Speeding Up Gridview Displays?
Mar 3, 2010
I'm making a program that runs on a timer, checks queues for new report requests, runs them, and then marks them as done.
I was asked to show the entire queue in a gridview instead of just the ones that haven't been run yet. Showing them all slows display down - blinks off, waits, and comes back on with each timer tick. Only a few people in house will see this prog.
Is there any way a vb.net program can be run as an exe and not accessed over the web to maybe make it faster ?
Is there any easy way to reduce the blink between redisplays ?
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Mar 4, 2011
Greetings, I have a following question. Suppose where are two tables in the database:
Clients(
id,
name,
address)
Orders(
id,
name,
desc,
datemodified,
client_id)
The second one references the first one, that is each order is assigned to the client. Now suppose I have an .aspx page with a LinqDataSource for Orders table, and a GridView that uses this datasource and displays a table with a following columns:
Order name.
Order desc.
Client name.
Client address.
As far as I understand, the Linq to SQL is designed in such a way, that by default it does not load any associated entities, it only does it when a child property is requested. So, when a page is loaded, the following situation will occur:
First query will retrieve the records from the Orders table. For each row displayed by GridView an additional query will be performed when one of the client properties is requested. Therefore, if we have 100 orders, this means will perform 101 queries instead of one (or even maybe 201, if a query will be performed for each client property)? How to avoid this and make LinqDataSource load all the required fields by a single query? Right now I see the only workaround for this problem - use an SqlDataSource with a join query, that will retrieve all required fields at once.
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Nov 18, 2010
I am working on a project that converts our enterprises code library so it uses the entity framework.
We use a ControllerFactory that "generates" controllers. These controllers contain the business logic of our enterprise. To avoid the problem of context conflicts (An object of one context that needs to be added to a new context, bla bla bla), we create a new Entity Context for each ControllerFactory we instantiate. All the controllers that are generated from the ControllerFactory use the same Entity Context for fetching and saving data.
Now, we have added a constructor to the ControllerFactory to make it Read-Only (Context.SaveChanges can't be executed) so it is a little bit safer and it doesn't save things we don't want to save when loading data to show to the user.
Then I started thinking about performance. Since the Context is never saved in a Read-Only factory, I have already disabled the state tracking of some Entities to speed things up.
But I wondered if we could improve the speed even more.
Since locking is not nescessary for only fetching entities, I would like the Entity Framework to add the WITH (NO LOCK) element to the SQL SELECTs it creates. But I Have found out that this only works when using transactions, and I can not use one transaction for the whole ControllerFactory.
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Apr 1, 2011
I am developing an ASP.NET where I need to display each purchase for every account in a GridView (so basically each purchase links to an account).
The problem is, we have over 6000 suppliers (granted, these can be filtered down to around 1000 which the customer will usually do), each of whom will have a few transactions. So you can imagine the time it takes to bind this data is very long - in fact, occasionally the SQL server times out. Sadly I cannot use paging, as all the data needs to be displayed in one page.
What I'm doing is similar to the code below (not at my machine so can't copy exactly)
IEnumerable<Account> accs = (from s in dc.Accounts select s);
foreach (Account acc in accs)
{
IEumerable<Purchases> purchs = (from s in dc.Purchases where s.AccountID == acc.ID select s);
double 30daysval;
[Code].....
Is there a faster way of doing this, perhaps using join's in LINQ or something? I know this may be a bit hopeless seeing as the data involved is huge, and that displaying a couple of thousands rows on a single page is fairly absurd, but that's what I've been told to do...
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Jun 30, 2010
why classic asp pages run so much faster than consuming a web service in .net?
I have a classic asp page that consumes a web service like so:
[Code]....
I run a log of every transaction and the time from call of the page to finish is ALWAYS between 1 and 2 seconds.However, when I try to consume the web service through .net like so:
[Code]....
This way takes on average at LEAST 10 seconds. Sometimes less, but not often.
I guess I just assume it should be the other way around. How can i speed this up? Seriously, don't make me stick to classic asp pages!
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Feb 16, 2010
I have a website that displays information from my database into a gridview. The gridview has a checkbox, that once selected, is suppose to move a 'Y' into the field that has the checkbox selected. I have it generating the code, and displaying the code on my page to confirm, but the database is not being updated. Here is my code,
[Code]....
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Apr 15, 2010
I'm using a gridview to show numerous artists. My query gets all the records I need, but when i bind it to the gridview the gridview shows only one record. I'm also using paging and sorting. The paging is not visible. The sorting works fine. But it still returns only one record. for example: first the record is Allan --> when i sort i get the record --> Zofie. This means that all my records are inside the gridview. Why does it only show one? My pagesize of the gridview is set on 10.
I have got a recordcounter above my gridview that shows the exact number of records that are present in the gridview for example (showing 1-10 out of 231 records).
This is my layout code:
[Code]....
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Sep 3, 2010
I have a gridview connected to a sql database that allows the user to delete the record. I used the ASP.net automatic "options" for this. However, I would like when the user deletes a record, a message (textbox) appears in the form to say the record has been deleted.
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May 18, 2010
I ahve a gridview and itemtemplate in which I have an URL field from the database. When I clicl on this URL, it should open in another browser the URL that we clicked on.
