How To System.Guid.NewGuid () Generate Unique Values
Apr 4, 2011How does System.Guid.NewGuid() know that the values it generates are unique, for example when i use in a loop?Does it internally store data somewhere? .
View 1 RepliesHow does System.Guid.NewGuid() know that the values it generates are unique, for example when i use in a loop?Does it internally store data somewhere? .
View 1 RepliesHow to get Unique ID of LDAP logged in User? Is GUID is the unique id of each user?
View 1 RepliesIs GUID (globally unique identifier) really unique, or it can be duplicate.
System.Guid.NewGuid().ToString()
I am attempting to use SqlBulkCopy to import data from an XML document. I receive the following error when executing WriteToServer: Invalid cast from 'System.String' to 'System.Guid'
View 1 Replies[Code]....
System.InvalidCastException was unhandled by user code
Message=Unable to cast object of type 'System.Guid' to type 'System.String'.
Source=System.Data.Linq
System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.Execut
I have a webpage Default.aspx which generate the id for each new user after that the id will be subbmitted to database on button click on Default.aspx...
if onother user is also entering the same time the id will be the same ... till they press button on default.aspx
How to get rid of this issue...so that ... each user will be alloted the unique id ...
i m using the read write code to generate unique id ..
I need to generate 8 digit unique id in c#. On my site a user will register and I need to generate a unique id for him in c# code(I don't want this logic in DB), after inserting the id I need to save it in database.
Edit: I need that numbers to be generated in random manner everytime.
want to generate a url somthing like this
Ex: [URL]
now on the above url you can see after .aspx page they have added /1??Modal+Popup#
this subject line as a url
i know there is a tech of url rewriting , i also search more on net also but not getting any simple way to simple code
can any one asist me, i dnt want that ISAPI re-write and all that coz i need to install this with IIS
i want to automatically generate a unique string as orderID. I dont want to use Guid, it is not user frindly, and i dont want to use indexer either. any build-in datatype i can use?
View 11 RepliesI have to generate a unique customer code like this-
'cbd'+first letter of customer name+incrementer
here
cbd is hard coded means reamain fixed in each customer code first letter of cust_name is like
Bell Companies- B
and incrementer must be four digit number like 0001,0002,0888 etc.
Here incrementer
should start with 0001 for each customer means for EX-
BELL COMPANIES - CBDB0001
then it should increment for customers having name started with B
TEL POWERS- CBDT0001
then it should increment for customers having name started with T
How can I generate unique numbers in JQuery? I use the unique numbers for the Shopping Cart ID.
View 6 RepliesHow do I generate a unique number in c# without the database? (max 17 digits). EDIT: digits only.
View 2 RepliesI'm trying to insert userid that is a System.Guid into an additional table into the same userid field that is uniqueidentifier. It seems as it cannot insert the System.Guid type there wether I'm passing it directly as the System.Guid or as a String then converting.
<System.ComponentModel.DataObjectMethodAttribute _
(System.ComponentModel.DataObjectMethodType.Insert, True)> _
Public Function InsertUserInterests( _
ByVal strUserId As String, ByVal strCode As String) _
As Boolean
Dim userInter As New DS1.tblUserInterestsDataTable
Dim userInterRow As DS1.tblUserInterestsRow = userInter.NewtblUserInterestsRow
Dim ug As System.Guid = New Guid(strUserId)
userInterRow.UserId = ug ' This didn't go through I beleive
userInterRow.InterestCode = strCode
userInter.AddtblUserInterestsRow(userInterRow)
Dim rowsAffected As Integer = Adapter.Update(userInter)
Return rowsAffected = 1
End Function
[Code]....
Column UserId = uniqueidentifier
Compilation Error
Description:
An error occurred during the compilation of a resource required to service
this request. Please review the following specific error details and modify your
source code appropriately. Compiler Error Message: CS0019:
Operator '==' cannot be applied to operands of type 'string' and
'System.Guid'Source Error:
[Code]....
Line 93:
Line 94: var creditcard = from c in db.tbl_Payments
Line 95: where UserID == c.UserId
Line 96: select c;
Line 97:
I want to generate a unique random number everytime a user submits a form. As the form is submited the data of the form should be placed in a database and a unique random number should be generated so that the user can later use this unique random number to reterieve his details from the database that refer to his unique random id. The unique random number should be atleast 9 digits long.
View 5 RepliesI have an ID field where I need to insert unique ID's
the ID should be like -
S- (YY)(MM)9999. where, (YY) is year, (MM) is month and 9999(is a four digit random number)
for example - S-11030001
I want to know which code or technique is used to write the code written below in url which is "3rhgf6v4zbos16x" what is this and how it can be generated in asp.net?
[URL]...
