---HTML code--- <pre><form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server" /> <table border="0" cellspacing="0" cellpadding="0" style="width: 725px"> <tr> <th align="center" colspan="5" valign="middle" class="text" > <asp:Label ID="lblErrorMsg" runat="server" CssClass="alertMsg" Width="500" ></asp:Label> </th> </tr> <tr> <th height="21" align="left" valign="middle" colspan="5"> Select Artefact Type</th> </tr> <tr> <th height="29" align="left" valign="top" scope="row"> <asp:DropDownList ID="ArtefactType" runat="server" Width="140px" onselectedindexchanged="ArtefactType_SelectedIndexChanged" CssClass="formlines" AutoPostBack="true"> <asp:ListItem Value=""> -- Select --</asp:ListItem> <asp:ListItem Text="1" Value="1" /> <asp:ListItem Text="2" Value="2" /> <asp:ListItem Text="3" Value="3" /> <asp:ListItem Text="4" Value="4 Konfig"/> <asp:ListItem Text="Miscellaneous" Value="Miscellaneous" /> </asp:DropDownList> </th> </tr> <%-- <asp:Panel runat="server" id="FilterPanel" Visible="true" >--%> <tr> <th width="145" height="21" align="left" valign="middle" class="text" scope="col"> Select Project</th> <th height="21" align="left" valign="middle" class="style1" scope="col"> Select S/W Release</th> </tr> <tr> <th width="145" height="21" align="left" valign="top" scope="col"> <asp:DropDownList ID="ProjectsCmb" runat="server" Width="140px" CssClass="formlines" Height="28px" onselectedindexchanged="ProjectsCmb_SelectedIndexChanged" AutoPostBack="True" > </asp:DropDownList> </th> <asp:UpdatePanel ID="UpdateFilterPanel" runat="server" UpdateMode="Conditional" > <ContentTemplate> <th width="145" height="21" align="left" valign="top" scope="col"> <asp:DropDownList ID="SoftwareReleaseCmb" runat="server" Width="140px" CssClass="formlines" onselectedindexchanged="SoftwareReleaseCmb_SelectedIndexChanged" AutoPostBack="True" > </asp:DropDownList> </th> </ContentTemplate> <Triggers> <asp:AsyncPostBackTrigger ControlID="ProjectsCmb" EventName="SelectedIndexChanged" /> </Triggers> </asp:UpdatePanel> </tr> <tr> <th valign="middle" align="center" colspan="5"> <asp:UpdateProgress ID="UpdateProgress1" runat="server" DisplayAfter="100" Visible="true" DynamicLayout="true"> <ProgressTemplate> </ProgressTemplate> </asp:UpdateProgress> </th> </tr> <tr> <th height="21" align="left" valign="middle" class="text" scope="col" colspan="2"> <asp:Button ID="SearchArtefactsBtn" runat="server" Text="Search Artefacts" CssClass="formlines" /></th> </tr> <%--</asp:Panel>--%> </table> <asp:UpdateProgress ID="udProgress" runat="server" DisplayAfter="100" Visible="true" DynamicLayout="true"> <ProgressTemplate> </ProgressTemplate> </asp:UpdateProgress> </form> --------------- -- --Backend code C#-------- protected void ArtefactType_SelectedIndexChanged(object sender, EventArgs e) { ProjectsCmb.Items.Add("1"); ProjectsCmb.Items.Add("22"); ProjectsCmb.Items.Add("333"); ProjectsCmb.Items.Add("4444"); } protected void ProjectsCmb_SelectedIndexChanged(object sender, EventArgs e) { SoftwareReleaseCmb.Items.Add("1"); SoftwareReleaseCmb.Items.Add("22"); SoftwareReleaseCmb.Items.Add("333"); SoftwareReleaseCmb.Items.Add("4444"); }
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