{
connectionString = element.GetAttribute("connectionString");
}
return connectionString;
}
/// <summary>
/// 更新或新增[appSettings]节点的子节点值，存在则更新子节点Value,不存在则新增子节点，返回成功与否布尔值
/// </summary>
/// <param name="key">子节点Key值</param>
/// <param name="value">子节点value值</param>
/// <returns>返回成功与否布尔值</returns>
public static bool SetAppSetting(string key, string value)
{
bool isSuccess = false;
XmlDocument doc = new XmlDocument();
doc.Load(filename);
XmlNode node = doc.SelectSingleNode("//appSettings");
try
{
if (node == null)
{
//不存在则新增appSettings子节点
XmlNode root = doc.DocumentElement;
XmlElement appElement = doc.CreateElement("appSettings");
XmlElement subElement = doc.CreateElement("add");
subElement.SetAttribute("key", key);
subElement.SetAttribute("value", value);
appElement.AppendChild(subElement);
root.AppendChild(appElement);
}
else
{
XmlElement element = (XmlElement)node.SelectSingleNode("//add[@key='" + key + "']");
if (element != null)
{
//存在则更新子节点Value
element.SetAttribute("value", value);
}
else
{
//不存在则新增子节点
XmlElement subElement = doc.CreateElement("add");
subElement.SetAttribute("key", key);
subElement.SetAttribute("value", value);
node.AppendChild(subElement);
}
}
using (XmlTextWriter xmlwriter = new XmlTextWriter(filename, null))
{
xmlwriter.Formatting = Formatting.Indented;
doc.WriteTo(xmlwriter);
xmlwriter.Flush();
}
isSuccess = true;
}
catch (Exception e)
{
isSuccess = false;
}
return isSuccess;
}
/// <summary>
/// 更新或新增[connectionStrings]节点的子节点值，存在则更新子节点,不存在则新增子节点，返回成功与否布尔值
/// </summary>
/// <param name="name">子节点name值</param>
/// <param name="connectionString">子节点connectionString值</param>
/// <param name="providerName">子节点providerName值</param>
/// <returns>返回成功与否布尔值</returns>
public static bool SetConnectionString(string name, string connectionString, string providerName)
{
bool isSuccess = false;
XmlDocument doc = new XmlDocument();
doc.Load(filename);
XmlNode node = doc.SelectSingleNode("//connectionStrings");
try
{
if (node == null)
{
//不存在则新增connectionStrings子节点
XmlNode root = doc.DocumentElement;
XmlElement connElement = doc.CreateElement("connectionStrings");
XmlElement subElement = doc.CreateElement("add");
subElement.SetAttribute("name", name);
subElement.SetAttribute("connectionString", connectionString);
subElement.SetAttribute("providerName", providerName);
connElement.AppendChild(subElement);
root.AppendChild(connElement);
}
else
{
XmlElement element = (XmlElement)node.SelectSingleNode("//add[@name='" + name + "']");
if (element != null)
{
//存在则更新子节点
element.SetAttribute("connectionString", connectionString);
element.SetAttribute("providerName", providerName);
}
else
{
//不存在则新增子节点
XmlElement subElement = doc.CreateElement("add");
subElement.SetAttribute("name", name);
subElement.SetAttribute("connectionString", connectionString);
subElement.SetAttribute("providerName", providerName);
node.AppendChild(subElement);
}
}
doc.Save(filename);
isSuccess = true;
}
catch (Exception e)
{
isSuccess = false;
}
return isSuccess;
}
/// <summary>
/// 更新或新增[connectionStrings]节点的子节点值，存在则更新子节点,不存在则新增子节点，返回成功与否布尔值
/// </summary>
/// <param name="name">子节点name值</param>
/// <param name="connectionString">子节点connectionString值</param>
/// <param name="providerName">子节点providerName值</param>
/// <returns>返回成功与否布尔值</returns>
public static bool SetConnectionString(string name, string connectionString)
{
bool isSuccess = false;
XmlDocument doc = new XmlDocument();
doc.Load(filename);
XmlNode node = doc.SelectSingleNode("//connectionStrings");
try
{
if (node == null)
{
//不存在则新增connectionStrings子节点
XmlNode root = doc.DocumentElement;
XmlElement connElement = doc.CreateElement("connectionStrings");
XmlElement subElement = doc.CreateElement("add");
subElement.SetAttribute("name", name);
subElement.SetAttribute("connectionString", connectionString);
connElement.AppendChild(subElement);
root.AppendChild(connElement);
}
else
{
XmlElement element = (XmlElement)node.SelectSingleNode("//add[@name='" + name + "']");
if (element != null)
{
//存在则更新子节点
