C# : String utility code snippets
Below are the common utilities / code snippets often required while working with strings. I have written them as static functions. [C# 3.0]
StripHtml
C# function to strip Html tags / markups from input string. Rather, it not only strips Html tags but any sort of markups written in <xxx> format. Reference to System.Text.RegularExpressions namespace needed.
1: /// <summary>
2: /// Removes HTML tags / markups from original string and returns it
3: /// </summary>
4: /// <param name="original"></param>
5: /// <returns></returns>
6: public static string StripHtml(string original)
7: {
8: return Regex.Replace(original, @"<(.|n)*?>", string.Empty);
9: }
Removes extra spaces
Below code removes all extra spaces (wherever there is more then one space)
1: public static string RemoveExtraSpaces(string original)
2: {
3: while (original.IndexOf(" ") > 0)
4: {
5: original = original.Replace(" ", " ");
6: }
7: return original;
8: }
Valid Email ID & URL check
Below are the C# functions to check if input string is valid email id or a valid URL. Reference to System.Text.RegularExpressions namespace needed.
1: public static bool IsValidEMailID(string email)
2: {
3: return Regex.IsMatch(email, @"w+([-+.']w+)*@w+([-.]w+)*.w+([-.]w+)*");
4: }
5:
6:
7: public static bool IsValidUrl(string url)
8: {
9: return Regex.IsMatch(url, @"http(s)?://([w-]+.)+[w-]+(/[w- ./?%&=]*)?");
10: }
If Null Then Empty
1: public static string IfNullThenEmpty(string inStr)
2: {
3: return inStr ?? string.Empty;
4: }