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SearchLanguage: C#
Regex Sampler
1: using System; 2: using System.Drawing; 3: using System.Collections; 4: using System.ComponentModel; 5: using System.Windows.Forms; 6: using System.Data; 7: using System.Text.RegularExpressions; 8: using System.Text; 9: using System.IO; 10: using System.Reflection; 11: 12: namespace Regex_Sample 13: { 14: /// <summary> 15: /// Summary description for Form1. 16: /// </summary> 17: public class Form1 : System.Windows.Forms.Form 18: { 19: internal System.Windows.Forms.Label lblResult; 20: internal System.Windows.Forms.Button btnValidatePhone; 21: internal System.Windows.Forms.Label lblSelectedTarget; 22: internal System.Windows.Forms.Label lblSelectedExpression; 23: internal System.Windows.Forms.ComboBox comboTarget; 24: internal System.Windows.Forms.ComboBox comboExpression; 25: internal System.Windows.Forms.TextBox txtResult; 26: internal System.Windows.Forms.Button btnFindAMatch; 27: internal System.Windows.Forms.TextBox txtTarget; 28: internal System.Windows.Forms.Label lblTarget; 29: internal TextBox txtRegex; 30: internal Label lblRegex; 31: /// <summary> 32: /// Required designer variable. 33: /// </summary> 34: private System.ComponentModel.Container components = null; 35: 36: public Form1() 37: { 38: // 39: // Required for Windows Form Designer support 40: // 41: InitializeComponent(); 42: 43: // 44: // TODO: Add any constructor code after InitializeComponent call 45: // 46: } 47: 48: /// <summary> 49: /// Clean up any resources being used. 50: /// </summary> 51: protected override void Dispose( bool disposing ) 52: { 53: if( disposing ) 54: { 55: if (components != null) 56: { 57: components.Dispose(); 58: } 59: } 60: base.Dispose( disposing ); 61: } 62: 63: #region Windows Form Designer generated code 64: /// <summary> 65: /// Required method for Designer support - do not modify 66: /// the contents of this method with the code editor. 67: /// </summary> 68: private void InitializeComponent() 69: { 70: this.lblResult = new System.Windows.Forms.Label(); 71: this.btnValidatePhone = new System.Windows.Forms.Button(); 72: this.lblSelectedTarget = new System.Windows.Forms.Label(); 73: this.lblSelectedExpression = new System.Windows.Forms.Label(); 74: this.comboTarget = new System.Windows.Forms.ComboBox(); 75: this.comboExpression = new System.Windows.Forms.ComboBox(); 76: this.txtResult = new System.Windows.Forms.TextBox(); 77: this.btnFindAMatch = new System.Windows.Forms.Button(); 78: this.txtTarget = new System.Windows.Forms.TextBox(); 79: this.lblTarget = new System.Windows.Forms.Label(); 80: this.txtRegex = new System.Windows.Forms.TextBox(); 81: this.lblRegex = new System.Windows.Forms.Label(); 82: this.SuspendLayout(); 83: // 84: // lblResult 85: // 86: this.lblResult.Location = new System.Drawing.Point(32, 331); 87: this.lblResult.Name = "lblResult"; 88: this.lblResult.Size = new System.Drawing.Size(168, 16); 89: this.lblResult.TabIndex = 25; 90: this.lblResult.Text = "Result"; 91: // 92: // btnValidatePhone 93: // 94: this.btnValidatePhone.Location = new System.Drawing.Point(592, 109); 95: this.btnValidatePhone.Name = "btnValidatePhone"; 96: this.btnValidatePhone.Size = new System.Drawing.Size(168, 23); 97: this.btnValidatePhone.TabIndex = 23; 98: this.btnValidatePhone.Text = "Validate Phone Number"; 99: this.btnValidatePhone.Click += new System.EventHandler(this.btnValidatePhone_Click); 100: // 101: // lblSelectedTarget 102: // 103: this.lblSelectedTarget.Location = new System.Drawing.Point(32, 57); 104: this.lblSelectedTarget.Name = "lblSelectedTarget"; 105: this.lblSelectedTarget.Size = new System.Drawing.Size(160, 15); 106: this.lblSelectedTarget.TabIndex = 20; 107: this.lblSelectedTarget.Text = "Selected Target:"; 108: // 109: // lblSelectedExpression 110: // 111: this.lblSelectedExpression.Location = new System.Drawing.Point(32, 16); 112: this.lblSelectedExpression.Name = "lblSelectedExpression"; 113: this.lblSelectedExpression.Size = new System.Drawing.Size(184, 15); 114: this.lblSelectedExpression.TabIndex = 19; 115: this.lblSelectedExpression.Text = "Selected Expression:"; 116: // 117: // comboTarget 118: // 119: this.comboTarget.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList; 120: this.comboTarget.Location = new System.Drawing.Point(32, 73); 121: this.comboTarget.Name = "comboTarget"; 122: this.comboTarget.Size = new System.Drawing.Size(728, 21); 123: this.comboTarget.TabIndex = 18; 124: this.comboTarget.SelectedIndexChanged += new System.EventHandler(this.comboTarget_SelectedIndexChanged); 125: // 126: // comboExpression 127: // 128: this.comboExpression.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList; 129: this.comboExpression.Location = new System.Drawing.Point(32, 32); 130: this.comboExpression.Name = "comboExpression"; 131: this.comboExpression.Size = new System.Drawing.Size(728, 21); 132: this.comboExpression.TabIndex = 17; 133: this.comboExpression.SelectedIndexChanged += new System.EventHandler(this.comboExpression_SelectedIndexChanged); 134: // 135: // txtResult 136: // 137: this.txtResult.Dock = System.Windows.Forms.DockStyle.Bottom; 138: this.txtResult.Font = new System.Drawing.Font("Courier New", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); 139: this.txtResult.Location = new System.Drawing.Point(0, 362); 140: this.txtResult.Multiline = true; 141: this.txtResult.Name = "txtResult"; 142: this.txtResult.ScrollBars = System.Windows.Forms.ScrollBars.Vertical; 143: this.txtResult.Size = new System.Drawing.Size(792, 386); 144: this.txtResult.TabIndex = 16; 145: // 146: // btnFindAMatch 147: // 148: this.btnFindAMatch.Location = new System.Drawing.Point(32, 109); 149: this.btnFindAMatch.Name = "btnFindAMatch"; 150: this.btnFindAMatch.Size = new System.Drawing.Size(168, 23); 151: this.btnFindAMatch.TabIndex = 15; 152: this.btnFindAMatch.Text = "Find A Match"; 153: this.btnFindAMatch.Click += new System.EventHandler(this.btnFindAMatch_Click); 154: // 155: // txtTarget 156: // 157: this.txtTarget.Font = new System.Drawing.Font("Courier New", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); 158: this.txtTarget.Location = new System.Drawing.Point(0, 251); 159: this.txtTarget.Multiline = true; 160: this.txtTarget.Name = "txtTarget"; 161: this.txtTarget.ScrollBars = System.Windows.Forms.ScrollBars.Vertical; 162: this.txtTarget.Size = new System.Drawing.Size(792, 68); 163: this.txtTarget.TabIndex = 26; 164: // 165: // lblTarget 166: // 167: this.lblTarget.Location = new System.Drawing.Point(29, 232); 168: this.lblTarget.Name = "lblTarget"; 169: this.lblTarget.Size = new System.Drawing.Size(168, 16); 170: this.lblTarget.TabIndex = 27; 171: this.lblTarget.Text = "Target"; 172: // 173: // txtRegex 174: // 175: this.txtRegex.Font = new System.Drawing.Font("Courier New", 10F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); 176: this.txtRegex.Location = new System.Drawing.Point(0, 166); 177: this.txtRegex.Multiline = true; 178: this.txtRegex.Name = "txtRegex"; 179: this.txtRegex.ScrollBars = System.Windows.Forms.ScrollBars.Vertical; 180: this.txtRegex.Size = new System.Drawing.Size(792, 54); 181: this.txtRegex.TabIndex = 28; 182: // 183: // lblRegex 184: // 185: this.lblRegex.Location = new System.Drawing.Point(29, 