I'd like to programmatically force a full page postback to occur after an event is fired by one of the child controls. I can't add any triggers to make this work so it will have to be done via code.
View 2 Replies
I found this solution to force full postbacks from within an UpdatePanel
<Triggers>
<asp:PostBackTrigger ControlID="controlID" />
</Triggers>
but my control is actually inside an ItemTemplate nested in a GridView. Therefore when my page loads, it doesn't find that control.
How can I force a full postback from my control (an asp:LinkButton) from within my GridView?
c# - How do I force full post-back from a button within an UpdatePanel?
View 3 RepliesHow do force full page rendering in async call process?
[Code]....
Is something like this possible?
Dim iCounter as Integer
Dim iQuantity as Integer = 10
Protected Sub btnFoo_Click Handles btnFoo Yadda
For i as Integer = iCounter to iQuantity - 1
//do something with AsyncPostBackTrigger until iCounter = iQuantity - 1
//then trigger a full postback
Next
End Sub
I am new to the concept and feel like there must be something really easy that I am missing.
I implemented the AsyncFileUpload control on a web page. This web page requires uploaded files to appear in a gridview. The gridview contains the following columns: "File Name", "Confidential" Check Box, and a "Remove" button to remove the uploaded file.
Since the AsyncFileUpload postback does not do a full page postback, I need to "force" a postback on the OnClientUploadComplete event of the AsyncFileUpload control in order to render the gridview after uploading a file. In the OnClientUploadCompleteevent, I use javascript to call __doPostBack. In this postback, I only bind my gridview and display the file information (I don't re-save the file).
The problem: On the AsyncFileUpload's first "partial" postback, the file is successfully uploaded, as expected. On the second postback that I force with __doPostBack, the file is re-uploaded. You can verify this by using Google Chrome, which displays the upload progress. The behaviour is as follows: After selecting the file, the progress increments from 0% to 100% and the file is uploaded. After this, the __doPostBack executes, and you can see the upload progress increment again from 0% to 100%.
How can I make sure the Gridview is properly populated, but that the file is not uploaded twice?
I attached a sample solution which contains the issue:
[URL]
I have a webpage with a button. If I click the button and enter the event handler for the click event (so I have actually a postback) I want to force a second postback in this event handler.(Background for this weird seeming request is: I change the theme of the page in the button click event handler. To make this change immediately visible I need to pass the PreInit event of the page again.)At the moment I force a "refresh" of the page by redirecting the page to itself:
[Code]....
But this clears all controls on the page as if I would enter the page the very first time. For instance, a textbox already filled out by the user is emptied. But I want only a postback which does not change any control contents.
I have a login form on the home page of an ASP.NET 3.5 website which for performance reasons needs to be accessed with a standard HTTP connection. Since the normal postback for an ASP.NET page is relative call for the post, it would mean that when the browser posts the values are sent unprotected.
I would like to do one of two things to make this secure:
Force the Postback to be secure to the same page Send the post to a different page using an HTTPS connection
Is there a way to implement option one?
I'm also looking at the Authentication Service, but looking at the URL reference it is using a relative path:
Sys.Services._AuthenticationService.DefaultWebServicePath = '../Authentication_JSON_AppService.axd';
I don't see a way to override this to put in an HTTP path.
I'm having a problem with entering edit mode in Gridview. When I click edit, it shows it in normal mode (labels) even though RowCommand does successfully fire.
But I have to click it AGAIN to get it to show the TextBoxes of 'Edit' mode.
How can I fix this? Is there a way to force a 'postback' on the entire page, or re-render a control? (i'm assuming thats the problem)
Here's the pseudo code:
GridView1_RowCommand(....)
If e.CommandArgument = "EDIT" then
GridView1.EditIndex = 5
End IF
End Function
A click of the 'edit' button returns the gridview with the normal labels. Then when I click it again, the TextBoxes show up.
