Asp.Net Utility Functions


This article contains most useful utility function for Asp.Net WebForm as well as Asp.Net MVC project. All this method is collected from Internet sources like stackoverflow so it will be useful to many developer to find all useful method at one place.

See listed below most useful functions

1. Replace all special character in input string with '-' character

This method replace special characters using Regex function
  public static string ReplaceSpecialChar(string input)
        Regex rgx = new Regex("[^a-zA-Z0-9]");
        input = rgx.Replace(input, "-");
        return input;

2. Remove all special characters from string

This method remove all special characters and prepare new string which contains alpha numeric character along with underscore and space.
     public static string RemoveSpecialCharacters(string str)
      StringBuilder sb = new StringBuilder(); 
      for (int i = 0; i < str.Length; i++)
          if ((str[i] >= '0' && str[i]<='9')||(str[i]>='A'&&str[i]<='z'
|| (str[i] == '_' || str[i] == ' ')))
      return sb.ToString();

3. Convert Unix long timestamp to C# DateTime object

Most of system contains unix timestamp for storing date value,which is most REST API response datet as unix timestamp. So,Below method is very useful to convert timestamp to DateTime object.
public static DateTime ConvertUNIXTimeStampTODateTime(long date)
        DateTime dtDateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0,System.DateTimeKind.Utc);
        dtDateTime = dtDateTime.AddSeconds(date).ToLocalTime();
        return dtDateTime;

4. Get short description from long length string value

In real world project many times this situation arise that we need to display on first 50 or 100 charcter from long string. This method trim long string value with ellipse format to display some short description.

public static string GetShortDescription(string Description)
            string strDesc = string.Empty;
                if (Convert.ToString(Description) != string.Empty)
                    if (Description.Trim().Length > 100)
                        strDesc = Description.Trim().Substring(0, 100) + "...";
                        strDesc = Description.Trim();
            catch (Exception)
            return strDesc;

5. Convert C# DateTime to Unix long timestamp

As we require converting unix timestamp to C# DateTime,we also required to convert C# DateTime to Unix timestamp.
     public static long ConvertToUnixTimestamp(this DateTime target)
            var date = new DateTime(1970, 1, 1, 0, 0, 0, target.Kind);
            var unixTimestamp = System.Convert.ToInt64((target - date).TotalSeconds);
            return unixTimestamp;



Fill free to contribute your own some useful functions in github repository which I have publish at Asp.Net-Utility-Functions


In this article we have seen most useful common utility function for Asp.Net, I will also updating this article in coming days, so we can get all common utility functions at one place.


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