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Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 2:47

Hi, I'm coding a C# program to include a dll I previously compiled but I keep getting the error:

The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

The code is:

using System;
using System.Threading;
using System.Collections.Generic;
using System.Reflection;
using System.IO;


namespace Threshold
{
    public partial class Form1 : Form
    {
        IDictionary<string, Assembly> _libs = new Dictionary<string, Assembly>();

		public Form1()
		{
    		AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve);
    		InitializeComponent();
		}
// yada yada yada...
}

I am probably just making a rookie mistake.

Please advise.

Thanks

Eddy Vluggen12-Jul-16 2:53

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 2:53

You are using the class "Form", which is declared in the namespace "System.Windows.Forms". Add a using;

using System.Windows.Forms

..or use the classname and namespace to specify where you want to inherit from;

public partical class Form1 : System.Windows.Forms.Form

Also make sure you have a reference to the forms' assembly.

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Member 1224497212-Jul-16 3:12

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 3:12

Ok, that fixed that...
Now the errors are:

The type 'System.ComponentModel.IComponent' is defined in an assembly that is not referenced. You must add a reference to assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

The type 'System.ComponentModel.ISynchronizeInvoke' is defined in an assembly that is not referenced. You must add a reference to assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

The type 'System.ComponentModel.Component' is defined in an assembly that is not referenced. You must add a reference to assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

Only thing is I'm using Visual studio 2012 ultimate. I can't seem to find the assemblies in:

Project > Add Reference > Framework

Any ideas?

Eddy Vluggen12-Jul-16 3:32

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 3:32

Member 12244972 wrote:
I can't seem to find the assemblies in:

The system assembly would already be in the references, if you created the project using VS. Are you mixing .NET framework versions?

What .NET version is the DLL targetting that you created?

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Member 1224497212-Jul-16 3:45

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 3:45

Ok, I understand your point. The dll was targetting .net v2.0 and the program .net v4.6.1

I rebuilt the dll targetting .net v4.6.1

Still the same issue after restarting the Visual studio.

The type 'System.ComponentModel.IComponent' is defined in an assembly that is not referenced. You must add a reference to assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

The type 'System.ComponentModel.ISynchronizeInvoke' is defined in an assembly that is not referenced. You must add a reference to assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.	

The type 'System.ComponentModel.Component' is defined in an assembly that is not referenced. You must add a reference to assembly 'System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.

Any ideas?

Eddy Vluggen12-Jul-16 3:56

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 3:56

Member 12244972 wrote:
The dll was targetting .net v2.0 and the program .net v4.6.1

Should work, might have problems if it was the other way around.

Only thing I can think of, is that you might be targetting the wrong CPU-type; if the DLL is compiled for 64 bits, and the app is targetting 32 bits, or the other way around.

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Pete O'Hanlon12-Jul-16 4:00

Pete O'Hanlon

12-Jul-16 4:00

Open up the csproj file in a text editor and look for this line:

XML

<Reference Include="System" />

If the line isn't there, include it alongside your other references.

This space for rent

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

Dave Kreskowiak12-Jul-16 3:40

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 3:40

Did you create a Console application by mistake? This is all setup for you already if you pick the Windows Forms Application project type.

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Dave Kreskowiak

Member 1224497212-Jul-16 4:12

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 4:12

Ok, created a new project for Windows form.

The recurring error now is:

Invalid token '(' in class, struct, or interface member declaration

In the code:

namespace Siren
{
    static class Program
    {
    public partial class Form1 : Form
    {
        IDictionary<string, Assembly> _libs = new Dictionary<string, Assembly>();

        // yada yada yada...

		int absW, absX, absY, absZ;
                
        // Your inputs here
        Console.Write("\nPlease input parameter 1 of first set... ");// Error occurs here...
        absW = Console.ReadLine();
     }
}
 static void Main()
 {
     Application.EnableVisualStyles();
     Application.SetCompatibleTextRenderingDefault(false);
     Application.Run(new Form1());
 }
}

Dave Kreskowiak12-Jul-16 4:15

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 4:15

The Console doesn't exist in a Windows Forms app.

Also, this looks like you're putting Console code into a Windows Forms project now, where before you where trying to use Windows Forms code in something other than a Windows Forms project.

So, which is it supposed to be? What are you really doing?

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Dave Kreskowiak

Member 1224497212-Jul-16 4:21

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 4:21

I'm being impatient because I expected to be done with this today. But since that is not going to happen, I'll stop cobbling things together and recode with fresh eyes tomorrow.
Thanks for the help.
Will get back to you.

Eddy Vluggen12-Jul-16 4:37

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 4:37

Dave Kreskowiak wrote:
The Console doesn't exist in a Windows Forms app.

Ehr.. stdout still exists in a WinForm. It is just a console-app that hides its console and puts up a GUI.

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Dave Kreskowiak12-Jul-16 5:15

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 5:15

Yes, it does but the the purpose of this guys apparent homework, no it doesn't.

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Eddy Vluggen12-Jul-16 6:15

Re: The type or namespace name 'Form' could not be found (are you missing a using directive or an assembly reference?)

12-Jul-16 6:15

Homework is a strict assignment in order to learn a specific subject or topic.

This does not look like homework.

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Dave Kreskowiak12-Jul-16 6:18

Removing '\' character from string.

12-Jul-16 6:18

Whoops. My bad. I got this one confused with another thread.

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Raghavendra.Kodimala11-Jul-16 22:45

Raghavendra.Kodimala

11-Jul-16 22:45

Hi,
I am converting a model into Xml format. That gives me xml in string. This string consists several \" character instead of ".

I need to remove all \ character from string. I tried remove by using replace method but it's not going. Is it possible to remove this character?

Re: Removing '\' character from string.

Richard MacCutchan11-Jul-16 23:31

Richard MacCutchan

11-Jul-16 23:31

Please edit your question and show the actual data and the code you are using.

Re: Removing '\' character from string.

Eddy Vluggen11-Jul-16 23:55

What can be wrong with my code I can't Log In VS2015

11-Jul-16 23:55

Where are you seeing these characters? In the debugger?

If yes, do a Debug.WriteLine, and you'll see that those characters aren't really there Smile | :)

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Member 1228884011-Jul-16 7:27

Member 12288840

11-Jul-16 7:27

SqlCommand cmd = new SqlCommand("Select * FROM tbl_Loging where User Name=@user_name and Password=@password", con);
cmd.Parameters.AddWithValue("@user_name", text_User_Name.Text);
cmd.Parameters.AddWithValue("@password", text_Password.Text);
con.Open();
SqlDataAdapter adapt = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
adapt.Fill(ds);
con.Close();

Error : An expression of non-boolean type specified in a context where a condition is expected near 'Name"

P David

Re: What can be wrong with my code I can't Log In VS2015

Eddy Vluggen11-Jul-16 7:46

Re: What can be wrong with my code I can't Log In VS2015

11-Jul-16 7:46

"User Name" is not a normal column-name, and the space in the name will muck up the command. If that is how the column is actually named, you should add brackets like below;

where [User Name]=@user_name

..and complain loudly about the person who designed the database Smile | :)

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Richard Deeming11-Jul-16 7:47

Richard Deeming

11-Jul-16 7:47

Column names cannot contain spaces. Either rename your column to UserName, or wrap the column name in square brackets:

SQL

Select * FROM tbl_Loging where [User Name]=@user_name and Password=@password

However, you are currently storing your passwords in plain text. That is an extremely bad idea. You should only ever store a salted hash of the password, using a unique salt per record.
Secure Password Authentication Explained Simply[^]
Salted Password Hashing - Doing it Right[^]

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Re: What can be wrong with my code I can't Log In VS2015

Dave Kreskowiak12-Jul-16 2:45