System.Configuration.ConfigurationManager Throwing Exception?

Mar 17, 2011

I am having this strange case, at first time when the page loades, everything goes fine. But as soon as I click on any link which makes any ajax request, after that, I get this error while trying to read the configuration."System.Configuration.ConfigurationManager.ConnectionStrings' threw an exception of type 'System.Web.HttpException"I am using asp.net mvc 1.0

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Configuration :: ConfigurationManager.AppSettings Exception?

Feb 11, 2011

I am retrieving value from webconfig file.

PriceCode = ConfigurationManager.AppSettings[d.PriceCode].ToString() == "" ? "XXXX" : ConfigurationManager.AppSettings[d.PriceCode].ToString(),

if the value is found its fine, but if the value is not found in webconfig file an exception is thrown... why is that?

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Web Forms :: Fileupload / When Deployed App On Server And Accessed It From Client System Its Not Throwing Exception?

Nov 3, 2010

I m uploading file to a directory inside my website root directory like this-

[Code]....

I m getting exception-

System.IO.DirectoryNotFoundException: Could not find a part of the path 'C:Documents and SettingsAdminMy DocumentsVisual Studio 2008WebSitesElcomponics Sales-BDsamples�50841010_sd113201031833.pdf'.

Why so?

When i deployed my app on server and accessed it from client system. It is not throwing exception.What is the difference?

Still i want to confirm will it throw the same exception in case i deployed it to server and access it from client.

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Configuration :: Exception Of Type 'System.OutOfMemoryException'?

Aug 3, 2010

We have an asp.net 2.0 application in which we get the exception of type 'System.OutOfMemoryException' whenever value is retrieved or stored in viewstate. It does not happen when we test it in local PC but when it is deployed on application server, the exception is thrown.

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Configuration :: Exception Of Type 'System.OutOfMemoryException' Was Thrown?

Jan 20, 2011

I am getting Error Msg Given Below..After Uploading My WebApplication..whenever i try to access my webapplication? what is the exactly reason of this Error. Some time it solved automatically when i try some time later.

Server Error in '/' Application.

Exception of type 'System.OutOfMemoryException' was thrown.
Description:
An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
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Web Forms :: System.ConfigurationManager.AppSettings - Get Data From?

Mar 1, 2010

I am maintaining some Asp.net code and need some help figuring something out. Basically I have a C# statememt that reads as follows

String Em = System.ConfigurationManager.AppSettings.Get("EmailAddress")

So something tells me it is trying to read an email address. I looked in the web.config file and I don't see the string "EmailAdress" defined in the <appsettings> tags or anywhere else. Could I be looking in the wrong web.config file? Or where is system.ConfigurationManager.AppSettngs looking for the definition of the email address?

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Configuration :: Getting System.outofmemory Exception On The Server On Accessing The Login Page

Sep 27, 2010

I have an asp.net web app running fine on localhost but I get the system.outofmemory exception on the server on accessing the login page.what should I do to get rid of this problem.

I have very simple code on page load as below:

[Code]....

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Configuration :: The Type Initializer For 'System.Drawing.ToolboxBitmapAttribute' Threw An Exception?

Nov 1, 2010

All of a sudden I started getting this nasty exception all over the place:

The type initializer for 'System.Drawing.ToolboxBitmapAttribute' threw an exception.

Some relevant observations: * The error started occuring a few hours after the last deployment to the live server, not immediately after. So it basically started occuring of its own accord.

* We have recently moved to a new host (a VPS). The error only occurs on that server, not our local server nor at the old host's (which was a shared environment).

* The problem is basically the same as this: [URL]

* I tried reinstalling Ajax extensions, then our website in IIS, then finally the .Net 2 framework. But the error still occurs after all this.

* The error occurs on line 1, which is just the page directive: <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="Test.WebForm1" %>

I'm finding it difficult to get a decent trace, but here is one that our CMS provided:

The type initializer for 'System.Drawing.ToolboxBitmapAttribute' threw an exception.
at System.Web.UI.TemplateParser.ProcessException(Exception ex)
at System.Web.UI.TemplateParser.ParseStringInternal(String text, Encoding fileEncoding)
at System.Web.UI.TemplateParser.ParseString(String text, VirtualPath virtualPath, Encoding fileEncoding)
at System.Web.UI.TemplateParser.ParseFile(String physicalPath, VirtualPath virtualPath)
at System.Web.UI.TemplateParser.ParseInternal()
at System.Web.UI.TemplateParser.Parse()
at System.Web.Compilation.BaseTemplateBuildProvider.get_CodeCompilerType()
at System.Web.Compilation.BuildProvider.GetCompilerTypeFromBuildProvider(BuildProvider buildProvider)
at System.Web.Compilation.BuildProvidersCompiler.ProcessBuildProviders()
at System.Web.Compilation.BuildProvidersCompiler.PerformBuild()
at System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath)
at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile)
at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile)
at System.Web.UI.TemplateControl.LoadControl(VirtualPath virtualPath)
at System.Web.UI.TemplateControl.LoadControl(String virtualPath)
at umbraco.macro.loadUserControl(String fileName, Hashtable attributes, page umbPage)

