CSharp-EnvironmentHelper

环境变量帮助类,支持通过环境变量取值，支持 string,int,long,bool,

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CSharpTest.Helpers;

/// <summary>
/// 环境变量帮助类
/// </summary>
internal class EnvironmentHelper
{

    /// <summary>
    /// 获取环境变量值,不匹配通通返回指定的默认值
    /// </summary>
    /// <param name="variable">环境变量名</param>
    /// <param name="defaultValue">默认值</param>
    /// <returns></returns>
    public static string GetEnvironmentVariableValue(string variable, string defaultValue)
    {
        if (string.IsNullOrWhiteSpace(variable))
        {
            return defaultValue;
        }

        try
        {
            var value = Environment.GetEnvironmentVariable(variable);
            if (value == null)
            {
                return defaultValue;
            }

            return value;
        }
        catch (Exception ex)
        {
            Console.WriteLine($"GetEnvironmentVariableValue({variable}) 转换失败，错误信息：{ex.Message}");
            return defaultValue;
        }
    }

    /// <summary>
    /// 获取环境变量值,不匹配通通返回指定的默认值
    /// </summary>
    /// <param name="variable">环境变量名</param>
    /// <param name="defaultValue">默认值</param>
    /// <returns></returns>
    public static long GetEnvironmentVariableValue(string variable, long defaultValue)
    {
        if (string.IsNullOrWhiteSpace(variable))
        {
            return defaultValue;
        }

        try
        {
            var value = Environment.GetEnvironmentVariable(variable);
            if (value == null)
            {
                return defaultValue;
            }

            return long.Parse(value);
        }
        catch (Exception ex)
        {
            Console.WriteLine($"GetEnvironmentVariableValue({variable}) 转换失败，错误信息：{ex.Message}");
            return defaultValue;
        }
    }

    /// <summary>
    /// 获取环境变量值,不匹配通通返回指定的默认值
    /// </summary>
    /// <param name="variable">环境变量名</param>
    /// <param name="defaultValue">默认值</param>
    /// <returns></returns>
    public static int GetEnvironmentVariableValue(string variable, int defaultValue)
    {
        if (string.IsNullOrWhiteSpace(variable))
        {
            return defaultValue;
        }

        try
        {
            var value = Environment.GetEnvironmentVariable(variable);
            if (value == null)
            {
                return defaultValue;
            }

            return int.Parse(value);
        }
        catch (Exception ex)
        {
            Console.WriteLine($"GetEnvironmentVariableValue({variable}) 转换失败，错误信息：{ex.Message}");
            return defaultValue;
        }
    }

    /// <summary>
    /// 获取环境变量值,不匹配通通返回指定的默认值
    /// </summary>
    /// <param name="variable">环境变量名</param>
    /// <param name="defaultValue">默认值</param>
    /// <returns></returns>
    public static bool GetEnvironmentVariableValue(string variable, bool defaultValue)
    {
        if (string.IsNullOrWhiteSpace(variable))
        {
            return defaultValue;
        }

        try
        {
            var value = Environment.GetEnvironmentVariable(variable);
            if (value == null)
            {
                return defaultValue;
            }

            return bool.Parse(value);
        }
        catch (Exception ex)
        {
            Console.WriteLine($"GetEnvironmentVariableValue({variable}) 转换失败，错误信息：{ex.Message}");
            return defaultValue;
        }
    }

}