Visual basic 2012 IgnoreCase on if textbox.text = ""

Question

How do I ignore upper/lower case letters this is my code : ``` if COMMAND_TEXT.Text = "command" then CONSOLE.AppendText("command entered!" & Environment.NewLine) else CONSOLE.AppendText("Invalid command" & Environment.NewLine) end if ``` I am making a simple console but when I try to enter : Command it doesn't find anything but when I enter : command it just executes the code I want. Do I have to make every possible text?? Like this : ``` if COMMAND_TEXT.Text = "command" then CONSOLE.AppendText("command entered!" & Environment.NewLine) elseif COMMAND_TEXT.Text = "Command" then CONSOLE.AppendText("command entered!" & Environment.NewLine) elseif COMMAND_TEXT.Text = "COMMAND" then CONSOLE.AppendText("command entered!" & Environment.NewLine) else CONSOLE.AppendText("Invalid command" & Environment.NewLine) end if ``` Or is there an other easier way like in Java EqualsIgnoreCase

Accepted Answer

I would not recommend upper-casing or lower-casing as others have suggested. That can cause issues in some cultures, particularly Turkish. Instead, use `String.Equals(String, StringComparison)`:

```
If COMMAND_TEXT.Text.Equals("command", StringComparison.CurrentCultureIgnoreCase)
```

You may want to use `InvariantCultureIgnoreCase` or `OrdinalIgnoreCase` - it depends on the context.

I'd also strongly advise you to avoid shouty names like `COMMAND_TEXT` and use more conventional names instead.

Visual basic 2012 IgnoreCase on if textbox.text = ""

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