A Randomly Generated 20 Character's Alpha-numeric Key?
Mar 14, 2011How can i create A randomly generated 20 character's alpha-numeric key in asp.net i need to save it i database on some link click.
View 3 RepliesHow can i create A randomly generated 20 character's alpha-numeric key in asp.net i need to save it i database on some link click.
View 3 RepliesI would like to generate sequential IDs in the format ZZZ999 starting from AAA001 but this is not for batch insertion of data. I want to issue the ID to users that signup on the website with the next available ID. Mutiple users can signup and should be issued the next available unique Id. I was thinking of storing the last used Id (just one row that is always updated with last issued id) in a table that I can lookup and use to determine the next id and update it. But given that mutiple users can be signing up at the same time, what is the best way to ensure that each user is issued a unique id while maintaining the issue of sequential ID. Will record locking work? I don't think so, as the last issued id can still be read by mutiple users and that it self will generate the same Id which will not work.
View 3 RepliesI'm looking at some site code on an XHTML doctype and from what I'm seeing the framework is ASP.net. The IDs in the HTML has a "$" in there. For example:
<img id="$ct100templateContent$SectionPanel1$ctl01$ctl02ctl00_templateContent_SectionPanel1_ctl01_ct999img" src="this.jpg"/>
From a W3C semantic point of view the "$" is not valid in an ID or Class. IDs and classes can only contain alpha numeric characters in an XHTML doctype.
Is the the "$" a ASP.net naming convention referencing a web control or template item?
MMM the title speacks for it self i think,
View 3 RepliesI have a FileUpload control that currently uploads pics to the Photos folder on my server. What I would like to know is how would I give it a randomly generated filename when it gets uploaded? As I don't want duplicates later on down the line. Cheers.(Code below).
[Code]....
Code Behind:
[Code]....
I want to validate in server side, Suppose I have entered first numeric and another chars,I don't want to allow first numeric then how to validate in server side
View 1 RepliesI have a site that allow the user to request a secret report in a pdf format. My idea is to put the generated pdf files in a public folder with disabled directory browsing. Each file name consists of 128 characters that are uniquely and cryptographically generated. The legitimate user will be given the link of his/her own report.
View 2 Repliesi have set the type of a column in a table numeric(6,2) but when i insert a value above 9999,99 i get the error
"Arithmetic overflow error converting numeric to data type numeric."
Do you know whats wrong??
ofc thats all through visual studio for an asp site thats why im posting here
First of all im new to asp.net and am in the process of learning it.
Heres my problem, i am receiving this error when submitting the form: "Arithmetic overflow error converting numeric to data type numeric"
And it halts at command.ExecuteNonQuery();
Input form:
[Code]....
Code Behind:
[Code]....
Stored Procedure:
[Code]....
My issue is that , need to change the column name(following format "Remove first character and after 3rd character insert colon") of the gridview (which is binded with XMLTextReader). Without changing directly XML file, Required to change the column name dynamically at runtime .
Performance.xml
<Performance>
<Departments>
<Heading>FS</Heading>
<S0015>1</S0015>
<S0020>2</S0020>
<S0025>5</S0025>
<S0030>5</S0030>
<S0035>6</S0035>
</Departments>
<Departments>
<Heading>BS</Heading>
<S0015>0</S0015>
<S0020>3</S0020>
<S0025>5</S0025>
<S0030>1</S0030>
<S0035>3</S0035>
</Departments>
</Performance>
Heading S0015 S0020 S0025 S0030 S0035
FS 1 2 4 5 6
BS 0 3 5 1 3
Required Format: Remove first character and after 3rd character insert colon (S0015 -- 00:15)
Heading 00:15 00:20 00:25 00:30 00:35
FS 1 2 4 5 6
BS 0 3 5 1 3
Norwegian character( å æ ø) does not show instead showing some strange character.
used function below:
utf8 = System.Text.Encoding::get_UTF8();
How can I prevent the user from entering anything but alpha characters in my textbox?
Update Forgot to mention that its a dynmic control (created on the form when the user clicks a button).
I looked up the msdn documentation and it says that InvalidUserName is thrown when it does not find the username in the database, which is fine because the user I am creating should not exist in the database. If I use test@example.com, it works, but if I try it with test.@example.com, the status from Membership.CreateUser is InvalidUserName.
View 1 RepliesI came across this RDMS via the advert on stackoverflow. Seems to be in the vein of MS Access / Filemaker / Apex database development tools but focused on web based applications. It quotes rave reviews from EWeek and a favourable mention from Dr Dobbs regarding its ability to create AJAX web applications without coding.
The Eweek review, apparently written by an ASP.NET programmer, goes on to proclaim the ease at which apps can be extended using the inbuilt XBasic language and how custom javascript can easily be added without wading through code. Has anyone here built a web app with Alpha 5? Does anyone have comments on the development process, the speed of it or limitations they encountered along the way? To me it seems Oracle APEX comes closest to the feature set, has anyone programmed in both and have any comments?
I've just encountered an interesting problem in a standard BoundField in a GridView. The field is for EmployeeCode, which is purely numeric, but stored in a character column in the database. The DataFormatString="{0:00000}" attribute on the BoundField doesn't work, as I assume that format is only for numeric values.
