Panel Populated By Xslt Transform - Can't Access Controls Values In Postback
Sep 22, 2014
I have a page with an panel on it that can contain a number of editable controls (textboxes, date pickers etc). This panel (and the controls) are populated dynamicaly by loading up an XSLT tranformation and applying it to an XML document (which represents the entity being edited) in the Pages Load event if !isPostBack.
Once the user has made changes they click a button and the form posts back. At that point I want to be able to go through the various controls in the panel, get the updated values and persist them back to a database. When I try to access the controls in the underlying buttons even theyre not there the panel is empty.
What I think is happening is that the page is being recreated at the start of the post back. When its recreated the XSLT transformation doesnt run because its a postback so the edit panel never gets repopulated. The controls therefore dont exist as far as my Button handler is concerned and it cant access their values.
My stopgap solution to this is that Im not checking isPostBack before repopulating the panel, so now the panel gets repopulated in the post back, the controls are there and Im able to query their values. The problem is that this involves another round trip to the database server to pick up the xslt and thats undesirable.So, first of all, have I understood the problem correctly?
I could save the trip to the db by storing the xslt (probably in the view state) but the whole idea of having to load up the control before checking its values feels sort of wrong and Im concerned that Im doing the wrong thing without realising. When I repopulate the control I am, of course, applying the XSLT to the XML document as it stood before the user made any edits. I would have expected querying the value of a control to return me the value before the user changes, but it actually seems to return me the value of the control as it was in the page when the user clicked the button. How can that be?
I have a form with 2 sections. The first one contains some radio buttons. The second one contains a checkboxlist. When we change the selected radio button then it modifies the elements in the checkboxlist. For this I setted the radio buttons with autopostback, and in the code behind (in OnLoad) I populate the CheckBoxList depending on the selected radio button.
This work fine.
The problem is that I also have a button at the end of my form which post the data of my form in another page (with PostBackUrl). Then in that page I would like to retrieve the values of the checked checkbox. But I can't find how to do that. In the Request.Form I don't see anything.
I searched on the web but I didn't found really a solution.
XElement Categories = new XElement("Promotions", from b in db.GetPromotions() select new XElement("Promotion", new XElement ("Category",b.CategoryName), new XElement("Client",b.ClientName), new XElement("ID",b.ID), new XElement("Title",b.Title))); XDocument mydoc = new XDocument(); mydoc.Add(Categories); try { // Load the style sheet. XslTransform xslt = new XslTransform(); xslt.Load(@"C:WebDesktopModulesPromotionsTransList.xslt"); // Execute the transform and output the results to a writer. StringWriter sw = new StringWriter(); //XsltSettings mysettings = new XsltSettings(); XmlWriterSettings mysettings = new XmlWriterSettings(); xslt.Transform(mydoc.CreateReader(),null, sw); String mstring = sw.ToString(); It generates the following string: <ul id="red" class="treeview-red" xmlns:asp="http://schemas.microsoft.com/ASPNET/20"> <li><span>Arts & Entertainment</span><ul> <li><span>Client 1</span><ul> <li><span><asp:LinkButton ID="LinkButton2" runat="server" OnClick="LinkClicked" Text="Get your Free 2" /></span></li> <li><span><asp:LinkButton ID="LinkButton4" runat="server" OnClick="LinkClicked" Text="Get your Free 4" /></span></li> <li><span><asp:LinkButton ID="LinkButton5" runat="server" OnClick="LinkClicked" Text="Get your Free 5" /></span></li> </ul> </li> </ul> </li> <li><span>Community & Neighborhood</span><ul> <li><span>Client 2</span><ul> <li><span><asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkClicked" Text="Get your Free 1" /></span></li> </ul> </li> </ul> </li> <li><span>Education</span><ul> <li><span>Client 3</span><ul> <li><span><asp:LinkButton ID="LinkButton3" runat="server" OnClick="LinkClicked" Text="Get Your Free 3" /></span></li> </ul> </li> </ul> </li> <li><span>Home & Garden</span><ul> <li><span>Client 4</span><ul> <li><span><asp:LinkButton ID="LinkButton6" runat="server" OnClick="LinkClicked" Text="Get your Free 6" /></span></li> </ul> </li> </ul> </li> </ul>
Now I take the string and add it to a panel which is part of a view in a multiview control: Panel1.Controls.Add(new LiteralControl(mstring)); I have tried to play with Page.ParseControl, but I cannot get it to work right in the panel, the linkbuttons do not show, even though the text is there in the source. Now I tried this: Control myctrl = Page.ParseControl(mstring); Panel1.Controls.Add(myctrl); and I get this as the one of the controls:
a id="dnn_ctr954_ViewPromotions_LinkButton2" href="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("dnn$ctr954$ViewPromotions$LinkButton2", "", true, "", "", false, true))">Get your Free 2</a>
It doesn't work the way expected, dotnetnuke is doing some nutty stuff here using the parse control. it seems to drop my LinkClicked event.
