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  • C#实现隐藏手机号、邮箱、姓名等敏感信息扩展方法

    还是老惯例,直接上代码。

    最终效果图:

        public static class HideSensitiveInfoExtension
        {
            /// <summary>
            /// 隐藏敏感信息
            /// </summary>
            /// <param name="info">信息实体</param>
            /// <param name="left">左边保留的字符数</param>
            /// <param name="right">右边保留的字符数</param>
            /// <param name="basedOnLeft">当长度异常时,是否显示左边 </param>
            /// <returns></returns>
            public static string HideSensitiveInfo(this string info, int left, int right, bool basedOnLeft = true)
            {
                if (String.IsNullOrEmpty(info))
                {
                    return "";
                }
                StringBuilder sbText = new StringBuilder();
                int hiddenCharCount = info.Length - left - right;
                if (hiddenCharCount > 0)
                {
                    string prefix = info.Substring(0, left), suffix = info.Substring(info.Length - right);
                    sbText.Append(prefix);
                    for (int i = 0; i < hiddenCharCount; i++)
                    {
                        sbText.Append("*");
                    }
                    sbText.Append(suffix);
                }
                else
                {
                    if (basedOnLeft)
                    {
                        if (info.Length > left && left > 0)
                        {
                            sbText.Append(info.Substring(0, left) + "****");
                        }
                        else
                        {
                            sbText.Append(info.Substring(0, 1) + "****");
                        }
                    }
                    else
                    {
                        if (info.Length > right && right > 0)
                        {
                            sbText.Append("****" + info.Substring(info.Length - right));
                        }
                        else
                        {
                            sbText.Append("****" + info.Substring(info.Length - 1));
                        }
                    }
                }
                return sbText.ToString();
            }
    
            /// <summary>
            /// 隐藏敏感信息
            /// </summary>
            /// <param name="info">信息</param>
            /// <param name="sublen">信息总长与左子串(或右子串)的比例</param>
            /// <param name="basedOnLeft">当长度异常时,是否显示左边,默认true,默认显示左边</param>
            /// <code>true</code>显示左边,<code>false</code>显示右边
            /// <returns></returns>
            public static string HideSensitiveInfo(this string info, int sublen = 3, bool basedOnLeft = true)
            {
                if (String.IsNullOrEmpty(info))
                {
                    return "";
                }
                if (sublen <= 1)
                {
                    sublen = 3;
                }
                int subLength = info.Length / sublen;
                if (subLength > 0 && info.Length > (subLength * 2))
                {
                    string prefix = info.Substring(0, subLength), suffix = info.Substring(info.Length - subLength);
                    return prefix + "****" + suffix;
                }
                else
                {
                    if (basedOnLeft)
                    {
                        string prefix = subLength > 0 ? info.Substring(0, subLength) : info.Substring(0, 1);
                        return prefix + "****";
                    }
                    else
                    {
                        string suffix = subLength > 0 ? info.Substring(info.Length - subLength) : info.Substring(info.Length - 1);
                        return "****" + suffix;
                    }
                }
            }
    
            /// <summary>
            /// 隐藏邮件详情
            /// </summary>
            /// <param name="email">邮件地址</param>
            /// <param name="left">邮件头保留字符个数,默认值设置为3</param>
            /// <returns></returns>
            public static string HideEmailDetails(this string email, int left = 3)
            {
                if (String.IsNullOrEmpty(email))
                {
                    return "";
                }
                if (System.Text.RegularExpressions.Regex.IsMatch(email, @"w+([-+.]w+)*@w+([-.]w+)*.w+([-.]w+)*"))//如果是邮件地址
                {
                    int suffixLen = email.Length - email.LastIndexOf('@');
                    return HideSensitiveInfo(email, left, suffixLen, false);
                }
                else
                {
                    return HideSensitiveInfo(email);
                }
            }
        }
    
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  • 原文地址:https://www.cnblogs.com/zhao-yi/p/7797643.html
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