public class AppSettingsHelper
{
private static readonly NameValueCollection appSettings;
static AppSettingsHelper()
{
appSettings = System.Configuration.ConfigurationManager.AppSettings; ;
}
public static bool GetBoolValue(string key)
{
bool value = false;
if (appSettings[key] != null)
bool.TryParse(appSettings[key], out value);
return value;
}
public static int GetIntValue(string key)
{
int value = 0;
if (appSettings[key] != null)
int.TryParse(appSettings[key], out value);
return value;
}
#region GetString
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的字符串类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <returns>字符串</returns>
public static string GetString(string key)
{
return getValue(key, true, null);
}
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的字符串类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <param name="defaultValue">默认值</param>
/// <returns>字符串</returns>
public static string GetString(string key, string defaultValue)
{
return getValue(key, false, defaultValue);
}
#endregion
#region GetStringArray
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的string[]类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <param name="separator">分隔符</param>
/// <returns>字符串数组</returns>
public static string[] GetStringArray(string key, string separator)
{
return getStringArray(key, separator, true, null);
}
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的string[]类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <param name="separator">分隔符</param>
/// <param name="defaultValue">默认值</param>
/// <returns>字符串数组</returns>
public static string[] GetStringArray(string key, string separator, string[] defaultValue)
{
return getStringArray(key, separator, false, defaultValue);
}
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的string[]类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <param name="separator">分隔符</param>
/// <param name="valueRequired">指定配置文件中是否必须需要配置有该名称的元素，传入False则方法返回默认值，反之抛出异常</param>
/// <param name="defaultValue">默认值</param>
/// <returns>字符串数组</returns>
private static string[] getStringArray(string key, string separator, bool valueRequired, string[] defaultValue)
{
string value = getValue(key, valueRequired, null);
if (!string.IsNullOrEmpty(value))
return value.Split(new[] { separator }, StringSplitOptions.RemoveEmptyEntries);
else if (!valueRequired)
return defaultValue;
throw new ApplicationException("在配置文件的appSettings节点集合中找不到key为" + key + "的子节点，且没有指定默认值");
}
#endregion
#region GetInt32
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的Int类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <returns>Int</returns>
public static int GetInt32(string key)
{
return getInt32(key, null);
}
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的Int类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <param name="defaultValue">默认值</param>
/// <returns>Int</returns>
public static int GetInt32(string key, int defaultValue)
{
return getInt32(key, defaultValue);
}
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的Int类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <param name="defaultValue">默认值</param>
/// <returns>Int</returns>
private static int getInt32(string key, int? defaultValue)
{
return getValue<int>(key, (v, pv) => int.TryParse(v, out pv), defaultValue);
}
#endregion
#region GetBoolean
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的布尔类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <returns>布尔值</returns>
public static bool GetBoolean(string key)
{
return getBoolean(key, null);
}
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的布尔类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <param name="defaultValue">默认值</param>
/// <returns>布尔值</returns>
public static bool GetBoolean(string key, bool defaultValue)
{
return getBoolean(key, defaultValue);
}
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的布尔类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <param name="defaultValue">默认值</param>
/// <returns>布尔值</returns>
private static bool getBoolean(string key, bool? defaultValue)
{
return getValue<bool>(key, (v, pv) => bool.TryParse(v, out pv), defaultValue);
}
#endregion
#region GetTimeSpan
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的时间间隔类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <returns>时间间隔</returns>
public static TimeSpan GetTimeSpan(string key)
{
return TimeSpan.Parse(getValue(key, true, null));
}
/// <summary>
/// 获取配置文件中appSettings节点下指定索引键的时间间隔类型的的值
/// </summary>
/// <param name="key">索引键</param>
/// <param name="defaultValue">默认值</param>
/// <returns>时间间隔</returns>
public static TimeSpan GetTimeSpan(string key, TimeSpan defaultValue)
{
string val = getValue(key, false, null);
if (val == null)
return defaultValue;
return TimeSpan.Parse(val);
}
#endregion
#region Private Methods
/// <summary>
/// 获取配置文件appSettings集合中指定索引的值
/// </summary>
/// <typeparam name="T">返回值类型参数</typeparam>
/// <param name="key">索引键</param>
/// <param name="parseValue">将指定索引键的值转化为返回类型的值的委托方法</param>
/// <param name="defaultValue">默认值</param>
/// <returns></returns>
private static T getValue<T>(string key, Func<string, T, bool> parseValue, T? defaultValue) where T : struct
{
string value = appSettings[key];
if (value != null)
{
T parsedValue = default(T);
if (parseValue(value, parsedValue))
return parsedValue;
else
throw new ApplicationException(string.Format("Setting ‘{0}‘ was not a valid {1}", key, typeof(T).FullName));
}
if (!defaultValue.HasValue)
throw new ApplicationException("在配置文件的appSettings节点集合中找不到key为" + key + "的子节点，且没有指定默认值");
else
return defaultValue.Value;
}
/// <summary>
/// 获取配置文件appSettings集合中指定索引的值
/// </summary>
/// <param name="key">索引</param>
/// <param name="valueRequired">指定配置文件中是否必须需要配置有该名称的元素，传入False则方法返回默认值，反之抛出异常</param>
/// <param name="defaultValue">默认值</param>
/// <returns>字符串</returns>
private static string getValue(string key, bool valueRequired, string defaultValue)
{
string value = appSettings[key];
if (value != null)
return value;
else if (!valueRequired)
return defaultValue;
throw new ApplicationException("在配置文件的appSettings节点集合中找不到key为" + key + "的子节点");
}
#endregion
}
时间： 2024-10-13 16:34:27