计算EXCEL列名代号的程序

//计算结果格式:
        //A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z,
        //AA,AB,AC,AD,AE,AF,AG,AH,AI,AJ,AK,AL,AM,AN,AO,AP,AQ,AR,AS,AT,AU,AV,AW,AX,AY,AZ,
        //BA,BB,BC,BD,BE,BF,BG,BH,BI,BJ,BK,BL
        private void buttonXP1_Click(object sender, System.EventArgs e)
        {
            string s="A";
            for(int i=0;i<2700;i++)
            {
                this.richTextBox1.Text +=s+",";
                s=InreasingData(s);
                 
            }
          MessageBox.Show(s)  ;

        }
        private string InreasingData(string strTemp)
        {
            int i=strTemp.Length ;
            char[] ca=new char[i];
            ca=strTemp.ToCharArray();  
            bool bCarryFlag=true;
            int w=i-1;
        
            int AddResult=(int)ca[w];
            AddResult+=1;

        
            while((bCarryFlag)&&(w>=0))
            {
                
                if(AddResult>90)
                {
                    ca[w]='A';    
                    
                    
                    if(w>0)
                    AddResult=(char)((int)ca[w-1]+1);

                
                
                    bCarryFlag=true;
                }
                else
                {
                    ca[w]=(char)((int)ca[w] +1);
                    bCarryFlag=false;
                }
                w--;
                    
            }
            strTemp="";
            for(int j=0;j<i;j++)
            {
                strTemp+=ca[j].ToString(); 
            }
            if((w<0)&&(bCarryFlag))
            {
                strTemp="A"+strTemp;
            }
            
            return strTemp;
        }

Private Sub ButtonXP1_Click()Sub ButtonXP1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ButtonXP1.Click
        Dim i As Int16 = 0
        Dim s As String = "A"
        Me.RichTextBox1.Text &= s & "',"
        For i = 0 To 1000
            s = IncreasingData(s)
            Me.RichTextBox1.Text &= s & "',"
        Next


    End Sub

    Private Function IncreasingData()Function IncreasingData(ByVal strTemp As String) As String
        Dim i As Integer = strTemp.Length
        Dim ca(i) As Char
        ca = strTemp.ToCharArray()
        Dim bCarryFlag As Boolean = True
        Dim w As Integer = (i - 1)
        Dim AddResult As Integer = Microsoft.VisualBasic.AscW(ca(w))
        AddResult += 1
        While ((bCarryFlag) And (w >= 0))
            If (AddResult > 90) Then
                ca(w) = "A"
                If (w > 0) Then
                    AddResult = Microsoft.VisualBasic.AscW(ca(w - 1)) + 1
                    bCarryFlag = True
                End If
            Else
                ca(w) = Microsoft.VisualBasic.ChrW(Microsoft.VisualBasic.AscW(ca(w)) + 1)
                bCarryFlag = False
            End If
            w = w - 1
        End While
        strTemp = ""
        Dim j As Integer = 0
        For j = 0 To i - 1
            strTemp &= ca(j).ToString()
        Next
        If ((w < 0) And (bCarryFlag)) Then
            strTemp = "A" & strTemp
        End If
        Return strTemp
    End Function