WPF Open New Form problem

Question

0.00/5 (No votes)

See more:

VS2012

A WPF Form, I use C#;

I have a window named "MainWindow_1" and another named"MainWindow_2",

in MainWindow_1 I have a button to open "MainWindow_2". My codes are:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using DevExpress.Xpf.Core;
using DevExpress.Xpf.Ribbon;
using DevExpress.Xpf.Bars;
using namespace.DXWPFApplication3;

namespace DXWPFApplication16 
 
{
    public partial class MainWindow_1 : DXRibbonWindow
    {
        public MainWindow_1()
        {
            InitializeComponent();

        }

        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            

        }

        private void Button_Click_2(object sender, RoutedEventArgs e)
        {

           MainWindow_2 win2 = new MainWindow_2.Show();
           win2.Show();
//I want this button opens another WPF form (which namespace DXWPFApplication3)//
            

        }

    }


}
();

But VS2012, underlines "MainWindow_2" word.It says "Type or namespace couldn't be found"

How can i solve it?

Thanks.

Posted 5-Feb-13 4:44am

Hslldm

Updated 5-Feb-13 7:15am

v3

Add a Solution

2 solutions

Solution 2

Just press Ctrl + . on MainWindow_2 in the line MainWindow_2 win2 = new MainWindow_2();
It will resolve your name space (if the dll is already part of the project).

Posted 5-Feb-13 5:08am

Abhinav S

Comments

Hslldm 5-Feb-13 11:13am

It didn't work

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Pete O'Hanlon · Accepted Answer · 2013-02-05T04:56:00

Solution 1

You need to add a reference to the namespace that MainWindow_2 is in to the code for MainWindow_1. If MainWindow_2 is in a separate assembly, you may need to reference that assembly as well.

[OP has updated question with code]
MainWindow_2 win2 = new MainWindow_2.Show()

Should be

MainWindow_2 win2 = new MainWindow_2().Show()

Posted 5-Feb-13 4:56am

Pete O'Hanlon

Updated 5-Feb-13 7:20am

v2

Comments

Hslldm 5-Feb-13 11:00am

I am new at C#, could you tell me have to do that

Thanks.(It's in the same assembly)

Pete O'Hanlon 5-Feb-13 11:30am

At the top of the code behind (I'm assuming you aren't doing this via MVVM), type in "using Namespace_That_MainWindow_2_Resides_In;" (without the quotes). Obviously you'd replace that namespace text with the actual namespace that MainWindow_2 resides in.

Hslldm 5-Feb-13 12:06pm

I wrote this:
---------------------------------------------
using Namespace_that_MainWindow_2_Resides_In;
---------------------------------------------

But it didn't accept it. I tried this then;
-----------------------------------
using namespace.DXWPFApplication3;
-----------------------------------

Now VS accepts the MainWindow_2(Remove the red underlines), but now doesn't
accept "namespace" word in the using place. Says "identifier expected, namespace is a keyword".

What should i do?
Thank you very much.

Pete O'Hanlon 5-Feb-13 12:47pm

In the code behind, you don't need to use namespace in the using statement. So, in this case, you'd use: using DXWPFApplication3;

Hslldm 5-Feb-13 12:53pm

Nope, it didnt work. underlined "DXWPFApplication3;"

Pete O'Hanlon 5-Feb-13 13:00pm

As we can't see your code, we can only guess here. Why don't you actually post some of your code? Give us the namespace and class declarations, and give us the button code - we might have a better idea then.

Hslldm 5-Feb-13 13:16pm

I added the code.

Pete O'Hanlon 5-Feb-13 13:20pm

I've updated my answer.

Hslldm 5-Feb-13 13:43pm

I accept the code but doesn't accept the namespace...(says" identifier expected,namespace is a keyword)...How do i identify it?

Hslldm 5-Feb-13 13:48pm

When I tried
----------
using DXWPFApplication3;
----------
says "could not be found".....

Pete O'Hanlon 5-Feb-13 14:07pm

Is MainWindow_2 in a namespace called DXWPFApplication3? Drop this line and try compiling it up.

Hslldm 5-Feb-13 14:16pm

Yes it is in DXWPFApplication3. I dropped. Still not working.

Pete O'Hanlon 5-Feb-13 14:19pm

Try this then: DXWPFApplication3.MainWindow_2 win2 = new DXWPFApplication3.MainWindow_2().Show();

Hslldm 5-Feb-13 14:46pm

says..."Could not be found" .In the project folder. Those two
in different folders. Can it be because of that?

Pete O'Hanlon 5-Feb-13 14:50pm

Remember that bit where I asked you if they were in the same assembly? That's what I was on about. Add the other assembly in as a reference to the main application.

Hslldm 5-Feb-13 14:56pm

How can i add it?

Pete O'Hanlon 5-Feb-13 15:00pm

Right click on the project in the Solution Explorer, select Add Reference and choose Assemblies - then pick the relevant project. May I also suggest that you buy a book on programming .NET? Seriously, this is basic stuff.

Hslldm 5-Feb-13 15:15pm

It worked!, Thanks. Sorry, i started to learn c# this week and i couldn't find a good source.

Pete O'Hanlon 5-Feb-13 15:17pm

I'm glad it worked, but if you're only starting to learn C#, I would start with something simpler than WPF.

Hslldm 5-Feb-13 15:23pm

Is it too hard?, I have an homework. A form can perform matrix multipication. Will it be too hard?

Pete O'Hanlon 5-Feb-13 15:25pm

For a newcomer? Yes. Put it this way, I've been a professional programmer for the last 25+ years, and I found WPF to be hard when I got into it 5 years ago.