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StringHelper.cs
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111 lines (103 loc) · 3.5 KB
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
namespace Blog.Core.Common.Helper
{
public class StringHelper
{
/// <summary>
/// 根据分隔符返回前n条数据
/// </summary>
/// <param name="content">数据内容</param>
/// <param name="separator">分隔符</param>
/// <param name="top">前n条</param>
/// <param name="isDesc">是否倒序（默认false）</param>
/// <returns></returns>
public static List<string> GetTopDataBySeparator(string content, string separator, int top, bool isDesc = false)
{
if (string.IsNullOrEmpty(content))
{
return new List<string>() { };
}
if (string.IsNullOrEmpty(separator))
{
throw new ArgumentException("message", nameof(separator));
}
var dataArray = content.Split(separator).Where(d => !string.IsNullOrEmpty(d)).ToArray();
if (isDesc)
{
Array.Reverse(dataArray);
}
if (top > 0)
{
dataArray = dataArray.Take(top).ToArray();
}
return dataArray.ToList();
}
/// <summary>
/// 根据字段拼接get参数
/// </summary>
/// <param name="dic"></param>
/// <returns></returns>
public static string GetPars(Dictionary<string, object> dic)
{
StringBuilder sb = new StringBuilder();
string urlPars = null;
bool isEnter = false;
foreach (var item in dic)
{
sb.Append($"{(isEnter ? "&" : "")}{item.Key}={item.Value}");
isEnter = true;
}
urlPars = sb.ToString();
return urlPars;
}
/// <summary>
/// 根据字段拼接get参数
/// </summary>
/// <param name="dic"></param>
/// <returns></returns>
public static string GetPars(Dictionary<string, string> dic)
{
StringBuilder sb = new StringBuilder();
string urlPars = null;
bool isEnter = false;
foreach (var item in dic)
{
sb.Append($"{(isEnter ? "&" : "")}{item.Key}={item.Value}");
isEnter = true;
}
urlPars = sb.ToString();
return urlPars;
}
/// <summary>
/// 获取一个GUID
/// </summary>
/// <param name="format">格式-默认为N</param>
/// <returns></returns>
public static string GetGUID(string format="N") {
return Guid.NewGuid().ToString(format);
}
/// <summary>
/// 根据GUID获取19位的唯一数字序列
/// </summary>
/// <returns></returns>
public static long GetGuidToLongID()
{
byte[] buffer = Guid.NewGuid().ToByteArray();
return BitConverter.ToInt64(buffer, 0);
}
/// <summary>
/// 获取字符串最后X行
/// </summary>
/// <param name="resourceStr"></param>
/// <param name="length"></param>
/// <returns></returns>
public static string GetCusLine(string resourceStr, int length) {
string[] arrStr = resourceStr.Split("\r\n");
return string.Join("", (from q in arrStr select q).Skip(arrStr.Length - length + 1).Take(length).ToArray());
}
}
}