Databases
StackOverflow2013
Postsdbo
POdynamically created Dropdownlist in a dynamically created updatepanel will generate a full page reload
Body
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POdynamically created Dropdownlist in a dynamically created updatepanel will generate a full page reload
    text
    copied!<p>I have a page witch builds lots of updatepanel with controls in them on the pre_init. (and sometimes I have updatepanels inside another updatepanel)</p> <p>In a table cell, I have a dropdownlist and a checkbox. They are both autopostack. They have the exact same code behind (one on checkedChanged and the other on selectedindexchaged).</p> <p>The checkbox will work perfectly. The dropdownlist on the other hand is causing a full page reload ...</p> <p>Anyone has a clue why ? I've lost soooooo many time on this ... </p> <p>Thanks !</p> <p>CodeBehind : Public Class ProductBuilder2 Inherits System.Web.UI.Page</p> <pre><code>Private Sub ProductBuilder2_PreInit(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.PreInit BuildProduct(Request.QueryString("ProductID")) End Sub Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Not Page.IsPostBack Then BindProductID() End If End Sub Protected Sub BuildProduct(ByVal ProductID As Integer) Dim xMasterProd As New cProduct(ProductID) If xMasterProd.IsGroup Then For Each xKitProd As cKit In xMasterProd.Kit If xKitProd.Product.IsGroup Then Renderer.Controls.Add(CreateGroup(xKitProd.Product, xKitProd.DoNotInclude)) End If If Not xKitProd.Product.IsGroup Then Renderer.Controls.Add(CreateProduct(xKitProd.Product, xKitProd.DoNotInclude)) End If Next End If If Not xMasterProd.IsGroup Then Renderer.Controls.Add(CreateProduct(xMasterProd, False)) End If End Sub Public Function CreateProduct(ByRef xProduct As cProduct, _ ByVal DoNotInclude As Boolean) As UpdatePanel Dim xTable As New Table Dim xTR As New TableRow Dim xTD As New TableCell xTable.CssClass = "Container" Dim lblProductName As New Label lblProductName.Text = xProduct.Name xTD.CssClass = "ProductName" xTD.Attributes.Add("colspan", "3") xTD.Controls.Add(lblProductName) xTR.Controls.Add(xTD) If DoNotInclude Then Dim xChkDNI As New CheckBox xChkDNI.Text = "Do not include" xChkDNI.CssClass = "DoNotInclude" xChkDNI.AutoPostBack = True AddHandler xChkDNI.CheckedChanged, AddressOf DoNotInclude_CheckedChanged xTD.Controls.Add(xChkDNI) xTR.Controls.Add(xTD) End If xTable.Controls.Add(xTR) xTR = New TableRow xTD = New TableCell Dim lblProductDescription As New Label lblProductDescription.Text = xProduct.Description xTD.Attributes.Add("colspan", "3") xTD.CssClass = "ProductDescription" xTD.Controls.Add(lblProductDescription) xTR.Controls.Add(xTD) xTable.Controls.Add(xTR) For Each xOpt As cOption In xProduct.OptionLabels xTR = New TableRow xTD = New TableCell xTD.CssClass = "ProductDescription" xTD.Style.Add("width", "150px;") Dim xlblOptionLabel As New Label xlblOptionLabel.Text = xOpt.LabelText &amp; " : " xTD.Controls.Add(xlblOptionLabel) xTR.Controls.Add(xTD) xTD = New TableCell Dim DropOptionID As New DropDownList xTD.Controls.Add(DropOptionID) xTR.Controls.Add(xTD) xTable.Controls.Add(xTR) For Each OptionID As cOption In xOpt.Options Dim xListItem As New ListItem xListItem.Text = OptionID.LabelText xListItem.Value = OptionID.ID If OptionID.IsDefault Then xListItem.Selected = True DropOptionID.Items.Add(xListItem) Next xTD = New TableCell Dim lblMessage As New Label lblMessage.Text = xOpt.Message lblMessage.CssClass = "Message" If xOpt.Message = "" Then lblMessage.Visible = False xTD.Controls.Add(lblMessage) xTR.Controls.Add(xTD) xTable.Controls.Add(xTR) Next Dim UP As UpdatePanel = CreateUpdatePanel("UP-" &amp; xProduct.ID) UP.ContentTemplateContainer.Controls.Add(xTable) Return UP End Function Public Function CreateGroup(ByRef xProduct As cProduct, _ ByVal DoNotInclude As Boolean) As UpdatePanel '1st create the group container Dim xTable As New Table Dim xTR As New TableRow Dim xTD As New TableCell xTable.CssClass = "Container" xTD.CssClass = "ProductGroup" xTD.Attributes.Add("colspan", "3") Dim xLabel As New Label xLabel.Text = xProduct.Name &amp; " : " xTD.Controls.Add(xLabel) Dim DropProdID As New DropDownList DropProdID.AutoPostBack = True DropProdID.ID = "DropProdID" &amp; xProduct.ID AddHandler DropProdID.SelectedIndexChanged, AddressOf DropProdID_SelectedIndexChanged Dim Trigger As New PostBackTrigger Trigger.ControlID = DropProdID.ID xTD.Controls.Add(DropProdID) xTR.Controls.Add(xTD) If DoNotInclude Then Dim xChkDNI As New CheckBox xChkDNI.Text = "Do not include" xChkDNI.CssClass = "DoNotInclude" xChkDNI.AutoPostBack = True AddHandler xChkDNI.CheckedChanged, AddressOf DoNotInclude_CheckedChanged xTD.Controls.Add(xChkDNI) xTR.Controls.Add(xTD) End If xTable.Controls.Add(xTR) For Each xKitProd As cKit In xProduct.Kit Dim xListItem As New ListItem xListItem.Text = xKitProd.Product.Name xListItem.Value = xKitProd.Product.ID If xKitProd.IsDefault Then xListItem.Selected = True If Not xKitProd.Product.IsGroup Then xTR = New TableRow xTD = New TableCell xTD.Controls.Add(CreateProduct(xKitProd.Product, xKitProd.DoNotInclude)) xTR.Controls.Add(xTD) xTable.Controls.Add(xTR) End If For Each xProd As cKit In xKitProd.Product.Kit xTR = New TableRow xTD = New TableCell xTD.Controls.Add(CreateProduct(xProd.Product, xProd.DoNotInclude)) xTR.Controls.Add(xTD) xTable.Controls.Add(xTR) Next End If DropProdID.Items.Add(xListItem) Next Dim UP As UpdatePanel = CreateUpdatePanel("UP-" &amp; xProduct.ID) UP.ContentTemplateContainer.Controls.Add(xTable) UP.Triggers.Add(Trigger) Return UP End Function Protected Sub DoNotInclude_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs) Dim xChk As CheckBox = CType(sender, CheckBox) Dim xTable As Table = xChk.Parent.Parent.Parent Dim UP As UpdatePanel = xTable.Parent.Parent Dim Index As Integer = 1 For Each xTR As TableRow In xTable.Rows If Index &lt;&gt; 1 Then xTR.Visible = Not xChk.Checked End If Index += 1 Next UP.Update() End Sub Protected Sub DropProdID_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Dim DropProdID As DropDownList = CType(sender, DropDownList) Dim xTable As Table = DropProdID.Parent.Parent.Parent Dim UP As UpdatePanel = xTable.Parent.Parent Dim Index As Integer = 1 For Each xTR As TableRow In xTable.Rows If Index &lt;&gt; 1 Then xTR.Visible = False 'xTable.Rows.RemoveAt(Index) End If Index += 1 Next 'Dim xProduct As New cProduct(DropProdID.SelectedValue) 'If xProduct.IsGroup Then 'End If 'If Not xProduct.IsGroup Then ' Dim xTR As New TableRow ' Dim xTD As New