call OnSelectedIndexChanged??

[Guest]

Does somebody knows, if there's a way to call the OnSelectedIndexChanged method of the dropdownlist by myself?

Or does somebody knows a way, to raise the SelectedIndexChanged Event of a dropdownlist?

tia
Martin

 

[Ken Cox [Microsoft MVP]]

Hi Martin,

You should be able to call the subroutine on your own as long as you pass
the parameters it expects.

Here's a way to do it on a button click:

Private Sub Button1_Click _
(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles Button1.Click
Dim earg As New EventArgs
Call DropDownList1_SelectedIndexChanged _
(DropDownList1, earg.Empty)
End Sub

Private Sub DropDownList1_SelectedIndexChanged _
(ByVal sender As Object, _
ByVal e As System.EventArgs) _
Handles DropDownList1.SelectedIndexChanged
Button1.Text = _
DropDownList1.SelectedValue.ToString
End Sub

<P>
<aspropDownList id="DropDownList1" runat="server">
<asp:ListItem Value="Red">Red</asp:ListItem>
<asp:ListItem Value="Green">Green</asp:ListItem>
<asp:ListItem Value="Blue">Blue</asp:ListItem>
</aspropDownList></P>
<P>
<asp:Button id="Button1" runat="server" Text="Button"></asp:Button></P>

Is this what you meant?

Ken
Microsoft MVP [ASP.NET]
Toronto

 

[Guest]

Thx for the reply but this is not what I mean, the problem is much more complicated.
I have the object of the dropdownlist, but I don't know how the eventhandler is called.

I am in a class outside of the page of the dropdownlist !

Hi Martin,

You should be able to call the subroutine on your own as long as you pass
the parameters it expects.

Here's a way to do it on a button click:

Private Sub Button1_Click _
(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles Button1.Click
Dim earg As New EventArgs
Call DropDownList1_SelectedIndexChanged _
(DropDownList1, earg.Empty)
End Sub

Private Sub DropDownList1_SelectedIndexChanged _
(ByVal sender As Object, _
ByVal e As System.EventArgs) _
Handles DropDownList1.SelectedIndexChanged
Button1.Text = _
DropDownList1.SelectedValue.ToString
End Sub

<P>
<aspropDownList id="DropDownList1" runat="server">
<asp:ListItem Value="Red">Red</asp:ListItem>
<asp:ListItem Value="Green">Green</asp:ListItem>
<asp:ListItem Value="Blue">Blue</asp:ListItem>
</aspropDownList></P>
<P>
<asp:Button id="Button1" runat="server" Text="Button"></asp:Button></P>

Is this what you meant?

Ken
Microsoft MVP [ASP.NET]
Toronto

Does somebody knows, if there's a way to call the OnSelectedIndexChanged
method of the dropdownlist by myself?

Or does somebody knows a way, to raise the SelectedIndexChanged Event of a
dropdownlist?

tia
Martin