147); 186: this.lblRegex.Name = "lblRegex"; 187: this.lblRegex.Size = new System.Drawing.Size(168, 16); 188: this.lblRegex.TabIndex = 29; 189: this.lblRegex.Text = "Regular Expression"; 190: // 191: // Form1 192: // 193: this.AutoScaleBaseSize = new System.Drawing.Size(5, 13); 194: this.ClientSize = new System.Drawing.Size(792, 748); 195: this.Controls.Add(this.lblRegex); 196: this.Controls.Add(this.txtRegex); 197: this.Controls.Add(this.lblTarget); 198: this.Controls.Add(this.txtTarget); 199: this.Controls.Add(this.lblResult); 200: this.Controls.Add(this.btnValidatePhone); 201: this.Controls.Add(this.lblSelectedTarget); 202: this.Controls.Add(this.lblSelectedExpression); 203: this.Controls.Add(this.comboTarget); 204: this.Controls.Add(this.comboExpression); 205: this.Controls.Add(this.txtResult); 206: this.Controls.Add(this.btnFindAMatch); 207: this.Name = "Form1"; 208: this.Text = "Regex Sampler"; 209: this.Load += new System.EventHandler(this.Form1_Load); 210: this.ResumeLayout(false); 211: this.PerformLayout(); 212: 213: } 214: #endregion 215: 216: /// <summary> 217: /// The main entry point for the application. 218: /// </summary> 219: [STAThread] 220: static void Main() 221: { 222: Application.Run(new Form1()); 223: } 224: 225: private void Form1_Load(object sender, System.EventArgs e) 226: { 227: this.comboExpression.Items.Add(@"simple dates ::\d{1,2}/\d{1,2}"); 228: this.comboExpression.Items.Add(@"dates 1 ::\d{1,2}/((\d{4})|(\d{1,2}))"); 229: this.comboExpression.Items.Add(@"dates 2 ::\d{1,2}/\d{1,4}"); 230: this.comboExpression.Items.Add(@"dates 3 ::\d{1,2}/(\d{1,2}|\d{4})"); 231: this.comboExpression.Items.Add(@"dates 4 ::\d{1,2}/(\d{4}|\d{1,2})"); 232: this.comboExpression.Items.Add(@"dates 5 ::\s\d{1,2}/(\d{4}|\d{1,2})"); 233: this.comboExpression.Items.Add(@"dates 6 ::\s*\d{1,2}/(\d{4}|\d{1,2})"); 234: this.comboExpression.Items.Add(@"dates 7 ::\s*\d{1,2}/(\d{4}|\d{1,2})(\s|\W)"); 235: this.comboExpression.Items.Add(@"dates 8 ::(\b|\s*)\d{1,2}/(\d{4}|\d{1,2})(\s|\W|\b)"); 236: this.comboExpression.Items.Add(@"advanced date matching ::(\b|\s*)\d{1,2}/(\d{4}|\d{1,2})(\s|(\W|[^/\d])|\b)"); 237: this.comboExpression.Items.Add(@"more advanced date matching ::(\b|\s*)\d{1,2}/(\d{4}|\d{1,2})(/(\d{4}|\d{1,2}))?((\s|(\W[^/\d]))|\b){1}"); 238: this.comboExpression.Items.Add(@"matches dates with named grouping ::(\b|\s*)(?<date>\d{1,2}/(\d{4}|\d{1,2})(/(\d{4}|\d{1,2}))?)((\s|(\W[^/\d]))|\b)"); 239: 240: this.comboExpression.Items.Add(@"This is not a regular expression ::"); 241: 242: // Grabbing HTML Tags 243: this.comboExpression.Items.Add(@"matches HTML Tags :: <([A-Za-z][A-Za-z0-9]*)\b[^>]*>(.*?)</\1>"); 244: 245: // Finding comments 246: 247: // matches a single-line comment starting with a # and continuing until the end of the line 248: this.comboExpression.Items.Add(@"matches a single-line # comment :: #.*$"); 249: 250: // similar match but with // comments 251: this.comboExpression.Items.Add(@"matches a single-line // comment :: //.*$"); 252: 253: // allows whitespace between start of line and the comment. 254: this.comboExpression.Items.Add(@"allows whitespace between start of line and the # comment :: ^\s*#.*$"); 255: 256: // C-style multi-line comment if you turn on the option for the dot to match newlines 257: this.comboExpression.Items.Add(@"C-style multi-line comment :: /\*.*?\*/"); 258: 259: // Numbers 260: 261: // matches a positive integer number 262: this.comboExpression.Items.Add(@"matches a positive integer number :: \b\d+\b"); 263: 264: // matches a positive and negative integer number 265: this.comboExpression.Items.Add(@"matches a positive and negative integer number :: [-+]?