I want a number that would be unique forever, I came up with the following code,
it generates a number and adds a check digit to the end of it, I would like to know how reliable is this code?
public void GenerateUniqueNumber(out string ValidUniqueNumber) {
string GeneratedUniqueNumber = "";
// Default implementation of UNIX time of the current UTC time
TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
string FormatedDateTime = Convert.ToInt64(ts.TotalSeconds).ToString();
string ssUniqueId = DateTime.UtcNow.ToString("fffffff");.......
EDIT: clarification GUID can not be used, the number will need to be entered into a IVR system via telephone keypad.
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.
We have a spreadsheet that has a Zip column. These zip has a plus 4 digit in this format 99999-9999. When I looked at the format of this cell, it was a Special format with Zip+4 type. I just need to get the 5 digit zip code but the problem I am running into is the leading 0s. I tried =LEFT(A2, 5) but this trims the leading 0s. I also tried highligiting the column, then DATA -> Text to Columns -> Delimeter with hyphen but that didn't work. Is there any other way to do this or am I missing something on my first two attempts. Please let me know if you need more clarifications.
we have an ASP.net web application running on IIS7. We have multiple users, but we don't always know their password. Here's what we'd like to be able to do:
Login as some sort of administrator, be presented with our current list of users, click some sort of "Run as John Doe user", at which point we'd be able to see the application (or certain pages) as that user.We're looking to do this in a support/debugging capacity. I've looked into ASP.net's Impersonation, but that doesn't seem to apply here.
How generate the unique no. 1,2,3 and so on .... on button click of each new user ..
the code mentioned below is a readwrite coding in vb.net ...
but the problem is it generate the same id for different users on button click event... but i want the no. of times button clicked the new ids will be generated
The app is a small .exe to be installed in multiple machines. Each will access the db to get/update a field in a table and should be less than 1000 calls to it per day. I'm concern about the "locking" error message that I sometimes encounter (rarely) when running the program. Maybe increasing the default timeout would make it wait longer until the db is no longer locked?
I am here with a task to generate a unique no of specific length from another unique no.
I want my target unique no of say z length to be generate from combination of a unique no [ that may be a serial no ] of say x length and any secret key of say y length.
I want to generate a 16 digit random account number that should be unique in database for every new user of my website. kindly guide me how can i generate a 16 digit unique number.obviouly i understand that i would have to check that number in my database table for uniqueness and if that generated number already exist then i would have to generate it again.
Is there a function in .net that will take a number such as 134,501 and convert it to time? That time would be 1:45:01 pm. I was hoping i didn't have to reinvent the wheel for this.
I have a dropdown list which has items bound to it using sql datasource.
In the database i have the numeric values corresponding to each item.
Now there are many such dropdown list's and on selection of each item i want to form a 14 digit numeric code,which i need to use further for some more functionality.
How can i convert a selected item from a dropdownlist to a numeric digit??or how can i bind the items in the dropdownlist to a database having numeric value for each item?
E.g if i select 'WT' from dropdown list the corresponding value for it in the database table is 39 so on form submit i want '39' to be formed in codebehind. likewise on selection of all items from different dropdown list the digit formed using codebehind should be '15487523568955'
How to create 4 digit Sequential Number (0001 to 9999).
I have a web page, where students save their information. When the students submit the page, I want to add the string "Stu" followed by the 4 digit sequence number. The sequence number should be unique. The sequence number should increment to the next sequence, when a new record is getting added.
Could anyone please give me some code to generate Check Digit base on LUHN formula. Suppose i pass 15 digit of credit card number then fuction should calculate and generate the Check Digit.I found some link but it is MS SQL function and i tried it work well except if check digit is 0 it will return 1 so i get confused, because some time Check Digit is also 1 so in both cause this function returning 1.http://www.codeproject.com/Tips/120472/SQL-function-to-verify-Check-Digit-of-given-VISA-M.aspxI will appreciate if some one can give me VB code.
in my web application i want to validate that user can enter only digits and the digit may be a integer or decimal how can i write the regular expression for this.
I am working on a website. I am using C# 2008. I want to make a text box that accept only numbers & comma(,). for example-919981424199,78848817711,47171111747 or there may be a single number like 919981424199.
I was able to do one thing My text box only containing number by using this Regular Expression validation.in its property->Validation Expression i wrote "[0-9]+". This is working but now my requirement is to send bulk SMS & each number is separated by (,).
I had a 14 digit create datetime and resolved datetime in float time format and I could parse the date using following conversion:
CONVERT(datetime, LEFT(CAST(CAST(is_resolved_datetime as BigInt) as varchar(14)),8)+' '+ SUBSTRING(CAST(CAST(is_resolved_datetime as BigInt) as varchar(14)),9,2)+':'+ SUBSTRING(CAST(CAST(is_resolved_datetime as BigInt) as varchar(14)),11,2)+':'+ SUBSTRING(CAST(CAST(is_resolved_datetime as BigInt) as varchar(14)),13,2))
If I were to extract only the time difference of two datetimes in hr:min:sec.
I have a project that I have to import a text file. comma delimited values, into an Access 2010 database...I am experiencing a big problem that I have no idea how to work. I have two fields in the file that are 13 digit numbers... all my columns in the table are Text (255) yet this 13 digit number is causing the Data connection to close instantly with no data saved.When I look at the data in Excel it looks like this...4.76334E+15 in Notepad 4763341000002623 (the true and correct value).If I use Access import text tool in Append mode the table it crashes. If I use the same tool but this time tell it to create a NEW table it works.Error Msg...Microsoft Access was inanble to append all the data to the table.
The contents of fields in 0 records were deleted, and 0 records were lost due to key violations.*If data was deleted, the sata you pasted or imported doesn't amtch the field data types or the fieldSize property in the destination table.*If records were lost, either the records pasted contain primery key values that already exist in the destination table, or they violate referential integrity rules for a relationship defined between tables.Do you want to proceed anyway?Why is Access crashing and what can I do to resolve the problem?
