CODEWITHSUNDEEP
asp.netdrop-down-menu
Tabloo Quijico
Tabloo Quijico

Reputation: 700

get selectedValue() of dropDownList after setting the value

I have a databound dropdownlist on a page, where in the page_load I set the selectedValue (inside a 'not isPostBack').

Although the page displays fine and shows the correct item as selected.. inside the page_load if I try and get the selectedValue() and display it to the screen, I always get null... selectedIndex is -1.

I have a button, which when clicked refers to this ddl's selectedValue, and here it pulls through the the expected result.. so how come I can't see it immediately after setting it, while still in page_load?

cheers :)

edit: the code..

ddl declaration

<asp:DropDownList runat="server" ID="dlCountryList" DataSourceID="dsCountryList"
                DataValueField="countrylistid" DataTextField="description">
</asp:DropDownList>

and the page_load

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
     dlCountryList.SelectedValue = "GR"
     Response.Write("*" + CStr(dlCountryList.SelectedIndex) + "*")
End Sub

Upvotes: 1

Views: 1523

Answers (1)

Shadow Wizard
Shadow Wizard

Reputation: 66389

Manually call the DataBind() method of the drop down after setting the selected value.

The SelectedValue is not ordinary get/set property of the control, by setting it you only set some "flag" that is used when the drop down is binded.

By default it's binded after the Page_Load event (not sure which event exactly) but it's also possible to call it manually.

Upvotes: 1

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