DropDownList - limit number of lines shown

[snufse]

Is it possible to limit number of lines being shown in the drop down list? Example, If I have 200 lines being filled I only want 10 lines to show and then use scrolldown to view the entire list. Thank you.

[brucevde]

The DropDownList asp.net control generates a <select> html element which has a size attribute which indicates the number of visible elements.

You can add the attribute to the DropDownList control.

<aspropDownList ID="DropDownList1" runat="server" Size="10" >

Visual Studio will indicate that Size is not an attribute of the DropDownList but this is just informational, the attribute gets written in the final html. eg

<select name="DropDownList1" id="DropDownList1" Size="10">

You could also add the Size attribute at runtime.

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    DropDownList1.Attributes.Add("Size", "10")
End Sub

[snufse]

Hi brucevde,

That seems to do the trick. I need to set the size at the time when user clicks the down arrow and then display the number of lines I want. I tried to find the event for this, is there any? Thank you for your help.

[mendhak]

Why do you need to do it when the select element is clicked? Do you want to change the size dynamically at runtime?

Also, the size property will make it a 'listbox' rather than limit the number of visible items in the dropdownlist. Is that what you want?

[mendhak]

To do it using javascript

<select onclick="this.size=4;">
<option>sdf</option>
<option>sdf</option>
<option>sdf</option>
<option>sdf</option>
<option>sdf</option>
<option>sdf</option>
<option>sdf</option>
<option>sdf</option>
<option>sdf</option>
<option>sdf</option>
</select>