Populating dropdown list in code behind

I have this code in page.ascx-


            Pending
        Yes
        No


I want to check that if user has done some changes in the dropdown list say(changing from "pending" to "yes" or from "yes" to "no" anykind of change) then a dialog box should pop up to ask "do u want to notify the changes to the user"
How should i achieve this when populating in the code-behind ?

Swati ,

here is your Solution !!!

if my answer helps you then check "Do you like this answer " check box :)

Take one Hidden Field on Form that Will Act as Intermediate between Jscript and CodeBehind

Since java script Can Run on Client Side Code

you need to Code Client Side script .

Code Behind
----------------

 protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        RegisterClientScriptBlock("", "ConfirmIt()");
        /*Now Access the Hidden Filed Value Since it Contain the value that 
        User Clicked OK or Cancel */
        int result = int.Parse(HiddenField1.Value.ToString());
        if (result == 1)
        {
          // Do somthing 
        }
    }

HTML Code
-------------

function ConfirmIt()

{

var result = confirm("do u want to notify the changes to the user?");

if (result == true)

{

//Set the Hidden Field Value

document.getElementById("HiddenField1").value = "1";

}

else

{

document.getElementById("HiddenField1").value = "0";

}

script>

head>

<body>

<asp:HiddenField ID="HiddenField1" runat="server" Value="" />

<asp:DropDownList ID="DropDownList1" runat="server" onselectedindexchanged="DropDownList1_SelectedIndexChanged" AutoPostBack="True">

<asp:ListItem>Item1asp:ListItem>

<asp:ListItem>Item2asp:ListItem>

<asp:ListItem>Item3asp:ListItem>

asp:DropDownList>

div>

form>

body>

html>

4 Replies

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Kirtan Patel16y ago

Swati ,

here is your Solution !!!

if my answer helps you then check "Do you like this answer " check box :)

Take one Hidden Field on Form that Will Act as Intermediate between Jscript and CodeBehind

Since java script Can Run on Client Side Code

you need to Code Client Side script .

Code Behind
----------------

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)

    {

        RegisterClientScriptBlock("", "ConfirmIt()");

        /*Now Access the Hidden Filed Value Since it Contain the value that

        User Clicked OK or Cancel */

        int result = int.Parse(HiddenField1.Value.ToString());

        if (result == 1)

        {

        // Do somthing

        }

    }

HTML Code
-------------

<head runat="server">

    <script language="javascript">

        function ConfirmIt()

        {

             var result = confirm("do u want to notify the changes to the user?");

             if (result == true)

            {

                //Set the Hidden Field Value

                document.getElementById("HiddenField1").value = "1";

            }

            else

            {

                document.getElementById("HiddenField1").value = "0";

            }

        }

    script>

head>

<body>

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

    <div class="style1">

    <asp:HiddenField ID="HiddenField1" runat="server" Value="" />

        <asp:DropDownList ID="DropDownList1" runat="server" onselectedindexchanged="DropDownList1_SelectedIndexChanged" AutoPostBack="True">

            <asp:ListItem>Item1asp:ListItem>

            <asp:ListItem>Item2asp:ListItem>

            <asp:ListItem>Item3asp:ListItem>

        asp:DropDownList>

     div>

    form>

body>

html>
0
Hiren Soni16y ago
you might be a right,kirtan :)
sorry, if i made a mistake...
lets solve swati s problem .
0
Kirtan Patel16y ago
Hi Hiren !!

the code Given by you will show Confirm Message box only on Server / Visual Studio it cant show Confirm Dialog on Client Side

when you actually Host WebSite on IIS it will not shown to end user as its Server Side MessageBox .So it can be loaded at Client Side .
0
Hiren Soni16y ago
code 4 u.
dont 4get to accept answer
0