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System.Random class reliability Messages   Related Types This message was discovered on ASPFriends.com 'aspngfw' list. Responses highlighted in red are from those people who are likely to be able to contribute good, authoratitive information to this discussion. They include Microsoft employees, MVP's and others who IMHO contribute well to these kinds of discussions. Thunder Bird -- This message, which was originally sent to "aspngarchitecture", has been moved to "aspngfw" mailing list by the List Master --I'm using System.Random class to generate ID-s for my cutomers.I aslo use seeds while creating them to assure that all the ID-s generated are unique.Is there a possibility that aspng creators will change System.Random class random number generating system so that if I use the following sentence:int ID = (new System.Random(234)).Next(100000, 999999);in later years I will get different value to ID than I get it now.Please help me with this question, I can't really continue building my web application until I have got a confident answere to this.I could aslo use GUID (global identifier) but it is too long for purposes I use it for. Users wouldn't trouble to type that complex ID in.With best hopes and wishesPriit Raag-- everyday.com -- Reply to this message...        Scott (VIP) If this is a high concern, there are plenty of open-source random algorithms. You could simply roll-your-own pseudo-random number generator. Scott Swigart 3 Leaf Solutions LLC www.3leafsolutions.com 503-281-9681 -----Original Message----- From: Thunder Bird" <Click here to reveal e-mail address> [mailto:Click here to reveal e-mail address] Sent: Saturday, August 25, 2001 2:01 AM To: aspngfw Subject: [aspngfw] System.Random class reliability -- This message, which was originally sent to "aspngarchitecture", has been moved to "aspngfw" mailing list by the List Master -- I'm using System.Random class to generate ID-s for my cutomers. I aslo use seeds while creating them to assure that all the ID-s generated are unique. Is there a possibility that aspng creators will change System.Random class random number generating system so that if I use the following sentence: int ID =3D (new System.Random(234)).Next(100000, 999999); in later years I will get different value to ID than I get it now. Please help me with this question, I can't really continue building my web application until I have got a confident answere to this. I could aslo use GUID (global identifier) but it is too long for purposes I use it for. Users wouldn't trouble to type that complex ID in. With best hopes and wishes Priit Raag -- everyday.com -- | [aspngfw] member Click here to reveal e-mail address =3D YOUR ID=20 | http://www.asplists.com/asplists/aspngfw.asp =3D JOIN/QUIT=20 | http://www.asplists.com/search =3D SEARCH Archives Reply to this message...        Scott (VIP) One other thought. Guid's wouldn't help you if you need to "randomly" generate the same number. You will never get the same GUID twice, no matter what you do. -----Original Message----- From: Scott=20 Sent: Saturday, August 25, 2001 9:53 AM To: aspngfw Subject: [aspngfw] RE: System.Random class reliability If this is a high concern, there are plenty of open-source random algorithms. You could simply roll-your-own pseudo-random number generator. Scott Swigart 3 Leaf Solutions LLC www.3leafsolutions.com 503-281-9681 -----Original Message----- From: Thunder Bird" <Click here to reveal e-mail address> [mailto:Click here to reveal e-mail address] Sent: Saturday, August 25, 2001 2:01 AM To: aspngfw Subject: [aspngfw] System.Random class reliability -- This message, which was originally sent to "aspngarchitecture", has been moved to "aspngfw" mailing list by the List Master -- I'm using System.Random class to generate ID-s for my cutomers. I aslo use seeds while creating them to assure that all the ID-s generated are unique. Is there a possibility that aspng creators will change System.Random class random number generating system so that if I use the following sentence: int ID =3D (new System.Random(234)).Next(100000, 999999); in later years I will get different value to ID than I get it now. Please help me with this question, I can't really continue building my web application until I have got a confident answere to this. I could aslo use GUID (global identifier) but it is too long for purposes I use it for. Users wouldn't trouble to type that complex ID in. With best hopes and wishes Priit Raag -- everyday.com -- | [aspngfw] member Click here to reveal e-mail address =3D YOUR ID | http://www.asplists.com/asplists/aspngfw.asp =3D JOIN/QUIT=20 | http://www.asplists.com/search =3D SEARCH Archives | [aspngfw] member Click here to reveal e-mail address =3D YOUR ID | http://www.asplists.com/asplists/aspngfw.asp =3D JOIN/QUIT | http://www.asplists.com/search =3D SEARCH Archives Reply to this message...        Steven A Smith (VIP) To reliably get the same number over and over, I would think that a hash would be more appropriate. Look into the cryptography namespace to see how you can generate a hashcode given a value. This will always be the same for a given value (assuming you stick with the same algorithm - .NET supports two out of the box, I think). Steve ----- Original Message ----- From: "Scott" <Click here to reveal e-mail address> To: "aspngfw" <Click here to reveal e-mail address> Sent: Saturday, August 25, 2001 1:02 PM Subject: [aspngfw] RE: System.Random class reliability One other thought. Guid's wouldn't help you if you need to "randomly" generate the same number. You will never get the same GUID twice, no matter what you do. -----Original Message----- From: Scott Sent: Saturday, August 25, 2001 9:53 AM To: aspngfw Subject: [aspngfw] RE: System.Random class reliability If this is a high concern, there are plenty of open-source random algorithms. You could simply roll-your-own pseudo-random number generator. Scott Swigart 3 Leaf Solutions LLC www.3leafsolutions.com 503-281-9681 -----Original Message----- From: Thunder Bird" <Click here to reveal e-mail address> [mailto:Click here to reveal e-mail address] Sent: Saturday, August 25, 2001 2:01 AM To: aspngfw Subject: [aspngfw] System.Random class reliability -- This message, which was originally sent to "aspngarchitecture", has been moved to "aspngfw" mailing list by the List Master -- I'm using System.Random class to generate ID-s for my cutomers. I aslo use seeds while creating them to assure that all the ID-s generated are unique. Is there a possibility that aspng creators will change System.Random class random number generating system so that if I use the following sentence: int ID = (new System.Random(234)).Next(100000, 999999); in later years I will get different value to ID than I get it now. Please help me with this question, I can't really continue building my web application until I have got a confident answere to this. I could aslo use GUID (global identifier) but it is too long for purposes I use it for. Users wouldn't trouble to type that complex ID in. With best hopes and wishes Priit Raag -- everyday.com -- | [aspngfw] member Click here to reveal e-mail address = YOUR ID | http://www.asplists.com/asplists/aspngfw.asp = JOIN/QUIT | http://www.asplists.com/search = SEARCH Archives | [aspngfw] member Click here to reveal e-mail address = YOUR ID | http://www.asplists.com/asplists/aspngfw.asp = JOIN/QUIT | http://www.asplists.com/search = SEARCH Archives | [aspngfw] member Click here to reveal e-mail address = YOUR ID | http://www.asplists.com/asplists/aspngfw.asp = JOIN/QUIT | http://www.asplists.com/search = SEARCH Archives Reply to this message...     System.Random Ad MBR BootFX Best-of-breed application framework for .NET projects, developed by Matthew Baxter-Reynolds and MBR IT

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