Translating C# Delegate To VB.NET?
Nov 19, 2010
I am trying to translate or convert C# code that a friend gave me. I have limited C# knowledge but was going along OK until I hit the following code that includes a delegate. I cannot figure out how to get the equivalent functionality in VB.NET. I'm using
.NET 2.0 and VS2005.
public bool TryGetRedirectMatch(UrlContext url, out RedirectMatch match)
{
if (url.Path.StartsWith("/product.aspx", StringComparison.InvariantCultureIgnoreCase))[code]....
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Nov 11, 2010
I want to test this code found here. It allows me to auto-load content from server as the user scrolls down the scroll down. I am having difficulties trying to convert code to C#/ASP.NET. Primarily, I want this code to be translated to C#/ASP.NET:
package com.vraa.demo;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class InfinitContentServlet extends HttpServlet {
private static Integer counter = 1;
protected void processRequest(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
try {
String resp = "";
for (int i = 1; i <= 10; i++) {
resp += "<p><span>"
+ counter++
+ "</span> This is the dynamic content served freshly from server</p>";
}
out.write(resp);
} finally {
out.close();
}
}
@Override
protected void doGet(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
}
@Override
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
processRequest(request, response);
}
}
In addition, I would like to know if I have to make any changes to this JavaScript code:
<script type="text/javascript">
$(document).ready(function(){
$contentLoadTriggered = false;
$("#content-box").scroll(function(){
if($("#content-box").scrollTop() >= ($("#content-wrapper").height() - $("#content-box").height()) && $contentLoadTriggered == false)
{
$contentLoadTriggered = true;
$.get("infinitContentServlet", function(data){
$("#content-wrapper").append(data);
$contentLoadTriggered = false;
});
}
});
});
</script>
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Dec 1, 2010
I am hosting a php application on my virtual Windows server running IIS.
The person who wrote the php website for me asked me to put this piece of codes in a .htaccess:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
But as this application is running on IIS, I need to translate this piece of codes to web.config. So could any one have experience about this, translate them into web.config?
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May 31, 2010
I am following this tutorial and I am having trouble translating the following code to C# (there is no "Item" method in C#):
tempRow.Item("imgFile") = ("imgGrab.aspx?id=" & tempRow.Item("imgID"))
(tempRow is a DataRow)
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Sep 8, 2010
I need to convert this line of code from an asp.net c# page to asp.net IronPython, how would it be?
((IPostBackEventHandler)Button1).RaisePostBackEvent(null);
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Feb 18, 2010
I'm using resx files to localize my asp.net 2.0 application. As it's freeware I need the help of many users translating it for free. I don't want to use automatic translation as there are my special terms which need to be translated exactly.Is there somewhere an online tool where resx-files could be translated? My users might have different operating systems, so having an online tool would be the best to find new users translating the pages.
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Oct 28, 2010
I have the following function that translates the header row in a gridview:
[Code]....
When I added sorting to the gridview cell.Text does not work anymore. How can I access the header text in the cell?
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Mar 12, 2010
I am working with .net 3.5 and making application in asp.net. I show some application which is make in C# in Windows form where i see following code in class level declaration
[Code]....
and following code in form load
[Code]....
and following code in some event
[Code]....
Now my problem is I am making application in asp.net code behind VB.net where I cannot how to apply all this in my application. I more confuse with Delegate and BeginInvoke. I read somewhere that to use BeginInvoke in VB you should use Ajax.
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Dec 14, 2010
In my code behind on a button click event I want to set the text of a label to inform the user where in the process we are. How do I create a delegate to allow the label to get updated
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Jun 28, 2010
I am using ASP .NET and C#, and using the code-behind-pages concept.I am trying to implement a business delegate pattern in ASP .NET to reduce coupling between the presentation and business tiers.I want to have several ASP pages send information (through asp buttons clicks) to a "business delegate" ASP page, which will in turn send the necessary information to a C# method.The problem is that each button_click event in ASP .NET is directly tied to a C# method. I am having trouble understanding how to separate the presentation and business logic because of that.
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Sep 2, 2010
I am trying to get this to bind to a gridview, without any luck. I would like each asynctask to ultimately return seperate datasets, but for now I can deal with the same one being returned.
[Code]....
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Feb 22, 2011
The following code works for webform view engine.
<% Model.Categories.ForEach(x => { %>
<li><a href="#">@x.Name</a></li>
<% }) %>
I wrote the above code as below in razor view:
@Model.Categories.ForEach(x => {
<li><a href="#">@x.Name</a></li>
})
But this doesn't work. Is there any way to achieve this in razor view?
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Jan 6, 2011
I am using c# and socket programming to create a web application. Anyone knows how to declare a useable delegate or using another method to invoke or call a method such that my codes will not have error? I am stuck for at least a week!
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Jan 27, 2011
<asp: GridView..... ID="MyGrid" AllowSorting = "True" OnSorting = "SortMyGrid">
protected void SortMyGrid(object sender, GridViewPageEventArgs e)
DataTable TheGridData = MyGrid.DataSource as DataTable;
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Aug 9, 2010
I am getting this error and can't figure out how to resolve it. CS0123: No overload for 'UserInfoDataSource_Selecting' matches delegate System.Web.UI.WebControls.ObjectDataSourceSelectingEventHandler'.