\b\d+\b"); 266: 267: // matches a C-style hexadecimal number 268: this.comboExpression.Items.Add(@"matches a C-style hexadecimal number :: \b0[xX][0-9a-fA-F]+\b"); 269: 270: // Email Addresses 271: 272: // this works for 99% of the cases. 273: this.comboExpression.Items.Add(@"matches email addresses (99% accuracy) :: \b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,4}\b"); 274: 275: // There is an official standard known as RFC 2822, but it's hardly fool-proof. 276: this.comboExpression.Items.Add(@"matches email addresses (RFC 2822) :: [a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+(?:[A-Z]{2}|com|org|ne t|gov|mil|biz|info|mobi|name|aero|jobs|museum)\b"); 277: 278: // Dates 279: // matches a date in yyyy-mm-dd format from between 1900-01-01 and 2099-12-31, 280: // with a choice of four separators ('-',' ','/','.') 281: // requires the delimiters to be consistent; will match 1999-01-01 but not 1999/01-01 282: 283: this.comboExpression.Items.Add(@"matches a date in yyyy-mm-dd format from between 1900-01-01 and 2099-12-31 :: (19|20)\d\d([- /.])(0[1-9]|1[012])\2(0[1-9]|[12][0-9]|3[01])"); 284: 285: // match a date in mm/dd/yyyy format 286: this.comboExpression.Items.Add(@"match a date in mm/dd/yyyy format :: (0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)\d\d"); 287: 288: // matches phone numbers 289: this.comboExpression.Items.Add(@"matches phone numbers :: (\s|\W)*1?(\s|\W)*(?<areacode>[2-9][\d]{2})(\s|\W)*(?<prefix>[\d]{3})(\s|\W)*(?<linenumber>[\d]{4})([^\d]|\b){1}"); 290: 291: this.comboExpression.SelectedIndex = 0; 292: 293: this.comboTarget.Items.Add(@"Are these dates? /9/6/03, 08/05/03, 07/04/2003, 3/2003, 6/6, 02/04, 98/105 12/17/1770/03/26/1827"); 294: this.comboTarget.Items.Add(@"Perhaps these -dates- (07/04/1776, 7-4-1776, 5.21.2009) are more to your liking."); 295: this.comboTarget.Items.Add(@"My phone number is 18003334444 or 1-800-123-4567 or 800-555-1111 or (800)333-7777 or 18007775555 or 1 800.555.4444 or 1(800)222-3333"); 296: this.comboTarget.Items.Add(@"This is an IP address 192.168.0.1 that you may use frequently."); 297: this.comboTarget.Items.Add(@"Here are some numbers: 192 +1234 3.141 -32 98.6 -12.1 0x0ff "); 298: this.comboTarget.Items.Add(@"#### This would be a shell script comment. ####"); 299: this.comboTarget.Items.Add(@"// This would be a C# comment. // But what about this one?"); 300: this.comboTarget.Items.Add(@"This is HTML <--> <table><tr>Row 1<td>Cell 1</td></tr></table>"); 301: this.comboTarget.Items.Add(@"You can email me at johndoe@publicindustries.com (which is just an alias for jqpublic@schmoe.com). Or email me at joe@aol.com but I check that less often."); 302: 303: this.comboTarget.SelectedIndex = 0; 304: } 305: 306: private void btnFindAMatch_Click(object sender, System.EventArgs e) 307: { 308: showResult((string)txtRegex.Text, (string)txtTarget.Text); 309: } 310: 311: private void comboExpression_SelectedIndexChanged(object sender, System.EventArgs e) 312: { 313: if (comboExpression.SelectedIndex >= 0) 314: { 315: Regex rgx = new Regex(@"^.*::\s*"); 316: string thePattern = rgx.Replace((string)comboExpression.SelectedItem, ""); 317: this.txtRegex.Text = (string)thePattern; 318: } 319: } 320: 321: private void comboTarget_SelectedIndexChanged(object sender, System.EventArgs e) 322: { 323: if (comboTarget.SelectedIndex >= 0) 324: { 325: this.txtTarget.Text = (string)comboTarget.SelectedItem; 326: } 327: } 328: 329: private void showResult(string aPattern, string target) 330: { 331: StringBuilder sb = new StringBuilder(); 332: // display the result of the regular expression 333: // aPattern applied