How to find control inside ListView control in ASP.Net

Due to postback of Button you will not get  the TextBox value.

if you want to test it change Label to TextBox for lblLastName

Here is the Sample:

HTML:

<form id="form1" runat="server">
    <div>
        <asp:ListView ID="lvDemo" runat="server">
            <LayoutTemplate>
                <table border="0" cellpadding="1">
                    <tr style="background-color: #E5E5FE">
                        <th align="left">
                            EmployeeId
                        </th>
                        <th align="left">
                            LastName
                        </th>
                        <th align="left">
                            Country
                        </th>
                        <th align="left">
                        </th>
                    </tr>
                    <tr runat="server" id="itemPlaceholder" />
                </table>
            </LayoutTemplate>
            <ItemTemplate>
                <tr id="Tr1" runat="server">
                    <td id="Td1" runat="server">
                        <asp:Label ID="lblCustomerID" runat="server" Text='<%# Eval("EmployeeID") %>'></asp:Label>
                    </td>
                    <td id="Td2" runat="server">
                        <asp:Label ID="lblLastName" runat="server" Text='<%# Eval("LastName") %>'></asp:Label>
                    </td>
                    <td>
                        <asp:Label ID="lblCountry" runat="server" Text='<%# Eval("Country") %>'></asp:Label>
                    </td>
                    <td id="Td3" runat="server">
                        <asp:LinkButton ID="lnkSelect" runat="server" OnClick="GetName" Text="Select" />
                    </td>
                </tr>
            </ItemTemplate>
        </asp:ListView>
    </div>
    </form>

C#:

 protected void Page_Load(object sender, EventArgs e)
        {
            if (!this.IsPostBack)
            {
                this.GetEmployees();
            }
        }

        protected void GetName(object sender, EventArgs e)
        {
            LinkButton btn = sender as LinkButton;
            ListViewDataItem item = (ListViewDataItem)(sender as Control).NamingContainer;
            Label lblStatus = (Label)item.FindControl("lblLastName");

            string message = lblStatus.Text;
            System.Text.StringBuilder sb = new System.Text.StringBuilder();
            sb.Append("<script type = 'text/javascript'>");
            sb.Append("window.onload=function(){");
            sb.Append("alert('");
            sb.Append(message);
            sb.Append("')};");
            sb.Append("</script>");
            ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", sb.ToString());
        }

        private void GetEmployees()
        {
            string constr = ConfigurationManager.ConnectionStrings["conString"].ConnectionString;
            string sqlStatment = "SELECT EmployeeID ,LastName,Country FROM Employees ";
            using (SqlConnection con = new SqlConnection(constr))
            {
                using (SqlCommand cmd = new SqlCommand(sqlStatment, con))
                {
                    using (SqlDataAdapter da = new SqlDataAdapter(cmd))
                    {
                        DataSet ds = new DataSet();
                        da.Fill(ds);
                        this.lvDemo.DataSource = ds;
                        this.lvDemo.DataBind();


                    }
                }
            }
        }

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