ds8-solution-pro/ds-wms-service/DS.Module.Core/Extensions/StringExtensions.cs

using System.Globalization;
using System.Text;
using System.Text.RegularExpressions;

namespace DS.Module.Core.Extensions;

public static class StringExtensions
{

    /// <summary>
    /// sql
    /// </summary>
    /// <param name="input"></param>
    /// <returns></returns>
    public static bool IsSqlInjection(this string input)
    {
        string[] sqlCheckList = { "TRUNCATE", "INSERT", "UPDATE", "DELETE", "DROP", "--" };
        foreach (string item in sqlCheckList)
        {
            if (input.IndexOf(item, StringComparison.OrdinalIgnoreCase) >= 0)
            {
                return true;
            }
        }
        return false;
    }
    /// <summary>
    /// 以指定字符串作为分隔符将指定字符串分隔成数组
    /// </summary>
    /// <param name="value">要分割的字符串</param>
    /// <param name="strSplit">字符串类型的分隔符</param>
    /// <param name="removeEmptyEntries">是否移除数据中元素为空字符串的项</param>
    /// <returns>分割后的数据</returns>
    public static string[] Split(this string value, string strSplit, bool removeEmptyEntries = false)
    {
        value.NotNullOrEmpty(nameof(value));
        strSplit.NotNullOrEmpty(nameof(strSplit));
        return value.Split(new[] { strSplit },
            removeEmptyEntries ? StringSplitOptions.RemoveEmptyEntries : StringSplitOptions.None);
    }

    /// <summary>
    /// 将字符中拼接
    /// </summary>
    /// <param name="value"></param>
    /// <param name="left"></param>
    /// <param name="right"></param>
    /// <param name="separator"></param>
    /// <returns></returns>
    public static string StrToJoin(this string value, string left, string right, string separator = ",")
    {
        value.NotNullOrEmpty(nameof(value));
        left.NotNullOrEmpty(nameof(left));
        right.NotNullOrEmpty(nameof(right));
        StringBuilder sb = new StringBuilder();
        if (!value.IsNullOrEmpty())
        {
            foreach (var item in value.Split(separator))
            {
                sb.AppendFormat("{0}{1}{2}{3}", left, item, right, separator);
            }
        }

        return sb.ToString().TrimEnd(separator.ToCharArray());
    }

    /// <summary>
    ///把字符串转成SQL中IN
    /// </summary>
    /// <param name="value">要转换的值</param>
    /// <param name="left">左边符</param>
    /// <param name="right">右边符</param>
    /// <param name="inMiddleSeparator">in里面中间分割符:"'a','b'"</param>
    /// <param name="valueSeparator">值分割符如："a,b,c,d"</param>
    /// <returns>返回组装好的值，例如"'a','b'"</returns>
    public static string ToSqlIn(this string value, string left = "'", string right = "'",
        string inMiddleSeparator = ",",
        string valueSeparator = ",")
    {
        value.NotNullOrEmpty(nameof(value));

        StringBuilder sb = new StringBuilder();
        if (!value.IsNullOrEmpty())
        {
            foreach (var item in value.Split(valueSeparator))
            {
                sb.AppendFormat("{0}{1}{2}{3}", left, item, right, inMiddleSeparator);
            }
        }
        else
        {
            return value;
        }

        return sb.ToString().TrimEnd(inMiddleSeparator.ToCharArray());
    }

    /// <summary>
    /// 是否为空或者为null或者空格
    /// </summary>
    /// <param name="value">要判断的值</param>
    /// <returns>返回true/false</returns>
    public static bool IsNullOrWhiteSpace(this string value)
    {
        return string.IsNullOrWhiteSpace(value);
    }

    /// <summary>
    /// 是否为空或者为null
    /// </summary>
    /// <param name="value">要判断的值</param>
    /// <returns>返回true/false</returns>
    public static bool IsNullOrEmpty(this string value)
    {
        return string.IsNullOrEmpty(value);
    }

    /// <summary>
    /// 判断是否数字
    /// </summary>
    /// <param name="value"></param>
    /// <returns></returns>
    public static bool IsInt(this string value)
    {
        return Regex.IsMatch(value, @"^[0-9]*$");
    }

    /// <summary>
    /// 在指定的输入字符串中搜索指定的正则表达式的第一个匹配项
    /// </summary>
    /// <param name="value">要搜索匹配项的字符串</param>
    /// <param name="pattern">要匹配的正则表达式模式</param>
    /// <returns>一个对象，包含有关匹配项的信息</returns>
    public static string Match(this string value, string pattern)
    {
        if (value == null)
        {
            return null;
        }

        return Regex.Match(value, pattern).Value;
    }

    public static string FormatWith(this string format, params object[] args)
    {
        format.NotNull("format");
        return string.Format(CultureInfo.CurrentCulture, format, args);
    }

    /// <summary>
    /// 将驼峰字符串的第一个字符小写
    /// </summary>
    public static string LowerFirstChar(this string str)
    {
        if (string.IsNullOrEmpty(str) || !char.IsUpper(str[0]))
        {
            return str;
        }

        if (str.Length == 1)
        {
            return char.ToLower(str[0]).ToString();
        }

        return char.ToLower(str[0]) + str.Substring(1, str.Length - 1);
    }
}