如何将选定的颜色从Form2发送到Form1

Question

I have a Form1 with MenuItem 'Customize'. On clicking customize, I open 'Form2'. On Form2 , user selects two colors from ColorDialog. Form2 has 'Apply' button. I want on clicking 'Apply' button, Form2 should close(or Hide) and the chosen colors should be applied (painted) as backround color of Form1. How do I do this?

Answer 1

您在form1中创建一个公共方法“ selectcolor（）”，关闭所有窗体，打开一个新的form1并使用selectcolor（）选择颜色

Answer 2

When you click the button to open form 2 do it like this:

 Form2 f = new Form2();
 f.ShowDialog();
 var returnedColor = f.SelectedColor;

This will interupt the code in form1 so you cannot make changes there, and you return the value from the form.

public class Form2{
  public string SelectedColor = "Test";
}

This should work.

Answer 3

In form 2 you need to have two properties that you can access to retrieve the colours

public Color FirstColor {get; private set;}
public Color SecondColor {get; private set;}

Then to open this form you should use something along the following.

using(var myForm = new Form2())
{
    myForm.ShowDialog();
    //if(myForm.ShowDialog() == DialogResult.OK)
        this.BackColor = myForm.FirstColor;
}

The commented line is an optional thing that you can introduce instead of the line above it if you have an ok/cancel button on your dialog. To close the form you should set the forms DialogResult appropriately

Answer 4

you can use static variables like this: in Form1:

Public Static Color SelectedColor;
Form1 f1 = new Form1();
f1.ShowDialog();
this.BackColor = SelectedColor;

in Form2:

if(ColoeDialog1.ShowDialog()==DialogResault.OK)
{
Form1.SelectedColor = ColoeDialog1.SelectedColor;
}