It can be possible for using OnRowDataBound Event.
Refer below Sample for your reference.
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<style type="text/css">
body
{
font-family: Arial;
font-size: 10pt;
}
table
{
border: 1px solid #ccc;
}
table th
{
background-color: #F7F7F7;
color: #333;
font-weight: bold;
}
table th, table td
{
padding: 5px;
border-color: #ccc;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<u>Using RowDataBound</u><br />
<br />
<asp:GridView ID="GridView2" runat="server" AutoGenerateColumns="false" OnRowDataBound="OnRowDataBound">
<Columns>
<asp:TemplateField HeaderText="Row Number" ItemStyle-Width="100">
<ItemTemplate>
<asp:Label ID="lblRowNumber" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Descending Row Number" ItemStyle-Width="150">
<ItemTemplate>
<asp:Label ID="lblRowNumnerDesending" runat="server" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Name" HeaderText="Name" ItemStyle-Width="150" />
<asp:BoundField DataField="Country" HeaderText="Country" ItemStyle-Width="150" />
</Columns>
</asp:GridView>
</form>
</body>
</html>
C#
public int DtCount { get; set; }
protected void Page_Load(object sender, EventArgs e)
{
if (!this.IsPostBack)
{
this.BindGrid();
}
}
private void BindGrid()
{
string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
using (SqlConnection con = new SqlConnection(constr))
{
using (SqlCommand cmd = new SqlCommand("SELECT Name, Country FROM Customers"))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
sda.SelectCommand = cmd;
using (DataTable dt = new DataTable())
{
sda.Fill(dt);
// Set Count Property.
DtCount = dt.Rows.Count;
GridView2.DataSource = dt;
GridView2.DataBind();
}
}
}
}
}
protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
(e.Row.FindControl("lblRowNumber") as Label).Text = (e.Row.RowIndex + 1).ToString();
// Assign Decrement value by DtCount and RowIndex of current e.row
(e.Row.FindControl("lblRowNumnerDesending") as Label).Text = (DtCount - e.Row.RowIndex).ToString();
}
}
VB.Net
Public Property DtCount As Integer
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
If Not Me.IsPostBack Then
Me.BindGrid()
End If
End Sub
Private Sub BindGrid()
Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
Using con As SqlConnection = New SqlConnection(constr)
Using cmd As SqlCommand = New SqlCommand("SELECT Name, Country FROM Customers")
Using sda As SqlDataAdapter = New SqlDataAdapter()
cmd.Connection = con
sda.SelectCommand = cmd
Using dt As DataTable = New DataTable()
sda.Fill(dt)
DtCount = dt.Rows.Count
GridView2.DataSource = dt
GridView2.DataBind()
End Using
End Using
End Using
End Using
End Sub
Protected Sub OnRowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
If e.Row.RowType = DataControlRowType.DataRow Then
(TryCast(e.Row.FindControl("lblRowNumber"), Label)).Text =(e.Row.RowIndex + 1).ToString()
(TryCast(e.Row.FindControl("lblRowNumnerDesending"), Label)).Text =(DtCount - e.Row.RowIndex).ToString()
End If
End Sub
Screenshot