What is the best practice to force the postback Data and ViewState data to be re-loaded on the code behind?
The reason I ask this is, i have one gridview which is generated dynamically and I when it is structure is generated the postback data is already loaded and I want to forse asp.net to reload the postback data once I have my gridView structure is generated.
How can I achieve this?
I've created a UserControl that is dynamically placed onto my page during the Init event. It populates and works great, but I'm left scratching my head at how to retrieve data from it during a postback.
It's effectively a multipick combobox that is manipulated entirely using clientside JavaScript (I'm using jQuery heavily). Inside the control container element, I render an empty DIV element that contains all of the selected items. As the user selects items, I generate DIVs within that container DIV that includes some markup. Of interest to me on the server side are the contents of a couple of INPUT fields.
After selecting an item, the rendered HTML looks something like:
[code]....
I may be completely off track and this may actually be impossible (or a stupid idea). The only alternative I can think of is to emit actual ASP.NET controls and hook the built-in event handlers.
I think my title says it all. I have a modal dialog showing up and the user can make some changes and then click a 'Save' button. I need that to totally post back the whole page. I just assumed the button would fire off regardless of the jQuery.
View 2 RepliesI am using asp.net 3.5 and use master pages for most of the website. I need to make sure that users after they logout are not able to use the back button to see in cache data.
View 4 RepliesI can create an ActiveX control to active F11 to enable full screen mode, but would rather not. Is there an easier way?
View 3 RepliesI have two checkboxes: cb1 and cb2. They are both hooked up to an onClick event which checks if at least one checkbox is clicked. If this is not the case, it throws an alert and reverts the change. If a legal change was made (e.g. cb2 was checked, followed by cb1 being unchecked), the function calls the server function checkChange() which needs the object and eventargs.
I'm having trouble with the following:
Reverting the change: how can i find out which checkbox was clicked without adding an extra javascript function for the second checkbox? This has to be a scalable solution as more checkboxes may be added later.
How do I call the server function checkChange(). I am aware of "this.Page.GetPostbackEventReference" but I am confused as to the parameters it takes.
i have upgrade my website from framework 2.0 to 3.5 but i have problem with ajax .I get full postback when i click a linkbutton inside update panel .
View 14 RepliesI'm having few UpdatePanels on my master page. And then, I have RadTreeViewcontrol on the page, that should cause partial postback each time node is clicked. Everything works fine there. Since I'm using the same tree on some other pages, I moved this functionality to UserControl. Stuff I've done before, so no problem. Moved some code to ascx, created some events. Everything always worked for me well. But not now. RadTreeView is nested inside UserControl, and this control on master page with update panels, see below:
<asp:Panel ID="pnlContentWrapper" runat="server" CssClass="ContentWrapper">
<div id="HeaderBreadCrumb">
<asp:ContentPlaceHolder ID="HeaderBreadCrumbContent" runat="server" />
</div>
<div id="HeaderMenu">
<asp:UpdatePanel ID="upnlTreeMenu" runat="server">
<ContentTemplate>
<asp:ContentPlaceHolder ID="HeaderMenuContent" runat="server" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="treeProductTree" />
</Triggers>
</asp:UpdatePanel>
</div>
<div id="TreeDiv">
<fp:ProductTree ID="treeProductTree" runat="server" />
</div>
<asp:Panel ID="ContentDiv" ClientIDMode="Static" runat="server">
<asp:UpdatePanel ID="upnlTreeContent" runat="server">
<ContentTemplate>