<Fields>
asp:BoundField
DataField="FirstName"
HeaderText="FirstName" SortExpression="FirstName"
<asp:BoundField
DataField="LastName"
HeaderText="LastName" SortExpression="LastName"
[code]...
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Oct 4, 2010
I created a control where other developers can create an instance and use. There is a button click in the control. How do I allow developers to plug in their own code in a certain part of my control? I am not sure if or how exactly to use a delegate or event in this scenario.
[code].....
How to I update MyControl to allow this?
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Jun 5, 2010
I need to pass a value from the selected button in user control to the containing page. I have it working fine but only by using a bunch of if statements that strike me as ugly. Can't figure out how to use a switch statement which, I think, would be a bit less cumbersome. I'd welcome on how to clean up this code (obviously I'm new to delegates).
Here's the code:
User Control:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="DelegateUserControl.ascx.cs"
Inherits="Foobar.UserControls.DelegateUserControl" %>
<asp:Button ID="Button1" runat="server" Text="Button 1" onclick="Button_Click" />
<asp:Button ID="Button2" runat="server" Text="Button 2" onclick="Button_Click" />
<asp:Button ID="Button3" runat="server" Text="Button 3" onclick="Button_Click" />
User Control code behind:
using System;
namespace Foobar.UserControls
{
public delegate void SendButtonValueToPage(int buttonValue);
public partial class DelegateUserControl : System.Web.UI.UserControl
{
public static event SendButtonValueToPage SendButtonIdToPage;
[Code]....
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Jan 14, 2011
I have a server control that performs some logic. I'd love to provide a default implementation of this logic in the code of the control, but allow a developer to pass an alternate implementation of this logic in as a delegate, if they wish.
So...
<prefix:MyControl FooLogicMethod="MyUtilityClass.MyFooLogicMethod" runat="server"/>
If they don't specify this, I'll use my default method. If they do specify it, I'll use the method they passed in.
Can I do this as a delegate, or do I need to reflect it?
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Dec 1, 2010
I have a web app where a user will visit a page with a QueryString parameter passing the ID of the object I should retrieve.
What I then need to do is run a number of checks to ensure the user can access that data, and also find out if another user has a lock (recorded in the DB) on that object.
Currently these searches are all performed sequentially, however I'm thinking the best option might be to use delegates to be able to fire off the three or four searches required at once then use the results as they are returned.
My implementation for this would be using a delegate(s) and calling BeginInvoke, however I'm worried the overhead of threading this may lead to no speed increases.
My research has indicated it will use the ThreadPool, so there shouldn't be too much overhead, but I'd like to know if anyone has implemented this kind of solution to a similar scenario on a high traffic site and seen good resutls from it?
The reason I'm looking to do this is we are reengineering our application from the ground up, and need to make sure we are building something that will scale considerably.
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Mar 2, 2011
I have got a query regarding the usage of delegate in usercontrols. The scenario is I have got a user control which acts as a footer
on all the pages, It has the following place holders : Email, Print, Logout.
What I want to acheive here is when the customer logged in he/she has certain feauture's on the website for instance his/her personal diary,
dieting charts, birthday calender etc. I have figured out a way to create pdf's of each summary , what I am looking for is how to use the usercontrol
for instance when the customer clicks on the email place holder on certain page which is in the footer usercontrol, the following place holder should send
an email with the pdf file of that particular page attached to the customer. I came to know that delegate is the best way of doing it, but I cant find any specific tutorial on it.
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Jul 5, 2010
I'm trying to program a site so object oriented as I am able to....To do this I found a Paging example on the net.....but written in VB - and I'm programming in C#.In the VB example there is a line:
[Code]....
I have googled this a while now - and what I can figure out is there is missing something.....But I cann't figure out what.
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Jan 15, 2010
I have a gridview in my page, called "GridView1", and Paging is enabled.I want to create a handler for PageSelectedIndexChanged but i keep getting this error: No overload for 'PageSelectedIndexChanged' matches delegate 'System.EventHandler'
asp:GridView
ID="GridView1"
runat="server"
OnPageIndexChanged="GridView1_PageSelectedIndexChanged"
[code]...
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Oct 19, 2010
It highlights this bit of code:
<asp:DataList ID="DataList1" runat="server" DataKeyField="uniqueid"
protected void Page_Load(object sender, EventArgs e)
protected void DataList1_Load(object sender, DataListItemEventArgs e)
Label Label1 = (Label)e.Item.FindControl("Label1");
Label Label2 = (Label)e.Item.FindControl("Label2");
Label Label3 = (Label)e.Item.FindControl("Label3");
[code]...
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May 14, 2010
I was able to get a user control to use a method on the parent page. The problem is, the delegate causes the page to do two postbacks. Is there a way to fix this?
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May 19, 2010
I am getting this build error on the following line of code, and do not find anyhting wrong there.
public partial class _Default : System.Web.UI.Page
{
}
[code]...
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