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Dropdown change cause gridview to loose data and selected index change doesn't fire

Posted on 2009-07-11
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Last Modified: 2012-05-07
I changed the selection from my dropdown:
my selectedindex change does not get fired.
first time it keeps my selection on the gridview.
if i change dropdown again i loose selection and it resets my dropdown.
part of data does not get set on my gridview.


usercontrol 1 =========================================================

pageload

if not ispostback then

MainGridView.datasource = ds

MainGridView.databind()

end if
 

code:

If e.Row.RowType = DataControlRowType.DataRow Then 

 Dim myrow As GridViewRow = e.Row
 

                        If e.Row.RowIndex = 0 Then

                            Dim ucg As UCGridview

                            ucg = CType(myrow.FindControl("Details"), UCGridview)
 

                            Dim detgridview As GridView = CType(ucg .FindControl("detailsGridview"), GridView)

                            detgridview .DataSource = ds

                            detgridview .DataKeyNames = New String() {"ID"}

                            detgridview .DataBind()

                          End If

end if

markup

<asp:GridView ID="MainGridView" runat="server" AutoGenerateColumns="false" EnableViewState="true">

                    <Columns>

                        <asp:TemplateField ItemStyle-VerticalAlign="Top" HeaderText="MainHeading">

                            <ItemTemplate>

                                <uc:DetailsID="Details" runat="server" />

                            </ItemTemplate>

                        </asp:TemplateField>

                    </Columns>

                </asp:GridView>
 

UCGridview =====================================================================

markup part:

<asp:TemplateField ItemStyle-VerticalAlign="Top" HeaderText="Products" Visible="True">

            <ItemTemplate>

            <asp:UpdatePanel runat="server" ID="ProductsDropDownListUpdatePanels" UpdateMode="Conditional">

                <ContentTemplate>

                <asp:DropDownList ID="Products" runat="server" EnableViewState="true" AppendDataBoundItems="true"

                    AutoPostBack="true">

                    <asp:ListItem Text="1">1</asp:ListItem>

                    <asp:ListItem Text="2">2</asp:ListItem>

                   </asp:DropDownList>

                </ContentTemplate>

            </asp:UpdatePanel>

                

            </ItemTemplate>

        </asp:TemplateField>

Code:

    Private Sub ProductsDropDownList_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles ProductsDropDownList.SelectedIndexChanged
 

    End Sub

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Comment
Question by:Padre_Corleone
2 Comments
 
LVL 15

Expert Comment

by:jinal
ID: 24830084
Hello ,

In order to SelectedIndexChanged fired need to set AutoPostBack = true for DropDownList. Please set that and test.
0
 
LVL 7

Accepted Solution

by:
Padre_Corleone earned 0 total points
ID: 24856599
the issue was that every dropdown change, i was reloading this User control.  avoiding reloading of control also avoided that not firing event. thanks!
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