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C#通過子窗體刷新父窗體的實(shí)現(xiàn)方法

 更新時(shí)間：2024年04月26日 11:08:14   作者：wenchm  
在一些軟件,比如,進(jìn)銷存管理系統(tǒng)中添加銷售單信息時(shí),每個(gè)銷售單都可能對(duì)應(yīng)多種商品,而且在向銷售單中添加商品時(shí),一般都是在新彈出的窗體中選擇商品,這時(shí)就涉及通過子窗體刷新父窗體的問題,本文給大家介紹了C#通過子窗體刷新父窗體的實(shí)現(xiàn)方法,需要的朋友可以參考下

1、實(shí)現(xiàn)方法 

實(shí)現(xiàn)通過子窗體刷新父窗體時(shí)，主要通過在自定義事件中執(zhí)行數(shù)據(jù)綁定來對(duì)主窗體進(jìn)行刷新，即當(dāng)子窗體產(chǎn)生更新操作時(shí)，通過子窗體的一個(gè)方法觸發(fā)主窗體中對(duì)應(yīng)的事件，這個(gè)過程主要用到了EventHandler事件。

EventHandler事件主要是通過EventHandler委托來實(shí)現(xiàn)的，該委托表示處理不包含事件數(shù)據(jù)的事件的方法。語法格式如下：

public delegate void EventHandler(Object sender,EventArgs e)
參數(shù)說明
Sender：事件源。
e：不包含任何事件數(shù)據(jù)的EventArgs事件數(shù)據(jù)。

例如，通過使用EventHandler事件為子窗體添加一個(gè)事件處理程序，以便能夠刷新父窗體中的數(shù)據(jù)。

在子窗體里：

/// <summary>
/// 某一個(gè)事件，比如，添加
/// </summary>
private void Button1_Click(object? sender, EventArgs e)
{
    GlobalFlag = true;                          //設(shè)定標(biāo)識(shí)的值為true
    if (!(comboBox1.Items.Equals(idContent)))   //當(dāng)Combobox控件中不存在將添加的信息時(shí)
    {
        comboBox1.Items.Add(idContent!);        //在Combobox控件中添加一條記錄
    }
    UpdateData();
}
 
// 其它
 
/// <summary>
/// 更新DataGridView控件中的內(nèi)容
/// </summary>
protected void UpdateData()
{
    UpdateDataGridView?.Invoke(this, EventArgs.Empty);
}

在主窗體里：

// 添加子窗體的事件
public void CreateFrmChild()
{
    Frm_Child BabyWindow = new()
    {
        MdiParent = this,
    };
    dataGridView1.Controls.Add(BabyWindow);
    BabyWindow.UpdateDataGridView += new EventHandler(BabyWindow_UpdateDataGridView!);
    BabyWindow.Show();
}
 
// 其它
 
/// <summary>
/// 實(shí)現(xiàn)事件委托
/// </summary>
void BabyWindow_UpdateDataGridView(object sender, EventArgs e)
{
    // 其它
}

2.SqlCommand類

本實(shí)例中使用了SQL，主窗體的數(shù)據(jù)讀取自SQL，在子窗體里更新，然后回寫SQL，其結(jié)果再次更新到主窗體。

在C#中執(zhí)行SQL語句時(shí)，可以使用SqlCommand類，該類主要用于向SQL Server數(shù)據(jù)庫發(fā)送SQL語句。

本實(shí)例的數(shù)據(jù)庫連接字符串：

//數(shù)據(jù)庫連接字符串
readonly string? ConnString = "Data Source=DESKTOP-3LV13FS;DataBase=db_TomeOne;integrated security=SSPI;TrustServerCertificate=true;";

還有，在.NET 8.0中，要使用命名空間：using Microsoft.Data.SqlClient;因?yàn)?using System.Data.SqlClient; 已經(jīng)廢棄。

3.實(shí)例的主窗體Frm_Main： 

（1）Frm_Main.Designer.cs

namespace _197
{
    partial class Frm_Main
    {
        /// <summary>
        ///  Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;
 
        /// <summary>
        ///  Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }
 
