ADO.NET :: TimeStamp Value Retrieval In VB.Net?
Mar 21, 2011what the equivalent datatype of sql server timestamp in VB.NET,and How to retrive the exact value of timestamp from sql server in vb.net.?
Similar Messages:
ADO.NET :: How Does Data Retrieval Works For Linq
Mar 28, 2011I was looking over the Create a Movie Database Application in 15 Minutes with ASP.NET MVC (C#), and it used entity framework and I saw this code.
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I am just wondering, does this mean, this code actually downloads ALL the data from the SQL server for that table, and then filters where the Id matches, and then is stored in the var originalMovie? I have seen the "Linq to SQL", does this send this as sql query to the SQL server, and therefore only the relavent rows are returned from SQL server?
Architecture :: Document Storage And Retrieval
Dec 21, 2010In our organization we had to write code to store and retrive documents in many apps. Now I would like to write a service/library that can be used my other devs. Not sure how to start about that? What should be my first step.
View 5 RepliesWebMatrix :: Image Retrieval From Db Only Getting SystemBytes[]?
Feb 7, 2011I have been following various guides online and they seem to be great and i learning a great deal and i have my learning set out however i have come across a stumbling block "yet again"
I was following Mikes SQLce image upload guide and I got it, I understood it all "in theory"
[URL]
however what i couldn't figure out is when i want to display that image on a separate page or pull it back into a webgrid it just showed me SystemByte[] and not the image. Or a long string of writing that started -System........
I tried stripping Mikes code thinking well he is pulling the Image from the DB once the postback is done so why cant I do it on another page or in another <Div>. ?
If im not mistake it has somthing to do with this line
Response.BinaryWrite((byte[])file.FileContent);
Here is mmikes code:
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Security :: Aspnetdb Does Not Let Password Retrieval?
Apr 25, 2010I had a web application. We needed to move it to anotherserver, after we moved that, the membership database (aspnetdb) did not work.....finally i solved the problem, and now I have another problem. although in the web.config enablepasswordretrieval is set to true, and the type is clear, i get error in password retrieval.
View 7 RepliesImage Storage And Retrieval In File System?
Jan 11, 2010What is the best approach to storing images in a file system. Currently I am separating the images by day, month and then year. I am also hashing file name so that no two files will be stored with the same name. Lastly, how would I go about using the image file address in a forum?
View 3 RepliesSQL Server :: Partial Retrieval Of Dataset Values?
Aug 5, 2010I have to know how to achieve the following senario in an web application,I have a search functionality, where i will give some parameteres which are used as input to my select query in sql database.
Once i click the start search button the parameters will go to database and execute the query. and display the result in application.If i click the Stop Search, i want to retireve the records which are available till that time. How can this be achieved in .net
What Is The Use Of Timestamp
Mar 16, 2010What is the use of timestamp? where should i use this?
View 2 RepliesSecurity :: Password Retrieval / Configure It To Work With The Log In Name And Email Address?
May 5, 2010By default the Password Recovery control requires the username to send the user the login details. Is there any way I can configure it to work with either the log in name and email address or failing that just email address?
View 1 RepliesForms Data Controls :: GridView Increased Pagesize And Poor Retrieval Performance?
Feb 21, 2011I have developed a application using Visual Studio 2008 and SQLServer 2008. I have a page called "Billing Center" where i need to display more than 500 records in a gridview and the gridview has sorting enabled. If i limit the page size upto 10 only the gridview performs well but user requirement is to view atleast 500 records at once which is slowing down the gridview record retrieval process.
I am using the following C# code in code behind to sorting, paging and retrieval . Please guide me what am i doing wrong in this code and how to make it work with large data set.
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DataSource Controls :: Design Pattern For Pass (master/detail) Data Retrieval?
Apr 18, 2010design pattern that works well with Visual Studio data tools against an MS SQL server; to retrieve a subset of an object's fields for all rows, and then on-demand retrieve the remainder for one row. I.E. just the small summary fields that I will serialize to a master grid view, then the larger properties including a large blob that I will render in a detail view. The performance hit from retrieving the large blob with the master result list would be too great.
The data shape is static, and I can define two separate data classes to match the specific summary vs. detail information returned. However that sounds anti-pattern-ish, to define the data classes specifically to suit the presentation layer. It also presents another problem, how to translate from the summary item to the detail item in an object-oriented way?
Converting Date Time Value To Timestamp
Mar 25, 2011I have a web page that has a textbox for users to enter a datestring to check against a database. The database that I am running my query against has datetime values set at minutes since 12/31/1899 and that returns a timestamp. What I'd like to do in my code is to convert my textbox entry into minutes since 12/31/1899. Does anyone have an easy way to do that?
View 1 RepliesDataSource Controls :: Benefits Of Timestamp - Why Use It
Jan 16, 2010I would like to know what does a field timestamp in MSSQL do?I have read a book "ASP_NET_3_5_Social_Networking" and almost all the tabels have a columnt with type "timestamp" in their example app.What is the benefit of timestamp , and why should i use it?
View 5 RepliesSQL Server :: Specify A Criterion For Current Timestamp?
Mar 9, 2011I have a column in my table that is named 'startDateTime' and 'endDateTime'. I need to select all the rows where current time stamp is in between the startdatetime and enddatetime. Note that the datatype is smalldatetime. How to do this?
View 1 RepliesSQL Reporting :: Append The Timestamp To The Report Name?
Jan 25, 2010I have created a dynamic data-driven report delivery by email in Reporting Services 2005. The report will be attached as PDF format. I can add the execution time stamp (@ExecutionTime) to the subject and comment lines. However, I cannot find a way to append the timestamp to the report name.
View 1 RepliesConvert.ToDatetime Not Adding Timestamp?
Oct 18, 2010For example:
Dim testdate As String = "29/10/2010"
testdate = Convert.ToDateTime(testdate.ToString)
Response.Write(testdate)
expecting "29/10/2010 00:00:00" what I get is "29/10/2010"
How To Convert SQL Server Timestamp Object To String In C#
Dec 9, 2010I have a column (data type timestamp) in SQL Server 2008.Now I want to show this timestamp value in ASP.Net C# app as string. Is there any way to do that?I tried it using regular data fetching in ASP.Net but it produced System.byte[] as output rather than actual value. In SQL Server Management Studio values are represented as 0x000000000000B3C0
View 2 RepliesADO.NET :: Timestamp Wrongly Treated By LINQ / ASP As String
Feb 12, 2011I was following a MSDN walkthrough [URL] which is a very simple ASP.NET example with Visual Studio 2010:
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I have a simple database table with a timestamp column;
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I created a "Linq to SQL Class", and drag the table from Server Explorer onto it;
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I dragged a LinqDataSource onto the web page and pointed it to the dbml;
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I dragged a DetailsView onto the web page using the LinqDataSource.
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I enabled editing on the data source.
When I run, the time stamp column is also displayed on the DetailsView as something like "AAAAAAAAB9Y=". Then, when I change the "EmployeeName" and update, I got following exception: Failed to set one or more properties on type person. Cannot convert value of parameter 'tstamp' from 'System.String' to 'System.Data.Linq.Binary'. I was strictly following the MSDN walkthrough. I tried multiple times, I even installed Visual Studio 2010 SP1 Beta. But it consistently through this exception. Can someone shed some light on this? Not a encouraging start form someone thinking to learn the lastest Microsoft stuff!
I was following a MSDN walkthrough, which is a very simple ASP.NET website with Visual Studio 2010: I have a simple database table with a timestamp column;I created a "Linq to SQL Class", and drag the table from Server Explorer onto it;I dragged a LinqDataSource onto the web page and pointed it to the dbml;I dragged a DetailsView onto the web page using the LinqDataSource.I enabled editing on the data source.When I run, the time stamp column is also displayed on the DetailsView as something like "AAAAAAAAB9Y=".Then, when I change the "EmployeeName" and update, I got following exception: Failed to set one or more properties on type person. Cannot convert value of parameter 'tstamp' from 'System.String' to 'System.Data.Linq.Binary'. I was strictly following the MSDN walkthrough. Can someone shed some light on this? Not a encouraging start form someone thinking to learn the lastest Microsoft stuff!dfsaf
Databases :: SQL - Create A Variable That Holds The Value For Each Row Of The Timestamp?
Feb 8, 2010I'm making a simple forum using MySQL and I use a repeater to display a list of all threads in it. I have two tables for posts, one for threads and one for replies, and I want to sort the threads by either when they were posted or when the last reply was posted in it. My SQL query is really long and hard to read so here's some psuedo code similar to it (easier to understand these column names, etc):
SELECT
threads.id,
threads.title,
threads.timestamp,
users.username,
(SELECT COUNT(*) FROM replies WHERE thread_id = threads.id) AS number_of_replies,
(SELECT COUNT(*) FROM views WHERE thread_id = threads.id) AS number_of_views,
(SELECT timestamp FROM replies WHERE thread_id = threads.id ORDER BY timestamp DESC LIMIT 1) AS last_reply_timestamp
FROM threads
LEFT JOIN users
ON threads.user_id = users.id
ORDER BY ************** DESC
What I do here is I fetch the values id, title, timestamp, the author's username, the number of replies and views for a specific thread, and I also get the timestamp for the last reply to this thread.
