Update Panel with drop down and Panel visible Issues in Asp .net

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Hi Frnds,
Below code i have two Panel.Inside drop down change event i need to change panel change.but page also getting refresh how to do without refresh.

HTML

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <div>
        <asp:Panel ID="Panel1" runat="server">
            <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
                    <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
                        <asp:ListItem>Select</asp:ListItem>
                        <asp:ListItem>Panel2</asp:ListItem>
                    </asp:DropDownList>
                </ContentTemplate>
                <Triggers>
                    <asp:AsyncPostBackTrigger ControlID="DropDownList1" />                    
                </Triggers>
            </asp:UpdatePanel>
            <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
            <asp:Button ID="btnP1" runat="server" Text="Panel1" OnClick="btnP1_Click" />
        </asp:Panel>
        <asp:Panel ID="Panel2" runat="server">
            <asp:UpdatePanel ID="UpdatePanel2" runat="server">
                <ContentTemplate>
                    <asp:DropDownList ID="DropDownList2" runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownList2_SelectedIndexChanged">
                        <asp:ListItem>Select</asp:ListItem>
                        <asp:ListItem>Panel1</asp:ListItem>
                    </asp:DropDownList>
                </ContentTemplate>
                <Triggers>
                    <asp:AsyncPostBackTrigger ControlID="DropDownList2" />                    
                </Triggers>
            </asp:UpdatePanel>
            <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
            <asp:Button ID="btnP2" runat="server" Text="Panel2" OnClick="btnP2_Click" />
        </asp:Panel>
    </div>
    </form>
</body>
</html>

C#

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (DropDownList1.SelectedValue.ToString() == "Panel2")
        {
            Panel2.Visible = true;
            Panel1.Visible = false;
        }
    }
    protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (DropDownList2.SelectedValue.ToString() == "Panel1")
        {
            Panel2.Visible = false;
            Panel1.Visible = true;
        }
    }
    protected void btnP1_Click(object sender, EventArgs e)
    {
        Panel1.Visible = false;
        Panel2.Visible = true;
    }
    protected void btnP2_Click(object sender, EventArgs e)
    {
        Panel1.Visible = true;
        Panel2.Visible = false;
    }

Posted 19-Dec-12 1:50am

itsureshuk

Updated 19-Dec-12 1:52am

v2

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chester_it21 · Answer 1 · 2012-12-19T02:02:00

Solution 1

hi itsureshuk,

give this :

C#

EventName="SelectedIndexChanged"

in event :

C#

AsyncPostBackTrigger

so, to be this :

C#

<asp:asyncpostbacktrigger controlid="DropDownList1" eventname="SelectedIndexChanged" />

and one again in asp:AsyncPostBackTrigger for DropDownList2

C#

<asp:asyncpostbacktrigger controlid="DropDownList2" eventname="SelectedIndexChanged" />

I hope this helps,

Posted 19-Dec-12 2:02am

chester_it21

Updated 19-Dec-12 2:04am

v2

Comments

itsureshuk 19-Dec-12 8:48am

Hi chester_it21 frnd, Thnk u for ur rply.I got output.