Hi
On Add Modal popup opens. In Modal Popup Student dropdown comes after selection of Mentor. It AutoPostBack as a result it goes back to previous page. It should remain on Modal Popup
<button type="button" class="btn bg-info btn-sm" data-toggle="modal" data-backdrop="static" data-keyboard="false" data-target="#modal_form_horizontal" onclick="Save();"><i class="icon-plus22 mr-1"></i>Add</button>
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<div class="form-horizontal">
<div class="modal-body">
<div class="row">
<div class="col-lg-6">
<div class="form-group">
<asp:DropDownList ID="ddlMentor" class="form-control" required="true" parsley-trigger="change" AutoPostBack="true" OnSelectedIndexChanged="ddlMentor_SelectedIndexChanged" runat="server">
<asp:ListItem Value="">Select Mentor</asp:ListItem>
</asp:DropDownList>
</div>
</div>
<div class="col-lg-6">
<div class="form-group">
<asp:DropDownList ID="ddlStudent" class="form-control" required="true" parsley-trigger="change" runat="server">
<asp:ListItem Value="">Select Student</asp:ListItem>
</asp:DropDownList>
</div>
</div>
</div>
</div>
</div>
Thanks