Modal Pop Up in ASP.Net

Question

In Link Button Click To Open Modal Correctly

 

But click close button not close...what is the reason i dont know..the close button not triggered....

 

My Code...

<asp:LinkButton ID="lnkbtnSalesLead" runat="server" Text="10" Font-Size="16px" OnClick="lnkbtnSalesLead_Click"></asp:LinkButton><br />
<div class="container" id="divModal" runat="server">
<!-- Modal -->
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Sales Lead Details</h4>
</div>
<div class="modal-body">
<asp:GridView ID="gvLead" runat="server" AutoGenerateColumns="False" CssClass="table table-bordered table-condensed">
<Columns>
<asp:TemplateField HeaderText="Emp Name">
<ItemTemplate>
<asp:Label ID="lblEmpName" runat="server" Text='<%# Bind("EmpName") %>'></asp:Label>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Client Code">
<ItemTemplate>
<asp:Label ID="lblCustomerName" runat="server" Text='<%# Bind("CustomerName") %>'></asp:Label>
</ItemTemplate>
<ItemStyle Horizontal />
</asp:TemplateField>
<asp:TemplateField HeaderText="Sales Lead Stage">
<ItemTemplate>
<asp:Label ID="lblSalesLeadStage" runat="server" Text='<%# Bind("SalesLeadStage") %>'></asp:Label>
</ItemTemplate>
<ItemStyle HorizontalAlign="Center" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Meeting Date">
<ItemTemplate>
<asp:Label ID="lblMeetingDate" runat="server" Text='<%# Bind("MeetingDate") %>'></asp:Label>
</ItemTemplate>
<ItemStyle Horizontal />
</asp:TemplateField>
</Columns>
<PagerStyle HorizontalAlign="Center" CssClass="GridPager" />
<HeaderStyle CssClass="grdHead" />
<RowStyle BackColor="White" />
<FooterStyle BackColor="White" ForeColor="#000066" />
</asp:GridView>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
</div>
<script type='text/javascript'>
function openModal() {
$('[id*=myModal]').modal('show');
}
</script>

protected void lnkbtnSalesLead_Click(object sender, EventArgs e)
{
string sQuery = string.Empty;
string sError = string.Empty;
DataTable dtbl = new DataTable();
ImageButton Imgbtn = sender as ImageButton;
GridViewRow gvrow = lnkbtnSalesLead.NamingContainer as GridViewRow;
//hfUniqueId.Value = gvLead.DataKeys[gvrow.RowIndex].Value.ToString();
//Label sUserId = (Label)gvrow.FindControl("lblLeadId");
try
{
divModal.Visible = true;
sQuery = " My Database query";
objHelper.CreateConnection("Connect");
if (objHelper.FillDataTableByQueryString(ref dtbl, ref sError, sQuery) == true)
{
if (dtbl.Rows.Count > 0)
{
gvLead.DataSource = dtbl;
gvLead.DataBind();
ClientScript.RegisterStartupScript(this.GetType(), "Pop", "openModal();", true);
}
}
else
{
Page.Controls.Add(new LiteralControl("<script>alert('" + sError + "');</script>"));
return;
}
}
catch (Exception ex)
{
Page.Controls.Add(new LiteralControl("<script>alert('" + ex.Message.Replace("'", "").Replace("\n", "").Replace("\r", "") + "');</script>"));
return;
}
}