Web Forms :: "Reference Required" Illusive Error In Vb.net Web Form In A C# Project?
Apr 26, 2010
I get the following error in a c# project, asp.net 3.5, when I add any vb.net web form to the project in vwd 2008 & 2010:
BC30007:
Reference required to assembly {assembly name} containing the base class {class name}. Add one to your project.
Now I've looked all over the internet for 3 days, and can't find the solution to this one. I've got references all over the place, the aspx page, web.config, properties, am I missing something? This seems to be a pretty common problem. What should I do?
I usually only write in ASP, so I am not very familiar with this script. Can anyone tell me how to how to request a querystring so I can use it to pull the image location. Like this.
I am getting a CS0120 error when trying turn a button visible after checking some variables. In plain english, If AmmohelpSession.UserActions contains AmmohelpEnums.UserAction.ArticleEdit then turn the Edit button visible. Here is my comparison:
[Code]....
In the code behind for AmmohelpSession, a public class AmmohelpSession which contains a private variable: private HashSet<UserAction> _userActions; has been stated. In that same file, there is a public function for the UserActions that does a get or set method.In the code behind for AmmohelpEnums, we are setting byte variables to specific actions. Mine would be something like:
I bought the subject book and started to implement the sample MVC project. Everything went perfect until it came to Dependency Injection section. I'm doing everything as described in the book but I get "Object reference not set to an instance of an object." error on the line
[Code]....
I zipped the solution folder with the database script if you wanna see whether you also get the same error. I loaded the zipped folder in my skydrive: [URL]
i've been googling this for two days so here it both the error and the webconfig code.i directed the aspnet 2.0 exe to the application name/database
the problem is when the user tries signing up this error comes up, but the kicker is the user is place into the database ?The specified string is not in the form required for an e-mail address.
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.
Exception Details: System.FormatException: The specified string is not in the form required for an e-mail address.
Source Error: An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace: [FormatException: The specified string is not in the form required for an e-mail address.] System.Net.Mime.MailBnfHelper.ReadMailAddress(String data, Int32& offset, String& displayName) +1128747 System.Net.Mail.MailAddress.ParseValue(String address) +240 [code]...
I'm using jQuery and setInterval method in my asp.net web application.
I call the webservice every 5 seconds in order to check for DB changes. When i see a change, i want to change the photo of the linkButton that located on the master page, but i can to that due to static constrains.
An object reference is required for the non-static field, method, or property 'System.Web.UI.Page.Master.get'
my c# code is:
[WebMethod()] public static bool checkDBChange(string userId) { DBConnection dbConnection = new DBConnection(); if (dbConnection.isChanged(userId)) { ((Site1)Master).SetImageUrl = "~/Icons/a.ico"; } return false; }
The SetImageUrl is a setter in my master page that sets the new url to the linkButton. How I can implement it?
Getting this error when I submit my form to savetext.aspx action file:Compiler Error Message: CS0120: An object reference is required for the nonstatic field, method, or property 'System.Web.UI.Page.Request.get'
On this line: string path = "/txtfiles/" + Request.Form["file_name"];
I have an dought on adding name space in project. In one one of my project I want to add "System.SserviceModel.Web" name space. But the name space is not in .net tab of refence dialog box. How can I add this reference to the .net tab window?
I have an ASP.NET project and I want to use some AjaxToolKit Extenders on my pages.
The site is created in VS2010, set to Framework 4.0.
This is what I did:
1) Add reference "AjaxToolKit.dll" to my project.
2) Add to the toolbar the same file for the controls
3) Add "ToolkitScriptManager" to the page source.
This adds the declaration to the source as well.
Right after this I get the following error:
Reference required to assembly 'System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' containing the base class 'System.Web.UI.ScriptManager'. Add one to your project.
I have downloaded a dll that is for Glowish effects to Buttons. But the problem is that , Extender needs reference to an older version of AjaxControlToolkit, and in my project i have already used many controls based on that recent version. That i cannot change. How can i use this GlowExtender with the latest version of AjaxControlToolkit ?
I have a form that contains several textboxes and each one paired with a required validator. Each box reads a value from a dataset, and on submit click, update the database with the new value. For some reason, one of the validator always returns the error message even if I enter a value in the textbox. My code is something like this.
I'm receiving the following error and can't figure out how to fix it:
The specified string is not in the form required for an e-mail address.
It is only happening as soon as I change the message.From to a textbox rather than a static email address. I have pasted the relevant code below:
[Code]....
I did not post the whole block of code but why is this happening when I change the message.From to emailTextBox.Text instead of a static value? And yes I do have valid email addresses in web.config and code.
There is a C#.net libraray project whose dll name is customer.dll. It has a class name customer with a function name show(). I want to call this function from another project but dont want to add reference to the caller project. Can this be done? Is there any C#.net class that can acheive this?
in my default.aspx page i have a dropdown List and a textbox with a submit button below that there are 2 listbox... and the dropdown list holds the names of the listbox
my logic here is to select an item from the dropdown list and put some text in the text box and submit the form which will add an item to the listbox selected.. but when i do this i get an error saying Object reference not set to an instance of an object. i tried to figure out the problem and found that when i remove the reference to the Site Master Page it works fine and when i undo and apply my reference back to the Site Master Page i get the same error.
http://www.somepage.com/main.aspx. In this page, when I click on a link it takes me to a page http://www.somepage.com/cental.aspx?cid=200. So in the cental.aspx.cs page I did the following in the page load:
if(request.querystring["comp"].tostring() != null) { //do some thing [code].....
So I got an error like: object reference not set to an instance of reference.My problem is, I am using the same page. So when I go from some page, I will have "comp". but other times not. So when there is no "comp", how do I handle it in request.querystring?
I am moving from one laptop (WinXP Pro) to another (Win7 Pro). I have re-installed VS 2008 (which wasn't straightforward BTW).
On copying one of my web projects, now when I choose "view in browser" to look at my handiwork, Firefox now requires authentication. I use my windows username/password.
But IE8 doesn't require authentication.
I don't need authentication if I run VS 2008 as Administrator.
It's not a show-stopper, but it could prove irritating.
Aplogies if this has been discussed before but I couldn't find an answer.
I'm trying to use jquery/Ajax to access some webmethods in my codebehind. This is fine, but I would in my function like to reference a placeholder (phStory in the code below) on my page and also load a usercontrol into that placeholder.
Unfortunately I get the message: "An object reference is required for the non-static field, method, or property 'TestControls.phStory' " and similar for the usercontrol. Does anyone know how I can still access my placeholder and usercontrol from within this.
It has to be stati as it's a WebMethod but this then throws up these errors.
I am using grid view as mentioned below, it is giving me error "object reference not set", but if comment allowpaging and pagesize lines, it works. let me know whats wrong I am doing?
I have downloaded a project from the internet called the SMS Source example. I wanted to open this project in VS2010, so a conversion wizard has popped up prompting for the conversion. But it has errors in converting.
I search the eror But I found nothing. My Mail setting is well form. Is there any idea what couse of this exception?Mail Configuration
<add key="SMTPFrom" value="mailer@mycompany.com" /> <add key="SMTPReplyTo" value="mailer@mycompany.com"/> <add key="SMTPCredentialUserName" value="company_mailer_system"/> <add key="SMTPCredentialPassword" value="password"/> <add key="SMTPHost" value="hostUrl" /> I add some mailaddress myMail.To.Add(to) and to contains mail addresses splited by ;
If I complete the email and message fields but not the name, I get an onscreen error message in red - that's fine. But if I leave the @ out of the email address I get this:
The specified string is not in the form required for an e-mail address.
Stack Trace:
[FormatException: The specified string is not in the form required for an e-mail address.] System.Net.Mail.MailAddressParser.ReadCfwsAndThrowIfIncomplete(String data, Int32 index) +1560321 System.Net.Mail.MailAddressParser.ParseDomain(String data, Int32& index) +131 System.Net.Mail.MailAddressParser.ParseAddress(String data, Boolean expectMultipleAddresses, Int32& index) +99
[Code] ....
There is no error message on screen. For each field, I have the following (stripped) in my contact.aspx form:
Code:
<asp:TextBox ID="your_name" runat="server" required></asp:TextBox></p> <asp:RequiredFieldValidator Display="Dynamic" ID="RequiredFieldValidator1" runat="server" controlToValidate="your_name" ErrorMessage="Please complete the Name field"></asp:RequiredFieldValidator>
For WPF, there's the Microsoft Patterns & Practices's Prism project.
Prism provides guidance designed to you more easily design and build rich, flexible, and easy-to-maintain Windows Presentation Foundation (WPF) desktop applications, Silverlight Rich Internet Applications (RIAs), and Windows Phone 7 applications I was wondering whether a similar project (reference implementation) intended for software developers building WCF applications exists.
In our main internal project (a .Net WinForms rich client app), we don't talk directly with the database but instead fetch and update data with ASP.Net web-services that we also control. Our current setup is giving us some bottlenecks. For a new smallish project, we want to try WCF. Objective question: Where do I find a not-too-basic WCF reference project?
I recently updated my VS2010 website project from .NET 3.5 to 4.0. Everything was working fine in the website project. Today I decided to migrate the website to a web application project as I have learned this is the best way to work in .NET. I split out all my class files into a separate class library and copied all my other content into my new project. Then I updated all the references and web.config.
When I build the class library, everything works great. The problem is happening when I try to build/debug the web application project. It is acting like all the controls are missing and it is also throwing a bunch of compile errors about the public properties I have in my master pages.
Control errors: "The name 'INSERT CONTROL NAME HERE' does not exist in the current context"
Master page errors:'System.Web.UI.MasterPage' does not contain a definition....
It is giving these errors for every single control and master page property in my entire solution.I notice when I add a new web.form to this project, it also adds a filename.aspx.designer.cs file in addition to the .aspx and .aspx.cs file. My existing files do not have these extra files since they were created in a different .NET version.
UPDATE: It seems I was missing the step where I need to right click on the new application folder and select "Convert to web application". I just did that and it seems to be a little bit better...
Now it is choking on Literals that are inside single quotes:
