Program stops responding after clicking on information in Data Grid View

Question

每次我点击数据网格视图程序中的任何用户时，都会停止响应并给我一个错误，告诉我“System.ArgumentOutOfRangeException：'索引超出范围。必须为非负且小于集合的大小。Arg_ParamName_Name' “向我显示此错误的部分是

VartotojoID.Text = VartotojuDGV.SelectedRows[0].Cells[0].Value.ToString();

Answer 1

Try

VartotojoID.Text = VartotojuDGV.SelectedRows.Cast<DataGridViewRow>().FirstOrDefault()?.Cells[0].Value.ToString();

Updated Old Collection you'll need to cast first sorry