Binding Programmatically Vs Object Data Source For Performance?
Nov 16, 2010
I used bind all GridViews, DetailViews etc. on my page using an ObjectDataSource (unless it wasn't possible to do so). Recently, I've started binding all my contols programatically. I find this a lot cleaner and easier, though some may disagree. Binding with a ObjectDataSource obviously has it advantages and disadvantages, as does doing it programatically.Say I bind a GridView programatically (e.g. GridView1.DataSource = SomeList), when I change page on the GridView, I have to also code this. Each time the page changes I have to call GridView1.DataSource = SomeList again. Obviously with a ObjectDataSource I don't need to do this. I normally stick my SomeList object into the ViewState so when I change page I don't need to hit the database each and every time.
My question is: Is this how the ObjectDataSource works? Does it store it's data in the ViewState and not hit the database again unless you call the .Select method? I like to try and get the best performance out of my applications and hit the database as few times as possible but I don't really like the idea of storing a huge list in the ViewState. Is there a better way of doing this? Is caching per user a good idea (or possible)? Shall I just hit the database everytime instead of storing my huge list in the ViewState? Is it sometimes better to hit the database than to use ViewState?
I've posted the same question in the Object Data Source forum. This is a link to it http://forums.asp.net/t/1554083.aspx. Maybe I should've posted here to begin with. There seemed to be some overlap so I wasn't sure which was the best on to post the question in.
I'm trying to get a better understanding of how I could've designed my app so that the Object Data Source could work with the properties of my business objects. Please read the other post to see how it's currently being done. Sorry for the link to the other page. I didn't want to post a bunch of duplicate information. I would love to get some suggestions for alternative ways of doing this.
I am using gridview. In which i m entering some value in textbox in Gridview.According to that value, i m generating datatable and binding it to the Gridview(Child Gridview).But when i m doing this, the performance of the page is very slow. How do i improve the performance.
1) How to bind this xml Using DOM Model to GridView from serverside? I don't want to pull xmldatasource and gridview with columns on FRONT end(aspx).
2) How to dynamically bind the nodes DesignDate, SoldDate....as columns to Gridview, coz there can be many columns with different column names and I don't to specify by saying: HeaderText="DesignDate". I would like to generate this dynamically from serverside.provided with a code to make this working.
I have a DetailsView with some templates. I would like to bind a textbox in one of the templates to a field of a datasource which is not the datesource of the DetailsView. What is the syntax of the Bind() or Eval() code expression to do this, assuming it's possible?
Also where can I find some material on syntax of these "code expressions" and what can be in them?
I realize I'm missing something pretty basic here...
Traditionally with an Object Data Source, the wired up class will have its public properties available for binding (i.e. Gridview columns, etc.) which works well. But what if one of my wired up business objects has a property that is an object itself; can I drill down to a property on that object property and still use it?
So in additiona to the traditional:MyBusniessObject.OrderID...I want to use:MyBusniessObject.Customer.NameID Your 1st response might be to just wire up the 'Customer' class, but I need properties both on 'MyBusinessObject'and 'Customer'. I do not think this can be done, as the ODS will not display properties on an object instance property. I have tried manually typing in the drilled down value as well, but that wasn't a success either.
I have a GridView or DetailsView and its bound to a CslaDataSource.I noticed that the "Object_Select()" event is fired automatically with every time the page is loaded or refreshed.How I can perfrom mnaual biding between the DetailsView Control and CslaDataSource ?I want to control binding via code using the DetailsView.DataBind() method in certain cases only.
I think I'm getting mad here...I thought this should be super simple, but I just can't figure out how to do that.This is what I'm trying to do:I want to create an rdlc report using the ReportViewer control in ASP.NET 4 (VS 2010), and, as its datasource, use a class with some properties.I tried everything I can think of, but I just can't figure this out. All the docs I found state that the object should appear in the DataSource pane of the website, but I can't make it appear there.I would like the fields of the class to appear in the report desiger so I can use them - but I can't do that either.Using the designer, I can only define new dataset - I don't want to use dataset, but business objects!So - how can I do that? Do I have to use some kind of DataSource control? How can I make the report designer know about the business object?
I am writting a website using .net in some of my pages I need to use datagrid for showing some datas and for binding my data to datagrid I use object datasource something like below :
//this is public class userData { private long userid = 0; private string username = null;[code]....
and then in my apsx file I put an objectdatasource and bind the select statement to the GetUsersAmount() and then bind obejctdatasource to my datagrid but I think the way I've chosen is not efficient I just want to hear about your way of doing such these things.
I set up a DAL layer in a dll. This had a couple poorly named methods such as GetData(), which is the default name offered up in the tableAdapter wizard. I also added a few other methods for various reasons, all with better names. I then built the dll and referenced it in an ASP project. On one page, I added an ObjectDataSource, and set it to that tableAdapter (which isn't what I wanted to do, but that's a different story). Under the Select tab, I see the GetData and the other methods. Under the Update tab I see a variety of Update methods. Under the Insert and Delete tabs....I see the same methods as I saw under the Update tab. The Insert and Delete methods that exist for the tableAdapter were not available.
I figured that I did something wrong, and I didn't like that GetData name, so I went back to the dll and changed some things around (I think I added an Insert and Delete method, but by now I can't remember, except to say that I wasn't all that surprised not to see those two methods the first time). I also changed the GetData name to something else, then rebuilt the dll.
Since that time, I have yet to be able to change what shows up in the Object Data Source configuration. The Select adamantly insists on the GetData method, which no longer exists under that name, while the other three tabs all show a variety of Update methods, but neither Insert nor Delete. I noticed that just adding a reference didn't have any impact until the ASP project was built, which moved the dll to the bin folder where it needs to be for the Object Data Source configuration wizard to see it. Therefore, I deleted the dll from the bin folder, then rebuilt. I've also removed the reference, deleted the dll from the bin folder, rebuilt, added the reference, rebuilt again to get the dll back into the bin folder, and anything else I can think of. It still seems to be retaining the original schema from the tableadapter without ever updating to the new name for the GetData. Since that hasn't updated, the rest doesn't surprise me.
I am developing on application in that i have taken one list box and getting data to it using an object source.up to this stage it is fine.I need to compare these value what i get into list box and need to represent data in to a report viewer ..how to get these values from objectsource.i m new to c# i placing the code.
I am using Object Data Source to bind data in the gridview. I haveset the property AllowSorting=true. While running the application, Icould sort the data only in ascending order. Is there any way toachieve two way sorting in gridview ie. both ascending and descendingon successive clicks ?.
just for an asp:TextBox element. What I want is that on submit to have the new values inside the binded object and I don't want to manually read and set the values.
I have an object data source that is being used by an rdlc report, and the object data source uses a filter that is built from session variables passed to the page.
The report displays correctly, with the filter applied; however, I want to mark each of the rows as "printed" in a bit field in the database table.
In the table adapter, I have the following Update command that is used by the object data source:
UPDATE dbo.WorkOrder SET boolWorkOrderPrinted = 'True' WHERE (WorkOrderID = @Original_WorkOrderID)
I have a gridview with all columns read only except one. I want to configure the update method for the object data source to update only one column. The code i have written works when i make all columns editable but fails when i try to make only one column editable.
I am playing about just now trying to teach myself a little bit about the entity framework. I have a Gridview data bound to a Entity Date Source using the Entity Framework. If I select certain items in that list I then wish to redirect another page and populate another gridview with just the items selected (but with more detail, different includes/navigation properties)
This is probably the most simple thing but I have spent 2 hours banging my head on the wall trying to get this to work. Essentially I have a continue button which when clicked should identify all the UIDs (a column in the gridview) of the rows and allow me to subset to just these rows and pass them to another page to be rebound to another datagrid
I have extended GridView in order to have consistent look & feel, paging and sorting. However, when the page is first time loaded, the select method is getting called twice. It works fine when i move between pages in pagination.
i wanted to retrieve things from the data base and perform mathmatical operations on it then post it to the user, so i was told to use the bullited list and bind it to the object dataSource
my query is SELECT a.HD, a.HEAD, a.SH, a.SUBHEAD, a.TRK, a.TRACK, a.TGT, a.TARGET, a.PDC, a.DT_RELEASE, a.STATUS, a.CO FROM V_HIERARCHY1 a
my data is ,HR HR Rec Records Leave Leave Records HRL.0001 Policy and Process for leave record. 27.06.2010 30.06.2010 WIP Edlink HR HR Rec Records Leave Leave Records HRL.0002 Quarterly Review 01.07.2010 04.07.2010 Planned Edlink HR HR DB Database SAL Salary DDS.0001 Calculation of Monthly salary 08.08.2010 09.08.2010 WIP Edlink HR HR Rec Records Ind Induction Records HRI.0001 Completion of dossiers. 08.07.2010 10.07.2010 WIP Edlink HR HR DB Database Emp Employee HDE.0001 Offer letter 06.07.2010 09.07.2010 WIP Edlink
