CODEWITHSUNDEEP
c#iosxamarin
Tony
Tony

Reputation: 61

How to disable space character in a text field in ios xamarin

I don't want to allow to enter space in display name field.

For example if the user types the name like this " Name" or " Name" or " Name ", the end result should be "Name" eliminating the spaces.

I tried this approach but the trim doesn't seem to work.

NameText.EditingDidEnd += delegate {
            char[] arr = new char[] {' '};
            NameText.Text.TrimStart(arr);
            ScrollPageForKeyboard(false);
        };

Upvotes: 0

Views: 2010

Answers (3)

SushiHangover
SushiHangover

Reputation: 74174

I would suggest preventing the user from actually entering whitespace versus removing it after they all ready have.

Add a ShouldChangeCharacters handler and check to see if they are entering any characters in the whitespace character set as defined by NSCharacterSet.WhitespaceAndNewlines

NameText.ShouldChangeCharacters += (UITextField textField, NSRange range, string replacementString) =>
{
    foreach (var aChar in replacementString)
    {
        if (NSCharacterSet.WhitespaceAndNewlines.Contains(aChar))
            return false;
    }
    return true;
};

Upvotes: 1

awh112
awh112

Reputation: 1484

Using the String.Trim() method should work nicely here:

NameText.EditingDidEnd += delegate
{
    var trimmedName = DisplayNameText.Text.Trim();
    ScrollPageForKeyboard(false);
};

You could also use a Regex to replace all white space completely:

NameText.EditingDidEnd += delegate
{
    var trimmedName = Regex.Replace(DisplayNameText.Text, @"\s+", "");
    ScrollPageForKeyboard(false);
};

Upvotes: 1

Dave Smash
Dave Smash

Reputation: 3001

If you just want to remove leading and trailing spaces (" Name" or "Name "), then use:

DisplayNameText.Text = DisplayNameText.Text.Trim()

as recommended in the comments. If you want to remove all spaces ("John Smith" = "JohnSmith"), then use 

DisplayNameText.Text = DisplayNameText.Text.Replace(" ", "")

to remove all the spaces.

Upvotes: 2

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