Can .NET convert “Yes” & “No” to boolean without If?

Question

You would think there would be a way using DirectCast, TryCast, CType etc but all of them seem to choke on it e.g.:

CType(\"Yes\", Boolean)

Answer 1

No, but you could do something like:

bool yes = "Yes".Equals(yourString);

Answer 2

public static bool IsBoolean(string strValue)
{
    return !string.IsNullOrEmpty(strValue) && ("1/YES/TRUE".IndexOf(strValue, StringComparison.CurrentCultureIgnoreCase) >= 0);
}

Answer 3

    private bool StrToBool(string value)
    {   // could be yes/no, Yes/No, true/false, True/False, 1/0
        bool b = false;
        if (value.Equals("yes", StringComparison.CurrentCultureIgnoreCase) || value.Equals(Boolean.TrueString, StringComparison.CurrentCultureIgnoreCase) || value.Equals("1"))
        {
            b = true;
        }
        else if (value.Equals("no", StringComparison.CurrentCultureIgnoreCase) || value.Equals(Boolean.FalseString, StringComparison.CurrentCultureIgnoreCase) || value.Equals("0"))
        {
            b = false;
        }
        else
        {   // we should't be here 
            b = false;
        }
        return b;
    }

Answer 4

Here is a simple way to get this done.

rv.Complete = If(reader("Complete") = "Yes", True, False)

Answer 5

You Can't. But you should use it as

bool result = yourstring.ToLower() == "yes";

Answer 6

Public Function TrueFalseToYesNo(thisValue As Boolean) As String
    Try
        If thisValue Then
            Return "Yes"
        Else
            Return "No"
        End If
    Catch ex As Exception
        Return thisValue.ToString
    End Try
End Function