Replace text in array of objects, bug in VB.NET?

Question

I have written a function replacing text within, for example, an array of textboxes.

The function:

Protected Sub Replace(ByVal c1 As Char, ByVal c2 As Char, ByVal ParamArray fields() As TextBox)

    For Each field As TextBox In fields
        field.Text = field.Text.Replace(c1, c2)
    Next

End Sub

Called by these codes (both have the same output):

Replace(" ", String.Empty, _
            TextBox1, _
            TextBox2 _
            )


Replace(" ", "", _
            TextBox1, _
            TextBox2 _
            )

Input: foo bar

Output: foo

Exptected: foobar

Why does it replace all text after the space instead of just the characters I'm giving it?

You should use Option Strict On to avoid implicit conversions. To make a enclosed quotes char act like a char insted of string use this: " "c — Antonio
– Antonio, Commented May 2, 2014 at 11:44
Minor point: you're using " " as the find part of the replace, instead of c1. — Jon Egerton
– Jon Egerton, Commented May 2, 2014 at 11:57
What I mean is you should use String for both, and of course, use c1 inside the method, as @JonEgerton said. The replace method takes two strings or two chars, it doesn't allow mixing, so it implicitly convert one of them — Antonio
– Antonio, Commented May 2, 2014 at 11:57
@SysDragon option strict on doesn't allow a string.empty. JonEgerton oops, I will change it... code from debugging ;).. thanks — Bart Van Den Boomen
– Bart Van Den Boomen, Commented May 2, 2014 at 11:59

Bart Van Den Boomen · Accepted Answer · 2014-05-02 12:12:59Z

1

I'm not able to find a solution to replace a single CHAR by an empty CHAR, since an empty char doesn't seem to exist, like an empty string does. I changed the sub to take in strings instead of chars, this works fine...even when replacing only 1 character.

answered May 2, 2014 at 12:12

Bart Van Den Boomen

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1 Comment

Heinzi Over a year ago

Yes, that's the correct solution. A variable of type char always contains exactly one character.

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