DataSource Controls :: How To Access Database Once With Big Resultset Or Access Multiple Times On The Fly
Jun 17, 2010
I have a situation where I am accessing a database multiple times and I'm wondering if it is necessary.
I have a GridView with a template column with a hyperlink to "Get Results" and on the RowDataBound event I have it check the batch number against the database and see if results exist and then if they don't, hide the link.
So when viewing the page if there is 20 rows in the gridview it is effectively doing 20 queries.
I was wondering if it is a better idea to query the database once with all "batches" and load it into a datatable, then on the RowDataBound event query the datatable. The only issue I see with this is there is currently 40,000 batches and grows daily.
View 1 Replies
Similar Messages:
Mar 16, 2011
A class in my ASP.NET website needs to access a database table multiple times for every request. The database table should rarely change, if ever. Maybe a couple times a month.
In the static constructor of the class, the table is fetched from the DB and cached in a static local variable. Whenever the class needs to access the table, then, it just uses the cached, static version.
My question concerns the lifespan of this cached, static version of the table.
I understand that it's fetched the first time the class is instantiated or a static method in the class is used. But how often does this occur on the web server? What if the table changes and we want to reset this static version of the table?
Basically, I'm wondering, is this table fetched once and then only refetched each time I restart IIS? What, with regard to the site and IIS, will trigger this static class to reset, causing the static table to be refetched?
View 3 Replies
Feb 26, 2011
I have a query which returns multiple columns from the database using LINQ
var donors = from d2 in db.Donors
where d2.Status == "Pending"
select new { donorID = d2.donorID, bloodGroup = d2.bloodGroup, contactNo = d2.contactMobile, status = d2.Status };
now I want to display the results in different Labels accessing one column value from donors resultset.
ex:
Label1.Text = donorID;
Label2.Text = bloodGroup; ...and so on
View 2 Replies
Feb 17, 2010
Is there anything missing in IIS 6.0 that prevents me from (Insert into table) using MS-Access?
Explain: The application works fine under Visual Studio 2008 IDE the insert into table works fine with no error, Also I tested with hosting provider and works fine with no problem. but now I have published the same exact app in a dedicated server windows 2003 with
IIS 6.0 .NET framework 2.0 with latest service pack I gave IIS_WPG write/modify access to the folder where MS-Access database is located and database but at the time of insert an error pop-up. I need to install in the Server or settings in the IIS to recognize my MS-Access db is it some office runtime that I am missing. (BTW I am using OLEDB connection string in my C# )
Using System.Data.OleDb;
I can retrieve data off of it with no problem but when I try to insert is when it fails I thought the problem was Access Rights but I do not think is the case.
View 4 Replies
Mar 17, 2010
I would like to write an MVC application that accesses multiple data stores (SQL Server, MySQL, Cloud based, etc.).Most of the examples I see use LINQ to SQL for their data access but I read somewhere that LINQ only supports SQL Server - it may have been an old post.I was wondering what the best way to access these different data stores would be. Can I use the Data Access Application Block from MVC to access these data stores?
View 4 Replies
Mar 3, 2010
Now I'm developing web application with ASP.Net MVC but I have to use 3 databases. So I have no idea about this. I have to extract the data from 2 databases and I have to save the data to another 3rd database.
View 7 Replies
May 18, 2010
How can i connect my local project with the SQL server 2008 Database that is running on other server (This server is not on my network and i connect to it via remote desktop connection).
View 1 Replies
Jan 4, 2010
If I have the appropriate permission, is their a way to access a sql server database on two different servers?
For example if I have a Table A on server 1 and Table B on a different server. How would I join the two tables together, if they each have a column named "PonyId"
View 2 Replies
Jun 4, 2010
I am creating an insert statement in my c# code to insert records to an access database table. I am getting the error copied below using c# code. When I copy the generated insert statement from the console and run this on my access database, it succesfully appends a record in the table.Insert statement generated:
insert into [Pet Fish-log 2010] ([Specimen Type], Year, [Lab Number], [Last Name], [First Name], [Middle Initial], Gender, [Date of Birth], [Collection Date], [Date Received], Client, [Tissue Type], [Block Number],
[code]......
View 3 Replies
Mar 5, 2010
I am using SQL SERVER 2008.
Now I want to access the SQL SERVER 2008 DATABASE on the LAN.
So what was the Connection String and can u give me the Example of that.
View 3 Replies
May 26, 2010
I am pulling a date from an Access Database and inserting into my Dataset. I am assigning it to "myDate" and then assigning it to my SQL parameter @StartDate.
When I run my ExecuteNonQuery I get a null value in my SQL database. There are no null values in my access database. I must have the syntax wrong.
[Code]....
View 4 Replies
Mar 12, 2010
In the development environment, in SSMSE > MyDatabase > Security > MyUser > Database role membership I have checked db_owner to allow me to build the database.
Now I am copying the database to the production environment I would like to lock the security down tightly. In the past (with classic ASP applications) I have only checked db_datawriter and db_datareader and, in Securables, checked Execute Grant on the stored procedures.
In Database > Securables I add my stored procedures and check Execute/Grant for each of them and click OK. When I return to the securables page the stored procedures are no longer listed.