TableCell ' xTD.Controls.Add(CreateProduct(xProduct, False)) ' xTR.Controls.Add(xTD) ' xTable.Controls.Add(xTR) 'End If UP.Update() End Sub Public Sub RenderPanel(ByRef xPanel As Panel) Renderer.Controls.Add(xPanel) End Sub Public Function CreateUpdatePanel(ByVal ID As String) As UpdatePanel Dim UP As New UpdatePanel() UP.ID = ID UP.UpdateMode = UpdatePanelUpdateMode.Conditional UP.RenderMode = UpdatePanelRenderMode.Inline UP.ChildrenAsTriggers = False Return UP End Function Private Sub ProductID_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ProductID.SelectedIndexChanged Response.Redirect("ProductBuilder2.aspx?ProductID=" &amp; ProductID.SelectedValue) End Sub Protected Sub BindProductID() Dim xProd As New cProduct ProductID.DataTextField = "Name" ProductID.DataValueField = "ID" ProductID.DataSource = xProd.ToList() ProductID.DataBind() End Sub </code></pre> <p>End Class</p> <p>.aspx :</p> <pre><code>&lt;%@ Page Language="vb" AutoEventWireup="false" CodeBehind="ProductBuilder2.aspx.vb" Inherits="OLO3._0._0.ProductBuilder2" %&gt; </code></pre> <p>&lt;%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %></p> <p></p> <p> OLO3.0 / Product Builder .Container {margin: 10px 10px 10px 10px; background-color: #ffffff; border: 1px solid #c2c2c2; width: 98%;} .ProductGroup {background-color: #c3e7b4; border: 1px solid #417b2a; padding: 5px 5px 5px 5px; font: 10pt Verdana; font-weight: bold; color: #417b2a;} .ProductName {background-color: #d8e4f0; border: 1px solid #567db0; padding: 5px 5px 5px 5px; font: 10pt Verdana; font-weight: bold; color: #567db0;} .ProductDescription {padding: 5px 5px 5px 5px; font: 9pt Verdana;} .Message {background-color: #f8d7d8; border: 1px solid #ed2227; padding: 2px 2px 2px 2px; font: 10pt Verdana;} .DoNotInclude {font : 9pt Verdana; margin-left: 20px; font-weight: normal;} </p> <pre><code>&lt;asp:ScriptManager ID="SM1" runat="server"&gt;&lt;/asp:ScriptManager&gt; &lt;telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" Skin="Sitefinity" DecoratedControls="All" /&gt; &lt;table border="0" cellpadding="0" cellspacing="0" width="100%"&gt; &lt;tr&gt; &lt;td colspan="3" align="center"&gt;&lt;img src="../Img/Logo.png" alt="Paradox" style="padding-top: 20px; padding-bottom: 20px;" /&gt;&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td style="width: 150px;" valign="top"&gt;Product Tree (150px) &lt;asp:DropDownList ID="ProductID" runat="server" AppendDataBoundItems="true" Width="140" AutoPostBack="true"&gt;&lt;asp:ListItem Text="Select a product" Value=""&gt;&lt;/asp:ListItem&gt;&lt;/asp:DropDownList&gt; &lt;/td&gt; &lt;td valign="top" style="background-color: #f2f2f2;"&gt; &lt;asp:Panel ID="Renderer" runat="server"&gt; &lt;/asp:Panel&gt; &lt;asp:UpdatePanel ID="UPMessage" runat="server" UpdateMode="Conditional" RenderMode="Inline"&gt; &lt;ContentTemplate&gt; &lt;asp:Label ID="lblmessage" runat="server"&gt;&lt;/asp:Label&gt; &lt;/ContentTemplate&gt; &lt;/asp:UpdatePanel&gt; &lt;/td&gt; &lt;td style="width: 300px;" valign="top"&gt;Cart Resume (300px)&lt;/td&gt; &lt;/tr&gt; &lt;tr&gt; &lt;td colspan="3"&gt;Footer&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; &lt;/form&gt; </code></pre> <p> </p>
 

Querying!

 
Guidance
An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload