从Form2向DataGridView（Form1）添加行 [英] Adding row to DataGridView (Form1) from Form2

问题描述

我知道有很多问题，很多答案...但我仍然在努力使这项工作。

OhMyVisitorsMW是我的Form1，FormAddWebsite是我的Form2。

这是Form1的代码：

 code> using System; 
使用System.Windows.Forms; 
 
命名空间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（）; 
} 
} 
} 
  

这里是我的Form2：

  using System; 
使用System.Windows.Forms; 
 
命名空间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（）; 
} 
} 
} 
  

什么是错误？
感谢您的帮助。

解决方案

我更喜欢使用事件处理程序来做这样的事情。阅读以下样品。这不是真实的形式。我刚刚创建了示例类。

  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）
 {
 //使用事件参数中的属性，并以此形式设置数据
} 
 
} 
 
 public class ChildForm：Form 
 {
按钮okButton = new Button（）; 
文本框名称=新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 =新的MyEventArgs（）; 
 
 myEventArgs.Name = name.Text; 
 myEventArgs.Address = address.Text; 
 
 OKButtonClick（sender，myEventArgs）; 
} 
} 
} 
 
 public class MyEventArgs：EventArgs 
 {
 public string Name 
 {
 get ; 
设置; 
} 
 
 public string Address 
 {
 get; 
设置; 
} 
} 
  

I know there are a lot of questions about this, and a lot of answers... but I'm still trying to make this work.

OhMyVisitorsMW is my Form1, FormAddWebsite is my Form2.

Here is the code of my Form1 :

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();
        }
    }
}

And here is the code of my Form2 :

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();
        }
    }
}

What is wrong.. ? Thanks for your help.

解决方案

I prefer using event handlers to do something like this. Read following sample. This is not a real form. I just created sample classes to demonstrate.

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;
    }
}

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