Can someone provide me with sample javascript code that can be used to determine if an item has been selected in a dropdown list and then make it visible?
Can someone provide me with sample javascript code that can be used to determine if an item has been selected in a dropdown list and then make it visible?
Here is a jQuery solution I would recommend:
$(function () {
$("#<%= AspControlName.ClientID %>").change(function () {
if ($(this).val() == "TheValueYouWant") {
$("#WhatToShowID").show();
} else {
$("#WhatToHideID").hide();
}
});
});
To implement this functionality using C# in the code, you can follow these steps:
Here is an example of the HTML:
<asp:DropDownList ID="DropDownList1" autopostback="true" runat="server">
</asp:DropDownList>
C# Code:
protected void DropDownList1_SelectedIndexChanged(object sender, System.EventArgs e)
{
//Ensure that all extra stuff is hidden
item_1_extra_stuff.Visible = false;
item_2_extra_stuff.Visible = false;
switch (DropDownList1.Text) {
case "Item 1":
item_1_extra_stuff.Visible = true;
break;
case "Item 2":
item_2_extra_stuff.Visible = true;
break;
}
}
The autopostback feature allows the dropdown list to trigger the event, and then the switch statement determines which option was selected and shows or hides the required elements accordingly.
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