正则表达式测试器

程序源自:<<C#字符串和正则表达式参考手册>>

这个例子程序很实用,可以把这个程序做为一个小工具来使用,很方便

以下是这个程序的界面.

以下是核心代码:

  1 using System;
  2 using System.Collections.Generic;
  3 using System.ComponentModel;
  4 using System.Data;
  5 using System.Drawing;
  6 using System.Linq;
  7 using System.Text;
  8 using System.Windows.Forms;
  9 using System.IO;
 10 using System.Text.RegularExpressions;
 11 
 12 namespace RegexTester
 13 {
 14     public partial class RegexTesterForm : Form
 15     {
 16         public RegexTesterForm()
 17         {
 18             InitializeComponent();
 19         }
 20 
 21         #region 打开与存储正则表达式
 22 
 23         private void SaveRegexButton_Click(object sender, EventArgs e)
 24         {
 25             saveFileDialog1.ShowDialog();
 26         }
 27 
 28         private void saveFileDialog1_FileOk(object sender, CancelEventArgs e)
 29         {
 30             StreamWriter swRegex = File.CreateText(saveFileDialog1.FileName);
 31             swRegex.Write(this.RegexTextBox.Text);
 32             swRegex.Close();
 33         }
 34 
 35         private void OpenRegexButton_Click(object sender, EventArgs e)
 36         {
 37             openFileDialog1.ShowDialog();
 38         }
 39 
 40         private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
 41         {
 42             StreamReader srRegex = File.OpenText(openFileDialog1.FileName);
 43             this.RegexTextBox.Text = srRegex.ReadToEnd();
 44             srRegex.Close();
 45         }
 46 
 47         #endregion
 48 
 49         /// <summary>
 50         /// 得到正则表达式选项
 51         /// </summary>
 52         /// <returns>返回正则表达式选项</returns>
 53         private RegexOptions GetSelectedRegexOptions()
 54         {
 55             RegexOptions selectedRegexOption = RegexOptions.None;
 56             if (this.IgnoreCaseCheckBox .Checked )
 57             {
 58                 selectedRegexOption |=RegexOptions .IgnoreCase ;
 59             }
 60             if (this.ExplicitCaptureCheckBox  .Checked )
 61             {
 62                 selectedRegexOption |=RegexOptions.ExplicitCapture  ;
 63             }
 64             if (this.ECMAScriptCheckBox .Checked )
 65             {
 66                 selectedRegexOption |= RegexOptions.ECMAScript ;
 67             }
 68             if (this.IgnorePatternWhiteSpaceCheckBox .Checked)
 69             {
 70                 selectedRegexOption |= RegexOptions.IgnorePatternWhitespace ;
 71             }
 72             if (this.MultiLineCheckBox .Checked)
 73             {
 74                 selectedRegexOption |= RegexOptions.Multiline;
 75             }
 76 
 77             if (this.RightToLeftCheckBox.Checked)
 78             {
 79                 selectedRegexOption |= RegexOptions.RightToLeft ;
 80             }
 81             if (this.SingleLineCheckBox .Checked)
 82             {
 83                 selectedRegexOption |= RegexOptions.Singleline ;
 84             }
 85 
 86             return selectedRegexOption;
 87 
 88         }
 89 
 90         private void TestRegexButton_Click(object sender, EventArgs e)
 91         {
 92             try
 93             {
 94                 RegexOptions selectedRegexOptions =
 95                     this.GetSelectedRegexOptions();
 96                 Regex testRegex = new Regex(this.RegexTextBox.Text, selectedRegexOptions);
 97                 if (testRegex .IsMatch (this.InputTextBox .Text ))
 98                 {
 99                     this.ResultsTextBox.ForeColor = Color.Black;
100                     this.ResultsTextBox.Text = "字符串与正则表达式有匹配项！";
101                 }
102                 else
103                 {
104                     this.ResultsTextBox.ForeColor = Color.Red;
105                     this.ResultsTextBox.Text = "字符串与正则表达式无匹配项！";
106                 }
107             }
108             catch (ArgumentException ex )
109             {
110                 this.ResultsTextBox.ForeColor = Color.Red;
111                 this.ResultsTextBox.Text = "There waw an error in your Regular Expression:\r\n"
112                     + ex.Message;
113                 
114             }
115         }
116 
117         private void ReplaceButton_Click(object sender, EventArgs e)
118         {
119             try
120             {
121                 RegexOptions selectedRegexOption = this.GetSelectedRegexOptions();
122                 Regex replaceRegex = new Regex(this.RegexTextBox.Text, selectedRegexOption);
123                 this.RegexTextBox.ForeColor = Color.Black;
124                 this.ResultsTextBox.Text = replaceRegex.Replace(
125                     this.InputTextBox.Text, this.ReplacementTextBox.Text);
126  
127             }
128             catch (ArgumentException ex )
129             {
130                 this.ResultsTextBox.ForeColor = Color.Red;
131                 this.ResultsTextBox.Text = "There is an error in"
132                     + "your regular expression" + ex.Message;
133             }
134         }
135 
136         private void SpiltButton_Click(object sender, EventArgs e)
137         {
138             try
139             {
140                             RegexOptions selectedRegexOption = this.GetSelectedRegexOptions();
141             Regex spiltRegex = new Regex(this.RegexTextBox.Text, selectedRegexOption);
142 
143             string[] spiltResults;
144             spiltResults = spiltRegex.Split(
145                 this.InputTextBox.Text);
146             StringBuilder resultsString = new StringBuilder(this.InputTextBox.Text.Length);
147             foreach (string item in spiltResults )
148             {
149                 resultsString.Append(item + Environment.NewLine);
150             }
151             this.ResultsTextBox.Text = resultsString.ToString();
152             }
153             catch (ArgumentException ex )
154             {
155                 this.ResultsTextBox.ForeColor = Color.Red;
156                 this.ResultsTextBox.Text = "There is an error in "
157                     + "this regular expression\r\n" + ex.Message;
158             }
159         }
160 
161         private void MatchesButton_Click(object sender, EventArgs e)
162         {
163             try
164             {
165                 RegexOptions selectedRegexOption = this.GetSelectedRegexOptions();
166                 Regex matchRegex = new Regex(this.RegexTextBox.Text, selectedRegexOption);
167 
168                 MatchCollection matchesFound;
169 
170                 matchesFound = matchRegex.Matches(this.InputTextBox.Text);
171                 string NextMatch = "-------------NEXT MATCH------------\r\n";
172                 StringBuilder resultString = new StringBuilder(64);
173 
174                 foreach (Match  item in matchesFound )
175                 {
176                     resultString.Append(item.Value + Environment.NewLine + NextMatch);
177                 }
178                 this.ResultsTextBox.Text = resultString.ToString();
179             }
180             catch (ArgumentException ex)
181             {
182                 this.ResultsTextBox.ForeColor = Color.Red;
183                 this.ResultsTextBox.Text = "There is an error in"
184                     + "your regular expression" + ex.Message;
185             }
186         }
187     }
188 }
189 

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