Question

我正在处理此代码，在其中可以从列表中找到Web浏览器中的单词。我想计算出现的次数并将其插入数据库的另一列，然后再将这些单词替换为星号。有什么解决办法吗？

这是我的代码：

svchost.exe

Answer 1

一种方法是使用正则表达式进行计数和替换：

Dictionary<string,int> counts = new Dictionary<string, int>();

foreach (var word in words)
{
    var matches = Regex.Matches(html, $@"\b{word}\b", RegexOptions.IgnoreCase);
    counts.Add(word, matches.Count);
    html = Regex.Replace(html, $@"\b{word}\b", "".PadLeft(word.Length, '*'), RegexOptions.IgnoreCase);
}

foreach (var kv in counts)
{
    Console.WriteLine($"{kv.Key}:{kv.Value}");
}
Console.WriteLine(html);

Answer 2

我希望这会有所帮助。

using System;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using Xunit;
using Xunit.Abstractions;

namespace CountNumberTest
{
    public class WebBrowserReplaceHtmlFromDatabaseTest
    {
        private const string BaseAddress = "https://stackoverflow.com/questions/52572969/count-number-of-occurrence";

        private readonly ITestOutputHelper Output;
        private static readonly HttpClient StaticHttpComponent = new HttpClient
        {
            BaseAddress = new Uri(BaseAddress)
        };

        public WebBrowserReplaceHtmlFromDatabaseTest(ITestOutputHelper output)
        {
            this.Output = output;
        }

        [Fact]
        public async Task When_GetHtmlBodyFromWebPage_Then_ReplaceAllWordInHtml()
        {
            var replaceWordCollection = new[] { "html", "I", "in", "on" };
            var request = new HttpRequestMessage(HttpMethod.Get, $"{BaseAddress}");

            HttpResponseMessage response = await StaticHttpComponent.SendAsync(request);

            Assert.Equal(HttpStatusCode.OK, response.StatusCode);

            StringBuilder buffer = new StringBuilder(await response.Content.ReadAsStringAsync());

            Assert.NotEqual(0, buffer.Length);

            foreach (string word in replaceWordCollection)
            {
                int len = word.Length;

                int countOccurrence = Regex.Matches(buffer.ToString(), word).Count;
                var replaceWord = new string('*', len);

                Output.WriteLine($"{word} - occurred: {countOccurrence}");
                buffer.Replace(word, replaceWord);
            }

            string html = buffer.ToString();
            foreach (string word in replaceWordCollection)
                Assert.DoesNotContain(word, html);

            Output.WriteLine(html);
        }
    }
}

计数发生次数

2 个答案: