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Page scrolling on selecting value from drop down menu

i have successfully completed my web application for an organization and it works up to expectations but i noticed one problem and tried to cure it via searching on Google and asking seniors but none of these helped much.
Problem:
I have multiple drop downs lists on page, in which selecting value in one drop down triggers the loading of another drop down i.e. Country > cities situation, problem is that whenever i click any value it scrolls page to the top and i have to scroll back again then again and again which realy looks bad and unprofessional. Please help me.
Code:
<asp:UpdatePanel ID="updGridViewSMS" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<br />
<asp:Panel ID="pnlBoxesDropDowns" runat="server">
<label style="width:400px">Relevant Region</label>
<asp:DropDownList ID="ddlRegions" runat="server" CssClass="DropDown_Width" Width="147px" OnSelectedIndexChanged="ddlRegions_SelectedIndexChanged" AppendDataBoundItems="True" AutoPostBack="true" >
<asp:ListItem Value="-1" Selected="True">-Select-</asp:ListItem>
</asp:DropDownList>
<asp:RequiredFieldValidator ID="ReqFieldValidatorRegions" runat="server"
ControlToValidate="ddlRegions" ErrorMessage="Region is Required" InitialValue="-1"
ForeColor="Red" ValidationGroup="Complaints">Region is Required</asp:RequiredFieldValidator>
<label style="width:400px">Relevant District</label>
<asp:DropDownList ID="ddlDistricts" runat="server" CssClass="DropDown_Width" Width="147px" OnSelectedIndexChanged="ddlDistricts_SelectedIndexChanged" AutoPostBack="true">
</asp:DropDownList>
<asp:RequiredFieldValidator ID="ReqFieldValidatorDistricts" runat="server"
ControlToValidate="ddlDistricts" ErrorMessage="Region is Required" InitialValue="-1"
ForeColor="Red" ValidationGroup="Complaints">District is Required</asp:RequiredFieldValidator>
<label>Relevant P.Station</label>
<asp:DropDownList ID="ddlPoliceStations" runat="server" Width="147px" CssClass="DropDown_Width">
</asp:DropDownList>
<asp:RequiredFieldValidator ID="ReqFieldValidatorPoliceStations" runat="server"
ControlToValidate="ddlPoliceStations" ErrorMessage="Police Station is Required" InitialValue="-1"
ForeColor="Red" ValidationGroup="Complaints">Police Station is Required</asp:RequiredFieldValidator>
<label>Priority</label>
<asp:DropDownList ID="ddlPriority" runat="server">
<asp:ListItem Text="Top" Value="1"></asp:ListItem>
<asp:ListItem Text="Normal" Value="2"></asp:ListItem>
</asp:DropDownList>
</asp:Panel>
<br />
<br />
<asp:Timer runat="server" Interval="60000" ID="RefreshSmsComplaints" OnTick="RefreshSmsComplaints_Tick" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="RefreshSmsComplaints" EventName="Tick" />
</Triggers>
</asp:UpdatePanel>
help please.

The core issue here is that you are posting back to the server on every dropdown select. This means that the web page reloads, because it is your webserver that updates the HTML versus the more modern way to do things which is to have javascript do it on the client. Here is a hacky, imperfect, but quick solution:
In the browser, inspect your html DOM. Each of your dropdown ASPX tags should have been replaced with something along the lines of
<select id="ctl000$ddlDistricts"...
You can use url hashtags to scroll to that area by appending #ctl000$ddlDistricts to the url. Since the server knows which control was posted, it can get the control's client-side ID, and write it into the following javascript (preferably at the bottom of the page).
<script type="text/javascript">
location.href='#' + <%=PostedControl.ClientID %>
</script>
Why is this imperfect? Because it will scroll your page to a point where the dropdown is at the top edge of the browser. This means that if a user selects the dropdown with it halfway down the page, once the page reloads, that will be at the top. At the very least, however, your dropdowns will then be within view.
Your original question indicated that you wanted the page to look "professional" and while this gets the job done, it is imperfect, as will all solutions be when you are dealing with classic ASPX webforms-style postbacks. Specifically, your dropdowns have something that looks like this:
OnSelectedIndexChanged=MyFunction
What this tells the ASPX form is, in essence, "when you render this dropdown control into HTML, add something into the tag like onChange="postMyFormBackToServerCausingReloadAndPageScroll. What you really want, perhaps, is to have it do onChange=GetNewDropdownFromServerAndReplaceOnPageWithoutReload. That involves more knowledge than I can add to an already long answer, but here are some helpful links:
http://www.codeproject.com/Articles/691298/Creating-AJAX-enabled-web-forms (a bit old but probably a good stepping stone)
http://www.codedigest.com/Articles/jQuery/318_Doing_AJAX_with_jQuery_in_ASPNet.aspx (a slightly more modern way to do it, but you do more yourself with this method as opposed to relying on .NET)
Lastly, the fully modern way to do things that involves completely rewriting your page
http://www.codeproject.com/Articles/575397/An-Absolute-Beginners-Tutorial-on-ASP-NET-MVC-for (not sure if this is the right article for you, just google for ".NET MVC")

