如何在C＃中从Form1启动Form2？

Question

OK, I am about 1 week into programming in C# ever... I am writing a GUI application that has two forms. Form1 is the main form, and have quite a bit of codes that are working nicely. Form2 is supposed to be launched, when Form1 is handling exception..

Form1 and Form2 are both created in VS Solution Explorer, so they are not code created on the fly.

In Form1.cs ...

namespace Launcher
{
    public partial class Form1: Form  
    {  
        // ...  
        private void button2_Click(object sender, EventArgs e)
        {
            try  
            {  
                //some codes  
            }  
            catch (SomeException)  
            {  
                Form Form2 = new Form();  
                Form2.Show();  
            }
        }
    }
}

In addition .. in Program.cs ..

using System.Windows.Forms;  

namespace LauncherCSharp  
{
    static class Program  
    {
    /// <summary>  
    /// The main entry point for the application.  
    /// </summary>  

        static void Main()  
        {  
            Application.EnableVisualStyles();  
            Application.SetCompatibleTextRenderingDefault(false);  
            Application.Run(new Form1());  
        }
    }
}

Problem is .. Form2.Show() will pop up a brand new Form2 , and not the one I've defined in Solution Explorer. I think this is related to the new Form() line above, but if I don't have this new Form() line, the compiler complained about Form2.Show() ..Cannot access non-static method "show" in static context.

Any ideas?

Answer 1

You aren't actually creating Form2

Your code

Form Form2 = new Form();

Should probably be

Form2 form2 = new Form2();

or replace Form2 with the actual name of your form2.

In C#, we create an instances of an object (in your case the object is the form) by the following syntax

ObjectName yourVariableName = new ObjectName();

We can then refer to this object by using the "yourVariableName". eg

yourVariableName.Show(); // Show the form