Architecture :: Database Update Table Field Time To Time
Feb 1, 2010
I need to do an update a field in database every x minutes. ie: a person login and I need to update a field related to they every X minutes until the value reach a value. Like this, this person start a count event from 1 to 10, they log off the web, but this count must remain countting until reachs 10, 1 by 1 every 7 minutes. I cannot do a SQL Job. Should I User a System.Timer??? Should I record the time and value of the last update, when the person log in I cauculate and update the value??
This is the sqlDateTime overflow problem again. Background. As I'm sure you know dates must be between 1/1/1753 and 12/31/2999. If you have an empty date field, it throws and exception. So I created a function (below) that solve the problem when attempting to update or insert a record with a date field. Works great.
Public Shared Function MakeDateField(ByVal pasDate As String) As Nullable(Of DateTime)
If IsDate(pasDate) Then Try If pasDate <= System.DateTime.MinValue Then Return Nothing Else Return CType(pasDate, DateTime) End If Catch ex As NullReferenceException Return Nothing End Try Else Return Nothing End If End Function
So I thought about using a time field. I have the field, have the validator in place and then attempted to test the page. It resulted in my least favorite error message "sqlDateTime overflow".
I can think of several workarounds like adding a date or a fixed date to the time field, or converting it to a string. Each of these is problematic.
IS THERE A BETTER WAY TO UPDATE/INSERT TIME FIELDS.
Given a Database that has a table Called [Bid Transactions], which contains records of all available auctions that are currently running on an ASP.net website .. something similar to Ebay.com, when the deadline of the auction passed, I should close that auction, Send a notification message to both the item owner and the bidding winner to inform them.
how should I keep track of all open auctions? how could I monitor all their ending time and update the Auction status to be "Closed" on Real-time basis? ..
(1) Using SQL jobs ? .. that should reduce system performance .. shouldn't it ?
(2) A back-end service that is running on the server and uses Threading ? .. I have no clear background about that solution.
In my asp.net application I user Microsoft Membership to manage site access security and find the time saved into LastLoginDate is ahead of local time (Eastern Time Zone) 3 hours. What is wrong with it and how to ajust it to local time by application system only such as changing some properties od application?
I have a date/time stored in a smalldatetime field (ms sql 2005) that i want to compare with the current time and receive a difference. If the difference is less than 30 minutes, do this....if more do that....
I've pulling back an entity object from a database and I need to update the date to the DB server's date/time - usually you could accomplish this by setting it with the SQL getDate() function.
How can I accomplish this in the following scenario:
var client = context.client.Where(c=>c.clientID == 1).FirstOrDefault();
// the value needs to be the value of the server's current date, i.e, getDate()... not DateTime.Now client.someDate = <somevalue>; context.SaveChanges();
I have a gridview on my page. I have a checkbox in each row of this gridview. For each checkbox in the gridview, I'd like to update my table accordingly, but I don't want them to have to hit a submit button every time they check the checkbox. I want them to check all the boxes they need to and at the end, they should hit one submit button.
I'm trying to make my string a nice formatted time but the column in the database isn't set up as a date/time field is there anyway I can do this? Here's my query
Dim query as String = "Select * from openquery (devbook, 'SELECT wb.arrival_time FROM web_bookings wb ')"
How to go about creating a grid/table that can updated at run time by the user and can also be printed and exported to Excel. I have the print function working and I know how to export datagrids to Excel. Im going to attach an example to explain more clearly what Im looking for. Is this possible with a datagrid?
I am using calendar extender and time picker control. When I click insert in my application, my date is going into my database but my time is not going from my time picker control into my database.
Do I need another column for my time picker control ?
I'm having a gridview in my aspx page with checkbox, User can select one or more than one record(s) at a time and clicks on delete button, Then i'm constructing an object of my DTO and adding all the checked row's Primary Key (DataKeyNames - GUID's in case) to a serializable class and generating an XML and sending it as parameter to the Stored Procedure.
