C# 如何删除最后一部分？

我想把这个分开：

0, 250, 6, 5000, 10000, 15000, 20000, 25000, 70, 70, 70, 70, 70, 70, 0,

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

我试过：

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

这不是完整的代码，但问题是：它应该如下所示：

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

18 70

19 70

20 0

但看起来是这样的：

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

18 70

19 70

20 0

21 

还有一个额外的部分，因为在最后一个单词的末尾，总是有一个“，” 如何删除最后一行

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

代码：

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

 public void button1_Click(object sender, EventArgs e)
    { 
        OpenFileDialog openFileDialog1 = new OpenFileDialog();
        int size = -1;
        string text = "";

        DialogResult result = openFileDialog1.ShowDialog();
        if (result == DialogResult.OK)
        {
            file = openFileDialog1.FileName;
            try
            {
                text = File.ReadAllText(file);
                size = text.Length;
            }
            catch (IOException)
            {
            }

        }
        int a = 0;
        int b =1;
        int c = 0;
        int d = 0;
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.Load(file);
        XmlNodeList nodes = xmlDoc.SelectNodes("//Pacs_Parad//Pac_Parameter_Set//Pac_Zuo_Pave_Para");
        XmlNodeList polygon = xmlDoc.GetElementsByTagName("Polygon_CS_List");
        XmlNodeList value = xmlDoc.GetElementsByTagName("Value");
        XmlNodeList synonym = xmlDoc.GetElementsByTagName("Synonym_Name");
        XmlNodeList typeflag = xmlDoc.GetElementsByTagName("Type_Flag");
        string[] poly = new string[polygon.Count];
        foreach(XmlNode node in polygon)
        {
            poly[a] = node.InnerText;
            a++;
        }
        a = 0;
        string[] tf = new string[size];

        foreach (XmlNode node in typeflag)
        {
            tf[a] = node.InnerText;
            a++;
        }
        a = 0;

       richTextBox1.Multiline = true;
        richTextBox1.Clear();
        string[]words = null;
        char[] charseparators = new char[] { ',' };
        for (int i = 0; i <synonym.Count; i++)
        {

           richTextBox1.Text += b + "." + " Name: " + synonym[i].InnerText + "\r\n" +
                                          " Type: "  ;


                if (tf[i] == "P")
                {
                richTextBox1.Text += "Polygon  " + "\r\n";
                     words = poly[a].Split(charseparators);
                    foreach (string word in words)
                    {
                        richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
                        d++;
                    }
                    d = 0;

                    a++;
                }
                else
                {
                    if (tf[i] == "C")
                    {
                    richTextBox1.Text += "Constant  " + "\r\n";
                    richTextBox1.Text += "value: " + value[c].InnerText + "\r\n";
                            c++;

                    }

                }
            richTextBox1.Text += "\r\n";



            b++;


        }





    }

其中，使用StringSplitOptions.RemoveEmptyEntries的拆分重载将确保删除所有空数组元素

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

这取决于charseparators的类型，如果它是char数组，则重载运算符将可用。如果没有，您只需将其放入一个：

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

words = poly[a].Split(new [] { charseparators }, StringSplitOptions.RemoveEmptyEntries);

性能微调与拆分 有趣的是：

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

var str = "0, 250, 6, 5000, 10000, 15000, 20000, 25000, 70, 70, 70, 70, 70, 70, 0,";

var timer = System.Diagnostics.Stopwatch.StartNew();

for (var i = 0; i < 1000000; i++)
{
    str.Split(new[] { "," }, StringSplitOptions.RemoveEmptyEntries);
}

timer.Stop();

Console.WriteLine($"Spliting took: {timer.ElapsedMilliseconds}ms");

timer = Stopwatch.StartNew();

for (int i = 0; i < 1000000; i++)
{
    str.Trim(',').Split(',');
}

timer.Stop();

Console.WriteLine($"Trimming then Spliting took: {timer.ElapsedMilliseconds}ms");