I want to generate a unique random number everytime a user submits a form. As the form is submited the data of the form should be placed in a database and a unique random number should be generated so that the user can later use this unique random number to reterieve his details from the database that refer to his unique random id. The unique random number should be atleast 9 digits long.
View 3 RepliesI am generating a unique Ref number using this sql statement: SELECT REPLACE(STR(CAST(CAST(NEWID() AS binary(5)) AS bigint),12),0,0) as REF Subsequently, I need to insert this REF into sql database table in stored procedure. Here is what I did in my stored procedure:
USE [iBankRecords]
GO
/****** Object: StoredProcedure [dbo].[stp_addPayee] Script Date: 07/05/2010 21:57:07 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROC [dbo].[stp_addPayee]
(
@CUSTID char(10),
@PAYEEACCNUM nvarchar(20),
@PAYEEACCTYPE char(10) ,
@PAYEENAME char(20),
@PAYERINITIAL char(20),
)
AS
DECLARE
@ReturnValue int
INSERT INTO PAYEE (CUSTID, PAYEEACCNUM,PAYEEACCTYPE,PAYEENAME,PAYERINITIAL, REF)
VALUES (@CUSTID,@PAYEEACCNUM,@PAYEEACCTYPE,@PAYEENAME,@PAYERINITIAL, REF)
IF @@ERROR<>0
BEGIN
PRINT 'ERROR'
SET @ReturnValue=1
RETURN @RETURNVALUE
END
ELSE
BEGIN
SET @ReturnValue=0
RETURN @RETURNVALUE
END
May I know how do I have generating a unique ref num and inserting the REF into the above statement?
I have to generate a unique token no which will have three fields an incrementer,comp_code anddate.I have problem in generating a unique incrementer. Incrementer should be incremented by 1 like 0001,0002 etc, should be unique and based on no of record inserted.
View 5 RepliesI need to generate a Unique Reference number that has 7 digits.
It should be formatted in the following way:
1st: B (Ball), G (Gift), C (Cat)
2nd: represents year of booking A(2010), B(2011),C(2012), etc
3rd: represents the month of booking J(Jan),F(Feb),M(Mar),A(Apr),Y(May), U(Jun), L(Jul),G(Aug), S(Sep),O(Oct),N(Nov),D(Dec)
4th: days of booking A(1st) - Z(26th), 1(27th) - 5(31st)
5,6,7th: These are counters for the number issues each day. Each can be A-Z,0-9 giving a total of 46,656 combinations. So 0 is first, then 1, 2, 3, 4, 5, 6, 7, 8, 9, A-Z, then 00 to 0Z, then 10 to 1Z, then 20 to 2Z, etc
Now , the 1st Digit is a Character that I generate based on a condition and that shouldn't be a problem.
This error is occuring randomly, and I can't seem to pinpoint what is causing it. For the most part, the code works fine. I'm confused why it works sometimes, but then suddently craps out on me, lol.It happens in the code when I call upon the asp.net membership provider. It only seems to happen when i use Membership.GetUser() to grab the logged in user's information.
View 9 RepliesI receive this error message: LINQ to Entities does not recognize the method 'System.Guid GetUserId()' method, and this method cannot be translated into a store expression. This is my code:
DB.Users user = db.Users.FirstOrDefault(u => u.Id == BOL.GetUserId());
BOL.GetUserId() returns a GUID of the current logged-in user (and this works works).
How can I make this LINQ code line work? Or, what is the shortest alternative? In the mean time I found out that there is a difference between LINQ to SQL and Entities. I use Entities because of the TailspinSpyworks example... but my code is using LINQ to SQL. My current solution is to use a var:
var userId = BOL.GetUserId();
DB.Users user = db.Users.FirstOrDefault(u => u.Id == userId);
Is this a good solution? And, is the execution time of Entities faster than SQL?
I need to loop through an XML document (no problem over there) and check if a value that i find is already in a (a) tag in a div in my XSL document that i am generating, only if the value is not in that (a) tag i should create a new (a) tag for it and put in in the div that i am checking... how to do it dynamically in XSLT?
<div id="tags"><span class="l_cap"> </span>
<a href="#" class="current">all</a>
<xsl:for-each select="root/nodes/node/data/genres">[code]....
what i am trying to do is: in the if statement, check if the current value is already exist in the div if not, add it, if is, don't do anything...
I have a text box that has values separated by a comma. I am trying to remove the duplicate values for, example this text box will have values like:
John, Adam, Mike, John, Mike
I want it to return unique values like:
John, Adam, Mike
I found a VB function and converted it to C# but it's giving me errors like newArray is a variable but used as a method. Thanks
public string RemoveDuplicates(string items)
{
StringBuilder Result = new StringBuilder();[code]....