Question

我一直在编码这个小项目。问题是文本框中有不止一个，并且只添加了一次“ a”。我不明白为什么？你们推荐我更改我的代码吗？

if (textBox3.Text.Contains("LKFKEOFK"))
{
    textBox4.AppendText("a");
}

Answer 1

   int i = 0;
   while ((i = textBox3.Text.IndexOf("LKFKE0FK", i, StringComparison.CurrentCulture)) != -1)
   {
       i += "LKFKE0FK".Length;
       textBox4.AppendText("a");
   }

编辑：

        List<Tuple<int, string>> tupleList = new List<Tuple<int, string>>();

        int i = 0;
        while ((i = textBox3.Text.IndexOf("LKFKE0FK", i, StringComparison.CurrentCulture)) != -1)
        {
            i += "LKFKE0FK".Length;
            tupleList.Add(new Tuple<int, string>(i, "a"));
        }

        int j = 0;
        while ((j = textBox3.Text.IndexOf("LDMWICB", j, StringComparison.CurrentCulture)) != -1)
        {
            j += "LDMWICB".Length;
            tupleList.Add(new Tuple<int, string>(j, "b"));
        }

        tupleList.Sort();

        for (int k = 0; k < tupleList.Count; k++)
        {
            textBox4.AppendText(tupleList.ElementAt(k).Item2);
        }

Answer 2

textBox4.AppendText(new string('a', Regex.Matches(textBox3.Text, "LKFKEOFK").Count));

或者，如果您想为每次运行添加一个完整的字符串

textBox4.AppendText(string.Concat(Enumerable.Repeat("ab", Regex.Matches(textBox3.Text, "LKFKEOFK").Count)));

要求您的LKFKEOFK不包含任何RegEx relevant characters

。仅包含1个包含项

2 个答案: