remove illegal character from a string

Question

Hi, I want to remove the invalid or illegal character form a string in c#, kindly help me out Thank you,

Mukesh Kumar · Answer

Hi, There are different ways to do this.. Here you can use regular expressions in C#. Using regular expressions with C# : using System . Text . RegularExpressions ; string your_String = "Hello@Hello&Hello(Hello)" ; string my_String = Regex . Replace ( your_String , @"[^0-9a-zA-Z]+" , "," ); or public static string RemoveSpecialCharacters ( string str ) { StringBuilder sb = new StringBuilder (); foreach ( char c in str ) { if (( c >= '0' && c '9' ) || ( c >= 'A' && c 'Z' ) || ( c >= 'a' && c 'z' ) || c == '.' || c == '_' ) { sb . Append ( c ); } } return sb . ToString (); } You can also find long discussion here. http://forums.asp.net/t/61673.aspx?Remove+characters+from+a+string+to+be+used+as+a+file+name Hope this will help you. thanks

praveen kumar · Answer

Hi, DirectoryInfo d = new DirectoryInfo(@"D:	est"); FileInfo[] infos = d.GetFiles(); foreach (FileInfo f in infos) File.Move(f.FullName, Path.Combine(f.DirectoryName, "N " + label3.Text + "-" + label4.Text + " " + "9187" + " " + "0000" + " " + "00" + " " + textBox5.Text + textBox2.Text + " " + ".doc")); // System.IO.File.Move(textBox3.Text,path); MessageBox.Show("Done"); } textbox5 value converted to string but again showing the error kindly help me out

Nishant Mittal · Answer

Hi, try this.. public string RemoveInvalidChars(string whatever) { Regex removeChar = new Regex(@"[\/:*?"" |]"); string myString = removeChar.Replace(whatever, ""); return myString; }

remove illegal character from a string

Answers (3)