A while back, Duane wrote an article in this forum detailing how to do an ajax postback that resulted in the Excel document downloading. It was quite good and pretty deep, but I never got a chance to implement it.
Now I am back to try it, and I can't find the article. It looks like somebody cleaned out the forums, deleting some good content in the process.
Can somebody please retrieve it?
And can somebody please give your developers someplace they can post this kind of stuff without worrying about a moderator deleting it?
While the article doesn't appear to be publicly visible (can't find it through search or by browsing the forum), it is available by direct link.
Here is the link, if it's helpful to anyone else.
http://forums.infragistics.com/forums/t/55904.aspx
Thanks Duane! Keep it coming!
Wow, this is doubly cool... it solves another issue I have been having as well, trying to export large datasets with the WebexcelExporter.
Right now, there is no such statement as WebExcelExporter1.Export(myworksheet).... or WebExcelExporter1.Export(myDataSet)... or WebExcelExporter1.Export(mySqlDataReader)... (feature requests there, hint hint).
This article shows how to take the Worksheet object directly to the response stream without the WebExcelExporter.
A person could modify this code to accept a simple sqldatareader, minimizing memory requirements for exporting large datasets. Speaking of large datasets, I bet this is faster than WebExcelExporter too.
I understand. I don't need to make a decision on this today, just sometime in the next week or so.
Also, one thing I didn't mention, but something your engineers might want to look at...
When I populate the Worksheet using the Tasks.Parallel.ForEach loop, it will occassionally throw an "object no found" error trying to fill the cell. That is why it is in a "try-catch" clause. So after export, there are a handfull of cells that didn't populate. That's probably something they will want to fix...
Thanks, - Rob
Hello Rob Hudson,
When sending in examples for using try and catch is not be good practice to send without providing code on how the exception is being handled in the catch block. The main reason is because it makes it difficult to debug and knowing whether an exception has been thrown. Most likely it would not be necessary to add try and catch blocks because the targeted application type would simply provide information about the exception details to the user.
As far as the usage of "Tasks.Parallel.ForEach" function my knowledge is limited in this area and also threading. It would be best for our engineers to take a look at the sample provided using a console application type when using the Infragistics.Documents.Excel library because it is not required to use in the ASP.NET platform.
Let me know if you have any questions with this matter. Thank you.
Understood... Duane, the reason I didn't have handling for the try/catch block is that my intent was to just ignore the error... I was just trying to get a build time.
I understand (while being surprised) about it not being thread safe. I will submit a feature request.
Thanks for the update on the thread.
For the performance improvements on using the Excel library I have logged bug id 89817 on this using the sample code that was provided in this thread to have our engineers look into this. Also private case CAS-72672-JNFCD2 has been created and you can find this case number in the support activity page here: https://es.infragistics.com/Membership/MySupport.aspx.
Just pinging you guys to see if there has been an update to this issue for the next release.
I am experiencing more pressure from the client to have a solution, and I need to know whether I should wait for Infragistics.
The fix for development issue 89817 is now in the latest service release. You can download within My Keys & Downloads page.