        #region Windows Form Designer generated code
 
        /// <summary>
        ///  Required method for Designer support - do not modify
        ///  the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            menuStrip1 = new MenuStrip();
            toolStripMenuItem1 = new ToolStripMenuItem();
            toolStripMenuItem2 = new ToolStripMenuItem();
            toolStripMenuItem3 = new ToolStripMenuItem();
            dataGridView1 = new DataGridView();
            menuStrip1.SuspendLayout();
            ((System.ComponentModel.ISupportInitialize)dataGridView1).BeginInit();
            SuspendLayout();
            // 
            // menuStrip1
            // 
            menuStrip1.BackColor = SystemColors.ControlDark;
            menuStrip1.Items.AddRange(new ToolStripItem[] { toolStripMenuItem1 });
            menuStrip1.Location = new Point(0, 0);
            menuStrip1.Name = "menuStrip1";
            menuStrip1.Size = new Size(335, 25);
            menuStrip1.TabIndex = 0;
            menuStrip1.Text = "menuStrip1";
            // 
            // toolStripMenuItem1
            // 
            toolStripMenuItem1.DropDownItems.AddRange(new ToolStripItem[] { toolStripMenuItem2, toolStripMenuItem3 });
            toolStripMenuItem1.Name = "toolStripMenuItem1";
            toolStripMenuItem1.Size = new Size(44, 21);
            toolStripMenuItem1.Text = "操作";
            // 
            // toolStripMenuItem2
            // 
            toolStripMenuItem2.Name = "toolStripMenuItem2";
            toolStripMenuItem2.Size = new Size(136, 22);
            toolStripMenuItem2.Text = "添加或刪除";
            toolStripMenuItem2.Click += ToolStripMenuItem2_Click;
            // 
            // toolStripMenuItem3
            // 
            toolStripMenuItem3.Name = "toolStripMenuItem3";
            toolStripMenuItem3.Size = new Size(136, 22);
            toolStripMenuItem3.Text = "退出";
            toolStripMenuItem3.Click += ToolStripMenuItem3_Click;
            // 
            // dataGridView1
            // 
            dataGridView1.AllowUserToAddRows = false;
            dataGridView1.ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            dataGridView1.Dock = DockStyle.Fill;
            dataGridView1.Location = new Point(0, 25);
            dataGridView1.Name = "dataGridView1";
            dataGridView1.Size = new Size(335, 178);
            dataGridView1.TabIndex = 1;
            // 
            // Frm_Main
            // 
            AutoScaleDimensions = new SizeF(7F, 17F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(335, 203);
            Controls.Add(dataGridView1);
            Controls.Add(menuStrip1);
            IsMdiContainer = true;
            MainMenuStrip = menuStrip1;
            Name = "Frm_Main";
            Text = "主窗體";
            Load += Frm_Main_Load;
            menuStrip1.ResumeLayout(false);
            menuStrip1.PerformLayout();
            ((System.ComponentModel.ISupportInitialize)dataGridView1).EndInit();
            ResumeLayout(false);
            PerformLayout();
        }
 
        #endregion
 
        private MenuStrip menuStrip1;
        private ToolStripMenuItem toolStripMenuItem1;
        private ToolStripMenuItem toolStripMenuItem2;
        private ToolStripMenuItem toolStripMenuItem3;
        private DataGridView dataGridView1;
    }
}

（2）Frm_Main.cs

// 通過子窗體刷新父窗體
// 設(shè)置主窗體的IsMdiContainer=true;
using System.Data;
using Microsoft.Data.SqlClient;
 
namespace _197
{
    public partial class Frm_Main : Form
    {   
        public Frm_Main()
        {
            InitializeComponent();
        }
 
        #region 聲明的變量
        private static bool flag = false;   //標(biāo)識(shí)是否創(chuàng)建新的子窗體
        readonly Frm_Child BabyWindow = new();//實(shí)例化一個(gè)子窗體
        readonly DataSet PubsSet = new();   //定義一個(gè)數(shù)據(jù)集對(duì)象
        private static string[]? iDArray;   //聲明一個(gè)一維字符串?dāng)?shù)組
        public DataTable? IDTable;          //聲明一個(gè)數(shù)據(jù)表對(duì)象
        SqlDataAdapter? IDAdapter;          //聲明一個(gè)數(shù)據(jù)讀取器對(duì)象
        SqlDataAdapter? PubsAdapter;        //聲明一個(gè)數(shù)據(jù)讀取器對(duì)象
        SqlConnection? ConnPubs;            //聲明一個(gè)數(shù)據(jù)庫連接對(duì)象
        SqlCommand? PersonalInformation;    //聲明一個(gè)執(zhí)行SQL語句的對(duì)象
 
        public static string[]? IDArray { get => iDArray; set => iDArray = value; }
        public static bool Flag { get => flag; set => flag = value; }
        
