Question

我想分开这个：

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

我试过了：

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：它应该是这样的：

但它看起来像这样：

还有一个额外的部分，因为在最后一个字的末尾，总是有一个＆＃39;，＆＃39; 我怎么能删除最后一行？

代码：

 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++;


        }





    }

Answer 1

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

使用Split的{{1}}重载将确保它将删除所有空数组元素。

这取决于StringSplitOptions.RemoveEmptyEntries的类型，如果它是charseparators的数组，则重载运算符将可用。如果不是，你只需要把它放在一个：

char

性能修剪与分裂

有趣的是：

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

此测试返回结果：

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");

只有＆gt;

显着 10,000结果的结果是：

Spliting took: 810ms
Trimming then Spliting took: 570ms

Answer 2

您可以添加此行以删除\r和\n

字符的最后一行

if(words.Length > 0)
    richTextBox1.Text = richTextBox1.Text.Remove(richTextBox1.Text.Lenght - 2, 2);

Answer 3

如果您的字符串中允许空语句，则无法使用

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

因为这会删除这些条目。我会在最后修剪分离器。

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

Answer 4

通过StringSplitOptions.RemoveEmptyEntries删除空条目：

 richTextBox1.Text = string.Join(Environment.NewLine, poly[a]
    .Split(charseparators, StringSplitOptions.RemoveEmptyEntries)
    .Select((value, index) => String.Format("{0} {1}", index + 1, value.Trim())));

要阻止闪烁的richTextBox1 ，请尝试避免

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

但在一次中指定文本值（例如，通过string.Join）

如何删除最后一部分？

4 个答案:

性能修剪与分裂