C# 将值从另一个窗体设置为对象

我正在用C语言编写一个WindowsFormProject，其中包含以下代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        Form2 f = new Form2();
        f.Show();
    }
}
}

这是Form1的代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication2
{
public partial class Form2 : Form
{
    public Form2()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        Form1 f1 = new Form1();
        f1.textBox1.Text = "prova";

        f1.Refresh();

    }
}
}

结束这是Form2的代码

目标是在表单1的文本框中写入文本，我将访问修饰符设置为public，但不起作用

有什么解决办法吗？

试试这个

表格2：

public Form _parent;

public Form2(Form Parent)
    {
        InitializeComponent();

        this._parent = Parent;
    }

private void button1_Click(object sender, EventArgs e)
    {
        this._parent.textBox1.Text = "prova";

    }

public Form1 _parent;

public Form2(Form1 parent) //<-- parent is the reference for the first form ("Form1" object)
{
    InitializeComponent();

    this._parent = parent;
}

private void button1_Click(object sender, EventArgs e)
{
    this._parent.textBox1.Text = "prova"; // you won't get an exception here because _parant is from type Form1 and not Form

}

在表格1中：

private void button1_Click(object sender, EventArgs e)
    {
        Form2 f = new Form2(this);
        f.Show();
    }

private void button1_Click(object sender, EventArgs e)
{
    Form2 f = new Form2(this);   //<- "this" is the reference for the current "Form1" object
    f.Show();
}

请注意，在Form2中的“button1_Click”中，您正在创建一个“Form1”的新实例，因此Form2并不真正“知道”已准备好打开的Form1

您应该将此对象引用（Form1）传递给Form2， 与Marcio的解决方案类似，但您应该传递“Form1”，而不是传递继承类“Form”

表格2：

public Form _parent;

public Form2(Form Parent)
    {
        InitializeComponent();

        this._parent = Parent;
    }

private void button1_Click(object sender, EventArgs e)
    {
        this._parent.textBox1.Text = "prova";

    }

public Form1 _parent;

public Form2(Form1 parent) //<-- parent is the reference for the first form ("Form1" object)
{
    InitializeComponent();

    this._parent = parent;
}

private void button1_Click(object sender, EventArgs e)
{
    this._parent.textBox1.Text = "prova"; // you won't get an exception here because _parant is from type Form1 and not Form

}

public Form1\u家长；
public Form2（Form1 parent）//我认为@krillgar的可能重复项不是同一个问题我有以下错误：错误1'System.Windows.Forms.Form'不包含'textBox1'的定义，并且找不到接受'System.Windows.Forms.Form'类型的第一个参数的扩展方法'textBox1'（是否缺少using指令或程序集引用？）c:\users\cristian\documents\visual studio 2013\Projects\WindowsFormsApplication2\WindowsFormsApplication2\Form2.cs 24 26 WindowsFormsApplication2