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Operator '==' cannot be applied to operands of type 'LayoutOptions' and 'LayoutOptions'

mshwfmshwf EGMember ✭✭✭
edited December 2017 in Xamarin.Forms

I'm trying to make a loop statement on the HorizontalOptions of a CustomGrid, first I used switch:

switch (HorizontalOptions)
                {
                    case LayoutOptions.Start:
                        HorizontalOptions = LayoutOptions.End;
                        break;
                    default:
                        break;
                }

but it says a constant value is expected (I feel I'm missing a very basic rule of C#!)

then I tried with if statement:

if (HorizontalOptions == LayoutOptions.Start)
                {

                }

The error now is:

Operator '==' cannot be applied to operands of type 'LayoutOptions' and 'LayoutOptions'

Tagged:

Answers

  • ShantimohanElchuriShantimohanElchuri USMember ✭✭✭✭✭

    @mshwf "HorizontalOptions" is property that describes an Object. It is not a variable or an Object by itself. Say if you are trying to check the value to which HorizontalOptions of a TextBox named say "TextBox1" then try as below:

    if (TextBoz1.HorizontalOptions == LayoutOptions.Start) { }

    Also you can use it in switch too:

    switch(TxtBox1.HorizontaOptions)
  • JoeMankeJoeManke USMember ✭✭✭✭✭
    edited December 2017

    The type LayoutOptions is a struct, not an enum. LayoutOptions.Start, etc., are static properties (like DateTime.Now), not enum values. That is why you cannot put it in a switch statement. Also, the == operator must be overloaded by the struct to work, which Xamarin did not do.

    Instead, you can switch on its Alignment property which is an enum.

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