C# 当'；X'；是否单击子窗体？

我只使用C#大约一个星期，对编程基本上还是新手

我有两张表格。在家长表单上，我有两个按钮-添加和编辑。这些按钮打开一个子窗体，该窗体也有两个按钮-保存和取消

当在子表单上单击Cancelled时，我在代码中设置了一个指示符变量，将其标记为true：

//Indicator on child form; setup in properties.
public bool frmCloseInd { get; set; }

在“取消”按钮上设置指示器，以便在单击事件时设置为“真”：

//Cancel Event on child form
private void but_DM_Cancel_Click(object sender, EventArgs e)
{
      frmCloseInd = true;
      Close();
}

frmCloseInd值被传递回表单的父级。运行IF语句以确定要运行的代码。问题是，当单击X时，它仍然运行与保存时相同的代码。单击X时，如何将true传递给frmCloseInd

我尝试执行关闭事件，但它在“保存”和“取消”按钮中的“关闭”（）中启动

以下是父级表单上的添加按钮单击事件：

        private void but_DM_Add_Click(object sender, EventArgs e)
        {
            //instance of child form is called
            frmDirectoryManagerAARecord frm = new frmDirectoryManagerAARecord();
            //Setting properties specific to add button
            frm.Text = "Add Contract";
            frm.ShowDialog(this);

            if (frm.frmCloseInd == true)
            {
                //indicates the user canceled out of the userform. No action performed.
            }
            else
            {
                if (frm.frmAnalytic_ID == 0 || frm.frmClient_ID == 0 || frm.frmProject_ID == 0)
                {
                    MessageBox.Show("Required values were missing. Analytic ID, Client ID and Project ID are required for entry.");
                }
                else
                {
                    MessageBox.Show(frm.frmAnalytic_ID + " " + frm.frmClient_ID + " " + frm.frmProject_ID + " " + frm.frmDescrip);
                    try
                    {
                        string database = "DB_NAME";
                        string query_insert = @"INSERT INTO [dbo].[TestTable] 
                                            (Analytic_ID,   Master_Client_ID,   Project_ID, Description, Active)
                                            VALUES(" + frm.frmAnalytic_ID + ", " + frm.frmClient_ID + ", " + frm.frmProject_ID + ", '" + frm.frmDescrip + "', 1)";
                        //calling instance of class ContractSearch to use method connectToDatabase
                        ContractSearch con = new ContractSearch();
                        con.connectToDatabase(database, query_insert);
                        //reloads gridview on parent form
                        Reload_gvDirectoryManager();
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("Error: " + ex.Message);
                    }
                }
            }
        }

private void but_DM_Save_Click(object sender, EventArgs e)
        {
            try
            {
                frmAnalytic_ID = Convert.ToInt32(tbox_DM_Analytic_ID.Text);
                frmClient_ID = Convert.ToInt32(tbox_DM_Client_ID.Text);
                frmProject_ID = Convert.ToInt32(tbox_DM_Project_ID.Text);
                frmDescrip = tbox_DM_Descrip.Text;
                Close();
            }
            catch(Exception ex)
            {
                MessageBox.Show("Error: " + ex.Message);
            }
        }

以及子窗体上保存按钮的代码：

        private void but_DM_Add_Click(object sender, EventArgs e)
        {
            //instance of child form is called
            frmDirectoryManagerAARecord frm = new frmDirectoryManagerAARecord();
            //Setting properties specific to add button
            frm.Text = "Add Contract";
            frm.ShowDialog(this);

            if (frm.frmCloseInd == true)
            {
                //indicates the user canceled out of the userform. No action performed.
            }
            else
            {
                if (frm.frmAnalytic_ID == 0 || frm.frmClient_ID == 0 || frm.frmProject_ID == 0)
                {
                    MessageBox.Show("Required values were missing. Analytic ID, Client ID and Project ID are required for entry.");
                }
                else
                {
                    MessageBox.Show(frm.frmAnalytic_ID + " " + frm.frmClient_ID + " " + frm.frmProject_ID + " " + frm.frmDescrip);
                    try
                    {
                        string database = "DB_NAME";
                        string query_insert = @"INSERT INTO [dbo].[TestTable] 
                                            (Analytic_ID,   Master_Client_ID,   Project_ID, Description, Active)
                                            VALUES(" + frm.frmAnalytic_ID + ", " + frm.frmClient_ID + ", " + frm.frmProject_ID + ", '" + frm.frmDescrip + "', 1)";
                        //calling instance of class ContractSearch to use method connectToDatabase
                        ContractSearch con = new ContractSearch();
                        con.connectToDatabase(database, query_insert);
                        //reloads gridview on parent form
                        Reload_gvDirectoryManager();
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("Error: " + ex.Message);
                    }
                }
            }
        }

private void but_DM_Save_Click(object sender, EventArgs e)
        {
            try
            {
                frmAnalytic_ID = Convert.ToInt32(tbox_DM_Analytic_ID.Text);
                frmClient_ID = Convert.ToInt32(tbox_DM_Client_ID.Text);
                frmProject_ID = Convert.ToInt32(tbox_DM_Project_ID.Text);
                frmDescrip = tbox_DM_Descrip.Text;
                Close();
            }
            catch(Exception ex)
            {
                MessageBox.Show("Error: " + ex.Message);
            }
        }

---

解决问题的最简单方法是将

frmCloseInd

属性的初始值设置为

true

：

// Default value TRUE for this property indicates that by default we mean
// that the form will be closed using Cancel or X button. If user clicks
// Save button then we set this property to FALSE.
public bool frmCloseInd { get; set; } = true;

此外，我们应该在

Save

和

Close

事件处理程序中为此属性设置适当的值（如果您有

FormClose

事件处理程序，则不能更改其中属性

frmCloseInd

的值）：

---

作为旁注，我想指出，要在WinForms中实现此类功能，最好使用。

请参阅我的双表单项目：