How to custom format data in datagridview during databinding

Question

I\'m looking for a way to format DataGridViewTextBoxColumn so that the value to be databinded is formatted during databinding. For example I have a CompanyName property and

Answer 1

This is a code snippet I use for an example of implementing IFormattable and ICustomFormatter.

Implements IFormattable
Implements ICustomFormatter

Public Function Format(ByVal formatExpression As String, ByVal arg As Object, ByVal formatProvider As System.IFormatProvider) As String Implements System.ICustomFormatter.Format
    'type is currently ignored
    '   if type is international then "USPS" should result in international address
    '   if type is international then "US" should result in international address
    '   and so on
    '

    '.NET Framework Class Library
    'IFormattable Interface
    'Remarks - A class that implements IFormattable must support the "G" (general) formatting code. Besides the "G" code, the class can define the list of formatting codes that it supports.

    'is G and g the same?
    '   yes for numeric
    '   no for date/time

    'Standard Numeric Format Strings
    '   G or g - both are the same
    'Standard DateTime Format Strings
    '   g - General date/time pattern (short time)
    '   G - General date/time pattern (long time)


    If Len(formatExpression) = 0 Then
        Return String.Format("{0}", arg)
    End If

    'usps - standardized
    'us - address less country
    'international - all address lines

    If formatExpression.Equals("g") Then
        'general formatting code
        '   as per documentation
        Return GatherAddress(_line1, _line2, _city, _state, _zip, _country, _type, AddressFormat.StandardUS)

    ElseIf formatExpression.Equals("G") Then
        'general formatting code
        '   as per documentation
        Return GatherAddress(_line1, _line2, _city, _state, _zip, _country, _type, AddressFormat.Standardized)

    ElseIf formatExpression.ToUpper.Equals("USPS") Then
        Return GatherAddress(_line1, _line2, _city, _state, _zip, _country, _type, AddressFormat.Standardized)

    ElseIf formatExpression.ToUpper.Equals("US") Then
        Return GatherAddress(_line1, _line2, _city, _state, _zip, _country, _type, AddressFormat.StandardUS)

    ElseIf formatExpression.ToUpper.Equals("INTERNATIONAL") Then
        Return GatherAddress(_line1, _line2, _city, _state, _zip, _country, _type, AddressFormat.International)

    Else
        Return MyBase.ToString()

    End If

End Function

Public Overloads Function ToString(ByVal format As String, ByVal formatProvider As System.IFormatProvider) As String Implements System.IFormattable.ToString
    Return Me.Format(format, Nothing, formatProvider)
End Function