I have an ImageControl inside an UpdatePanel. The image changes upon a Treeview located outside of theUpdatePanel. Im using the treeview _SelectedNodeChanged in the UpdatePanel Trigger. When I run the Web Application I get an Error theMasterPage could not find the Treeview for the Trigger.
[Code]....
am using asp .net 3.5 web forms with VB.I have a masterpage that is populating a treeview from a sql db. When a user clicks on the name in the tree it passes the employee identifier (employee number) to a label on the master page i have hidden. FROM the CONTENT page i am reading the label on the master page and updating the label on the content page to match the label on the master page so i can use the emp number to display info. At least that what i want. However, the content page is not posting back when the label updates of course and its one clikc behind becuase there is no post back. Is there a way to make the page postback when a label changes or a textbox for that matter.Here is how i am updating the label control On the mastepage :
Public Property EmpCode() As [String]
Get
Return Label360.Text
[code]...
I have dynamically built my treeview by reading hierarchical data from database, I have divided my MasterPage like so:
<table width="100%">
<tr>
<td style="width:20%">
<asp:TreeView ID="root" Visible="true" runat="server" RootNodeStyle-ForeColor="BlueViolet">
</asp:TreeView>
</td>
<td>
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server"></asp:ContentPlaceHolder>
</td>
</tr>
</table>
When I click on one of my treenode, I need to set the node.target to the "ContentPlaceHolder1", ie, keep the tree menu as still and let the content page displayed at the right part of the page. However, the node doesn't seem to recognize the ContentPlaceHolder1.
2. I have tried using <frameset> with 2<frame> pages, this way, the node.target can recognize the frame id, code as below:
<frameset cols="25%, *">
<frame src="menu.aspx" name="Menu"></frame>
<frame src="Main.aspx" name="Content"></frame>
</frameset>
But, I need to check user's login permission, I did it with session("userId") variable and I ran into a problem that the session will only exists on the left frame(menu.aspx), not the content page(Main.aspx). I have tried both methods, but one way or the other, there is some function that I cannot accomplish.
Periodically a rash of occurrences of the following error happen. I believe they're the result of hack attempts. Whether that's the case or not, my question is how can I handle the error? I want to avoid unhandled exceptions. The TreeView control is just
a standard .Net TreeView control, not a custom one. If you suggest a code solution, please code it in VB.Net as that's what I'm using.
Message: Input string was not in a correct format.
Stack Trace:
at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
at System.Web.UI.WebControls.TreeView.LoadPostData(String postDataKey, NameValueCollection postCollection)
at System.Web.UI.WebControls.TreeView.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection)
at System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad)
at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
I have an asp:TreeView in my MasterPage, which is loaded on demand from a database using some custom functions to fill the Tree. My tree will only ever be 4 levels deep (root -> 1st sublevel -> 2nd sublevel -> leaf nodes) What I want to achieve is preserving the expand/collapse state of this TreeView while navigating between different aspx pages, that all share the MasterPage holding my TreeView. I have been using the methods described in these resources:
[URL]
but I am still not getting the results I want... My TreeView markup in the MasterPage looks like this:
[Code]....
I am using a custom class to save and retrieve the state of the TreeView, the code is pasted below:
[Code]....
In my Page_Load on MasterPage I have:
[Code]....
where Reload() makes sure I'm loading the TreeView for the correct argument (based on a user selection)
And in TreeView_Unload I have:
[Code]....
With all this in place, my TreeView is behaving almost as I want it.. I can expand the root node, it will be populated and I can browse to a new content page and have the same treeview appear in the MasterPage (with same expanded root)... BUT if I try to expand any of the 1st sublevel nodes, I end up with a completely collapsed treeview instead. After some debugging I have come to the conclusion that the "NodeExpanded" event gets the ROOT NODE as event argument instead of the 1st sublevel node that I clicked. When the user changes the option that makes the TreeView re-populate with new data, I simply do a "HttpContext.Current.Session("TreeViewState") = Nothing" to reset my saved state.
If you need more info / code snippets, let me know and I will post it.. But I felt there was no reason to post my complete source, as I have multiple files with about 500 lines of code each (there's a lot happening on the MasterPage, other than the TreeView)
I have an UpdatePanel on the page which I'd like to trigger using javascript.First of all my code perfectly works if it's in a website not being inheriting from a masterpage. Now when you put exactly the same code into a website which inherits from a masterpage, the UpdatePanel wouldn't get fired anymore.
Here's the code (.aspx) [Code]....
Here's the code (.cs) [Code]....
Work on Asp.net VS08. In my master page i need to fill a treeview form database.I done it,i set the NavigationUrl value. When user click a leaf, then they see there wanted page. But then the MasterPage tree become expanded on root. I want the tree will not expanded and tree will the same as before click on leaf.
View 1 RepliesI have a FreeTextBox control on a page that has a masterpage. This FreeTextBox control is in the maincontent.
View 5 RepliesI´m having a little trouble finding a radiobutton on a nested masterpage.
I tried this code.
//Principal principal = (Principal)this.Page.Master;
I have a 2 textbox and a checkbox in a Login View on my Master Page, have trouble making a FindControl that works.
