Solved

Can I set a DetaiView control's datasource at runtime?

Posted on 2011-09-30
5
369 Views
Last Modified: 2012-08-13
Hi, i'm using asp.net 3.5 and C#.
I have a web page where I display all items in a gridview control whose Auto-generate Select is enabled.  When a user selects a row(item), I save the item id in session using the Gridview control's Select event.  After the user selects an item and then select Detail in the menu bar, this will take them to the item's detail page where I have a DetailView control.  

I create a sqldatabase in the Page_load event when it's !IsPostBack.  Because I have to get the itemid from the session variable so i can only do this at runtime.  Is this the best way to do this?  I get a runtime error about I didn't set the datakey field.  but when I tried to do this in backend code I get tooltip that his field is read only and not for assignment.  What am I doing wrong here?  Thank you.
0
Comment
Question by:lapucca
  • 3
5 Comments
 
LVL 2

Accepted Solution

by:
yogsoft earned 250 total points
ID: 36896869
I think what you are doing is correct, however there is another way of getting Previous page value using "PreviousPage" attribute to get selected itemid.

Regarding DataKey error. DataKey property has to be set at design time in aspx/ascx.

Hope this has helped you understanding DataKey error.
0
 
LVL 4

Assisted Solution

by:Friman001
Friman001 earned 250 total points
ID: 36896896
What you can do is pass the variable through the Query String.  When you redirect to the Item Detail's page, just add "...aspx?ItemId=19387459273" So:
string itemId = 19387459273;
Response.Redirect("~/Item/ItemDeatil.aspx?ItemId=19387459273");   
// or the following
this.HyperLink1.NavigateURL = "~/Item/ItemDeatil.aspx?ItemId=19387459273";

Open in new window

.  Once you are at the Item Detail's page, you can pull that variable out and use it how ever you want by using Request.QueryString["ItemId"].ToString().
0
 
LVL 4

Expert Comment

by:Friman001
ID: 36896901
Opps.  I should be
"~/Item/ItemDetail.aspx?ItemId=" + itemId

Open in new window


Sorry
0
 
LVL 4

Expert Comment

by:Friman001
ID: 36896913
I guess not getting the strong coffee this morning was a bad idea.  You want to save the itemId as an int probably and then convert it to a string when you add it to the end of the URL.  Then, when you pull it back out of the Query String, you can convert it back to an int.

Hopefully I am leading you where you were looking!!!
0
 

Author Comment

by:lapucca
ID: 36897574
It doesn't matter I put it in the url as parm or store in session my question here is setting the datasourde for the viewdetail control.  I created a sqldatasource control at page_load event.  Anyway, please read over again my question.  Thank you.
0

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction Hi all and welcome to my first article on Experts Exchange. A while ago, someone asked me if i could do some tutorials on object oriented programming. I decided to do them on C#. Now you may ask me, why's that? Well, one of the re…
Performance in games development is paramount: every microsecond counts to be able to do everything in less than 33ms (aiming at 16ms). C# foreach statement is one of the worst performance killers, and here I explain why.
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

803 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question