Invoking Code Both Before And After WebControl.Render Method?
Apr 16, 2010
I have a set of custom ASP.NET server controls, most of which derive from CompositeControl. I want to implement a uniform look for "required" fields across all control types by wrapping each control in a specific piece of HTML/CSS markup. For example:
<div class="requiredInputContainer">
...custom control markup...
</div>
I'd love to abstract this behavior in such a way as to avoid having to do something ugly like this in every custom control, present and future:
public class MyServerControl : TextBox, IRequirableField {
public IRequirableField.IsRequired {get;set;}
protected override void Render(HtmlTextWriter writer){
RequiredFieldHelper.RenderBeginTag(this, writer)
//render custom control markup
RequiredFieldHelper.RenderEndTag(this, writer).....
If I was deriving all of my custom controls from the same base class, I could conceivably use Template Method to enforce the before/after behavior;but I have several base classes and I'd rather not end up with really a convoluted class hierarchy anyway.
It feels like I should be able to design something more elegant (i.e. adheres to DRY and OCP) by leveraging the functional aspects of C#, but I'm drawing a blank.
If i've the button outside an update panel (basically i'm using RadAjaxPanel by Telerik) it is working fine. But when the button is inside an ajax panel, even if i click OK for deleting the records the server side code is not called.
I got XYZ page which got few divs inside of himin 1 of the divs there in an updatepaneland in another there are buttons which being inserted into the page using javascriptWhat I want to do is once a button is clicked, it would invoke a method using javascript in the server which would update the updatepanel
I am creating a custom control by inheriting a server control, say LinkButton. There are properties like "BorderColor" available in LinkButton. Let's say, I don't want this particular property to be available when I create an instance of the custom control.
I want to completely hide this particular property (I don't want to override it but disable it.)
I have created an android app, that registering to google c2dm service. And It's getting a registration_id token from c2dm services successfully. I already signed Android Cloud to Device Messaging form and I received confirmation email from c2dm service.Everything seems ok in client side, it's getting registration_id in simulator environment. So, it's ok. But, On server side, It's authenticating google service, it's receiving Auth code then it's invoking to c2dm send url with below code.
public void SendMessage(string registrationId, string data) { ServicePointManager.ServerCertificateValidationCallback += delegate(
I'm using the ReportViewer control on my .aspx page which displays a single report based on various user parameter selections. Dropdown2 is dependent on the DropDown1 selection (i.e. the user selects Unit A from DropDown1 and that results in 10 selections under Dropdown2, or the user selects Unit B from DropDown1 and that results in 15 selections under DropDown2, and so on). The user makes the selections, clicks the "Run Report" button, and the report displays as expected. The user then can export to Excel or PDF
I've received a request to allow users to run the report for all possible selections and export to their desired format rather than having to run the report for each separate DropDown1 and DropDown2 selection. So in other words, they don't even want to see the report on the screen, they just want to be able to click a button that runs the report for all possible parameter selections and export it to a single Excel or PDF document.
I have extended a gridview to add an additional header with following two hyperlink controls "Select All" and "Clear All". These will operate on checkboxes in the data rows of the grid. I hide the column headers as I only want to show one column with checkboxes and "Select/Clear All" links. Everything is working as expected. Now, I wanted to add a scrollbar to my grid control, I did add the scroll bar using div but what it does is, it includes the "Select All and Clear All" links aswell. I only need to add the scrollbar to datarows and not to the header.I am trying to extend my control to include hte scrollbar by adding div during Render function. But how will I determine or loop through header rows? How will i get the header row with hyperlinks that I created above?? In Render if I do this.HeaderRow, it gets the original column header and not the custom header.
I want execute below callback() method after completion of document.getElementById('btnDownload').click(); method . Now callback()executing immediatly. I want wait "Click()" process done then Execute callback(); method.
function LoadPopup() { // find the popup behavior this._popup = $find('mdlPopup'); // show the popup this._popup.show(); // synchronously run the server side validation ... document.getElementById('btnDownload').click(); callback(); } function callback() { this._popup = $find('mdlPopup'); // hide the popup this._popup.hide(); alert("hi"); }
I have an application that renders HTML code to allow users to preview an email that the app sends out. The HTML is held in a string that is then put into the text property of a label. This is working fine, but now I need to also add XML to the HTML string for an email listener when the user clicks the Send button. The problem is that the XML tags are being ignored by the browser.
[System.Web.Services.WebMethod] public static string GetStateData(string state) { //this is where i want to call a javascript method "GetItems" }
I have a javascript method that retrieves some values for me and I want to get use one of those values in my web method
function GetItems() { var variable1= $("#<%=Item1.ClientID %> input:checked"); var variable2= $("#<%=Item2.ClientID %>").val(); return [variable1.text(), variable2.val(), variable2];}
I've searched for ways to call the javascript method from the web method but every time my search results in how to call a web method from javascript.
I did find this but it was done from the code-behind of a silverlight project and when I tried adding the correct reference to my code-behind it wasn't there
var result = HtmlPage.Window.Invoke("GetItems"); Is there a reference I'm missing?
I need to do stuff after my page is rendered in the browser. In detail, i need to send email/sms and other non-browser related stuff, but the operation takes time, and i dont want my visitors waiting 5-8s for the success message.I have tried putting the "After Rendering Code" in the page Unload event. That seems to work - but only on localhost. It does not work on our production server.So i figgured, maybe this is some IIS setting? I've also read that it's up to the browser, if it will show th epage after rendering is complete - or wait for the whole package to end.So i tried to end the package with Response.end before my "A-R-C", but that just killed it.
I am creating a custom control and was wondering if it is possible to render any JavaScript in the head tags of the page it is placed on? I am thinking I would need to use the FindControl method, but am not sure what I need to bind to. I am thinking the page object? Let me know if I am thinking in the right direction or if there is another option.
My only concern with the above mentioned idea is that how do I render all my content while placing some code in the head tags?
We have some reports that are loaded on a asp.net webpage via the localreport.render() and a request has come in to hide a logo image if it is displayed inline as html on the page and only show the image if it's rendered as a pdf.
is there any way to determine the render mode in the report so i can create an expression to set the display property to hidden for the logo image if it's not pdf mode?
I've been watching a video on Scott Hanselmnn teaching MVC 2 tricks/tips. He mentions how MVC 2 by default uses ASP.NET Web Forms view engine to render the output of the views; he mentions that the web forms view engine is a little slower than it could be for MVC 2 since it generates a control tree and then outputs the HTML to the page (I hope I said that right).
I was wondering what he meant by web forms generating a code tree before outputting the HTML to the page. Does anyone have insight on the view engine of Web forms and the steps of the rendering process works for ASP.NET and MVC2?
I added the extender and when i tried to add the method this message poped up; Cannot create page method "GetCompletionList" because no Code Behind or codefile was found.
I am just learning ASP.Net and i am more using C# as code behind than vb.I am trying to call a method of the code behind (file.aspx.cs) from the (file.aspx).I know how to do it the easy way:- create a button from ASP.Net and double click on it than the property "onclick" will be linked to the method.But i don't know how to do it from a query:
- By example, from an Access database,i use the syste, [using System.Data.OleDb;] and i made a query and display it into a standar object named "Table" which has rows (tablerow) and cells (tablecell) and the cells have one of their properties which is "Controls" where developers can add button (regular button, image button, link button, etc). With i display the buttons from the database, i can not call a method from code behind! I can't either use their properties "onclick" to call i method i created in the code behind.Is there a way to do it ?
How to invoking java web service(WSDL) with c# client (web application).Java web service methods is proxy.object will be created in client C#.Then how to call that proxy method in c# client? how to test that java web service in c# client side?
I have to call the function, when exception occured. Is it possible to call the function in Catch block (Try-Catch)? I have tried it but the function did not get invoked. What i have to do for it? Shall we unable to call the functions in Catch block? I have shown my code below.
Try
Catch ex As Exception ErrorHandlers.LogErrorDetails(ex, Session("UserId").ToString, "") Throw ex End Try.
I knew, We can invoke this function in Finally block but i do not need as per my requirements.
I'm working on a web page that will be viewed on a blackberry (to start with). On the page I need to be able to add calendar events to the user's blackberry calendar or add new contact records to their contact list.
I've found the api on RIM's site that would allow this [URL] but I have no how to incorporate it into an asp.net page.
I assume I need to write inline javascript but I don't know how to import/include the API libraries that are required. Does anyone know how to do this or, better yet, have some sample code? If this is even possible, I think I just need to get past this hurdle and I'll be on my way (until I trip over the next one ).
In an ASP.Net application I am creating a Compiled Assembly Instance during Application Start. Then I want to invoke the methods as a user interacts with the controls on the Web Page. Currently I can invoke a method when i create the assembly during start up. however after wards the assembly is lost.
I am currently storing it at the Application Level as an object. I do the same thing in a windows app this all works fine. In ASP.Net it does not.
