Question

我有这个代码的按钮：

   private void button22_Click_1(object sender, EventArgs e)
    {
        Separare sp = new Separare(dataGridView1,label_pin.Tag.ToString(),label_pin.Text);
        sp.FormClosed += new FormClosedEventHandler(ClosedForm);
        sp.Show();

    }

FormClosedEventHandler看起来像这样：

   DataTable bon_temp = bon_tempTableAdapter.GetDataByTable(label_pin.Tag.ToString());

        foreach (DataRow row in bon_temp.Rows)
        {
            AddRow(row.ItemArray[3].ToString(), Convert.ToInt32(row.ItemArray[4]), Convert.ToDecimal(row.ItemArray[5]));
            Console.WriteLine(row.ItemArray[3].ToString(), Convert.ToInt32(row.ItemArray[4]), Convert.ToDecimal(row.ItemArray[5]));
        }

        bon_tempTableAdapter.DeleteQuery(label_pin.Tag.ToString());

AddRow方法向DataGridView添加行。我的问题是，当我关闭sp表单时，行不会添加到DataGridView。

Answer 1

每当用户关闭表单时

FormClosed，表单 后并指定关闭原因。

您的代码无法正常工作的原因可能是表单上的某些控件已被销毁...

我建议您使用FormClosing事件，只要用户关闭表单，表单已关闭并指定关闭原因。

示例代码（它与您上面的代码非常相似）：

this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.MyMainForm_FormClosing); ... private void MyMainForm_FormClosing(object sender, FormClosingEventArgs e) { //your code goes here //optionally, you can get or set e.Cancel which gets or sets a value indicating that the event should be cancelled; in this case the form won't close if you cancel it here //or, you can check e.CloseReason which gets a value that indicates why the form is being closed (this is an enum Systems.Windows.Forms.CloseReason) }

在WinForms中处理FormClosed事件

1 个答案: