Get column index values in gridview - asp.net

Question

I am having a gridview in asp.net, and in the table I have two columns.
Now I must show the column index value row by row on the button click in form of a alert for dllDesc and txtBoxDesc fields.
<asp:GridView ID="gvCar" runat="server" CellPadding="4" ForeColor="#333333" GridLines="None" AutoGenerateColumns="False" DataKeyNames="LevelID" OnRowDataBound="gvCar_RowDataBound">
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:TemplateField HeaderText="Car">
<ItemTemplate>
<asp:Label ID="Car" runat="server" Width="150px" Height="30px" Font-Names="Georgia" MyCustomAttr="foo" margin-Left="100px" Text='<%# Bind("CharName") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Description">
<ItemTemplate>
<asp:DropDownList ID="ddlDesc" Width="142px" Height="35px" Font-Names="Georgia" margin-Left="100px" runat="server">
</asp:DropDownList>
<asp:TextBox ID="txtBoxDesc" runat="server" Width="130px" Height="28px" Font-Names="Georgia" margin-Left="100px" Text=''></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
I managed to get the value for rows(code below) but i could not find a way to show it for columns.
protected void Button1_Click(object sender, EventArgs e)
{
foreach (GridViewRow gvr in gvCar.Rows)
{
string PrimaryKey = gvCar.DataKeys[gvr.RowIndex].Values[0].ToString();
MessageBox.Show(PrimaryKey);
}
}
Can someone help me please?

Answer 1

just bind it like this on grid view don't need to do anything else
<asp:TemplateField HeaderText="No.">
<ItemTemplate>
<%# Container.DataItemIndex + 1 %>
</ItemTemplate>
</asp:TemplateField>
EDIT UPDATE 2
just add on selected index Changed event
<asp:GridView ID="gvCar" runat="server" OnSelectedIndexChanged="gvCar_SelectedIndexChanged">
and in your cs file
protected void gvCar_SelectedIndexChanged(object sender, EventArgs e)
{
try
{
string a = gvCar.SelectedRow.Cells[0].Text; //Write here that cell index of index no
}
catch (Exception ex)
{
}
}
if you want to do that by row command then open bellow link
Row command example
that will work for you

Answer 2

You just iterate over the columns and then you ask for the header text:`
for (int i = 0; i < gvCar.Columns.Count; i++)
{
string columnHeader = gvCar.Columns[i].HeaderText;
}
EDITED AFTER FEEDBACK:
For the datatables I think it works like this:
for (int i = 0; i < dt.Columns.Count; i++)
{
int colIndex = dt.Columns[i].Ordinal;
}
Hope this helps!