User1535942433 posted
Hi volar.2016，
What the controls load depend of? Can I manage it?
As far as I think,you couldn't manage the order the order of the loads.OnItemDataBound is modified after it is bound to an item in the Repeater control but before it is rendered on the page. And DataBound is raised at the end of the data binding
operation in the data bound control.The error is not relation of the order.
This is because the repeater has not elements.
The error is when you are excuting the onitemdatanound event,the item didn't databound.
Accroding to your codes,I have create a demo.When the repeater index=0.then you will find the Literal control.You could bind the data of dropdownlist in the codes.
More details,you could refer to below codes:
<div>
<asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="Repeater1_ItemDataBound">
<HeaderTemplate>
<asp:Label runat="server" Text="text"></asp:Label>
</HeaderTemplate>
<ItemTemplate>
<asp:Literal ID="Literal1" runat="server" Text='<%# Eval("Year") %>'></asp:Literal>
</ItemTemplate>
</asp:Repeater>
</div>
<asp:DropDownList ID="DropDownList1" runat="server" OnDataBound="DropDownList1_DataBound" AutoPostBack="false"></asp:DropDownList>
Code-behind:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Me.IsPostBack Then
Me.BindDrop()
Me.BindRepeater()
End If
End Sub
Private Sub BindRepeater()
Dim constr As String = ConfigurationManager.ConnectionStrings("aspnet-TestApplicationWithDatabase-20190820030542").ConnectionString
Using con As SqlConnection = New SqlConnection(constr)
Using cmd As SqlCommand = New SqlCommand("SELECT * FROM Sum", con)
Using sda As SqlDataAdapter = New SqlDataAdapter(cmd)
Dim dt As DataTable = New DataTable()
sda.Fill(dt)
Repeater1.DataSource = dt
Repeater1.DataBind()
End Using
End Using
End Using
End Sub
Private Sub BindDrop()
Dim constr As String = ConfigurationManager.ConnectionStrings("aspnet-TestApplicationWithDatabase-20190820030542").ConnectionString
Using con As SqlConnection = New SqlConnection(constr)
Using cmd As SqlCommand = New SqlCommand("SELECT * FROM Sum", con)
Using sda As SqlDataAdapter = New SqlDataAdapter(cmd)
Dim dt As DataTable = New DataTable()
sda.Fill(dt)
DropDownList1.DataSource = dt
DropDownList1.DataTextField = "Id"
DropDownList1.DataValueField = "Id"
DropDownList1.DataBind()
End Using
End Using
End Using
End Sub
Protected Sub DropDownList1_DataBound(sender As Object, e As EventArgs)
If (DropDownList1.Items.Count > 0) Then
For Each li As ListItem In DropDownList1.Items
li.Text = Server.HtmlDecode(li.Text)
Next
End If
End Sub
Protected Sub Repeater1_ItemDataBound(sender As Object, e As RepeaterItemEventArgs)
If e.Item.ItemType = ListItemType.Item OrElse e.Item.ItemType = ListItemType.AlternatingItem Then
If e.Item.ItemIndex = 0 Then
If DirectCast(e.Item.FindControl("Literal1"), Literal).Text = 0 Then
'Label1.Text = "1"
DropDownList1.Items(2).Enabled = False
Else
DropDownList1.SelectedValue = 3
End If
End If
End If
End Sub
Best regards,
Yijing Sun
