I'm trying to get a decent sorting algorithm for my products database. Users can vote for their products with using scores from 0 to 5 (.5 scores are also possible like 2.5). My table structure currently looks like this:
Whenever a user votes I'm calculating the finalscore very simple like (TotalPoints / NumberOfVotes) = FinalScore. Then I sort the table on FinalScore and NumberOfVotes.Now while this works it's not excactly fair because a product which has only 1 vote of 5 stars can easily come in top rankings.I admit I'm not very good at statistics or algorithms to get a fair product listing and what I'm looking for is something which is not over the top diffucult but which is more fair then the method I'm using now.
I want to rate the product how can i check that how many users rated the product on that basis i want to show the rating.Many users view the product but they dnt date , i only want those users count who rated the product. My application is a website. I calculated the no og view of a product and of website. but want to maintain the no of users rated ?
I have a rating control that shows the average rating of a user supplied posting (think of a forum post that others will rate). So if the average rating for that posting is lets say 3 out of 5 all users will see 3 stars. If someone wants to rate the posting, then they could click lets say 4 stars and I save the rating to the database, re-average the current rating and display the result (which may or may not still be 3 at this point). So far so good. The problem comes in when a user wants to agree that it's 3 stars. Since the rating control currently shows 3 stars, choosing 3 again does not cause a postback. In my case even though the value didnt technically change, I need to capture the users choice so I can average it in and save that users rating. I also modify the UI so that I can show each user of the site what he/she choose as a rating.How can i get the control to let me know that a user choose a star rating even if its the same one the control is currently displaying?
I am using AJAX Rating Control.I want half star rating.For Example,If My AVG Rating Count is 3 Then My Stars Wants to be show 3If My AVG Rating Count is 2.5 Then My Stars Wants to be Show 2 1/2 mark i.e., two & half stars.But,it was not showing then also it is showing 3 stars.
Moderators Note: THIS ISSUE IS BIG FOR ME AND EVEN IF POSSIBLE, GET THE REPLY FROM THE DESIGNER OF GRIDVIEW. I have been looking for him for long. I am really fed up with reviewing a good lot of web pages on how we can possibly customize the gridview to enable sorting and paging. So many sites have listed out a lot of information and so many guidances. But the problem is that one works out fine and the other is a burden. I really feel bad about being given the job of customizing this kind of a gridview which has no user friendly approach to it. Also, this control is rendered without the pager links inside the <tfoot> tag. I have tried the Pear Pager in php. It is that good and easy to use and compared to that, the gridview in asp.net is the worst ever control i have ever tried so far.
1. i can use the images to indicate the sorting direction 2. I can have the custom pager like
[code]
<<Previous 1 2 3 .. 7 Next >>.
[/code]
When i click the next when i am viewing the page at 3 , the pager links should change as
[code]
<<Previous 2 3 4 .. 7 Next >>
[/code]
Kindly look into this type of requirement and firstly tell me whether this is possible with the gridview control. I would like this request even to be escalated to the designers of the gridview control also, so that Microsoft comes out with a reply THAT WORKS and not the kind of stuff like surfing through a lot of links and pages and finally wasting a lot of days precious time and still breaking the head with this useless control. I have spent a lot of time in searching for a perfect way. Not writing a code that is non-standard. I am really serious b'cos I have spent weeks in customizing this control. If I dont get a solid reply atleast now, I am going to generate all the output by HTML content by custom coding.
PasswordDeriveBytes take 4 paramteres and return an encrypted key basead on 4 parameters: passPhrase, saltValue, hashAlgoithm and password iteration
I wonder what algorithm PasswordDeviveBytes are using, so I can tell someone who are not .NET programmer that this secretkey was made by that alogorithm and that he can use this algorithm also - And then he should get the same results as PasswordDeriveBytes method
We are converting an ASP site (using DotNetNuke) to a new PHP site. The only thing we have right now is a full export of the existing database. One of the tables is called "aspnet_Membership" and contains the following fields:
Password (looks like base64) PasswordFormat (always value 2) PasswordSalt (looks like base64) PasswordQuestion (always empty) PasswordAnswer (always empty)
We would like to decode these passwords and hash them to fit our own framework. From what I understand from the .NET documentation these kind of passwords can be decrypted. Is there an algorithm available that can do this or is it more complicated than that? Will it be possible if we create an ASP script on the current server?
can I change the password algorithm and still use the sqlMembershipProvider or do I have to create a new sqlMembershipProvider. If so, are they any step by step tutorials on how to do that.
I need an algorithm to determine who match who in the tournament bracket, say I have 32 ( number could be flexible) contestants seeded 1 to 32, at round 1, seed 1 matches with 32, seed 2 with 31 and so forth. What about 2nd, 3rd, 4th and 5th round? I need an algorithm to be programmed into computer.
Using sha As New SHA256Managed Using memStream As New MemoryStream(Encoding.ASCII.GetBytes("Hello World!")) Dim hash() As Byte = sha.ComputeHash(memStream) Dim res As String = Encoding.Default.GetString(hash) End Using End Using
I have been unable to recreate the same hash for the same values with these two bits of code.
The javascript implementation returns: 7f83b1657ff1fc53b92dc18148a1d65dfc2d4b1fa3d677284addd200126d9069
and the vb.net example returns: ƒeñüS-ÁHÖ]ü-KÖw(JÝÒ mi"
What am I missing? I assume it's something to do with the character encoding?
I heard that .NET framework will encrypt the ViewState using SHA1 or some other algorithm. So if i know the SHA1 encryption and decryption algorithm can i tamper a ViewState?I mean a malicious user studies SHA1 encryption algorithm,if he understand that algorith and develops decryption algorithm ,will it open the road of viewstate tampering? or SHA1 or other algorithm uses any random tricks for encryption and decryption?
I need an example on how to implement AES encryption/decryption in .NET. I've been googling but haven't yet found any good examples. I've for example found AES example whih after some research wasn't 100% AES. I have to make sure by AES encryption/decryption is 100% AES, as I have to send email to the authorities explaining how I use AES (with secret key all), so they can hire some encryption expert which verify that we encrypt/decrypt it correctly. So he can verify that the what I implemented in AES is actually 100%. I'm reading the AES standard and how it's to be implemted in .NET Here is some code I'm having trouble with:
[Code]....
Which throws an CryptographicException: Specified key is not a valid size for this algorithm.
i want to encrypt the password by using the encryption algorithm dll uploaded by the user. is it possible to do the action. how can i call the method used by the user to create the dll.
SSCC The check digit calculation uses the standard method. Suppose you want to calculate the check digit for ID number 10614141192837465.
Step One: From the right to left, start with odd position, assign the odd/even position to each digit.
Index 1 2 3 4 5
Digit 1 0 6 1
Position odd even odd even
Step Two: Sum all digits in odd position and multiply the result by 3. (1+6+4+4+1+2+3+4+5)*3=90
Step Three: Sum all digits in even position. (0+1+1+1+9+8+7+6)=33
Step Four: Sum the results of step three and four: 90+33=123
Step Five: Divide the result of step four by 10. The check digit is the number which adds the remainder to 10. In our case, divide 123 by 10 we get the remainder 3. The check digit then is the result of 10-3=7.
I have a page that will receive an encrypted query string containing a user name, password & jobId, the problem is I don't want someone to be able to grab the encrypted url (browser history) and reuse it, so it has to change each time the page is requested.
The only way I can think of doing this is by having an encryption key associated with the the job and then change it after each time the page is requested. The client would either request the key or the entire url from a web service residing on my server.
Is this the best way to do this?
Is there a mutating encryption method out there I could use "out the box"?
Ranking of CONTAINSTABLE StatisticalWeight = Log2( ( 2 + IndexDocumentCount ) / KeyDocumentCount ) Rank = min( MaxQueryRank, HitCount * 16 * StatisticalWeight / MaxOccurrence ) can anyone explain this algorithm, more importantly i want to know about these variables used in this algorithm, whats their purpose?it would be more useful for me?
I am rewriting my PHP website into C# .NET, and I need to be able to set the algorithm used by the CreateUserWizard / Membership Provider to SHA1 so that I can port all of the user accounts over without having to force them all to reset their passwords when this project is complete. At current glance it doesn't look like it is using SHA-1, and my Googlefoo is failing me.
I have this Rijndael algorithm below as class and my problem is when I tried to call this class from Code behind page the methods inside this class is not appearing with me
