I have some html controls that use runat="server" on the server side. The problem is that with the "Select" element when selecting an element I must execute code on the server to load data into other "Select" but I do not accept the AutopostBack="true" or OnSelectedIndexChanged
<select id="mySelect" name="mySelect" runat="server" AutoPostBack="true" OnSeletedIndexChanged="mySelect_SelectIndexChanged"></select>
Instead of using 'OnSele c tedIndexChanged' (you have a typo there) you can try using the 'onchange' client event:
<select id="mySelect" ... onchange="selectChanged()">
and in your JavaScript:
function selectChanged() {
var myValue= document.getElementById("mySelect").value;
__doPostBack('mySelect', myValue);
}
After this, the postback of the page will be called, which you can use to collect the information sent (myValue) in the code behind using the Request.Params property.
Use asp: DropDownList which, like the Select, serves to select a single item from a list.
<asp:DropDownList id="AutosList" AutoPostBack="True" OnSelectedIndexChanged="AutosList_SelectIndexChanged"
runat="server">
<asp:ListItem Value="1">Ford</asp:ListItem>
<asp:ListItem Value="2">Toyota</asp:ListItem>
<asp:ListItem Value="3">Ferrari</asp:ListItem>
</asp:DropDownList>