element.SetAttribute("connectionString", connectionString);
}
else
{
//不存在则新增子节点
XmlElement subElement = doc.CreateElement("add");
subElement.SetAttribute("name", name);
subElement.SetAttribute("connectionString", connectionString);
node.AppendChild(subElement);
}
}
doc.Save(filename);
isSuccess = true;
}
catch (Exception e)
{
isSuccess = false;
}
return isSuccess;
} /// <summary>
/// 删除[appSettings]节点中包含Key值的子节点，返回成功与否布尔值
/// </summary>
/// <param name="key">要删除的子节点Key值</param>
/// <returns>返回成功与否布尔值</returns>
public static bool DeleteAppSetting(string key)
{
bool isSuccess = false;
XmlDocument doc = new XmlDocument();
doc.Load(filename);
XmlNode node = doc.SelectSingleNode("//appSettings");
XmlElement element = (XmlElement)node.SelectSingleNode("//add[@key='" + key + "']");
if (element != null)
{
//存在则删除子节点
element.ParentNode.RemoveChild(element);
}
try
{
using (XmlTextWriter xmlwriter = new XmlTextWriter(filename, null))
{
xmlwriter.Formatting = Formatting.Indented;
doc.WriteTo(xmlwriter);
xmlwriter.Flush();
}
isSuccess = true;
}
catch (Exception e)
{
isSuccess = false;
}
return isSuccess;
}
/// <summary>
/// 删除[connectionStrings]节点中包含name值的子节点，返回成功与否布尔值
/// </summary>
/// <param name="name">要删除的子节点name值</param>
/// <returns>返回成功与否布尔值</returns>
public static bool DeleteConnectionString(string name)
{
bool isSuccess = false;
XmlDocument doc = new XmlDocument();
doc.Load(filename);
XmlNode node = doc.SelectSingleNode("//connectionStrings");
XmlElement element = (XmlElement)node.SelectSingleNode("//add[@name='" + name + "']");
if (element != null)
{
//存在则删除子节点
node.RemoveChild(element);
} try
{
doc.Save(filename);
isSuccess = true;
}
catch (Exception e)
{
isSuccess = false;
}
return isSuccess;
}
}
class SetConfig
{
/// <summary>
/// 对[appSettings]节点依据Key值读取到Value值
/// </summary>
/// <param name="strKey"></param>
/// <returns></returns>
public static string GetAppSettings(string strKey)
{
foreach (string key in ConfigurationManager.AppSettings)
{
if (key == strKey)
{
return ConfigurationManager.AppSettings[strKey];
}
}
return null;
}
/// <summary>
/// 更新或新增[appSettings]节点的子节点值
/// </summary>
/// <param name="newKey"></param>
/// <param name="newValue"></param>
public static void SetAppSettings(string newKey, string newValue)
{
bool isModified = false;
// 如果要更改的Key已经存在
foreach (string key in ConfigurationManager.AppSettings)
{
if (key == newKey)
{
isModified = true;
}
}
//打开 App.Config
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
// 如果连接串已存在，首先删除它
if (isModified)
{
config.AppSettings.Settings.Remove(newKey);
}
//添加新的配置到配置文件里
config.AppSettings.Settings.Add(newKey, newValue);
//保存对配置节所做的更改
config.Save(ConfigurationSaveMode.Modified);
//强制重载配置节
ConfigurationManager.RefreshSection("appSettings");
}
/// <summary>
/// 对[connectionStrings]节点依据name值读取
/// </summary>
/// <param name="strName"></param>
/// <returns></returns>
public static string GetConnectionString(string strName)
{
foreach (ConnectionStringSettings item in ConfigurationManager.ConnectionStrings)
{
if (item.Name == strName)
{
return ConfigurationManager.ConnectionStrings[strName].ConnectionString;
}
}
return null;
}
/// <summary>
/// 更新或新增[connectionStrings]节点的子节点值
/// </summary>
/// <param name="newName"></param>
/// <param name="newValue"></param>
public static void SetConnectionString(string newName, string newValue)
{
bool isModified = false;
// 如果要更改的Key已经存在
foreach (ConnectionStringSettings item in ConfigurationManager.ConnectionStrings)
{
if (item.Name == newName)
{
isModified = true;
}
}
//打开 App.Config
Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
// 如果连接串已存在，首先删除它
if (isModified)
{
config.ConnectionStrings.ConnectionStrings.Remove(newName);
}
//添加新的配置到配置文件里
ConnectionStringSettings conSetting = new ConnectionStringSettings(newName, newValue);
config.ConnectionStrings.ConnectionStrings.Add(conSetting);
//保存对配置节所做的更改
config.Save(ConfigurationSaveMode.Modified);
//强制重载配置节
ConfigurationManager.RefreshSection("connectionStrings");
} }
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