仅在10000次以上的重复试验中可观察到结果：

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

Spliting took: 7ms
Trimming then Spliting took: 5ms

其中，使用StringSplitOptions.RemoveEmptyEntries的拆分重载将确保删除所有空数组元素

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

这取决于charseparators的类型，如果它是char数组，则重载运算符将可用。如果没有，您只需将其放入一个：

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

words = poly[a].Split(new [] { charseparators }, StringSplitOptions.RemoveEmptyEntries);

性能微调与拆分 有趣的是：

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

var str = "0, 250, 6, 5000, 10000, 15000, 20000, 25000, 70, 70, 70, 70, 70, 70, 0,";

var timer = System.Diagnostics.Stopwatch.StartNew();

for (var i = 0; i < 1000000; i++)
{
    str.Split(new[] { "," }, StringSplitOptions.RemoveEmptyEntries);
}

timer.Stop();

Console.WriteLine($"Spliting took: {timer.ElapsedMilliseconds}ms");

timer = Stopwatch.StartNew();

for (int i = 0; i < 1000000; i++)
{
    str.Trim(',').Split(',');
}

timer.Stop();

Console.WriteLine($"Trimming then Spliting took: {timer.ElapsedMilliseconds}ms");

仅在10000次以上的重复试验中可观察到结果：

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

Spliting took: 7ms
Trimming then Spliting took: 5ms

---

您可以添加此行以删除最后的to字符，即\r和\n

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

---

您可以添加此行以删除最后的to字符，即\r和\n

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

---

如果字符串中允许有空入口，则不能使用

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

words = poly[a].Split(charseparators, StringSplitOptions.RemoveEmptyEntries);` 

因为这样也会删除这些条目。我会在最后修剪分离器

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

words = poly[a].Split(charseparators.TrimEnd(','));

---

如果字符串中允许有空入口，则不能使用

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

words = poly[a].Split(charseparators, StringSplitOptions.RemoveEmptyEntries);` 

因为这样也会删除这些条目。我会在最后修剪分离器

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

words = poly[a].Split(charseparators.TrimEnd(','));

通过StringSplitOptions删除空条目。RemoveEmptyEntries:

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

要防止richTextBox1闪烁，请尝试避免

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

richTextBox1.Text += ... // <- this is a bad parctice

但一次性分配文本值，例如通过string.Join

通过StringSplitOptions删除空条目。RemoveEmptyEntries：

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

要防止richTextBox1闪烁，请尝试避免

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }

richTextBox1.Text += ... // <- this is a bad parctice

---

但是一次性分配文本值，例如通过string.Join

在拆分之前使用.RTrim'，'怎么样？它仍然不能像我想的那样工作，我仍然不明白为什么…什么不能像我想的那样工作？你还有额外的条目吗？你有没有执行过任何建议？如果是：哪一个？在哪里？我尝试了你们写的所有这些东西，我真的很感谢，但没有一个有效，是的，我还有额外的21个，但我用我的方式尝试了修剪，它工作了words=poly[a]。splitcharseparator，StringSplitOptions.RemoveEmptyEntries；对于单词{richTextBox1.Text+=d+1++word.Trim'，'+\r\n；d++中的每个字符串单词，正确的修剪方法是words=poly[a].TrimEndcharseparators.Splitcharseparators；在你的演讲之前使用.RTrim'，在分裂之前如何？它仍然不能像我想的那样工作，我仍然不明白为什么…什么不能像我想的那样工作？你仍然有额外的条目？你没有执行任何建议吗？如果是的话：哪个？在哪里？我尝试了所有这些东西你们写的东西，我真的很感谢，但没有一个有效，是的，我还有额外的21个，但我用我的方式尝试了修剪，效果很好，words=poly[a].Splitcharseparators，StringSplitOptions.RemoveEmptyEntries；对于单词{richTextBox1.Text+=d+1++word.Trim'，'+\r\n；d++；正确的修剪方法是单词=poly[a].TrimEndcharseparators.Splitcharseparators；在您的foreach之前

words = poly[a].Split(charseparators);

    foreach (string word in words)

    {
      richTextBox1.Text += (d + 1)+ " " + word+ "\r\n";
     d++;
     }