C# 如何从Form2按钮单击事件调用Form1加载事件

我有两个简单的windows窗体：FormA和FormB。 在my FormA中有一个简单的datagridView，我显示my simple table信息，我使用此代码在FormA load事件中显示my信息：

当信息显示在datagridView中并且用户单击gridView行时，打开FormB并在FormB文本框中显示datagridView字段，在FormB中，我使用以下代码：

要更新我的简单表格，但我想在FormA datagridView刷新中单击FormB上的“更新”按钮时，如何执行此操作？

可能重复的

public partial class FirstForm: Form
{
public FirstForm()
{
    InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
    SecondForm form2 = new SecondForm (this);
    SecondForm .Show();
}
public void UpdateDataGrid()
{
//add your code here
}



}

public partial class SecondForm : Form
{
private FirstForm form1;

public SecondForm ()
{
    InitializeComponent();
}

public SecondForm (FirstForm form1)
    : this()
{

    this.form1 = form1;
}

private void button1_Click(object sender, EventArgs e)
{
    form1.UpdateDataGrid();
}
}

SqlCeConnection connection = new SqlCeConnection(conString);
                connection.Open();
                SqlCeCommand cmd = new SqlCeCommand("Update WhiteList set Name=@behi,Count=@rezi where id=@rezii", connection);
                cmd.Parameters.AddWithValue("@behi", textBox1.Text);
                cmd.Parameters.AddWithValue("@rezi", Convert.ToInt32(textBox2.Text));
                cmd.Parameters.AddWithValue("@rezii", Convert.ToInt32(label1.Text));
                cmd.ExecuteNonQuery();

public partial class FirstForm: Form
{
public FirstForm()
{
    InitializeComponent();
}

private void button1_Click(object sender, EventArgs e)
{
    SecondForm form2 = new SecondForm (this);
    SecondForm .Show();
}
public void UpdateDataGrid()
{
//add your code here
}



}

public partial class SecondForm : Form
{
private FirstForm form1;

public SecondForm ()
{
    InitializeComponent();
}

public SecondForm (FirstForm form1)
    : this()
{

    this.form1 = form1;
}

private void button1_Click(object sender, EventArgs e)
{
    form1.UpdateDataGrid();
}
}