Then, what I want to do is sort the whole list so that the threads are displayed in an order matching when either it was posted or the last reply was posted in it (you know, like a normal forum) but I'm not sure how to accomplish this.
I tried this:
ORDER BY CASE WHEN last_reply_timestamp > threads.timestamp THEN last_reply_timestamp ELSE threads.timestamp END DESC
but that, I guess, maybe only looks at the first row and determines which one should be used so the order is not correct.
I'm not sure if it's possible to create a sort of variable that holds the value for each row of the timestamp that applies, if that's possible you could sort by that. For example:
(CASE WHEN last_reply_timestamp > threads.timestamp THEN last_reply_timestamp ELSE threads.timestamp END) AS last_activity_timestamp
...
ORDER BY last_activity_timestamp DESC
So each row has a field "last_activity_timestamp" containing either timestamp, whichever is the later than the other.
Can this be done somehow? How does everyone else solve this? It's so hard to search google because I just get lots of forums but no code.
SQL Server :: SQLCMD Timestamp Output File?
Oct 25, 2010I am using SQLCMD to execute a script and then output the results to a csv file. Is it possible to name the output file with a timestamp each interval that it is executed (such as every 30 minutes that the command is executed to timestamp like "output 10/25/10 830.csv"?
View 2 RepliesList / Show Text Which Timestamp Is > Or < Then Datetime?
Dec 1, 2010I have a question about lists. So let say i have a list with 2000 objects, object has a text and a timestamp. So i want to return the list and i wan to only show text which timestamp is > or < then datetime.now, that is example, yeah, so how should i do it better, faster? Ofc i can make another newList and then just circle tru the list and add to newly created list(newList) the items that i want to show, comparing the items timestamp, but it might take too much time and resources, is there an easier way? Cuz that list with 2000 objects can become bigger after some time.
View 3 RepliesDataSource Controls :: Get Profiles From Timestamp - 20 Seconds?
Mar 17, 2010I have a issue im trying to get though where my site while up useing a ajax timer ever 15 seconds to update there time stamp to say there still online and active. Its the best way i could think of to handle the are they online/did they just leave issue i was having. Any ways i dont know how to query the database with linq to sql so i guess i will do psudeo code like stuff and hopefully some one can offer some advice.
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DataSource Controls :: Linq To SQL Concurrency Control With Timestamp
Mar 29, 2010I added a column of type "timestamp" to a table in SQL Server to use for concurrency control. I deleted all my tables from the Linq surface and then added them back. I see that the "Time Stamp" attribute is set to True for the timestamp column and False for all the other columns. I also see that the "Update Check" attribute is set to Never for all columns, including the timestamp column.
After watching some demo videos and reading some tutorials, I had expected to have to manually set the "Update Check" attribute values on the columns - to Never for all columns but the timestamnp column where it should be set to Always. But, before setting the "Update Check" to Always on the timestamp column, I decided to test it the way it was, and Linq seems to be doing the right thing - it seems to be using the timestamp column for concurrency control correctly even with "Update Check" set to Never on the timestamp column.
So my question is - does the fact that "Time Stamp" is set to True trump the "Update Check"? Or is there any other reason one could or should set "Update Check" to Always on a timestamp column? Is there any change in behavior?
ADO.NET :: Retrieve A Date Time Value From TimeStamp Column Using Linq?
Oct 21, 2010I have a Timestamp column in my Table. I want to read the date time value and display in UI.
In Linq the Timestamp column is represented as System.Data.Linq.Binary.
I dont know how to retirve date time value in "MM-dd-YYYY" format from this Linq.Binary
- Why I am using Timestamp?.
I want to perform some operations based on the last modified date time of the particular row. Since I am using TimeStamp column in my Table as version column, It will contain the last modified date details, So i want to read the date time value from this time stamp column to do some other operations.
Visual Studio :: Visualizer For LINQ To SQL Throws Exception When Encountering A Timestamp - Rowversion In The Data
Jan 10, 2011This problem is trivial to duplicate. Do any query on a table which contains a timestamp / rowversion column. Set a breakpoint and examine the resulting query in the Linq to SQL visualizer. Click on Execute which displays the results in a DataGridView. For each row you get "System Argument Exception: Parameter is not valid" when it tries to display the timestamp / rowversion in the grid. What is most annoying is that there is no way to get out of the visualizer without going to Task Manager and killing the Visual Studio process, devenv.exe.
This is definitely a bug. How can you presume to be able to display a database query when you can't display an essential datatype like timestamp / rowversion? Is there any way around this ? I would like to add that in general the CLR is woefully inadequate in the way it handles timestamp / rowversion fields. It would be nice if they could be defined, copied, compared, displayed and serialized in some standardized automatic way.
