How to adress a GridView cell by column name?

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
 
/// <summary>
/// Access DetailsView's datafields by name.
/// </summary>
public class DetailsViewBoundFieldHelper
{
 
 
    public static int GetIndex(DetailsView dv, string fieldName)
    {
        for (int i = 0; i < dv.Fields.Count; i++)
        {
            DataControlField field = dv.Fields[i];
            BoundField bfield = field as BoundField;
 
            //Assuming accessing happens at data level, e.g with data field's name
            if (bfield != null && bfield.DataField == fieldName)
                return i;
        }
        return -1;
    }
 
    public static int GetIndexByAccessableHeaderText(DetailsView dv, string accessableHeaderText)
    {
        int rslt=-1;
        foreach(DataControlField field in dv.Fields)
            if(field.AccessibleHeaderText==accessableHeaderText)
                rslt=dv.Fields.IndexOf(field);
        return rslt;
    }
 
 
 
    public static object GetObj(DetailsView dv, string fieldName, int columnIndex)
    {
        int ind = GetIndex(dv, fieldName);
        return dv.Rows[ind].Cells[columnIndex];       
    }
    public static object GetObj(DetailsView dv, string fieldName)
    {
        return GetObj(dv, fieldName, 1);
    }
 
 
    public static string GetText(DetailsView dv, string fieldName,int columnIndex )
    {        
        int ind = GetIndex(dv, fieldName);
        string rslt;
        rslt = dv.Rows[ind].Cells[columnIndex].Text;
        return rslt;
    }
 
 
    public static string GetTextByAccessableHeaderText(DetailsView dv, string accessableHeaderText, int columnIndex)
    {
        int ind = GetIndexByAccessableHeaderText(dv, accessableHeaderText);
        string rslt = dv.Rows[ind].Cells[columnIndex].Text;
        return rslt;
    }
    public static string GetTextByAccessableHeaderText(DetailsView dv, string accessableHeaderText)
    {
        return GetTextByAccessableHeaderText(dv, accessableHeaderText, 1); //assuming col 1
    }
 
 
 
 
 
    public static string GetText(DetailsView dv, string fieldName)
    {
        return GetText(dv, fieldName, 1); //assuming value in column 1 (second)
    }
 
}

                                              

1:
2:
3:
4:
5:
6:
7:
8:
9:
10:
11:
12:
13:
14:
15:
16:
17:
18:
19:
20:
21:
22:
23:
24:
25:
26:
27:
28:
29:
30:
31:
32:
33:
34:
35:
36:
37:
38:
39:
40:
41:
42:
43:
44:
45:
46:
47:
48:
49:
50:
51:
52:
53:
54:
55:
56:
57:
58:
59:
60:
61:
62:
63:
64:
65:
66:
67:
68:
69:
70:
71:
72:
73:
74:
75:
76:
77:
78:
79:
80:
81:
82:
83: