C# - How To Create New Instance Of A Page And Obtain URL
Aug 6, 2010
i'm a beginner web programmer. I've been coding desktop applications primarily. Right now, i have created this web app, in Silverlight, that uses a web service of my own for querying the database. The thing is, one of the app functionalities is the ability to open PDF files. I know that silverlight won't let you do this, but using an IFrame on top of the silverlight application you are able to display a page with de pdf file (using acrobat plug in). So here's the problem, my silverlight app passes the pdf path to the web service and, in return, the web service would create a new Page and pass the new page URI back so that it can be displayed on the IFrame:
i want to use a Datalist to list products from sqldatasource. When i select the Product i would like to retrieve the associate Product value in the code behind page so that i may use it to display data in Grid.
As some may be aware, I recently posted about high memory usage on my website and I have an idea that my thumbnailer may have something to do with this as I am not actively disposing of the instance when it has been used due to my misunderstanding how it works.
I am now looking at my code for the thumbnailer and would like some advice on when something would actually need disposing of, is it ONLY when you create a new instance of an object?
A instance of a class is created in the partial class of an aspx page.Under page_load or button click method I'm trying to set the value to the class. but when each postback takes place new instance is created and I'm losing the previous value.
public partial class DatabaseSelection : System.Web.UI.Page { DBProperties dbpro; Metadata obmeta; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { dbpro = new DBProperties(); }
Does anyone have a recommendation how this is archievable? I am trying to pass in the Type to the method and then create an instace of it and then access the properties in it.
I am trying to create instance of class by using reflection in ASP.net web site. Class ClassName is defined and located in App_code folder. Following line returns null, what could be wrong.
Type type = Type.GetType("NameSpace.ClassName", false, true);
I have a UserControl that I need to add dynamically. I tried to follow this MSDN article, but I'm not having any success....[URL]
The UserControl is basically an image gallery, and it loads some pictures based on an ID. My idea was to make this ID available as a property. Then when I create an instance of the control, I could set this ID and add it to the form.
I added a reference to the control in the .aspx page that will use it, like this:
<%@ Reference Control="~/PictureGallery.ascx" %>
And in the UserControl I added a ClassName like this:
<%@ Control Language="C#" AutoEventWireup="true" CodeFile="PictureGallery.ascx.cs" Inherits="PictureGallery" ClassName="PictureGallery" %>
When I try to create an instance in the .aspx.cs like the article suggests, Dim gallery As ASP.PictureGallery, I get an "Type ASP.PictureGallery is not defined".
The article mentions a namespace, ASP, and I tried importing it to the .aspx.cs with no luck. So, I'm not able to get a reference to the UserControl.
In my controller method, I'm trying to create an instance of a View (cshtml file) before I wrap it around an ActionResult and return it.Since there is no "class" for Razor Views to speak off, how does one go about creating an instance of a Razor View?
How can I create an instance of a web control at runtime using reflection? I created a series of controls that implement a common interface and I would like to create these controls based on the name of the control which is stored in my database.
I have attempted (and failed) to create an instance of these controls using Activator.CreateInstance in the following ways:
I have a function that at the moment takes a Type variable. This function sticks it in a list and such and eventually needs will create a class of that type. Right now I do that with
which is pretty hacky and also will not work in medium trust due to reflection(I think). Is there a better way of doing this without reflection? The Type is defined this way as part of a function. I need the class to be created "lazily" because it may not be created in the application if it's not needed. I use it for example like
AddToList(typeof(Whatever));
Note, I'm open to suggestions on changing the function calling. I just need the object to be created lazily and for to store the type(or however to create an object of the type) in a list.
I want to create multiinstance application in Azure. and then demontrate that if one of the instance is down other instance is working fine. How should I achive that.
I'm trying to use MS IME on a server to retrieve some Japanese info in a silverlight app. The app accesses to the server by using WCF, but when calling a CoCreateInstance to create a IFELanguage2, it gives me -2147467262. The same code I'm using on the server actually works pretty fine on a WPF app.
Here is the code,
// ...omit Guid imeGuid; int errCode = Ole32.CLSIDFromString("MSIME.Japan", out imeGuid); WinBase.CheckError(errCode); Guid feLangIID = new Guid(Constants.IID_IFELanguage2); IntPtr ppv; errCode = Ole32.CoCreateInstance(imeGuid, IntPtr.Zero, Ole32.CLSCTX.CLSCTX_ALL, feLangIID, out ppv); WinBase.CheckError(errCode); // errCode is 2147467262 IFELanguage IfeLanguage = Marshal.GetTypedObjectForIUnknown(ppv, typeof(IFELanguage)) as IFELanguage; errCode = IfeLanguage.Open(); WinBase.CheckError(errCode); // ...omit
Do I need to setup anything to use the MS IME on a server side? I'm running the app on the following environment, IIS7 .NET Framework 4.0 Windows 7 pro 64 bit VS2010
I have a text box on page load, loads a text value. I would like on the first instance of the page load for another textbox to equal to this value. As I have a gridview on the same page to update the textbox value does not get updated.
Essentially, if provide me with a VB script to obtain the value of the textbox on page load to pass to another textbox default value only on the same page.
I am trying to create an instance of System.Web.HttpResponse to send the uers to another website.I am doing some other stuff in my vb.net that does not let me use the regular Response.Redirect.when I do Dim myRsp As System.Web.HttpResponse = New System.Web.HttpResponseit complains about a textwriter.
In my GridView I use FindControl/<FooterTemplate> with a TextBox that you can enter an integer with a comma
into the TextBox, because I create an instance of the Textbox first and then remove the comma out of the integer before the TextBox is used to update the table in the database.
However once the data is in the table and displayed in the GridView if you try to change the integer and use a comma in the GridView you cannot because FindControl/<EditItemTemplate> will not create an instance for you to remove the comma from the integer before it updates the table because FindControl/<EditItemTemplate> doesn't allow you to create an instance of the TextBox first, instead when you try to use the instance that looks like was created it gives an error stating:
Object reference not set to an instance of an object.
So the question is:
HOw do you create an instance of a TextBox in a GridView when using FindControl/<EditItemTemplate>?
vs asp2008 instance cant recognize the sqlExpress 2008 instance on my machine
I have wonder if you could try to help me with the fallowing issue:When trying to add a new sql server connection (local or remount) from VS(visual studio) 2008 express - on the add connection dialog
box: server name: are Empty!! The vs couldn't point to any database, like dont recognize the sqlExpress 2008 instance i got on my machine.
1. Have tried to "play" with sa property's(from sqlS: Databases: security: login tree folder) and with the sql
s windows service: stop and restart 2. And so with the target db. 3.
On the services.msc The sql server express the status is started. The sql server agent status is disabled and don't have the option to start. The sql server explorer status is disabled and don't have the option to start.
I have a datamodel with a couple of tables. One of my tables have about 40 fields (I know that is a lot, but we have to keep the structure in place as we are upgrading a classic ASP project to MVC). Some of my Actions only updates 1 or 2 fields in my table.
Is there a way to create Entities, for instance, that only contains the contact details of the client table, and not any other details, and then another entity that contains only the address details. I don't want to submit the entire row when I only update telephone details, or the client's picture.
There seem to be a few issues in the way Razor views are designed and the code generated
1. Descendants of WebViewPage are forced to override Execute() (since it is abstract) but that method is never called. Why? 2. The virtual method ConfigurePage is never called in descendants that override this method. 3. CreatePageFromVirtualPath is no longer virtual. This was the one method that gave us access to the Layout Page (Master Page) instance. Now we no longer have this access. Why was this done?
How can one get access to the instance of a Layout page?