asp.net error A first chance exception of type - ASP.NET Discussion Boards

Re: optimized load of asp.net dll

markovl10-Jul-12 19:45

markovl

10-Jul-12 19:45

Check your web.config file, if it includes the compilation.debug option and it's set to true:

XML

<configuration>
  <system.web>
    <compilation debug="true" />
  </system.web>
</configuration>

Also, see if the Suppress JIT optimization on module load option is not unchecked. (It's found under Options->Debugging->General).

What exactly happens when you add a breakpoint and run your app?

Re: optimized load of asp.net dll

sc steinhayse11-Jul-12 10:33

sc steinhayse

11-Jul-12 10:33

Until two weeks ago I could not even step through the code. I changed a debugging option to just be able to see my code.
I will check inot what you suggested.

basically what happens are the variables are optimized and that is why I can not see their values.
In all the project files, I have the 'optimized' option unchecked.

web app using linq to sql

dcof8-Jul-12 6:16

dcof

8-Jul-12 6:16

I am asking this question since I would like to know what is the best method of coding in a C # 2010 web form page that I just wrote. I read somewhere that everytime you need a datacontext object, you should
create it. There was no reference also to removing the datacontext object.

Thus on the current web form page that I am using that connects to a sql server 2008 r2 database, I am doing the following:

1. I never remove the AttDataContext from memory.

2. On the same web page, I am referring to the same linq to sql *.dbml file. However depending upon what I user clicks on, I have the following 3 datacontext objects:

a. AttDataContext,

b. Att2DataContext,

c. Att3DataContext.

Can you tell me if the above if a good idea or not? If not, can you tell me how I should use the same data context object on the same web form page?

Re: web app using linq to sql

R. Giskard Reventlov9-Jul-12 5:21

R. Giskard Reventlov

9-Jul-12 5:21

Implement the using pattern when invoking these objects:

using (AttDataContext db = new AttDataContext())
{
    /// do whatever you want with db.
}

This construct will close and dispose for you. You should not maintain an active connection where it is not required.

"If you think it's expensive to hire a professional to do the job, wait until you hire an amateur." Red Adair.
nils illegitimus carborundum

me, me, me

Web.config with variable or key inside

Marius DUMITRU8-Jul-12 0:39

Marius DUMITRU

8-Jul-12 0:39

Hello.
Is it possible to achive this:
(all is inside web.config)
<configuration>

<appSettings>
<add key="strSQLServer" value="srvproduction\SQL2008Express">
</appSettings>

<connectionStrings>
<add name="dbConn" connectionString="Data Source=" + key["strSQLServer"] + ";MultipleActiveResultSets=True;Initial Catalog=db1;Persist Security Info=True;Connection Timeout=600;User ID=sa;Password=***" providerName="System.Data.SqlClient"/>
</connectionStrings>

</configuration>
Like I said at the begining: all is inside web.config
??

Re: Web.config with variable or key inside

Sandeep Mewara8-Jul-12 4:31

Sandeep Mewara

8-Jul-12 4:31

Marius DUMITRU wrote:
Is it possible to achive this:
(all is inside web.config)
connectionString="Data Source=" + key["strSQLServer"] + ";MultipleActiveResultSets=True;

No. Not possible. Web.Config is application's configuration file and not a programming logic in itself. You can maximum write in web.config file but it will not evaluate things in it by itself. It's a simple config file.

Last but not the least, what you ask is not needed - I don't think there is any reason to have/do it like this.

Config file is the way to provide defined connection string. If you want multiple datasource, then just define multiple connection strings.
Refer: MSDN: connectionStrings Element (ASP.NET Settings Schema)[^]

Sandeep Mewara
[My last article]: Server side Delimiters in ASP.NET[^]

Re: Web.config with variable or key inside

Karthik. A9-Jul-12 9:48

Karthik. A

9-Jul-12 9:48

Why not just do this ?

<configuration>
<connectionStrings>
<add name="dbConn" connectionString="Data Source=srvproduction\SQL2008Express;MultipleActiveResultSets=True;Initial Catalog=db1;Persist Security Info=True;Connection Timeout=600;User ID=sa;Password=***" providerName="System.Data.SqlClient"/>
</connectionStrings>
</configuration>

As Sandeep said, you cannot have programming logic w/in your web.config file.

