Sorted TStringList error - Operation not allowed on sorted list

Question

I am getting the following error - "Operation not allowed on sorted list" ``` Idx:= Customers.IndexOfName(ListView1.Selected.Caption); Customers[idx]:= Edit1.Text + '=' + Edit2.Text + ',' + Edit3.Text //error occurs here ``` Is there any way around this? other than writng my own routine to get the index value thanx

Accepted Answer

Writing your own routine to get the index value obviously won't help since that's not where the problem lies. You're not allowed to directly modify an element of a sorted list because doing so might invalidate the sort order.

Delete the item from the list and insert the new item.

```
Customers.Delete(idx);
Customers.Add(Edit1.Text + '=' + Edit2.Text + ',' + Edit3.Text);
```

Or, set `Sorted := False`.

Sorted TStringList error - Operation not allowed on sorted list

Solution

Problem