Facing Issue On Event Change Using Ajax

Question

Hi every body hope doing well

 i have created a form on which drop some controls and binded these controls at run time on page load event and these controls puted in update panel (Ajax)  on first dropdownlist chage event i have register javascript to show alert but unfortunetly it is not showing ,if i removing the update panel then it is working can any body help me please.

 

 

 

 

<form id="form1" runat="server">

<div>

<asp:ScriptManager runat="server"></asp:ScriptManager>

<asp:UpdatePanel runat="server">

<ContentTemplate>

Accounts<br />

<asp:DropDownList ID="ddlaccountnumber" AutoPostBack="true" OnSelectedIndexChanged="ddlaccountnumber_SelectedIndexChanged" runat="server"></asp:DropDownList><br />

Currency<br />

<asp:DropDownList ID="ddlcurrency" AutoPostBack="true" OnSelectedIndexChanged="ddlcurrency_SelectedIndexChanged" runat="server"></asp:DropDownList><br />

Amount <br />

<asp:TextBox runat="server" ID="txtAmount"></asp:TextBox>

</ContentTemplate>

</asp:UpdatePanel>

</div>

</form>

 

 

 

Code Behind

 

 

public partial class ABC : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

if (!Page.IsPostBack)

{

BindDDlAccount();

BindCurrecy();

}

}

protected void BindDDlAccount()

{

try {

List<ListItem> items = new List<ListItem>()

{

new ListItem{ Text="12346790", Value="423423432"},

new ListItem{ Text="123455", Value="34356565"},

new ListItem{ Text="0908977867", Value="342224443"},

new ListItem{ Text="3425466768767", Value="6756455498797"},

new ListItem{ Text="435345657867", Value="3453456787987"},

new ListItem{ Text="345657787", Value="455467896"},

new ListItem{ Text="34564567678", Value="454678798797"},

};

ddlaccountnumber.DataSource = items;

ddlaccountnumber.DataBind();

}

catch (Exception ex_) { }

}

protected void BindCurrecy()

{

try {

List<ListItem> imtes = new List<ListItem>()

{

new ListItem {Value="PKR", Text="PKR"},

new ListItem {Value="USD", Text="USD"},

new ListItem {Value="INR", Text="INR"},

new ListItem {Value="OMR", Text="OMR"}

};

ddlcurrency.DataSource = imtes;

ddlcurrency.DataBind();

}

catch (Exception ex) { }

}

protected void ddlaccountnumber_SelectedIndexChanged(object sender, EventArgs e)

{

string script = "<script>alert('cliked');</script>";

Page.ClientScript.RegisterStartupScript(this.GetType(), "NAMe", script);

}

protected void ddlcurrency_SelectedIndexChanged(object sender, EventArgs e)

{

}

}