<asp:TemplateField
HeaderText="Website"
SortExpression="Dev_Company_City">
[code]...
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May 7, 2015
Building an application on responsive design.
Is there a way to convert Gridview to responsive?
So that it should match with design.
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Dec 17, 2010
I have a gridview which is fairly straight forward... I've added paging to the gridview which functions correctly. However, after clicking any one of the page buttons (next page/last page), it appears some sort of a label is being displayed in my web form saying "NewPageIndex: 1". This changes from page to page displaying the actual index of the page. Why is this displaying? The only thing i can think of is the size of my gridview (Right now set to 1500 lines per page) . here is my gridview control html code:
[Code]....
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Jan 8, 2010
Can you filter gridview? For example, after the search returned, it displays many members. I would have a dropdown menu that says "Online ONLY" if the user selects that option, my gridview will be updated and only displays "online users" only. Is it possible?
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Jul 22, 2010
[Code]....
There is a value being returned for this variable, but it never displays on the screen.
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Jan 17, 2011
In ASP.NET web application, by default even I have not logged in displays my computer name. When I click on logout, no any effect. How I login with different username on my localhost if it not displays as logged out.
In above image, my computer name is being displayed by default. How to remove such?
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Mar 15, 2011
On windows server 2008 can I have a web service or something I can query from a C# application as to the display properties (resolution (height & width)). The C# application does not run on the server so I cannot just detect it from the application itself.ddition to help explain why:I will have a user named "display" and that will be logged on displaying a website (on the server) and I want to be able to check the display from the desktop application so the user knows what resolution to design a template for. The resolution will change from different displays so it can't be a set value
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Apr 16, 2010
Here is my code: <asp:ImageField HeaderText = "Picture" DataImageUrlField="PictureLoc" DataAlternateTextField="AlternatePicLoc" NullImageUrl="~/ProposalImages/noimage.jpg" ReadOnly="true"></asp:ImageField>
Now the above code only works if the Picture is "null"
How can another image to display instead of that ugly red X if the image is not found. The DataAlternateTextField just displays the red X with the text that is there...
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Oct 21, 2010
I have a DropDownList displaying around 75+ values and it shows a scrollbar. The problem is when the page displays the DropDownList, I can't scroll to the first few items in it. It kind of goes outside the explorer.
The only way I can get to it is by downsizing the page using maximize button and then access the list. I'm using VS 2008.
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Nov 1, 2010
I have a customer requirement where they would like to have different windows of a web application on 2 different displays (monitors): data lookup and entry on one screen and a document viewer on the other. The document viewer will be Flash or Silverlight based and loaded in a webpage. The app will be at least partially based on SharePoint. There is a need for communication between the two windows: when for instance a new task is clicked in the "data" view, the accompanying document needs to be opened in the other one.
The difficulties as far as I can determine:
[code]....
I understand that I can launch the second window from Javascript, but that does not give me a lot of control over it. This solution will run in a closed, controlled environment, so limiting the solution to a specific browser (preferably IE8+) or the need to install additional software/components is no problem.
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Mar 18, 2011
How can I displays currency value in US culture format like $5,123,456.55. I know that I can do it using ToString method but don't know how?
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Mar 2, 2010
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The source code of the webpage gives me the following adress to the image:
<img id="ctl00_PH1_Image1"
src="Images/red.gif" alt="boo"
style="border-width:0px;" />
The code I used for siplaying the image is:
<asp:Image ID="Image1" runat="server" AlternateText="boo" ImageUrl="~Images
ed.gif" />
My project structure is as following:
Guardian (Project name)
Login.aspx (tries to display the image) Masterpage Images (folder)
red.gif
etc..
I have tried manually changing the relative path to image in several ways, but nothing seems to work.
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Jan 15, 2011
An image on one of my pages renders as...
[Code]....
The first one displays fine locally but not on the Web server, whereas the second one displays fine both locally and on the Web. How do I get the first to resolve like the second? In the database, I have the reference prefixed with "~/i/" so it's puzzling to me that it would resolve to some other form.
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Aug 17, 2010
I have developed a site using the TreeView control in Visual Studio 2008.When I try to run it, it only displays lines of text, with no treeview formatting.Is their something obvious I am missing here?
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Nov 10, 2010
On my site, I display an image after the user clicks on a thumbnail (opens in a lightbox). I want to store the number of times users open the images.
I was thinking of something like pointing to an ASHX page that generates the image and updates the DB with the view count, but this can't be done since this is a remote file from a CDN. I can't just count the thumbnail clicks, since the image opens in lightbox.
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May 19, 2010
I want to format a number when it displays in a textbox.For example if it is 1234567.0000 in database, it should be displayed as 1,234,567 in my textbox.I tried the below one but its not working.textbox1.text = String.Format("{0:0,0}", dt1.Rows(0).Item("Volume"))
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Apr 26, 2010
In the following question, I am using C# and ASP.NET 3.5:I am having a problem with a gift certificate program which requires a way to have the user retrieve a unique validation code consisting of the first 9 digits of a random GUID and the date and time. I have a page that has a button which creates these labels perfectly, but I can't figure out how to bind them to the certificate being validated This is the page described above:
[Code]....
I am open to calling another page called via a hyperlink like so:
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