I have noticed that nothing is listed in Effective Permissions and I think it should list Execute. If this is the problem, how do I add Execute to the Effective Permissions list?
View 1 Replies
Jun 9, 2010
In remote db, I can be able to connect ms sql db as localhost in my connection string like below,
<
add
name="ConnectionString"
connectionString="Data
Source=localhost;Initial Catalog=DBServer;Persist Security Info=True;User ID=sa;Password=*****"
providerName="System.Data.SqlClient"
/>
This is running in server and its working fine.
If i want to make any changes in db structure or need to modify any data values, i have to login remotely to my server and has to open sql server management studio do db change or value editing stuffs. Its really getting iritating when the remote machine looks slow.
I just want to know how to configure the db hostname like dbname.domainname.com or mssql.domainname.com in server, so that we can open the server db in local using sql server management studio.
The application installed in windows server 2008 and using IIS 7.0 & SQL Server 2008
I have only little knowledge in server.
View 6 Replies
Jan 5, 2010
[Code]....
I have a select statement that is supposed to be filling grid with information from an income table. It's only supposed to pull if the income is from the current fiscal year or is less than 1 year old. Currently, what it does is pull multiples of rows and also rows from past income years but only if there is a mixture. For instance, if a person has income from 2005 and 2010 what it will show is this
Income 2005
Income 2005
Income 2010
Income 2010
Income 2010
Does anyone know what I've done wrong? BTW, those results are exact, old income is shown twice, current is shown 3X
View 16 Replies
Feb 21, 2011
I am trying to delete multiple records from an access databse with ASP.NET VB but I'm doing something very wrong .....
Here is my code ...
[Code]....
I would also like to know once I get this working how I would delete, additional tables linked to this table by another field not ID ??
View 8 Replies
Jun 8, 2010
I would like to access the database through the code behind in C#.
Looking how to do this in VWD specifically. Does it go in a onload function? onclick? How does it work specifically in ASP.NET 3.5?
Using:
Visual Web Developer 2008, ASP.NET 3.5 with SQL Server Express 2005.
View 1 Replies
Jun 7, 2010
I have a music related ASP.NET web site which caches a lot of static information from the database on the first request.Sometimes, the application is reset and cache is cleared while the application is on heavy load and then all http requests go to the database to retrieve that static data and cache it for other requests.
How can I ensure that only one request go to the database and cache the results, so that other request simply read that info from cache and not needlessly retrieve the same info over and over again.Can I use thread locking? For example, can I do something like lock(this) { db access here }?
View 2 Replies
Jan 8, 2011
I want a piece of code for asp.net 3.5 using visual basic. and i am using MS access database.
I have two three text boxes and 2 image upload controls and a submit button.
I want a piece of code in which a user can upload images and store it in our database . i want an asp.net visual basic working code. also i need query behind the submit button.
View 4 Replies
Jul 8, 2010
I have to display data (names) in a random order on the website. The data is stored in a MS Access database. The names must be displayed in a GridView and DataList in different places. I have created a query in MS Access "zorder: Rnd([MarinaAccommodation]![ID])" which works fine in MS Access giving me a different order each time.
The problem is that when I try run it on the website the order remains the same, it does not change each time the page is loaded.
View 4 Replies
Jan 2, 2010
I am using ajax html editor to write a text. I can view it without having problem but I am incapeble of storing it in a Ms Access database. which type do I need to use for this? I tried memo and OleObject type and both didn't work. I used the blow code for that.
View 6 Replies
Jun 7, 2010
i am using the following code for a retrieving a image stored in access database
View 12 Replies
Jun 9, 2010
I have a data type mismatch while inserting into a number field in an access database using a parameterized query.I think this should be pretty simple but I am still learning a lot.
[Code]....
I have some commented out as I am working one field at a time. The working fields are textboxes and the non working ones are dropdown lists. But I think it may be the field that the list is drawing from? Not sure.
View 2 Replies
Feb 11, 2010
I have one question here.I created a registration form using asp.net and c#.
when I entered all the fields in that form and hit the register button the data will be inserted in to the database table called xyz table
in that table I have an id field which is a text field in access database consists of guid starting with letter P
when I inserting the data from aspx form...the guid is not inserting into the table.
one of my datarecord in that table with the id field is like this.(.P11111111-1BBB-4444-A9D1-111111111111)
need to insert anoother record in that table that field must be generate with the ID starting with P..its an guid.. the creating guid in the aspx.cs page..??
View 26 Replies
Sep 2, 2010
I have a form wilh couple of Drop downs and text boxes and a Data Grid View which displays data from Access Table. When I hit add button on the form, I can see the data being added to the Grid View. But when I close the form and open the Access Database File (.mdb), the respective table is empty. The Access Table is not being updated. Second time if I open the form, the Grid View is also empty.I am pasting my code here.
Public Class Home
Shared OleDbConnection As System.Data.OleDb.OleDbConnection
Shared ExpensesDataAdapter As System.Data.OleDb.OleDbDataAdapter [code]....
View 4 Replies
May 26, 2010
I want to retrieve a single column from a table in a database(ms access) and then the value retrieved has to be converted to a string!!
View 4 Replies
