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[papa1980]

hello I have one ddl("DropDownlist") and i whant it to execude some function befoure is change index how to do that??? pleas help me

[russellsoft]

This function must run at client or at server?

[papa1980]

on server

[russellsoft]

View state attaches after page load... Old and new View states are comparing and generated events of index changing... You can add to your page HtmlInputHidden control and on client on oncange event write selected index into value of hiddenfield... On server you can save in indexchange event of ddl into some variable... Then on Page_Load (in the end of it) you can compare saved index and value of HtmlInputHidden control... If they are different that you must run your function... So you will run this function before indexchange event on server...

[papa1980]

how to done event indexchanging

[russellsoft]

I didn't understand, what you mean? I wrote 'indexchange' - I mean SelectedIndexChanged event on Server 'onchange' - The same event on client (using JavaScript)

[papa1980]

yes i allrady have it.But i give u example i have printer namer Canon,Hp,Epson and models deskjet 600,500 .... but for example when i change cannon index to hp i still have it models for hp if i done one more changes i get hp i think is happen delay with one turn how to solve it???

[Ista]

the value doesnt change until after the postback event runs through. Then your select index changed event is fired and the valueis changed then. like he said. do MyControl.Attributes.Add("onchange","javascript: document.getElementByID('MyHiddenControl').text = document.GetElementByID('MyControl').text;"); then in Page load you can access its value through the hidden control 1 line of code equals many bugs. So don't write any!!