<asp:ContentPlaceHolder ID="TreePageContent" runat="server" />
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="treeProductTree" />
</Triggers>
</asp:UpdatePanel>
</asp:Panel>
</asp:Panel>
And the user control is really simple:
<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="ProductTree.ascx.vb"
Inherits="ProductTree" %>
<div>
<telerik:RadTreeView ID="treeProductTree" ClientIDMode="Static" runat="server" EnableDragAndDrop="false"
SkinID="CustomSkin" CssClass="MasterProductTree" DataFieldID="NodeId" DataFieldParentID="NodeParentId"
DataTextField="NodeName" DataValueField="NodeId" />
</div>
And some code behind:
Imports Telerik.Web.UI
Public Class ProductTree
Inherits System.Web.UI.UserControl
Public Event NodeExpand As EventHandler(Of ProductTreeNodeExpandEventArgs)
Public Event SelectedNodeChange As EventHandler
Protected Sub ProductTree_NodeExpand(ByVal sender As Object, ByVal e As RadTreeNodeEventArgs) _
Handles treeProductTree.NodeExpand
Dim nodeId As Integer = CInt(e.Node.Value)
Dim evetArgs = New ProductTreeNodeExpandEventArgs(nodeId)
RaiseEvent NodeExpand(Me, evetArgs)
//'some logic
End Sub
Protected Sub ProductTree_OnNodeClick(ByVal sender As Object, ByVal e As RadTreeNodeEventArgs) _
Handles treeProductTree.NodeClick
RaiseEvent SelectedNodeChange(Me, New System.EventArgs())
End Sub
End Class
What I don't know is: why is this causing full postback instead of partial? I suspect that it may have something to do with raising my for SelectedNodeChange, but I don't know how to deal with it other way. I need to let other components know, that node selection changed. How can I improve this to make it work with UpdatePanels?
I have run into what seems to be a very famous problem: My updatepanel fires a full postback instead of a async postback. The normal solution is to give all controls you add dynamically an ID, which I have done, but I still get a full postback instead of my async postback. Here's the code:
HTML:
<asp:UpdatePanel ID="ItemsUpdatePanel" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="False">
<Triggers>
</Triggers>
<ContentTemplate>
<asp:ListView ID="PlayerItems" runat="server" GroupItemCount="5"
onitemdatabound="PlayerItems_ItemDataBound">
<LayoutTemplate>
... Listview stuff ...
</asp:ListView>
</ContentTemplate>
</asp:UpdatePanel>
The interesting part is the C# code behind (method PlayerItems_ItemDataBound), which is like the following:
ImageButton imgBtn = new ImageButton();
imgBtn.ID = "itemBtn";
imgBtn.Width = Unit.Pixel(30);
imgBtn.ImageUrl = "~/Images/Game/Items/" + myItem.ItemImageUrl;
ContextMenu menu = new ContextMenu();
menu.BoundControls.Add(imgBtn);
menu.ItemCommand += new CommandEventHandler(menu_ItemCommand);
menu.AutoHide = true;
menu.RolloverColor = Color.Gray;
menu.ID = "MenuMenu";
Panel panel = (Panel)(e.Item.FindControl("ItemPanel"));
panel.Controls.Add(imgBtn);
panel.Controls.Add(menu);
AsyncPostBackTrigger trig = new AsyncPostBackTrigger();
trig.ControlID = menu.UniqueID;
trig.EventName = "ItemCommand";
ItemsUpdatePanel.Triggers.Add(trig);
So, I actually add an AsyncPostBackTrigger to the menu, so the ItemCommand event should be registered. What happends when I click an item in this contextmenu, is a full postback happends. I have been trying to play with the ChildrenAsTriggers property without help.
I have an UpdatePanel with a button that, when clicked, calls a WebService. I attached an UpdateProgress to it that shows a "loading" gif while it runs. Everything works fine, but I need a full PostBack once the operation is complete because I'm using my company's custom template that displays an info message and enables a "Next" button upon completion.I've had partial success with the endRequestHandler but I'm not sure what to put in my function to force a full postback once the UpdatePanel has run its course. I'm getting into the endRequestHandler function but I have been unable to successfully get a full PostBack.Here is my current code (including several attempts), the bottom part being the focus:
[Code]....