To work around this, I had to use a TemplateField, and bind the text value using the attribute Text='<%# PadNumericString(Eval("EmployeeCode").ToString(), 5) %>'. Is there no simpler way of doing this?
How to read character by character in line from text file?
View 1 RepliesI have a legacy MySQL database which stores the user passwords & salts for a membership system. Both of these values have been hashed using the Ruby framework - roughly like this:
hashedsalt =
Digest::SHA1.hexdigest("--#{Time.now.to_s}--#{login}--")
hashedpassword =
Digest::SHA1.hexdigest("#{hashedsalt}:#{password}")
So both values are stored as 40-character strings (varchar(40)) in MySQL. Now I need to import all of these users into the ASP.NET membership framework for a new web site, which uses a SQL Server database. It is my understanding that the the way I have ASP.NET membership configured, the user passwords and salts are also stored in the membership database (in table aspnet_Membership) as SHA1 hashes, which are then Base64 encoded (see here for details) and stored as nvarchar(128) data.
But from the length of the Base64 encoded strings that are stored (28 characters) it seems that the SHA1 hashes that ASP.NET membership generates are only 20 characters long, rather than 40. From some other reading I have been doing I am thinking this has to do with the number of bits per character/character set/encoding or something related.
So is there some way to convert the 40-character SHA1 hashes to 20-character hashes which I can then transfer to the new ASP.NET membership data table? I'm pretty familiar with ASP.NET membership by now but I feel like I'm just missing this one piece. However, it may also be known that SHA1 in Ruby and SHA1 in .NET are incompatible, so I'm fighting a losing battle.
how can I allow only alpha characters into a dynamically created textbox? I don't think I can use a regular expression validator for this issue. Unfortunately, I cannot use Ajax for this issue either.
View 8 Replieshow to disable alpha input to text box..??
View 1 RepliesCould not load file or assembly 'AlphaDatePicker, Version=1.0.0.23, Culture=en-US, PublicKeyToken=9ffb2c51638f3726' or one of its dependencies. The system cannot find the file specified.
View 1 RepliesI want to read a line character by character, in the sense I want to read each and every character on the line. can I can make that line as a string. breaking string into substrings ? if possiblw how.? I m unable to start. can anyone give the code.
View 7 RepliesOur solution is built on ASP.NET v1.1 framework. User is presented with login form, so upon providing credentials this information is posted back to the server. Upon postback SessionID changes and our application crashes as some information which is required for processing is stored in the cache and is identified by SessionID string as a part of the name.
This SessionID change happens absolutely randomly and only to some of the clients. Most of the time browser used to view the page and post info is IE8. I cannot reproduce this issue in our test environment, as SessionID is persistent though-out the whole testing process.
I've already checked all solutions, i.e.
Session cache is used on Page_Load to retrieve/store some information, so it's initialized and contains data stored. I've made a Health Monitoring check on Application_End event to capture any possible AppDomain crashes using Reflection and Diagnostics Libraries and retrieving ShutDownMessage from httpruntime object, but that's also not a case. Cookieless attribute of the sessionState in web.config is set to false (using URL to store SessionID is not an option) All MS security and bug fixes are installed on the server. IIS Server settings are similar to the ones we use in Test Environment.
We have an ASP.NET 3.5 application that has been in production for over a year. Our last release was a couple of months ago. We use CSS for styling and application of background images to divs and such. The server is Windows 2003 with IIS.
Suddenly, this week, we have had reports from some users that the page seems to hang up while loading. The status bar was showing the name of a background image used in the page main area (assigned in CSS). At our office, some of us could recreate the problem, while others could not. IE6 and Firefox do not seem to be affected, only IE7/8. Running Fiddler on an affected machine and trying to see what was happening with the requests seemed to make the problem go away (while running through Fiddler, it returned when not). Hitting Refresh on a hung load often made the page load just fine.
I checked the background image, and even replaced it with an archived copy. No joy. We re-deployed the app from our production source. No Joy. We restarted IIS and eventually rebooted the whole server. There are no unusual entries in the event logs, the app logs or the IIS logs. Finally, I removed the image entirely and re-styled the page not to use a background image. That solved the problem at least for now.
However, we have reports of other images "hanging." The images are PNGs, but I have heard some rumors that sometimes a GIF hangs, but I have no screenshot to confirm.
This just started happening "out of the blue." There have been no releases or updates applied to the server recently. We even checked updates on clients to see if a recent Windows Update might have caused this on the client, but there was nothing updated within the last couple of weeks.
I want know How I can Display Image from database randomly when the web page refresh in Asp.net by C# code
View 5 RepliesI have a very strange issue, I'm using System.Data.SqlClient. to get data from a SQL Server though a stored procedure. When I test the Application at the Development and Stagging machines it works fine but when I deploy the application on the Production Server I randomly getting an SqlDataReader IndexOutOfRangeException with different column names!.The error appears in 2 requests in each 1000 request (approximative).
public static List<CountryInfo> GetAllCountries(){
List<CountryInfo> Items = new List<CountryInfo>();
try{
using (rdr = SqlHelper.ExecuteReader(Globals.ConnectionString, "unv_spGetAllCountries"))
[code]...