Dropdownlist Reset SelectedValue

asp.net drop-down-menu selectedvalue
s.e picture s.e · Apr 12, 2012 · Viewed 41.7k times · Source

I have a DropDownList connected to an ObjectDataSource. In my page load i set the selectedvalue to a specific value depending on the case. How can I in my method selectedindexchanged "reset" the selectedvalue so you still can choose from the other options? Or should I not use selectedvalue to set the defaultvalue of the dropdownlist?

 <asp:DropDownList ID="DropDownList" runat="server" DataSourceID="ObjectDataSource" DataTextField="Type" DataValueField="TypeId" 
    AutoPostBack="true" onselectedindexchanged="DropDownList_SelectedIndexChanged" >
            </asp:DropDownList>

protected void Page_Load(object sender, EventArgs e)
{
        int default = category.TypeId;
        DropDownList.SelectedIndex = default;

}

protected void DropDownList_SelectedIndexChanged(object sender, EventArgs e)
{

    int id = int.Parse(DropDownList.SelectedValue);
    Session["id"] = id;
}

Answer

Deepu Madhusoodanan picture Deepu Madhusoodanan · Apr 12, 2012

You can use ClearSelection method for Dropdown list

DropDownList.ClearSelection();

Thanks

Deepu

Related questions

Dropdown list selected value not working

In my ASP.NET project. I have two dropdownlist and a checkbox. When the checkbox is checked, the selected value of DropDownList1 must be same as selcted value of the DropDownList2. But the DropDownList1.SelectedValue is not working. Here is …

Read More
Asp.NET DropDownList SelectedItem.Value not changing

markup: <div style="float:left;margin-top:15px;width:80px"> <asp:DropDownList ID="MyList" runat="server" Width="100px"></asp:DropDownList> </div> code: // clear vehicles list MyList.Items.Clear(); // add 'all' option MyList.Items.…

Read More
ASP:DropDownList in ItemTemplate: Why is SelectedValue attribute allowed?

This piece of code <asp:DropDownList runat="server" ID="testdropdown" SelectedValue="2"> <asp:ListItem Text="1" Value="1"></asp:ListItem> <asp:ListItem Text="2" Value="2"></asp:ListItem> <asp:ListItem Text="3" Value="3"></…

Read More