Failed to create a 'System.Char' from the text '#' in WP7.1 - windows-phone-7

Question

I'm creating MaskedTextBox in WP7.1 In that i want to set the Prompt char as '#'.
For ex: ##-##-#### ##:##. While running this i got an error message as
Failed to create a 'System.Char' from the text '#'
Please anyone can help me....

Answer 1

Please, post more details regarding your exception.
Also, consider using standard PasswordBox with PasswordChar property:
<PasswordBox PasswordChar="#"/>
UPDATE:
Use this char converter on your PromptChar property:
public class CharTypeConverter : TypeConverter
{
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
{
if (sourceType == typeof(string))
return true;
return base.CanConvertFrom(context, sourceType);
}
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
{
if (destinationType == typeof(string))
return true;
return base.CanConvertTo(context, destinationType);
}
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if (value == null)
return '_';
if (value is string)
{
string s = (string)value;
if (s.Length == 0 || s.Length > 1)
return '_';
return s[0];
}
return base.ConvertFrom(context, culture, value);
}
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if (value != null && !(value is char))
throw new ArgumentException("Invalid prompt character", "value");
if (destinationType == typeof(string))
{
if (value == null)
return String.Empty;
char promptChar = (char)value;
return promptChar.ToString();
}
return base.ConvertTo(context, culture, value, destinationType);
}
}
Usage:
[TypeConverter(typeof(CharTypeConverter))]
public char PromptChar
{
get { ... }
set { ... }
}