My own code doesn't use the ToolboxBitmapAttribute, but third party products like Peter Blum's and Telerik's do.

Peter Blum replied with some useful hints:

* The "type initializer" concept probably needs some research, but I'm guessing that is an important clue. A quick web search of "type initializer" finds many situations it occurs for a variety of classes.

* The stack trace suggests that this is happening as ASP.NET is compiling your web form. The error is happening as the ASP.NET parser runs. Again this is external from my code (even creating or "type initializing" the attribute is not something my code does).

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What Is The Point Of Throwing An Exception

Apr 15, 2010

What is the point of throwing an exception? It it anyways going to be caught in the Global.asax Application_Error method.

Lets say in the following code we throw an exception.

try {
using (var dc = GetDataContext())
{
// We are doing some data inserts here.
}
catch ( Exception ex)
{
throw ex;
}

My Question: Even if we do not use try catch and throw here, any exception which will be raised here will be caught inside Application_Error method in Global.asax. Then what is the point of try, catch and throw in this case?

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Throwing Exception To Get A Message Back To UI?

Feb 3, 2010

I have an asp.net application with separate classes for business logic and database interaction and then of course the UI. I am building a form to add a widget to a widget list table in the database. My UI collects the information and submits it to the business class. I'm going to write the business class to first double check that the widget has a name (I know I should do this in UI with validation, and I will, but this is just in case validation is forgotten) and if it does, go ahead and send the information to the database class. The database class will then attempt to write the info to the correct table using a try catch finally block. Any errors caught here are logged and then rethrown so I can inform the user. So, knowing that my database class may rethrow an error, my business class code will also be written in a try catch finally block.

So at this point I have a number of possible outcomes that I want to inform the user via the UI:

1) Everything was fine and the widget was added.

2) Something happened with the database write and the user should try again later.

3) The user forgot to name the widget.

My question is: should I write my UI in a try catch block and then throw a custom Exception with an Exception.Message in the business layer if anything goes wrong, or just have my business logic return a string that is the message? I'll want to know if the process was successful or not, because I'll want to format the actual message differently, so I'd have to use if...elseif to determine if the message was bad or not.

It seems like throwing a custom Exception in the business layer may be a good way to tell the UI something bad happened. If the UI doesn't catch anything then of course the operation was successful. Then again throwing an exception for missing data seems a bit hefty.

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ToolkitScriptManager Throwing Exception On Calling Page_ClientValidate

Jan 17, 2011

I am using AjaxToolkit 4.0 which suggests to use ToolkitScriptManager in place of ScriptManager. But when I am using ToolkitScriptManager, it throws javascript exception when Page_ClientValidate() in called from javascript. However, this error is not coming when ScriptManager is used. Can anybody tell me how to make Page_ClientValidate() run when using ToolkitScriptManager?

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C# - Send Method Of SMTP Is Always Throwing An Exception

Mar 25, 2011

The send method of SMTP is always throwing an exception. The message is : Failure sending mail Here is my code:

MailMessage mm = new MailMessage();
mm.To.Add("Yuvraj.dhot@xxxxx.co.in");
mm.From = new MailAddress("Kumar.Chaudhari@xxxxx.co.in");
mm.Subject = "Ant Subject";
mm.Body = "Body Cha MEssag here ";
SmtpClient ss = new SmtpClient("localhost");
ss.EnableSsl = false;
try
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**ss.Send(mm);**
Result.Text = "Message Sent";
Result.ForeColor = System.Drawing.Color.Green;
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I also tried using

ss.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis;

Now it doesn't throw any exception, it executes fine but receiver does not receive any mail in his inbox. How can I fix this? Edit - This is the stack trace im getting.................

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Security - Prevent Web Caching Throwing Exception?

Jan 18, 2011

I am trying to stop the caching of web pages using the following snippets in the ASP.NET however its not working and showing following error to me,

Response.CacheControl = "no-store";
Response.AddHeader("Pragma", "no-cache");
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[code]...

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Padarn Web Server Project Throwing Exception?

Feb 14, 2011

I'm testing our OpenNetCF's Padarn Web Server.

In one of their Hands-On-Labs (HOL P101), an exception is being thrown at

private WebServer m_padarnServer = new WebServer();

The exception reads, "Exception in ConfigSectionHandler".

If you have experience with Padarn, have you received this exception before? If so, can you shed some light as to what I may do to debug this error?

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Throwing Exception When Field Is Zero And Clicking Edit Linkbutton

Mar 22, 2010

I have a radcombobox in radgrid nested inside FormTemplate:

Code:

<telerik:RadComboBox Skin="WebBlue" Width="250px" Height="150px" runat="server"
ID="TitleCombo" OnDataBound="Title_DataBound"
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OnSelectedIndexChanged="Title_SelectedIndexChanged" AutoPostBack="true" />

then i insert an item to the top of list (at zero index):

Code:

protected void Title_DataBound(object sender, EventArgs e)
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It works perfect but, IF the Title field is zero and you Click EDIT LinkButton it throws an exception: Selection out of range Parameter name: value I would say that it's expected as zero index does not exist at the moment when i click edit button. I bind the combo from within RadGrid1_ItemCreated event.

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Configuration :: ConfigurationManager Seems To Compile The Values Into Binary?

Jul 23, 2010

This is a bizarre behaviour I've just noticed, but very dangerous.I have the following line of code:

using (SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["SmartFormsDB"].ConnectionString))

When I run in my dev environment works fine, but when I compile and push my code to the test machine that contains a web.config with a Test DB setting, the test website
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HttpContext.Current.Session Is Throwing Exception In Business Class

Sep 8, 2010

In our application we have to access session objects in business class. We are using HttpContext.Current.Session to get the session value. In some cases it returns the value but mostly its throwing a null reference exception(Object reference not set to an instance of an object). We have the following code Try

If HttpContext.Current.Session("Username") IsNot Nothing then
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'Log to db
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Here HttpContext.Current.Session("Username") is mostly throwing an exception "Object reference not set to an instance of an object" While debugging we found that HttpContext.Current itself is nothing.

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Site Went Down With Dictionary Throwing Index Outof Range Exception?

Jul 20, 2010

I have a static dictionary object which hold some Key and Value pairs in our site.We are getting Indexoutofrange exception some times and we couldn't figureout the problem why it is causing.This error is logged several times in the log file and site went down.Do you have any idea why this is happend?Please provide your advice ASAP as we are facing this issue in live server.

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The exception is thrown on the last line when I add DV.Rows(0).Cells(1).Text to the id_num parameter. I know there is a value in the dataview because it is displayed on the page. I can refresh the dataview with another person's information and the code works fine. This really has me confused. Here is a bit of the code behind.

Dim dashDataSource
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Throwing Exception Message Giving Internal Server Error HTTP Code 500 On Live Site

Oct 4, 2010

using vb.net/asp.net 2005

when a user enters a bad email I am doing a check on this and throwing an exception message as follows, this works fine on the test site but for some reason the same code on the live site gives a "internal server error" (http code 500). The code below:

[Code]....

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Windows Server 2003 - Site Throwing A System.Security.SecurityException?

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<body id="body" runat="server">
<div class="conteneur-confirmation">
<%

[code]...

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A First Chance Exception Of Type 'System.Data.Odbc.OdbcException' Occurred In System?

Jul 6, 2010

I have been trying to get the data display on the datagrid after selecting a customer.

With the same connection it populates the selection right. But just do not seem to extract the following SQL.

The litABC is to check the flow of control.

There is no syntax error but in the debug menu,

I got A first chance exception of type 'System.Data.Odbc.OdbcException' occurred in System.

Where did I do wrong?

[code]....

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Jun 8, 2010

An unhandled exception of type 'System.InvalidOperationException' occurred in System.Xml.dll

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Nov 25, 2010

When i fill my sql adapter daAuthors.Fill(dsPubs, "MYTable") sometime i get A first chance exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dllmy code can run for a lot hours without any problems but sometime i get the message

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Web Forms :: Server.Transfer Throwing An Exception "error: Canot Obtain Value"?

Mar 1, 2010

I am using Server.Transfer("axpx page", True) in my page.aspx.vb code. This line of code is there in the Try block. The exception "error : canot obtain value" is occurred when this line is executed. This is started all of sudden in the production.I have temporarily fixed this by keeping this line after try - catch block. But I'm not sure why is this problem occurred?

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