I'm new with ajax control. I have a Gridview in which there're two columns: a text box and a hyperlink. When hyperlink is clicked, a modalpopup will show up. Inside the modalpopup panel, there're a checkboxlist, ok button and cancel button. When Ok button is clicked, I'd like to post back the list of items that's checked to the corresponding gridview row. I'm trying to do the postback on the code behind with c#. My problem is I don't have a row index for me to know which row to postback.
m using a listview and an object data source in my application, with optimistic concurrency control.i have only 2 columns in the listview: category_ID and category_name;when i try to delete an item, an error message is generated saying that one of the old values populated by the list view is null, i performed debugging, and found that the category_ID old value is populated correctly, while the category_name old value is populated as nulli can't find a problem in the code, i executed the delete command in the query builder directly and it worked fine,
I would like to read the username and password values from the XSL and use them for authentication. I am using ASP.Net and C# to perform the actual transform on an XML file.
share code with me that would allow me to read the XSL variables from ASP.NET/C#.
We do have a search page for customers which returns a list of data from a table.
Once we select on an item it should redirect to another page with customerId as a querystring parameter..
Now the problem is we have to save all the customerIds and need to send them to display page..and need to select next one once they done with previous one without going to the search page again..
Example:
if they got 10 customers in the search page then we need to send all 10 ids to display page by starting display of firstone and once they select next button on display page they have to move on to the next cutomer from that list..if they reached the end of list they have to start again from the first...we need to avoid the user going to the search page for each customer every time...
Does anyone know if there is a way to "transform" specific sections of values instead of replacing the whole value or an attribute?
For example, I've got several appSettings entries that specify the Urls for different webservices. These entries are slightly different in the dev environment than the production environment. Some are less trivial than others
[code]....
I've looked through the available web.config Transforms but nothings seems to be geared towars what I am trying to accomplish.
I have a somewhat complex model that I need to pass to a MVC 2 Create view so its properties can be filled out. I'm not sure how to actually create this model as it has some relationship data that must also be filled out during the creation process.My main model is a Game. Most of its properties are scalar. It contains a foreign key to Content, for the game reviews, and there's a many-to-many relationship between Games and Platforms - games can be on a variety of platforms (PS3, XBox 360, etc.), and each platform has a library of games.When I pass data to my Edit view, it's as simple as:
[Code]....
I'm unsure what to do in the case of Create as I'm not sure how to link the associated parts - Content and Platforms - to a Game object.
When an asynchronous postback happened inside update panel, another postback happens also for MasterPagenot only update panel embedded page .I want to prevent this MasterPage postback . is this possible ?think like i have a MasterPage and another page which is test.aspx which is content page of MasterPagei have update panel at test.aspxwhen asynchronous postback happens at this test.aspx update panel it also loads MasterPage Page_Loadi want to prevent this (it should not also load MasterPage Page_Load)
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.
This is my table ... I am retriving the values of "FROM" and "TO" based on the id .. Separate Dropdownlist for FROM & TO . While Displaying , in "TO" Dropdownlist NY value is repeated twice .. How to remove the duplicate value? need vb coding frnz ...
i have a checklistbox that is databound during Page_Init in an
If (!Page.IsPostBack)
block. the user can then check off certain values, and click an asp.net button which posts back the form and renders a crystal report on the same page.
i need to be able to determine which items were checked in the control so that they can be used as parameters in the crystal report. rendering must be done during Page_Init.
the checklistbox object is on the page during design time; only the items are dynamic.
i tried using the Request.Form object during Page_Init to obtain the checkboxlist's items but either i didn't code it correctly or it can't be done that way...
can the checkboxlist items' values be obtained during Page_Init, and if so, how?
I have put several buttons and panels in my update panel. I also have a script manager on that page. now when I click on any of the buttons then the functionality is working fine but problem is that the complete page gets reloaded witha a flick, instead of updating the update panel only. I have set the "children as trigger" property of update panel "true".
Gridview binding data from database without doing postback on the select of item in dropdown.i know it is possible through ajax update panel but for some specific reason it can't use it.And i think that gridview is a server-side control and if i implement it by using table structure , jquery ajax and web service then it will loose all gridview properties of edit, update and paging etc.
I've got a data table with columns in which include Item, Category and Value (and others, but those are the only relevant ones for this problem) that I access via LINQ in a C# ASP.Net MVC app. I want to transform these into a matrix and output that as a CSV file to pull into Excel as matrix with the items down the side, the categories across the top and the values in the row cells. However, I don't know how many, or what, categories there will be in this table, nor will there always be a record for each item/category combination.
I've written this by looping round, getting my "master category" list, then looking again for each item, filling in either blank or Value, depending on whether the item/category record exists, but as there are currently 27000 records in the table, this isn't as fast as I'd like. Is there a slicker and faster way I can do this, maybe via LINQ (firing into a quicker SQL statement so the DB server can do the leg-work), or will any method essentially come back to what I am doing?
I want to transfer data from datatable to a gridview with a hyperlink column. But dont know how to do.
I attach my code as below, what i want to do is to output 2 columns in gridview, and the first column should be a hyperlink. However, now the first column still shows nothing.
