Need help in parameter

Question

Hi all Pls somebody explain me with simple example what does the ref out and params keyword do in c sharp?? And what does actually do postback and autopostaback method in asp.net with an example??? And if (!IsPostBack) what does it mean???? Pls somebody clear my above query... Thanks Sumit

Bhushan Sahni · Answer

Autopostback is a property of the ASP controls. if this property of the control is set to true it will render the page to the server and the page will perform a load event. At this point the code written in the PageLoad event will execute again and again so if we want to avoid the some/whol PageLoad event code to be executed everytime we wrtie it in the if condition. Eg. if (!page.ispostback) { . . . . . }

Danatas Gervi · Answer

about params - this is the sintax sugar - example: if you needs to send in function parameters the varios number of objects you must write void myFunction(object [] manyValues) { // code } { object [] mVal = new object[] {firstVal secondVal val45mess23}; myFunction (mVal); } but if you will use params keyword in void myFunction(params object [] manyValues) { // code } { // you can call the function more simple myFunction (firstVal secondVal val45mess23); ) The array will be created by compiler automatically. * note - params argument must be last parameter in function.