How to get textbox text from gridviews current row on click of linkbutton in that row

Here is my gridview 
<asp:GridView ID="gvEmployee" runat="server" AutoGenerateColumns="false" GridLines="Both"> <Columns> <asp:TemplateField HeaderText="Name"> <ItemTemplate> <asp:TextBox ID="txtName" runat="server" Text='<%#Eval("Name") %>'></asp:TextBox> </ItemTemplate> </asp:TemplateField> <asp:BoundField DataField="Emailid" HeaderText="EmailId" /> <asp:TemplateField > <ItemTemplate> <asp:LinkButton ID="lnkgettext" runat="server" OnClientClick="return callme(<%= txtName.ClientID %>);" Text="Gettextboxvalue" ></asp:LinkButton> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridVi ...