Higlight dropdown list item

[pavanip]

Hi,

I am having 2 dropdown lists 1st dropdownlist contains A-Z list.2nd dropdown list contains some names like akila,bindu,chinni,....zibra etc.
when i select name in 2nd dropdown list, the first letter of that name should be highlight in 1st dropdown.eg. i select chinni then "C" should be highlight in 1st dropdown. Please help me how to resolve this problem.


Thanks in advance
Pavani

[Frinavale]

If you want to solve this using ASP.NET, enable "AutoPostBack" for the second DropDownList and then implement a method that will handle that control's SelectedIndexChanged Event.

For example, you'd set AutoPostBack="True" in your second DropDownList:

<asp:DropDownList ID="mySecondDropDownList" runat="server" AutoPostBack="True"></asp:DropDownList>

And then in your VB.NET code (or C# code) implement a method that handles the SelectedIndexChanged Event:

Private Sub mySecondDropDownList_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles mySecondDropDownList.SelectedIndexChanged
    'In this method you want to check the what letter the
    'mySecondDropDownList.SelectedItem.Text  starts with
    'and then select the corresponding item in 
    'the firstDropDownList
End Sub
 

-Frinny

[pavanip]

Thanks for your response I got solution for my problem using the following code

foreach (ListItem item in ddlcont.Items)
{
    if (item.Text.StartsWith(txtcont.Text, StringComparison.CurrentCultureIgnoreCase))
    {
        ddlcont.SelectedIndex = ddlcont.Items.IndexOf(item);
     }
}

[Frinavale]

Does your code actually work for you?
Why are you looping through all of the items in your DropDownList?

[shweta123]

Hi,

You can try the following code in SelectedIndexChanged event of second dropdownbox.

protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
    {
       //Here get the first character of the string item selected
 
        string strchar = DropDownList2.SelectedItem.Text.Substring(0, 1).ToString();
 
        // Highlight the item in the other dropdown accordingly
 
        DropDownList1.SelectedItem.Text = strchar;
 
    }

Note : Please make Autopostback property = true for Dropdownlist2 in order to work the above specified code.