My Doubt is, can i bulk delete all the rows from database table those are present in my XML document??
If it works, I can do bulk update with XML only, i already did bulk insertion by generating an XML..
My Another Question is, Will it affect the performance? Each time when i construct an DTO object and adding it to the Generic List??
WHich one is better, I mean ObjectDataSource or SQLDataSource or my XML method?
My web application has hosted on the canada server but my all clients are indians.So, as I am using System.datetime.Now to store all the dates in application.Obviously, it is displaying the canadian time instead of india time.How can i do it?Is there not any gloabl settings that we can do in our web.config file so that it indicates to the server at run time which time zone to execute..?Or any other suitable alternate?
In short, I have 3 text box fields on an .aspx page named as follows:-
TextBoxIncident TextBoxDate TextBoxDescription
in addition a sql datasource is on the page which is connected to the incident table with an insert query which allows the data entered into the fields to be inserted into the database...
The Textboxincident and textboxdescription fields allow the user to enter data into them...
the TextBoxDate field is a read only and the code behind file enables the text box to show the current date and time the code im using is shown below...
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim TextBoxDate As TextBox TextBoxDate = FormView1.FindControl("TextBoxDate") TextBoxDate.Text = DateTime.Now End Sub
When run in browser the textboxdate field shows the current date and time...and Once the textbox incident and text box description fields have been filled in and the submit button is clicked, the fields should be bound to MS SQL table called Incident. This did work before, however it as suddenly stopped working and now displays the following message to me:-
Arithmetic overflow error converting expression to data type datetime. The statement has been terminated.
i have to listen my mail server for every 30 min. i have a distribution list and i want to count number of email comes for that distribution list and no of replies goes from the outlook for every 30 minutes. also i need to get the time difference between the replied time with arrived time of the mail. so show me some sample code
I'm using Telerik's RadScheduler Control with WebService Binding.
I've used RadScheduler with Server Side Binding which has an event called "OnTimeSlotCreated" which fires every time when a particular time slot creates so that i can access the time slot and get the control (HtmlTableCell Control) to modify it according to the requirement.
But now i'm binding it from client side through WebService which has no such "onClientTimeSlotCreated" event, also these time slots are not having any identity at client side to access.
how to suppress the "AM" in the gridview (template Bind("RideTimeMin", "{0:t}")? Don't tell me to use military time because the function is not "time on a clock"; it's how much time is allowed for a task (in this case the min/max hours & minutes that horses have to complete a 20 mile trail; e.g. 05:00, 05:27, etc). I'm currently accomplishing this in the "ondatabound" function by "..RTmin.Replace("AM","")". I have looked and looked at all the websites that talk about datetime formatting but have yet to find a way to do it upfront in the gridview bind statement.
I am wondering how is the real-time notification in facebook achieved? What kind of technologies are required?
Another question: I have a asp.net website and a back-end processing software. I want the back-end processing software to comunicate with the website so that the website can dynamically update the page. I am thinking that web service may be the solution. Is this right?
I am building a small mass email application for my department. Which basically emails out a notice to a large list of email addresses. Because the company email server limits the amount of email addresses that can be contained in a single email I have to break the list apart into smaller 100 email groups.
I've create the query to pull all email addresses needed, stuffed them into a collection but I am not sure how to grab 100 emails at a time and send it off to another sub to perform the email send before grabbing the next 100.
My web application currently requires users to upload files, after which I take it for "further processing". This processing is VERY time consuming and can take a while before the control gets back to the user. I would like to run this in the background and not have the user wait until this completes.
I know this question has been asked in this very forum before but I'm not able to understand or I'm not able to proceed in the right direction. My understanding is there are a few ways I can go about this
a) create a BackgroundWorker process in my Global.asax file that will spawn a process and take care of the activity.
b) create a web service that will do the processing for me .. (how?)
