how to give unique id's to images?

Question

hi! how to give unique id's to images in asp.net web forms. means every image goes to images folder like. photo1,photo2,photo3......... plz give example code to do this. thanks.

Rahul Ray · Answer

Hi, Use Following code to get the unique id Guid guid = Guid .NewGuid; string uniqueId=guid .Tostring(); string fileName="originalFileName"+"_"+ uniqueId; assign to this to ur file and during fileUpload.SaveAs(); give name to it. Thanks Rahul Deb Ray

ajay raju · Answer

Hi Amit, Thanks For Helping, But Here images are not goto uniform. it goes like Photo0,Photo1,Photo3,Photo6,Photo8,Photo7.... i write Dim uniqueID As String = GenerateRandomString(StringType.Numeric, 1).ToString() Dim filename As String = "photo" & uniqueID & ".Jpg" How to solve This.

Amit Choudhary · Answer

hi friend, public enum StringType { Numeric = 1, Alpha = 2, AlphaNumeric = 3 } public static string GenerateRandomString(StringType stype, int numberOfChars) { string s = ""; string alphas = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; //if you want to add other charaters add it here - zero and O are removed to avoid confusion string alphanumeric = "1234567890ABCDEFGHIJKLMNPQRSTUVWXYZ"; Random rnd = new Random(); for (int i = 0; i { if (stype == StringType.Numeric) { s = String.Concat(s, rnd.Next(10).ToString()); } else if (stype == StringType.Alpha) { s = String.Concat(s, alphas.Substring(rnd.Next(24), 1)); } else { s = String.Concat(s, alphanumeric.Substring(rnd.Next(33), 1)); } } return s; } Pass no. character for random generated string and enumeration of the stringType define above. use following function to generate the random strings and add them to your images names while uploading in your file.SaveAs() method. Please Don't forget to mark as answer.

how to give unique id's to images?

Answers (3)