ASP Drop Down collapses after first click

I have an ASP Drop Down List that opens then immediately collapses on one click. I'm using a Drop Down on another page with the same CssClass, and it's working fine (first click expands the DDL and the second click collapses it). Anyone have any idea what could be happening? I would greatly appreciate any suggestions or input.
<label>
<asp:RadioButton ID="rbToAccount" runat="server" GroupName="rbTo" />
Account
<asp:DropDownList ID="ddlToAccount" runat="server" CssClass="span4 m-wrap">
</asp:DropDownList>
</label>

Try This :
<label></label>
<asp:RadioButton ID="rbToAccount" runat="server" GroupName="rbTo" />
Account
<asp:DropDownList ID="ddlToAccount" runat="server" CssClass="span4 m-wrap">
</asp:DropDownList>

is the event tied to a Jquery function??
It sounds like on dropdown list change it is causing a postback, which then is refreshing the page to it's original state. Try adding OnClientClick="return false" as an attribute to the ddl control

ASP.NET C#, dynamic drop down in repeater causing full post back

I have a page that contains a Repeater, which contains server control elements, within an UpdatePanel and while all other controls behave normally, the Drop Down control causes a full postback every time.
<asp:Repeater ID="rpt" runat="server">
<ItemTemplate>
<asp:SomeWorkingControl ID="swc" runat="server" />
<asp:DropDownList ID="ddl" runat="server" OnSelectedIndexChanged="ddl_SelectedIndexChanged" AutoPostBack="true">
<asp:ListItem Text="0" Value="0" />
<asp:ListItem Text="1" Value="1" />
</asp:DropDownList>
</ItemTemplate>
</asp:Repeater>
This is vaugely what my code looks like, the DropDownList control is actually in a UserControl, but the theory is the same.
If I apply an event to SomeWorkingControl then there is an Ajax postback and all is fine.
However, the event associated with the DropDownList causes a full postback! I know usually you would set an Async trigger for the DropDown, but since it is created in a repeater (and therefore I can not know how many there will be) so I don't really see how that could work.
Is there anybody who has experienced this before and knows a workaround perhaps?

Try to change this line:
<asp:DropDownList ID="ddl" runat="server" OnSelectedIndexChanged="ddl_SelectedIndexChanged" AutoPostBack="true">
for:
<asp:DropDownList ID="ddl" runat="server" OnSelectedIndexChanged="ddl_SelectedIndexChanged" AutoPostBack="true" ClientIDMode="AutoID">
Recently I had the same problem and I found out that the ClientIDMode can solve it.
Please have a look here: asp.net ClientIDMode Changes

