Private   Sub   New ()
     End Sub

Private   Shared  gEncoding  As  System.Text.Encoding  =  System.Text.Encoding.GetEncoding( " GB2312 " )

Public   Shared   Property  Encoding()  As  System.Text.Encoding
         Get
             Return  gEncoding
         End   Get
         Set ( ByVal  value  As  System.Text.Encoding)
            gEncoding  =  value
         End   Set
     End Property

Public   Shared   Function  Length( ByVal  s  As   String )  As   Integer
         Return  gEncoding.GetByteCount(s)
     End Function

Public   Shared   Function  PadLeft( ByVal  s  As   String ,  ByVal  totalWidth  As   Integer ,  ByVal  paddingChar  As   Char )  As   String
         Return  s.PadLeft(GetValidNum(totalWidth  +  s.Length  -  Length(s)), paddingChar)
     End Function

Public   Shared   Function  PadLeft( ByVal  s  As   String ,  ByVal  totalWidth  As   Integer )  As   String

Return  s.PadLeft(GetValidNum(totalWidth  +  s.Length  -  Length(s)))
     End Function

Public   Shared   Function  PadRight( ByVal  s  As   String ,  ByVal  totalWidth  As   Integer ,  ByVal  paddingChar  As   Char )  As   String
         Return  s.PadRight(GetValidNum(totalWidth  +  s.Length  -  Length(s)), paddingChar)
     End Function

Public   Shared   Function  PadRight( ByVal  s  As   String ,  ByVal  totalWidth  As   Integer )  As   String
         Return  s.PadRight(GetValidNum(totalWidth  +  s.Length  -  Length(s)))
     End Function

Public   Shared   Function  SubString( ByVal  Line  As   String ,  ByVal  Index  As   Integer ,  ByVal   Len   As   Integer )  As   String
         Dim  num  As   Integer   =  Length(Line)
         Return  gEncoding.GetString(gEncoding.GetBytes(Line), Index,  Len )
     End Function

Private   Shared   Function  GetValidNum( ByVal  num  As   Integer )  As   Integer
         If  num  <   0   Then
             Return   0
         Else
             Return  num
         End   If
     End Function

Public   Shared   Function   Format ( ByVal  sformat  As   String ,  ByVal  arg0  As   Object )  As   String
         Return   Format (sformat,  New   Object () {arg0})
     End Function

Public   Shared   Function   Format ( ByVal  sformat  As   String ,  ByVal  arg0  As   Object ,  ByVal  arg1  As   Object )  As   String
         Return   Format (sformat,  New   Object () {arg0, arg1})
     End Function

Public   Shared   Function   Format ( ByVal  sformat  As   String ,  ByVal  arg0  As   Object ,  ByVal  arg1  As   Object ,  ByVal  arg2  As   Object )  As   String
         Return   Format (sformat,  New   Object () {arg0, arg1, arg2})
     End Function

Public   Shared   Function   Format ( ByVal  sformat  As   String ,  ByVal  args  As   Object ())  As   String
         Return  myFormat(sformat, args)
     End Function

Private   Shared   Function  myFormat( ByVal  sformat  As   String ,  ByVal  args  As   Object ())  As   String
         Dim  mysformat  As   String   =  sformat

' 以下匹配字符串,找的是复合格式{index[,alignment][:formatString]}有alignment的完整项{}
         Dim  mPattern  As   String   =   " {(/d+)([/s]*,[/s]*[-]?)(/d+)(.*?)} "
         Dim  mMatchs  As  System.Text.RegularExpressions.MatchCollection
        mMatchs  =  System.Text.RegularExpressions.Regex.Matches(mysformat, mPattern)

' 处理各匹配项,重置各项长度
         For   Each  m  As  System.Text.RegularExpressions.Match  In  mMatchs

Dim  s  As   String   =  m.Groups( 0 ).Value  ' 匹配完整项
             Dim  index  As   Integer   =  Convert.ToInt32(m.Groups( 1 ).Value)  ' 格式索引
             Dim   len   As   Integer   =  Convert.ToInt32(m.Groups( 3 ).Value)  ' 原固定长度

Dim  NowLen  As   Integer   =  AligLen( len , args(index))  ' 现固定长度
             ' 以下重置固定长度
             Dim   replace   As   String   =   " {${1}${2} "   &  NowLen.ToString  &   " ${4}} "
             Dim  Nows  As   String   =  m.Result( replace )
            mysformat  =  mysformat.Replace(s, Nows)
         Next

Return   String .Format(mysformat, args)
     End Function

'混合 字符文本固定长度的重置
     Private   Shared   Function  AligLen( ByVal   len   As   Integer ,  ByVal  arg  As   Object )  As   Integer
         Return   len   -  Length(arg.ToString)  +  arg.ToString.Length
     End Function
End Class