Value of '0' is not valid for 'index'. Parameter name: index

Question

hi, How to handle this following exception, C# InvalidArgument=Value of '0' is not valid for 'index'. Parameter name: index Thanks

Vulpes · Answer

This error generally occurs if you're trying to access the first element of a List or a List control (such as ListBox or ListView) which is currently empty. If this could happen in your application (because of removals etc), then you can avoid the error by checking that the List's Count property is greater than zero before attempting to access the first element.

Sumit Jolly · Answer

something e.g., will help you List t=new List (); //before you access variable check if(t.count() > 0) return t[0];

Abhay Shanker · Answer

If the error you see occurs on that line, which means the SelectedItems collection of either listviews is empty. You will need to test the count to make sure it's > 0 first before getting the selected item at index 0.

Ammar Shaukat · Answer

my count is > 1 . but i'm still getting this error . i've been totally sucked.

Abhay Shanker · Answer

Please share more details.The line of code , you are getting the error.

Munesh Sharma · Answer

please write code, i m not getting enough.

Lakshmanan Sethu · Answer

Hi In which line are you getting the error message?

Value of '0' is not valid for 'index'. Parameter name: index

Answers (7)