C# page. 

I have two dropdowns. They are both independant of each other. When I select from one of the dropdowns data is displayed in a gridview. When I select from another dropdown the data is displayed based on that choice.

My problem is that the choice from the other dropdown is still selected so I cant select it again unless I select another choice from the same drop down.

How would I be able to change the selection in that dropdown list back to lets say "-- Select a Driver --" or "-- Select a Route --" .

Here are my dropdowns: 

<br />
<asp:Label ID="Label1" runat="server" Text="Driver:" Width="88px"></asp:Label>
<asp:DropDownList ID="DropDownList1" runat="server" Width="159px" AutoPostBack="True" DataSourceID="SqlDataSource1" DataTextField="employee_num" DataValueField="employee_name" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged" OnDataBound="DropDownList1_DataBound">
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:MobileDataConnectionString %>"
   SelectCommand="SELECT employee_num,  [first_name] +' '+[last_name] as employee_name FROM [employee]"></asp:SqlDataSource>
<br />
<asp:Label ID="Label6" runat="server" Text="Route:" Width="88px"></asp:Label>
<asp:DropDownList ID="DropDownList2" runat="server" Width="159px" AutoPostBack="True" DataSourceID="SqlDataSource2" DataTextField="rid" DataValueField="route_id" OnSelectedIndexChanged="DropDownList2_SelectedIndexChanged" OnDataBound="DropDownList2_DataBound">
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource2" runat="server" ConnectionString="<%$ ConnectionStrings:MobileDataConnectionString %>"
   SelectCommand="SELECT route, route_id, route + ', ' + CONVERT (char(3), route_id) AS rid FROM stop WHERE (DATEDIFF(dayofyear, date, GETDATE()) < 31) GROUP BY route, route_id">
</asp:SqlDataSource>

protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
{
txtEmployeeName.Text = "Name";
txtEmployeeNum.Text = "0";
//Resets the fields above so the data dosnt combine with route date.
txtRouteID.Text = DropDownList2.SelectedValue;
}

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
txtRouteID.Text = "0";
//Resets the field above so the data dosnt combine with the employee data.
txtEmployeeNum.Text = DropDownList1.SelectedItem.Text;
txtEmployeeName.Text = DropDownList1.SelectedValue;
}

protected void DropDownList1_DataBound(object sender, EventArgs e)
{
DropDownList1.Items.Insert(0, new ListItem("-- Select By Driver --"));
}

protected void DropDownList2_DataBound(object sender, EventArgs e)
{
DropDownList2.Items.Insert(0, new ListItem("-- Select By Route --"));
//Problems:--> not an INT = when selected will cause an error.
}

So if any one has any input on how I can acomplish this it will be greatly apreciated.

 Set EnableViewState = "false" in the dropdowns.

Sorry mate cant get exactly what you want. Can you be little more clear on what you want?

 Why don't you just set the opposite dropdownlists selected value to the inital value when the other is selected?

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{   
    txtRouteID.Text = "0";
    //Resets the field above so the data dosnt combine with the employee data.
    txtEmployeeNum.Text = DropDownList1.SelectedItem.Text;
    txtEmployeeName.Text = DropDownList1.SelectedValue;
    DropDownList2.SelectedIndex = 0;
}

Then do the same type of thing for your other DDL.

You could try adding a DropDownList1.SelectedIndex = 0 in your DropDownList1_DataBound. Will it do the trick for you?

OK thank you every one for your input I was able to do what I wanted using Kelsey's advice.