AJAX UpdatePanel help needed

I have the following ASPX code:
<asp:ScriptManager ID="ScriptManager1" runat="server" />
<asp:UpdatePanel runat="server" ID="UpdatePanel" UpdateMode="Conditional">
<ContentTemplate>
<asp:Button runat="server" ID="UpdateButton1" OnClick="NextImg_Click" Text="Update" />
<asp:Repeater runat="server" ID="urlsUpdateRepeater">
<ItemTemplate>
<!-- THIS WOULD BE A LOOP FROM HERE -->
<!-- OPENS RESULT ITEM DIV CONTAINER -->
<div id="result_item">
<a href="<%# Eval("myUrl") %>" target="_blank">
<%# Eval("urlPageTitle")%></a>
</ItemTemplate>
</asp:Repeater>
</ContentTemplate>
</asp:UpdatePanel>
I have a NextImg_Click() event which works fine.
I use this code for DataBind... what is the Update method?
urlsUpdateRepeater.DataSource = resultsCollection;
urlsUpdateRepeater.DataBind();
Everything would appear to be in order. But every time the Update button is clicked it re-renders the whole page instead of the partial-postback UpdatePanel only.
It is driving me completely mad as I can't see anything wrong with the code. Is there some simple thing I'm missing?! Please help!
The search and data is displayed correctly (inside the panel) it just will not do a partial postback.
Appreciate your help with my noob problems!

Because the button is inside your UpdatePanel's ContentTemplate, it is unnecessary to take any extra action to get a partial page postback.
Try removing the line from your Page_Load() method.

Taken from MSDN:
Use the RegisterAsyncPostBackControl
method to register controls outside an
UpdatePanel control as triggers for
asynchronous postbacks, and to
potentially update the content of an
update panel. To update an UpdatePanel
control programmatically, call the
Update method.
So, you're control (UpdateButton1) is inside the UpdatePanel, no need for the ScriptManager1.RegisterAsyncPostBackControl call - ditch it and your problem is solved.

The problem was that my <form> tag was nested further into the document than it's corresponding end tag (with Warning!)...
Upon moving my form tag - it worked!
Entirely my fault, thanks guys.

asp.net Wizard control strange issue

Update:
There was actually a hidden panel with validator in the user control that was causing page not to be valid on the first postback. Consider this issue resolved.
This is first time I am using this control and it is behaving rather strange. I have to click on the "Next" button twice for it to move to the next step. I tried explicitly setting active index, using MoveTo etc. Nothing works. Here is the markup for the control. Anybody has any ideas why?
<asp:Wizard ID="UserWizard" runat="server" ActiveStepIndex="0"
StartNextButtonImageUrl = "~/App_Themes/Default/images/buttons/continue.gif" StartNextButtonType="Image"
StepNextButtonType="Image" StepNextButtonImageUrl="~/App_Themes/Default/images/buttons/continue.gif"
FinishPreviousButtonImageUrl="~/App_Themes/Default/images/buttons/back.gif"
FinishPreviousButtonType="Image" FinishCompleteButtonImageUrl="~/App_Themes/Default/images/buttons/save.gif"
FinishCompleteButtonType="Image" CancelButtonType="Image" CancelButtonImageUrl="~/App_Themes/Default/images/buttons/back.gif"
DisplaySideBar="false" >
<WizardSteps>
<asp:WizardStep Title="User Profile" ID="UserProfile" runat="server">
<uhc:ctlUserProfileEdit ID="ctlUserProfileEdit" runat="server">
</uhc:ctlUserProfileEdit>
<br clear="all" />
<div>
<asp:ImageButton ID="cmdResetPassword" runat="server" ImageUrl="~/App_Themes/Default/images/buttons/resetpassword.gif" />
</div>
<div>
<asp:UpdatePanel ID="upSchools" runat="server" ChildrenAsTriggers="true">
<ContentTemplate>
<uhc:ctlSchoolLocationSelector ID="ctlSchoolLocationSelector" runat="server" />
</ContentTemplate>
</asp:UpdatePanel>
</div>
</asp:WizardStep>
<asp:WizardStep Title="Roles" ID="Roles" runat="server">
<uhc:ctlPermissionInternal ID="ctlPermissionInternal1" runat="server"></uhc:ctlPermissionInternal>
<uhc:ctlPermissionExternal ID="ctlPermissionExternal1" runat="server"></uhc:ctlPermissionExternal>
</asp:WizardStep>
</WizardSteps>
</asp:Wizard>

I don't know for sure if this is what's causing it, but I find it strange that there is an UpdatePanel within the Wizard control, rather than the Wizard Control within the update panel. This may be causing some strange behavior.
Can you change this and see if the problem resolves itself?