I am having to create a GridView 100% in C# CodeBehind. I have it selecting a row and posting back using this code:
void dataGrid_ItemCreated(object sender, DataGridItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.AlternatingItem ||
e.Item.ItemType == ListItemType.Item)
{
e.Item.Attributes.Add("onmouseover",
"this.style.backgroundColor='beige';this.style.cursor='pointer'");
e.Item.Attributes.Add("onmouseout",
"this.style.backgroundColor='#FFFFFF';");
e.Item.Attributes.Add("onclick", "javascript:__doPostBack" +
"('_ctl0$DataGrid1$_ctl" +
((Convert.ToInt32(e.Item.ItemIndex.ToString())) + 2) +
"$_ctl0','')");
}
}
This does post back but then how do I get the ID of the row the user clicked on?
I want to do something similar to what happens when you click an asp.net button that has a PostBackURL set. I've tried Server.Transfer but the URL doesn't change (which is something I want). Is there a better way to do this, or alternatively is there a way to make Server.Transfer display the correct URL?
View 2 RepliesI have never done jquery and need some assistance/advice on something I am trying to do.I basically have an ASP.NET MVC Application.
What I want to do is, asynchronously be able to do a partial postback when a button is pressed.It's a simple application that should add items and retrieve existing items from an IEnumberable<T> collection.
so, when a button is pressed, it should be able to add the item into the collection on the ASP.NET site without having to do a full postback.
I have basically the following structure set up :
[Code]....
I am aware that a FileUpload requires a full page postback. I read the article http://www.4guysfromrolla.com/articles/090209-1.aspx[^]I tried to install a PostBackTrigger programmatically to get a full postback only on the ImageButton1 control. All other postbacks must be partial. (GridView sorting, paging, ...)In code behind I do :
[Code]....
The above code does not seem to install a full postback only for the ImageButton1, so the file upload fails. How can I make this work ?
I have a quite strange situation where I have the following code:
<asp:Timer ID="GameClock" runat="server" Interval="5000" Enabled="true"
ontick="GameClock_Tick">
</asp:Timer>
<asp:UpdatePanel ID="ItemsUpdatePanel" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="false">
<Triggers>
NOTE THE TRIGGER IS COMMENTED OUT
<%--<asp:AsyncPostBackTrigger ControlID="GameClock" EventName="Tick" />--%>
</Triggers>
<ContentTemplate>
<asp:ListView ID="PlayerItems" runat="server" GroupItemCount="7"
onitemdatabound="PlayerItems_ItemDataBound">
<LayoutTemplate>
<table border="1" cellpadding="2" cellspacing="0" runat="server" id="tblProducts">
<tr runat="server" id="groupPlaceholder">
</tr>
</table>
</LayoutTemplate>
<ItemTemplate>
<td id="Td1" runat="server" style="vertical-align:top; text-align:left; height:100%;">
<div>
<div id="category" runat="server">
<asp:Panel ID="ItemPanel" runat="server">
</asp:Panel>
</div>
</div>
</td>
</ItemTemplate>
<GroupTemplate>
<tr runat="server" id="productRow">
<td runat="server" id="itemPlaceholder"></td>
</tr>
</GroupTemplate>
</asp:ListView>
</ContentTemplate>
</asp:UpdatePanel>
This gives a quite strange result: Every 5s my whole page gives a full postback. When I comment in (activate) the asyncpostbacktrigger, the updatepanel does not give a full postback. In the PlayerItems_ItemDataBound I have the following code (which, I do think, do not matter):
protected void PlayerItems_ItemDataBound(object sender, ListViewItemEventArgs e)
{
if (e.Item.ItemType == ListViewItemType.DataItem)
{
