Getting row from hyperlink in Gridview - asp.net

Question

I have a Hyperlink field in a asp.net gridview that runs code behind in an aspx file, like
<asp:GridView ID="gvCoursesList" runat="server">
<Columns>
<asp:BoundField DataField="Course" HeaderText="Course">
</asp:BoundField>
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton ID="lblSignup" runat="server" Text="Sign Up" OnClick= "lblSignup_Click" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
In my code behind file I have the function:
protected void lblSignup_Click(object sender, EventArgs e)
{
}
How do I retrieve the value of the first column from this function.
I would like to do something like
string course = gvCoursesList.DataKeys[e.RowIndex].Value.ToString();
but it's not working. Any other ideas?

Answer 1

#jishnusaha should be the approach you should take. Here is another alternative: http://forums.asp.net/p/1137287/1821091.aspx
protected void lblSignup_Click(object sender, EventArgs e)
{
LinkButton btn = sender as LinkButton;
GridViewRow row = btn.NamingContainer as GridViewRow;
string course = gvCoursesList.DataKeys[row.RowIndex].Value.ToString();
}

Answer 2

<asp:GridView ID="gvCoursesList" runat="server" OnRowCommand="gvCoursesList_RowCommand">
<Columns>
<asp:BoundField DataField="Course" HeaderText="Course">
</asp:BoundField>
<asp:TemplateField>
<ItemTemplate>
<asp:LinkButton ID="lblSignup" runat="server" Text="Sign Up" CommandName="SignUp" />
</ItemTemplate>
</asp:TemplateField>
</Columns>
protected void gvCoursesList_RowCommand(object sender, GridViewRowCommandEventArgs e)
{
if(e.CommandName=="SignUp")
{
string course = gvCoursesList.DataKeys[e.RowIndex].Value.ToString();
}
}

Answer 3

Use the .cells.text to get the value out:
protected void lblSignup_Click(object sender, EventArgs e)
{
GridViewRow row = gvCoursesList.rows[e.rowindex]
string course = row.cells[cellIndex].text;
}

Answer 4

With thanks to codingbiz. His solution just needed a little tweak as per below.
LinkButton btn = sender as LinkButton;
GridViewRow row = btn.NamingContainer as GridViewRow;
string course = row.Cells[0].Text;