Questions tagged [asp.net-3.5]
asp.net-3.5 is the 3.5 version of web development framework asp.net, part of .Net. It features: ASP.NET AJAX as a part of the runtime, new LINQ data capabilities, improved support for CSS.
asp.net-3.5
1,125
questions
859
votes
22
answers
1.0m
views
How can I deserialize JSON to a simple Dictionary<string,string> in ASP.NET?
I have a simple key/value list in JSON being sent back to ASP.NET via POST. Example:
{ "key1": "value1", "key2": "value2"}
I AM NOT TRYING TO DESERIALIZE INTO STRONGLY-TYPED .NET OBJECTS
I simply ...
- 35k
100
votes
11
answers
158k
views
Unable to convert MySQL date/time value to System.DateTime
I get this error:
Unable to convert MySQL date/time value to System.DateTime
while I am trying to fetch the data from a MySQL database.
I have the date datatype in my MySQL database. But while ...
- 2,395
79
votes
2
answers
81k
views
Create Text File Without BOM
I tried this aproach without any success
the code I'm using:
// File name
String filename = String.Format("{0:ddMMyyHHmm}", dtFileCreated);
String filePath = Path.Combine(Server.MapPath("App_Data"),...
- 74.3k
66
votes
2
answers
103k
views
Forms Authentication Timeout vs Session Timeout
In my asp.net website i am using asp.net form authentication with following configuration
<authentication mode="Forms">
<forms loginUrl="~/Pages/Common/Login.aspx"
defaultUrl="...
- 4,122
45
votes
3
answers
61k
views
How to make update panel in ASP.NET MVC
How do I make an update panel in the ASP.NET Model-View-Contoller (MVC) framework?
- 18.7k
41
votes
7
answers
144k
views
how to solve Error cannot add duplicate collection entry of type add with unique key attribute 'value' in iis 7
I created a asp.net website and published it in iis 7. I deleted the default website option in the iis 7 and created the new website in the iis 7. When i click the default document I got the error ...
- 411
41
votes
6
answers
158k
views
How to initialize a list with constructor?
I have a type:
public class Human
{
public int Id { get; set; }
public string Address { get; set; }
public string Name { get; set; }
public List<ContactNumber> ContactNumbers { ...
- 5,600
38
votes
6
answers
36k
views
Check that email address is valid for System.Net.Mail.MailAddress
Currently, to avoid errors from being thrown up due to invalid email addresses, I do the following:
Dim mailAddress As MailAddress
Try
mailAddress = New MailAddress("testing@[email protected]")
...
- 102k
34
votes
1
answer
21k
views
creating a user in Active Directory: A device attached to the system is not functioning
Consider this code attempting to create an Active Directory account. It's generating an exception here with a certain set of data. It's not clear right now what's causing the exception.
var user = ...
- 99.5k
31
votes
2
answers
28k
views
How the session work in asp.net?
Please any one suggest me how the session is actually work in asp.net?
I am confuse in part of session and want to briefly knowledge of it so please guide me
- 311
30
votes
5
answers
312k
views
Convert a string to a datetime
I am developing asp.net site using vb framework 3.5.
Im having difficulties converting string data into Date
I tried using cdate function,
I have a variable sdate which is a string variable and ...
- 4,018
30
votes
5
answers
75k
views
Stopping onclick from firing when onclientclick is false?
Is it possible to use the onclientclick property of a button to do a clientside check. If the check returns true, then fire the onclick event. If the clientside check returns false, don't fire the ...
- 15.7k
24
votes
3
answers
85k
views
Get item count of a list<> using Linq
I want to query a List<> and find out how MANY items match the selection criteria. using LINQ and c# /.net 3.5. How would I modify the query to return an int count.
var specialBook = from n in ...
- 5,322
24
votes
6
answers
80k
views
The SELECT permission was denied on the object 'Address', database 'CNET_85731', schema 'dbo'
I have been working away for the last 7 months on a C# ASP.NET using Visual Studio 2008 and SQL Server 2008.
Today, I was running part of my application which was previously running and I got the ...
- 1,293
24
votes
2
answers
44k
views
Store and Retrieve values from web.config
I built a small website and there will be only one admin, so in the admin panel I am asking for a password with a value that I do not retrieve from a database, I just hard coded it in the function in ...
- 1,030
24
votes
3
answers
15k
views
How to make per- http Request cache in ASP.NET 3.5
We using ASP.NET 3.5 (Controls-based approach) and need to have storage specific for one http request only.
Thread-specific cache with keys from session id won't work because threads are supposed to ...
- 7,335
24
votes
7
answers
54k
views
The Just-In-Time debugger was launched without necessary security permission
We are working on vs 2010 windows 7, 32 bit and the project is running under target framework 3.5.
Now we are implementing credit card process in the website project in signup page.
It's running ...
- 10.6k
23
votes
5
answers
42k
views
Access a control inside a the LayoutTemplate of a ListView
How do I access a Control in the LayoutTemplate of a ListView control?
I need to get to litControlTitle and set its Text attribute.
<asp:ListView ID="lv" runat="server">
<LayoutTemplate&...
- 6,529
22
votes
5
answers
27k
views
Reading system.net/mailSettings/smtp from Web.config in Medium trust environment
I have some inherited code which stores SMTP server, username, password in the system.net/mailSettings/smtp section of the Web.config.
It used to read them like so:
Configuration c = ...
- 4,222
22
votes
12
answers
28k
views
LINQ to SQL -- Can't modify return type of stored procedure
When I drag a particular stored procedure into the VS 2008 dbml designer, it shows up with Return Type set to "none", and it's read only so I can't change it. The designer code shows it as returning ...
- 4,361
22
votes
2
answers
19k
views
How to catch HttpRequestValidationException in production
I have this piece of code to handle the HttpRequestValidationException in my global.asax.cs file.
protected void Application_Error(object sender, EventArgs e)
{
var context = HttpContext.Current;
...
- 1,840
21
votes
4
answers
30k
views
What Causes "Internal connection fatal errors"
I've got a number of ASP.Net websites (.Net v3.5) running on a server with a SQL 2000 database backend. For several months, I've been receiving seemingly random InvalidOperationExceptions with the ...
- 36.2k
20
votes
7
answers
114k
views
Showing number in 2 decimal places in GridView
I have one GridView in a .aspx page, and am showing dynamic data in this grid, setting AutoGenerateColumns="True".
Depending upon which of the options the user selects in a combo box, I am ...
- 4,258
20
votes
2
answers
10k
views
Can I split system.serviceModel into a separate .config file?
I want to separate my system.serviceModel section of the web.config into a separate file to facilitate some environment settings. My efforts have been fruitless. When I attempt it using this method. ...
- 9,288
20
votes
4
answers
23k
views
Asp.net checkbox and html data attribute
In asp.net, if you use a custom attribute, usually it is rendered as-is.
Considering this markup (note: attributes such as id, name and for were removed in all examples as their generated id/names ...
- 8,611
19
votes
3
answers
21k
views
Making user login persistant with ASP .Net Membership
I have a website that is built in ASP.NET 3.5 & SQL Server 2005, using the sql membership provider, and presumably forms authentication.
Since security needs on my site are very low, I would like ...
- 5,731
19
votes
1
answer
11k
views
Is there a way to render Partial Views in WebForms?
I'm touching an old WebForms project but I'm long gone from it and I'm now to used to MVC. I'm trying to refractor the project and come up with a simple issue that is making me crazy...
What would be ...
- 74.3k
19
votes
3
answers
24k
views
ASP.NET MVC Master Pages
What's the difference between the ASP.NET Master Page, and the MVC Master Page? And the AJAX Master Page for that matter?
- 25k
19
votes
2
answers
35k
views
difference in physical path, root path, virtual path, relative virtual path, application path and absolute path?
I have some confusion in understanding what is different in various paths available in .Net for a resource.
I only guess Physical path is OS directory path for a resource. I am confuse and event can'...
- 5,847
17
votes
3
answers
39k
views
CS0103: The name 'Encoding' does not exist in the current context
I have a webapplication running on framework 3.5 and is installed on multiple clients, working perfectly.
Except this one client... where all webservices that the application provide fail with the ...
- 8,213
16
votes
10
answers
71k
views
Returning a single row
I'm trying to return a single row from a database:
using (connection = new SqlConnection(ConfigurationManager.AppSettings["connection"]))
{
using (command = new SqlCommand(@"select top 1 col_1, ...
- 15.7k
16
votes
8
answers
5k
views
Resources for learning LINQ?
I'm looking to learn LINQ, but I'm finding that there is a lot more to it then what I initally expected. In fact, there's so much that I'm not sure where is the best place to start. I know that there'...
- 213
16
votes
3
answers
84k
views
ASP.Net textbox onblur event
I have a textbox, whose values I need to validate (if value of textbox is 50, then display message in lblShowMsg) when the user tabs out of the textbox (onBlur event). I can't seem to get the syntax ...
