I have an application, that is accessing by number of users at the same time. Those users, who are accessing the application getting the same id. Here what i am doing in the code is, when they are creating new user i am getting a max id from DB and increasing the value to 1. So that they are getting same ID. so that i am facing concurrency in this situation. How to solve this problem. I need to display different numbers when the users click on NewUser. I am using SQL server 2008 and .NET 3.5 and C#.NET
I've been quite impressed with dynamic data and how easy and quick it is to get a simple site up and running. I'm planning on using it for a simple internal HR admin site for registering people's skills/degrees/etc.
I've been watching the intro videos at www.asp.net/dynamicdata and one thing they never mention is how to handle concurrency control.
It seems that DD does not handle it right out of the box (unless there is some setting I haven't seen) as I manually generated a change conflict exception and the app failed without any user friendly message.
Anybody know if DD handles it out of the box? Or do you have to somehow build it into the site?
I am trying to handle concurrency in my application. Basically if user A has a support ticket open which currently has a status of 'Active' and user 'B' opens the same ticket and closes it (changing its status to closed), I would expect a confict execepton to be thown when user 'A' tries to close the support ticket. For some reason this is not happening. I have checked that Update check is set to 'Always' in the dbml file. Here is an exerpt of my code. // Update 'Active' lead to 'Close'
I have the following problem:- I have a Settings table which has a value column, that is incremented everytime a Job is created (I use Entity framework to add the job and to update the value increment). So, I have something like this:
[Code]....
The problem is: I have a asp.net with concurrent calls to SaveJob Method. In this code, the value is shared, and if I call SaveJob 5 times for instance, the value column is 3, because the scope is not "locking" the other transactions until It's done, and the value is shared. I want to have the following scenario: Call SaveJob 5 times;Value column in Settings table is 5;Call SaveJob 3 more times;Value Column in Settings table is 8. I tried to implement something like pessimistic concurrency in EF, but I had no success. Whats the best way to handle that without using SQL Server queries directly? (like 'lock' and 'unlock' etc)
I have unexpectedly found that I cannot access my data tables from VS 2008. A window comes up saying "The server version is not supported. Only servers up to Microsoft SQL server 2005 are supported". Also, as a consequence I imagine, two web sites which refer to datatable have stopped working.
Has my ISP updated to an SQL version that VS 2008 can't handle ?
I have an online flight reservation system that users can reserve flight ticket,my problem is in concurrency,i have a 'remaincapacity' field in my flight table(keep flight properties) and when a user want to get a ticket i first check this field an if the value is greater than number of ticket that user requested i subtract 'remaincapacity' and after that i allow user to reserve that ,how do in control concurrency?
Actaully i developed an Asp.net website which has a PDA app part. The case is that employees from company come in the morning and get data in their PDA's and they work on them the whole day and in Evening they again come to office or from any web access they update the data on server. We did this through Web services because web services are remote methods so they could access that by only web access..
Now the problem is Concurrency that while syncing through web servies how to control Concurrency however their could be many employee who try to update data at a time.In web servies we receive DataTable from PDA application and do update or insert operations through LINQ with Sql Server.
I'm used to public facing websites that use ASP.net membership - and when the SESSION vbl's timeout we re-direct to the login page like this
Code:
If Session("Yr") Is Nothing Then Page.Response.Redirect("~Login.aspx?reason=timeout") End If
And on the login page we check for that reason and put up a label on the screen saying that things timed out to protect sensitive data. This works fine. Now I'm doing a web site that's in house - and when the users connect they get a BROWSER POP-UP to login with the DOMAIN UN/PW - and once they get past that my default page redirects them to a home portal page. What do I do when my session vbl's expire now? I can't redirect to a login page - there is not one. How do I cause the re-authentication to happen more naturally?
I'm building a browers-based game that will need to constantly be updating EVERYONE'S accounts regularly; what is the best way to go about doing this? Creating a process that runs every time someone goes to a page on my site slows down the load time immensely. Do I need to create a windows scheduled task that calls this/these process(es)? It will need to constantly run.