ListViewDataItem dataItem = e.Item as ListViewDataItem;
if (dataItem != null)
{
BaseItem myItem = dataItem.DataItem as BaseItem;
Panel itemPanel = new Panel();
Literal firstLiteral = new Literal();
firstLiteral.Text += "<div id='smoothmenu1' class='ddsmoothmenu'>";
firstLiteral.Text += "<ul>";
firstLiteral.Text += "<li><img src='Images/Game/Items/" + myItem.ItemImageUrl + "' />";
firstLiteral.Text += "<ul>";
// Add all events bound to item into contextmenu
itemPanel.Controls.Add(firstLiteral);
foreach (Delegate del in myItem.Actions.Items)
{
Literal firstItLit = new Literal();
firstItLit.Text += "<li>";
itemPanel.Controls.Add(firstItLit);
MethodInfo methodInfo = del.Method;
string commandName = myItem.ItemId + "|" + methodInfo.Name;
LinkButton btn = new LinkButton();
btn.Text = methodInfo.Name;
btn.Click += new EventHandler(btn_Click);
btn.CommandName = commandName;
itemPanel.Controls.Add(btn);
Literal secondItLit = new Literal();
secondItLit.Text += "</li>";
itemPanel.Controls.Add(secondItLit);
}
Literal btnLiteral = new Literal();
btnLiteral.Text += "</ul>";
btnLiteral.Text += "</li>";
btnLiteral.Text += "</ul>";
btnLiteral.Text += "</div>";
itemPanel.Controls.Add(btnLiteral);
Panel panel = (Panel)(e.Item.FindControl("ItemPanel"));
panel.Controls.Add(itemPanel);
}
}
}
When I create a NEW updatepanel, ItemsUpdatePanel1, it does not fire a full postback without the timer. I can even start copying items from ItemsUpdatePanel to ItemsUpdatePanel1, and suddenly the full postbacks happen. I tried 2 seperate times, and they started happening at different times.
I have got the following gridview with a UpdatePanel and approve and save button in each row. How do I create a full postback if approve button is click and asyncPostback if save button is click.
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<Triggers>
<asp:PostBackTrigger ControlID="btnApprove" />
</Triggers>
<ContentTemplate>
<asp:GridView ID="gvApproval" runat="server" CssClass="gridview" BorderColor="#E5E5E5"
Width="98%" AutoGenerateColumns="False" DataKeyNames="NewProcessId" OnRowCommand="gvApproval_RowCommand"
OnRowDataBound="gvApproval_RowDataBound" OnRowEditing="gvApproval_RowEditing">
<Columns>
<asp:TemplateField Visible="False">
<ItemTemplate>
<asp:Label ID="lblApprovalId" runat="server" Text='<%# Bind("ApprovalId") %>' Width="1px"></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="Comment">
<ItemStyle Width="80%" Wrap="True" />
<ItemTemplate>
<asp:Label ID="lblComment" runat="server" Text='<%# Eval("Comment").ToString().Replace("
", "<br />") %>'></asp:Label>
<asp:TextBox ID="txtApprovalComment" runat="server" CssClass="textMessageBox" TextMode="MultiLine"
Width="98%" Visible="false"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvApprovalComment" runat="server" ControlToValidate="txtApprovalComment"
Display="Dynamic" CssClass="textErrorMessageNormal" ErrorMessage="Comment is required before approval"
ValidationGroup="Approve"></asp:RequiredFieldValidator><br />
<asp:ImageButton ID="btnApprove" runat="server" CssClass="spbutton" Visible="false"
ImageUrl="~/Images/ButtonApprove.gif" ValidationGroup="Approve" CommandName="Approve">
</asp:ImageButton>
<asp:ImageButton ID="btnSave" runat="server" CssClass="spbutton" Visible="false"
ImageUrl="~/Images/ButtonSave.gif" ValidationGroup="Save" CommandName="Save">
</asp:ImageButton>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<PagerStyle CssClass="pager" />
<HeaderStyle CssClass="gridtableHeading" Wrap="False" />
<AlternatingRowStyle CssClass="alternateRow" />
</asp:GridView>
</ContentTemplate>
</asp:UpdatePanel>
