Question

我知道有很多关于此的问题，以及很多答案......但我仍然在尝试做这项工作。

OhMyVisitorsMW是我的Form1，FormAddWebsite是我的Form2。

以下是我的Form1的代码：

using System;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class OhMyVisitorsMW : Form
    {
        private int nbroflinksadded = -1;
        FormAddWebsite FormAddWebsite = new FormAddWebsite();

        public OhMyVisitorsMW()
        {
            InitializeComponent();
        }

        private void OHMyVisitorsMW_Load(object sender, EventArgs e)
        {
            dataGridView1.Rows.Add(1);
        }

        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {
            if (e.ColumnIndex == 3)
            {
                if (e.RowIndex == nbroflinksadded+1)
                {
                    FormAddWebsite.ShowDialog();
                }  
                else
                {
                    contextMenuStrip2.Show(MousePosition.X, MousePosition.Y); 
                }
            }
        }

        public void AddSite(string nomsite, string urlsite)
        {
            dataGridView1.Rows.Add(nomsite, urlsite);
            dataGridView1.Update();
            dataGridView1.Refresh();
        }
    }
}

这是我的Form2的代码：

using System;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
    public partial class FormAddWebsite : Form
    {
        public static string nomsite;
        public static string urlsite;

        public FormAddWebsite()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            OhMyVisitorsMW MainForm = new OhMyVisitorsMW();
            nomsite = textBox1.Text;
            urlsite = textBox2.Text;
            MainForm.AddSite(nomsite, urlsite);

            this.Close();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}

有什么问题？谢谢你的帮助。

Answer 1

每次点击按钮，您都会将网站详细信息添加到OhMyVisitorsMW的新实例。

OhMyVisitorsMW MainForm = new OhMyVisitorsMW();
nomsite = textBox1.Text;
urlsite = textBox2.Text;
MainForm.AddSite(nomsite, urlsite);

您已将数据返回到显示FormAddWebsite.ShowDialog();的实例。这可以通过多种方式实现。

在显示对话框之前和button_click处理程序

中设置FormAddWebsite.Parent = this

OhMyVisitorsMW MainForm = Parent as OhMyVisitorsMW();

或者在FormAddWebsite中添加公共属性以获取输入的数据，并在AddSite之后使用这些公共属性中的数据调用FormAddWebsite.ShowDialog();。

Answer 2

我更喜欢使用事件处理程序来做这样的事情。阅读以下示例。这不是一个真实的形式。我刚刚创建了示例类来演示。

public class ParentForm : Form
{
    Button openButton = new Button();

    public ParentForm()
    {
        openButton.Click += openButton_Click;
    }

    void openButton_Click(object sender, EventArgs e)
    {
        ChildForm childForm = new ChildForm();
        childForm.OKButtonClick += childForm_OKButtonClick;
        childForm.ShowDialog();
    }

    void childForm_OKButtonClick(object sender, MyEventArgs e)
    {
        // Use properties from event args and set data in this form
    }

}

public class ChildForm : Form
{
    Button okButton = new Button();
    TextBox name = new TextBox();
    TextBox address = new TextBox();

    public event EventHandler<MyEventArgs> OKButtonClick;

    public ChildForm()
    {
        okButton.Click += okButton_Click;
    }

    void okButton_Click(object sender, EventArgs e)
    {
        if (OKButtonClick != null)
        {
            MyEventArgs myEventArgs = new MyEventArgs();

            myEventArgs.Name = name.Text;
            myEventArgs.Address = address.Text;

            OKButtonClick(sender, myEventArgs);
        }
    }
}

public class MyEventArgs : EventArgs
{
    public string Name
    {
        get;
        set;
    }

    public string Address
    {
        get;
        set;
    }
}

从Form2向DataGridView（Form1）添加行

2 个答案: