dynamic display of a control depending on condition

Question

Dear friends! I have following problem. I have one data list in which there is one image and one label. Now I have two conditions and depending upon which i have to perform two different operatoins on this datalist. Like say in one condition i have to open one pop up onclick of this Image and in another condition i want to just redirect to other page onclick of this image. so at runtime i have to decide and depending upon the result i have to carry out two different operations on this image. My problem is not how to decide.I have a criteria to decide this but how to show this at runtime to this image on the front end? please help.. regards.. kash

Administrator · Answer

If you know the condition when databinding you can write appropriate javascript onclick event for the control. But I can't help more as I don't know your criteria and conditions.

Administrator · Answer

No in my case Itemdatabound event can not be used as I have to have link to all the controls in teh datalist and depending upon the condition I have to open javascript pop up or redirect it to other page. so even if at the time of databinding if i determine the condition how to show it in the frontend? this is the problem.. Thats why i have used this Itemcommand event.

Administrator · Answer

ItemCommand is meant for... commands that somehow interact with the datalist (my interpretation). As I think you are about to do javascript commands (open popup redirect etc) IMHO it is better to do this in ItemDataBound event. So check the criteria for each row when creating the page and each row will have the right command already :)

Administrator · Answer

Dear friends! Thanks for your reply. Actually i have used the Itemcommand event of the Datalist. I didn't know about this event. You can use this event whenever user clicks on any of hte control of the datalist then this event gets fired. Only the isssue is that for this event we can use only three controls as imagebuttonlinkbuttonbutton controls. Now i have used this event to check my condition and depending on it I am doing my further processing. Thanks and Regards.. Amol

Administrator · Answer

What is the criteria how do you know which operation todo? I think it's not good idea to add all possible controls... how do you then decide which to hide ;) I think you need to override ItemDataBound event of the DataList.

Administrator · Answer

Hi A rather quick and nasty soln is to have all the possible controls on the page but set to be invisible. Preferably in your page_load do the checks and then set the relevant controls to visible? Cheers