Cheers,
Karthik

asp.net error A first chance exception of type

dcof7-Jul-12 19:26

dcof

7-Jul-12 19:26

When I am debugging a C# 2010 web application, I am getting the error, "A first chance exception of type 'System.Web.HttpParseException' occurred in System.Web.dll" sometimes.

I am wondering if you can suggest in what situations this error could be occuring and/or possibly help me to determine when this type of error is occuring?

The only thing I think that can be causing this error is when a user finishes working on my new pages on the company website. My new web pages run in a series of 5 pages. When they have finsished entering data for one customer i redirect the user to the first of the 5 pages. at any point the user can click the 'logout' button that is at the top of all the master pages. Could this be an issue?

asp.net debug error message

dcof7-Jul-12 19:25

dcof

7-Jul-12 19:25

When I am stepping through code for a C# 2010 web form application,there are times when I can see the values of variables and there are times where I can not see the value of variables. I am wondering what is causing this and how I make make certain I can see the values of the variables.

Here are some of the messages that I see and I am wondering if these error messages are related or not? What do you suggest I do to resolve the issues with the error messages?

fhe name 'filteredList' does not exist in the current context  results Cannot obtain value of local or argument 'results' as it is not available at this instruction pointer, possibly because it has been optimized away.  Step into: Stepping over method without symbols 'System.Web.UI.WebControls.ListControl.SelectedValue.get' Step into: Stepping over method without symbols 'string.Concat' Step into: Stepping over method without symbols 'System.Web.HttpApplication.ExecuteStep' Step into: Stepping over method without symbols 'System.Web.HttpApplication.BeginProcessRequestNotification'

Note: when a message says a value is not available, I am in the method at the time and I should be able to see value.

Re: asp.net debug error message

Sandeep Mewara7-Jul-12 21:12

Sandeep Mewara

7-Jul-12 21:12

It might be that your project or solution is not in DEBUG mode.

See a similar issue discussed and resolved here: “Cannot evaluate expression because the code of the current method is optimized” in Visual Studio 2010[^]

Sandeep Mewara
[My last article]: Server side Delimiters in ASP.NET[^]

Re: asp.net debug error message

dcof8-Jul-12 6:15

dcof

8-Jul-12 6:15

I did know what the following,"It might be that your project or solution is not in DEBUG mode."

Thus can you tell me how to make certain my proejct and solution are both in debug mode? I do not know how to do this.

Re: asp.net debug error message

Sandeep Mewara11-Jul-12 1:55

Sandeep Mewara

11-Jul-12 1:55

Try: Right click solution -> Properties -> Configuration properties.

Sandeep Mewara
[My last article]: Server side Delimiters in ASP.NET[^]

news article page

Jassim Rahma7-Jul-12 10:44

Jassim Rahma

7-Jul-12 10:44

If you visit bbc or cnn or any other news page you will see the news article page with rich text and images.

What is the best to do this in ASP.net if I want to create an entry page for users to create such pages for them self? Will database be a good idea?

Re: news article page

Sandeep Mewara8-Jul-12 4:18

Sandeep Mewara

8-Jul-12 4:18

jrahma wrote:
What is the best to do this in ASP.net

Silverlight was introduced for rich applications in ASP.NET earlier but HTML5 with CSS3 looks the right way currently. Try HTML5 for rich UI.
You can start reading about it from here: http://www.w3schools.com/html5/default.asp[^]

jrahma wrote:
Will database be a good idea?

No idea where from database came into picture here!

Sandeep Mewara
[My last article]: Server side Delimiters in ASP.NET[^]

Re: news article page

Joshua Omundson9-Jul-12 13:27

Joshua Omundson

9-Jul-12 13:27

I'm sure the OP is asking if a database would be a good way to store the news articles, pictures, etc.

Re: news article page

zhxhdean11-Jul-12 19:28

zhxhdean

11-Jul-12 19:28

hi,
text,images's path into database,images into files of server Laugh | :laugh:

asp.net

rinku rlsual7-Jul-12 7:00

rinku rlsual

7-Jul-12 7:00

what is the beginner coding for creating web designing.

Re: asp.net

Sandeep Mewara7-Jul-12 7:59

Sandeep Mewara

7-Jul-12 7:59

Sounds like you are into web and started with ASP.NET.

Start from here: ASP.NET Tutorial: Your first website[^]

Look at these too to learn more:
ASP.Net get started[^]
ASP.NET Projects from CodePlex [^]
MSDN: ASP.NET Developer Center[^]
ASP.NET website[^]

Sandeep Mewara
[My last article]: Server side Delimiters in ASP.NET[^]

Re: asp.net

AmitGajjar10-Jul-12 22:40

AmitGajjar

10-Jul-12 22:40

My Favorite C# book[^] please refere once if you are interested in C#

Re: asp.net

zhxhdean11-Jul-12 19:31

zhxhdean

11-Jul-12 19:31

you must study html/css/javascript/asp.net/sqlserver etc

Groupvalidation in asp.net

deeptul7-Jul-12 1:32

deeptul

7-Jul-12 1:32

i have login page conatiend two button login and other for regsitration my login page i applyed validation textbox1 and textbox2 as i left it blank click on Registeration button it will not allow to move regsteration page bcoz all this validation.
tell me how can i group text box with login button

Re: Groupvalidation in asp.net

Sandeep Mewara7-Jul-12 8:15

Sandeep Mewara

7-Jul-12 8:15

Just do something like:

ASP.NET

<tr>
  <td style="width: 100px"> First Name</td>
  <td style="width: 100px">
    <asp:TextBox ID="txtFirstName" runat="server" ValidationGroup="Name_Group"></asp:TextBox>
    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txtFirstName" ErrorMessage="Enter First Name" ValidationGroup="Name_Group" Width="149px"></asp:RequiredFieldValidator>
  </td>
</tr>
<tr>
   <td style="width: 100px">Last Name</td>
   <td style="width: 100px">
     <asp:TextBox ID="txtLastName" runat="server" ValidationGroup="Name_group"></asp:TextBox>
     <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtLastName"  ErrorMessage="Enter Last Name" ValidationGroup="Name_Group"Width="152px"></asp:RequiredFieldValidator>
   </td>
</tr>
<tr>
  <td style="width: 100px"></td>
  <td style="width: 100px">
    <asp:Button ID="btnRegister" runat="server" Text="Register" ValidationGroup="Register_Group" />
  </td>
</tr>

ValidationGroup="Register_Group" takes care of your scenario.

Following illustrates on how you can group them:
Validation group in ASP.Net 2.0[^]
MSDN: Specifying Validation Groups[^]

Sandeep Mewara
[My last article]: Server side Delimiters in ASP.NET[^]

Re: Groupvalidation in asp.net

deeptul11-Jul-12 6:56

deeptul

11-Jul-12 6:56

hey thankz for reply can you help me out for caching asp.net i m beginners

Re: Groupvalidation in asp.net

Sandeep Mewara11-Jul-12 7:18

Sandeep Mewara

11-Jul-12 7:18

You can just start from this article: Exploring Caching in ASP.NET[^]

Sandeep Mewara
[My last article]: Server side Delimiters in ASP.NET[^]

C# web app -not see variable values

classy_dog6-Jul-12 21:19

classy_dog

6-Jul-12 21:19

When I am debugging a C# 2010 web form application that is running against iis7 from my visual studio.net 2010 professional ide, I get messages like the following:

this Cannot obtain value of local or argument '<this>' as it is not available at this instruction pointer, possibly because it has been optimized away. Damport.DImportDataContext fileOrServerOrConnection Cannot obtain value of local or argument 'fileOrServerOrConnection' as it is not available at this instruction pointer, possibly because it has been optimized away. string mapping Cannot obtain value of local or argument 'mapping' as it is not available at this instruction pointer, possibly because it has been optimized away. System.Data.Linq.Mapping.MappingSource

This kind of error message occurs in different sections of the code. Some sections I do not have this problem.

Basically when this kind of error message occurs, I can not see the value in different variables. Thus can you tell me what I can do so that I can see the value of the variables when this error occurs?

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.