- 1,302
16
votes
5
answers
4k
views
jQuery success callback called with empty response when WCF method throws an Exception
I'm tearing my hair out over this one, so bear with me (it's a long post).
Basic Info
ASP.NET 3.5 with WCF service in ASP.NET compatibility mode
Using jQuery with this service proxy for AJAX ...
- 106k
15
votes
3
answers
26k
views
The type or namespace name UpdatePanel does not exist in the namespace System.Web.UI
I'm working on a website built by another developer that targets ASP.NET 3.5. I'm trying to add an update panel around a bit of code, but whenever I attempt to do so I get the error posted in the ...
- 699
15
votes
7
answers
22k
views
log4net - Appenders not working in IIS7.5
I am able to write to a log file using log4net and Cassini/IIS dev server, but when I use IIS7.5, I can't write out to a file.
Initially, I got a security exception, so I added requirePermission="...
- 5,872
15
votes
3
answers
34k
views
How do I convert a Bitmap to byte[]?
Basically I am inserting an image using the listviews inserting event, trying to resize an image from the fileupload control, and then save it in a SQL database using LINQ.
I found some code to ...
- 753
15
votes
5
answers
4k
views
Which is a better method for storing images - folder or SQL Server as binary?
I am planning the development of a photo gallery application for a client. I am developing the app in asp.net 3.5 and would like to develop it so that I can re-use the application across multiple ...
- 5,475
14
votes
4
answers
7k
views
Is it possible to speed this method up?
I have a method that uses loops through 7,753+ objects and Gets the value of each property for each object. Each object has 14 properties.
private void InitializeData(IList objects, PropertyInfo[] ...
- 46.1k
14
votes
6
answers
13k
views
Can I negate the value in an attribute that uses an "Eval"?
I'd like to set a button's enabled state to be the negation of a value.
So given this code:
<asp:CheckBox ID="DefaultChecked"
Checked='<%# Bind("IsDefaultMessage") %>'
...
- 5,783
14
votes
6
answers
57k
views
sql server express connection string
Is there a difference between sql server connection string and the express vesion?!
- 2,106
13
votes
6
answers
33k
views
ASP.net DropDownList with no selected item
I have a ASP DropDownList with items added to it. All what I want is to make the selection after the page loaded empty so there is no a selected item.
How can I do that?
- 5,761
13
votes
4
answers
16k
views
How to call a webservice programmatically in asp.net
How to call webservice programmatically in asp.net without using add web reference?
My webservice url keeps on changing. Hence i need to capture the url at runtime and display the results.
Please ...
- 131
12
votes
9
answers
20k
views
None of my "code behind" code is being called
I have just created an ASP.NET C# project and a virtual directory for it in IIS in (as far as I know) the normal way, but I am seeing very strange behavior that I have never seen before.
It seems ...
- 48.3k
12
votes
3
answers
11k
views
Can ASP.NET MVC 3 run inside a ASP.NET 3.5 web site?
I would like to know if it is at all possible to get an MVC3 solution wrapped in a CWAB (Composite Web Application Block) solution built in 3.5?
I'm aware that in IIS, 2.0/3.5 and 4.0 sites can run ...
- 175
12
votes
6
answers
62k
views
how to get URL path on local host and on server?
Plase guide me how to get URL path excluding page name on localhost and server.
for example for the page Active.aspx local path that I want to get is here in bold.
*http://localhost:1532/WebFolder/*...
- 5,847
12
votes
3
answers
2k
views
Why does my SqlCacheDependency HasChanged come back false but almost immediately after changes to true?
I cannot figure out why the HasChanged value of my SqlCacheDependency object is coming back originally from the command execution as false, but somewhere almost immediately after it comes back from ...
- 7,078
11
votes
4
answers
14k
views
Linq: Get a list of all tables within DataContext
I have a DataContext (Linq to Sql) with over 100 tables, is it possible to get a list of all those tables and lets say print them to the console? This might be a silly question.
Thanks.
- 3,214
11
votes
4
answers
19k
views
Forcing ASP.Net to use TCP/IP to connect to SQL Server instead of named pipes
How can I force my ASP.Net application to connect to a SQL Server using TCP/IP, not Named Pipes?
I read somewhere putting "tcp:" in front of the server name in the connectionstring should do ...
- 12.6k
11
votes
2
answers
10k
views
Binding a List<string> to a Listview in asp.net 3.5
How do I bind a List to a in ASP.NET 3.5
<asp:ListView ID="lvDiagnosisCodes" runat="server">
<LayoutTemplate>
<ul>
<asp:...
- 3,525