I have a class with properties for stuff like FileNumber, OpenedDate, ClosedDate etc.When I Initialise the class I set the datetime variables to Date.MinValue.Then when I populate my textboxes I check if the value of the date variables are Date.Minvalue and I set the textbox text to an empty string.
Code: If(File.OpenedDate = Date.MinValue, String.Empty, File.OpenedDate.ToString("yyyy/MM/dd")) However whe I try to save the data to my sql server db I get a datetime out of range error. What is the correct way to handle these null values in my date columns?
Trying to figure out how to handle data returned for a site search from a description field. I don't think I want to display all the text from the description field, but I also don't want to "chop" a word in half. How do I get the first 100 characters, plus a few extra letters if needed to prevent a word from being chopped in half. In some cases, the description field is less than 100 characters, so all the text will be displayed. However, if the description does need to be chopped at 100, I'd like to finish the word and add ... to indicate that there is more text.
I have a bit of code in a clickevent handler like this:-
Dim products = From p In db.Products where p.product_name = "Tool" Select New With {p.Product_ID,p.Product_name} Gridview1.Datasource = products GridView1.Databind()
But causes error=SQL Server does not handle comparison of NText, Text, Xml, or Image data types?
Would something be missing, not working, or confusing if I do this? First, install SQL Server 2008 Standard, and SP1. Then, install Visual Studio 2010 Professional, unchecking SQL Server 2008 Express option. Or would I need to fix any configurations afterwards?
i have a store procedure that load data in a table of SQL SERVER 2008 from an excel file.the issue is, that the excel file have a column of DATE type, and i want that the system interprets the format in it, no matter what comes in it.dd/MM/yyyy mm/dd/yyyyi have an argue about this with my parnerts, cause i think is imposible, if you don't have a format before the process runs.
My project includes a grid view with some updtable fields, some fields throw an error on update and some do not and it does not really make sense. WORK_STATION_ID does not cause an error, ROOM _ID cause an error, both are int? (I am using c#) and for update I use the code liste below.
when a user select a room i want that it lockes and an other person can not select it.
i think it`s better that i have a flag in my table and when a user select room value of is false and if cancle reservation ,i changed it true.an other person can see room that they have true value .
I want to know how to handle the concurrency throughy code ? ie: I want to access the Concurrency issue or error ? Because if i get the concurrency user or issue I have to do some manipulation.
I have looked at all the posts I can find on this problem and tried everything I can think of, but still the problem persists. I am getting really sick of it.was working fine for the last year until an update to MS Office 2007 caused a lot of problems (automatic update). After checking posts here, I removed it completely. No change. I then tried all the things I could find on other posts, also no change. Today, I removed VS and the Web Authoring Component and re-installed. Still no go.
Does anyone have a fix for this problem. It seems that it has been around a long time, but is still giving problems. I even saw one suggestion to reformat the drive! You've got to be joking!
I'm creating a website and I'm testing resgistering and Log-in.
I followed a simple tutorial to create a Log-in in Visual Studio C# template which generated a SQL Server database.Locally the Log-in and registration page works perfectly. The problem is that when I upload my site to the hosting site the navigation works but the Log-in and Registration forms send an error when clicked "Register" or "Log-in". I contacted the site and they upload my database the way it should be because I was doing it wrong. I can see all my files including the data base.
They commented me that I had to do a connection string to the data base so the login and registration forms can work. I don't understand how to do that, I know the connection string has to be declared in the Web Config File, the thing is that I don't know how to write that code and link it to my data base in the hosting site, in fact I have sample code but I don't know just what do I need to put in it.
I am looking at developing using Visual Studio 2010/2008 and SQL Server 2008 on Windows 7. Should I be able to do this on Windows 7 Professional, or do you need Windows 7 Ultimate?
I have a web service that runs a query (from C#) to get a dataset from sql server. I get the following time out error. Googling on this error says, you can set the timeout on command object. But I am not using command object to set the timeout. This is the code I am using to get the dataset.