View 8 RepliesI have threee dropdownlist's which are varchar in master page and one dropdownlist in current page which is of int datatype. At present in current page I'm using LIKE '%' for all dropdownlist's. I need to pass dropdownlist vlaues as parameter to sql.Â
View 1 RepliesIn a project I'm working on, the master page codebehind does a load of complex checks and confirmations that decide the navigation list displayed on the TreeView of the page. Now, I need a way to access this list from another front-end page, such as "frontpage.aspx".
This serves two purposes. One, the masterpage will hide pages on the navigation list the user shouldn't have access to, but the user can still enter the page by typing the page name into the URL manually. By being able to browse through the TreeView, I can isolate the whole authorization into a single method by simply checking if the page name exists within the currently used TreeView.
Two, this will allow me to easily change the displayed content of any page without checking the database or storing sessions for whatever specific rights the current user has, as I can just look if the TreeView contains "Products Admin" for example, and then use that to hide or display the section of the page that has to do with "Product Admin" functionality.
Can anyone point me to where i can find a documentation about css, masterpage and derived pages in VS2008. I used them in VS2005 but it looks like it's almost impossible on VS2008. or it's just me.
View 4 RepliesI have a Button on a Masterpage, when that button is clicked I want to find a control on a FormView that's not on the Masterpage.
I tried the followingcode:
[Code]....
and also:
[Code]....
The only thing that is found is the FormView but not the Labelcontrol.
How to do that?
code for FindControlRecursive =
[Code]....
I have a button is inside a another table(s) inside the update panel.
<Update panel>
<ContentTemplate>
<table>
<table>
<Button>
<table>
<table>
</ContentTemplate>
</Update panel>
I would like to add a button to Update panel's trigger. But am getting an err says "Update panel can not find the button which trigger it".
I am getting "Sys.Webforms.PageRequestmanagerParseErrorException: This message recieved from manager could not be parsed. Common cause for this error are when response is modified by response.write"
I have an app that uses masterpages. On the masterPages I have a TreeView. I would like to only refresh the ContentPlaceHolder & not the Entire masterPage when a link is clicked on the treeView.
I have placed the contentplaceholder in an Updatepanel. I would like to if possible avoid including the menu in the update panel.
Using
VS2008 C#
AJAX Control toolkit Version 3.0.30512.20315
I've got a page with two ContentPlaceHolders. In first there is UpdatePanel with GridView. In second I located DropDownList which is trigger for UpdatePanel.
<asp:UpdatePanel ID="stanUpdatePanel" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="true" >
<ContentTemplate>
GridView & other stuff
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="ATDropDownList"
EventName="SelectedIndexChanged" />
</Triggers>
</asp:UpdatePanel>
Running the page causes error: "Control with ID 'ATDropDownList" could not be found for the trigger in UpdatePanel". I thought it was because the ATDropDownList is located inside ContentPlaceHolder. So I changed ATDropDownList's ID to UniqueID as follow:
<asp:AsyncPostBackTrigger ControlID="ctl00$ContentPlaceHolder2$ATDropDownList" (...)>
Everything works good, but I want to change it from page's code-behind. I tried to put
[Code]....
somewhere in code, but without luck so far.
How to find Masterpage offsetheight and offsetwidth using javascript ?
View 1 RepliesIm using treeview in asp.net
how can i check if parent contains childnodes in treeview selected node changed event.
I need to retrieve a specific node from the TreeView in order to dynamically set it's NavigateUrl property. I've tried using the code below:
TreeNode homeLink = TreeView1.FindNode("Home");
However this returns System.NullReferenceException error.My guess is that I'm using a wrong valuePath in the FindNode("Home"); function. I assume that valuePath refers to the "title" property of the node in the SiteMap?ere is an extract from the sitemap:
<?xml version="1.0" encoding="utf-8" ?>
<siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" >
<siteMapNode url="" title="" description="" SelectAction="Expand" roles="*">
[code]...
How to find the parent of an ASP.NET TreeView node in JavaScript?
View 1 RepliesDim begin As String = Convert.ToString(Master.FindControl("txtBegindatum"))
Dim eind As String = Convert.ToString(Master.FindControl("txtEinddatum"))
txtStart.Text = begin
txtEind.Text = eind
I try to get an value out of my masterpage but when I try this I get:
System.Web.UI.WebControls.TextBox in txtStart and txtEind
i got label on page to show errori got button called "click"if i put click using in Trigger insdie updatepanllet say
<asp.... : controlID="button" event="click">
if error, doesnt show on page,if i dont put in trigger, it show error on page.. wat wrong?
I have a Asp:modal (AJAX) that works fine on a master.page
When i then add an asp:menu with sitemapdatasource, then the page works fine first time at page load, but if i then click the btn that trigger the asp:modal i get this error
[URL] ....
What I want is that the user can write an email in a textbox on the masterpage and then hit a btn, if the email is valid 100% the event is trigged and the asp:modal is showed, its works fine when i dont have a asp:menu on the masterpage, but when i then add the menu, then the pages works, but when i will trigger the asp:modal then i get the error.
I'm accessing a Masterpage property from a regular page by doing the following:
[Code]....
I get the following error message:
Compiler Error Message: CS0246: The type or namespace name 'SecondMasterPage' could not be found (are you missing a using directive or an assembly reference?)
My base class file is a file called BaseClass.cs in my App_Code directory. Other functions in there work without errors. Why?