to the target string 334: if ((aPattern == null) || (aPattern == String.Empty)) 335: { 336: sb.Append("No input pattern was provided." + System.Environment.NewLine); 337: this.txtResult.Text = sb.ToString(); 338: return; 339: } 340: 341: // create a Regex object 342: Regex reg = new Regex(aPattern); 343: 344: //apply the pattern to the target 345: MatchCollection matches = reg.Matches(target); 346: 347: // display count of matches found 348: sb.Append("Found " + matches.Count + " matches: " + System.Environment.NewLine); 349: 350: //display each match 351: foreach(Match aMatch in matches) 352: { 353: if (aMatch.Groups.Count > 0) 354: { 355: if (aMatch.Groups["date"].Value != "") 356: { 357: sb.Append("Date: " + aMatch.Groups["date"].Value + System.Environment.NewLine); 358: } 359: else 360: { 361: sb.Append("Matched text: \"" + aMatch.Value + "\", " ); 362: sb.Append(new String(' ', 363: (aMatch.Value.Length < 20) ? 20 - aMatch.Value.Length : 4)); 364: sb.Append("At position: " + aMatch.Index + System.Environment.NewLine); 365: } 366: } 367: else 368: { 369: sb.Append(aMatch.Value); 370: } 371: } 372: // display final result 373: this.txtResult.Text = sb.ToString(); 374: } 375: 376: private bool isValidPhone(string phone) 377: { 378: string phoneregex = @"(\s|\W)*1?(\s|\W)*(?<areacode>[2-9][\d]{2})(\s|\W)*(?<prefix>[\d]{3})(\s|\W)*(?<linenumber>[\d]{4})([^\d]|\b){1}"; 379: 380: this.txtRegex.Text = phoneregex; 381: 382: // create a new regular expression to check the phone number 383: Regex reg = new Regex(phoneregex); 384: 385: // get the match list 386: MatchCollection matches = reg.Matches(phone); 387: 388: StringBuilder sb = new StringBuilder(); 389: 390: // are there any matches? 391: if (matches.Count == 0) 392: { 393: this.txtResult.Text = "Not a valid phone number."; 394: return false; 395: } 396: else 397: { 398: // display each match 399: foreach(Match aMatch in matches) 400: { 401: sb.Append("Matched text: \"" + aMatch.Value + "\", " + 402: new String(' ',20 - aMatch.Value.Length) + 403: "At position: " + aMatch.Index + System.Environment.NewLine); 404: 405: if (aMatch.Groups.Count > 0) 406: { 407: // show area code match 408: if (aMatch.Groups["areacode"].Value != "") 409: { 410: sb.Append("Area Code: " + aMatch.Groups["areacode"].Value + System.Environment.NewLine); 411: } 412: else 413: { 414: return false; 415: } 416: if (aMatch.Groups["prefix"].Value != "") 417: { 418: //show prefix match 419: sb.Append("Prefix: " + aMatch.Groups["prefix"].Value + 420: System.Environment.NewLine); 421: } 422: else 423: { 424: 425: return false; 426: } 427: 428: if (aMatch.Groups["linenumber"].Value != "") 429: { 430: // show line number match 431: sb.Append("Line Number: " + aMatch.Groups["linenumber"].Value + System.Environment.NewLine); 432: } 433: else 434: { 435: return false; 436: } 437: } 438: sb.Append(System.Environment.NewLine); 439: } 440: } 441: 442: // show final result 443: this.txtResult.Text = sb.ToString(); 444: return true; 445: } 446: 447: private void btnValidatePhone_Click(object sender, System.EventArgs e) 448: { 449: string phone = txtTarget.Text; 450: 451: // validate the phone number 452: if (!isValidPhone(phone)) 453: { 454: this.txtResult.Text = "Not a valid phone number."; 455: txtTarget.Focus(); 456: } 457: else 458: { 459: this.txtResult.AppendText(System.Environment.NewLine + "The phone number is valid."); 460: } 461: } 462: 463: } 464: }
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This is the source code for my Regex Sampler program used in my Regular Expressions in .NET presentation.
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