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Question by nethsajo1998 · Mar 03, 2019 at 01:38 PM · c#uiresolutiontextmeshdropdown

Remove specific screen resolutions

Hey guys. I am trying to remove some resolutions in my dropdown menu. I want to remove because I will not use it. This what I did (see code below) but I got this error: ArgumentOutOfRangeException: Argument is out of range. Parameter name: index System.Collections.Generic.List1[TMPro.TMP_Dropdown+OptionData].get_Item (Int32 index) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Collections.Generic/List.cs:633) SettingsManager.OnEnable () (at Assets/Scripts/Settings/SettingsManager.cs:38)`

What I've tried:

 resolutions = Screen.resolutions;
 foreach (Resolution resolution in resolutions) {
         for(int i = 0; i < resolutions.Length; i++) {
            if(resolutionDropdown.options[i].text == "320 x 200") {
             resolutionDropdown.options.RemoveAt (i);
             break;
            }
         }
         resolutionDropdown.options.Add(new TMPro.TMP_Dropdown.OptionData(ResolutionToString(resolution)));
  }

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avatar image Cahir · Mar 03, 2019 at 08:10 PM 0
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That's because you are iterating resolutionDropdown.options and removing from it in one loop, also you are adding to dropdown at the end, so in first iteration there are no values, so this "for" will throw exceptions because resolutions.length is not same as resolutionDropdown.options length. Also try to refactor this function, because this "for" in "foreach" looks a little bit unclear. I think you can just add "if" before adding to dropdownlist in this first foreach. Like:

  foreach (Resolution resolution in resolutions)
             {
                 if (resolution.width != 320 && resolution.height != 200)
                 {
                     resolutionDropdown.options.Add(new T$$anonymous$$Pro.T$$anonymous$$P_Dropdown.OptionData(ResolutionToString(resolution)));
 
                 }
             }

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