        readonly string? ConnString         //數(shù)據(jù)庫連接字符串
            = "Data Source=DESKTOP-3LV13FS;DataBase=db_TomeOne;integrated security=SSPI;TrustServerCertificate=true;";
        #endregion
 
        private void Frm_Main_Load(object? sender, EventArgs e)
        {
            string AdapterString = "select userID as 編號(hào),userName as 姓名 ,phone as 電話,address as 住址 from tb_User";//用于查詢的字符串
            string IDString = "select userID from tb_User";//讀取數(shù)據(jù)庫中用戶的ID編號(hào)字符串
            ConnPubs = new SqlConnection(ConnString);//建立數(shù)據(jù)庫連接
            PubsAdapter = new SqlDataAdapter(AdapterString, ConnPubs);//創(chuàng)建PubsAdapter數(shù)據(jù)讀取器
            IDAdapter = new SqlDataAdapter(IDString, ConnPubs);       //用于讀取用戶編號(hào)的讀取器
            PubsAdapter.Fill(PubsSet, "tb_User");            //填充PubsSet數(shù)據(jù)集
            IDAdapter.Fill(PubsSet, "ID");                   //填充PubsSet數(shù)據(jù)集
            DataTable PubsTable = PubsSet.Tables["tb_User"]!;//將數(shù)據(jù)寫入PubsTable表
            IDTable = PubsSet.Tables["ID"]!;                 //將數(shù)據(jù)寫入ID表
            IDArray = new string[IDTable.Rows.Count];        //為數(shù)組定義最大長度
            dataGridView1.DataSource = PubsTable.DefaultView;//設(shè)置dataGridView1的數(shù)據(jù)源
            for (int i = 0; i < IDTable.Rows.Count; i++)     //循環(huán)遍歷數(shù)據(jù)表中的每一行數(shù)據(jù)
            {
                for (int j = 0; j < IDTable.Columns.Count; j++)//循環(huán)遍歷數(shù)據(jù)表中的每一列數(shù)據(jù)
                {
                    IDArray[i] = IDTable.Rows[i][j].ToString()!;//將數(shù)據(jù)表中的數(shù)據(jù)添加至一個(gè)一維數(shù)組
                }
            }
        }
 
        #region 創(chuàng)建子窗體的CreateFrmChild方法
        /// <summary>
        /// 設(shè)置子窗體的父窗體為當(dāng)前窗體;
        /// 實(shí)例化一個(gè)子窗體;
        /// 在DataGridView控件中添加子窗體;
        /// 顯示子窗體;
        /// </summary>
        public void CreateFrmChild()
        {
            Frm_Child BabyWindow = new()
            {
                MdiParent = this,
            };
            dataGridView1.Controls.Add(BabyWindow);
            BabyWindow.UpdateDataGridView += new EventHandler(BabyWindow_UpdateDataGridView!);
            BabyWindow.Show();
        }
        /// <summary>
        /// 事件委托
        /// </summary>
        void BabyWindow_UpdateDataGridView(object sender, EventArgs e)
        {
            if (Frm_Child.GlobalFlag == false)    //當(dāng)單擊刪除按鈕時(shí)
            {
                if (ConnPubs!.State == ConnectionState.Closed) //當(dāng)數(shù)據(jù)庫處于斷開狀態(tài)時(shí)
                {
                    ConnPubs.Open();              //打開數(shù)據(jù)庫的連接
                }
                string AfreshString = "delete tb_User where userID=" + Frm_Child.DeleteID!.Trim();//定義一個(gè)刪除數(shù)據(jù)的字符串
                PersonalInformation = new SqlCommand(AfreshString, ConnPubs); //執(zhí)行刪除數(shù)據(jù)庫字段
                PersonalInformation.ExecuteNonQuery(); //執(zhí)行SQL語句并返回受影響的行數(shù)
                ConnPubs.Close();                      //關(guān)閉數(shù)據(jù)庫
                DisplayData();                         //顯示數(shù)據(jù)庫更新后的內(nèi)容
                MessageBox.Show("數(shù)據(jù)刪除成功！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
            }
            else
            {
                if (ConnPubs!.State == ConnectionState.Closed) //當(dāng)數(shù)據(jù)庫處于關(guān)閉狀態(tài)時(shí)
                {
                    ConnPubs.Open();    //打開數(shù)據(jù)庫
                }
                string InsertString = "insert into tb_User values('" + Frm_Child.IdContent + "','" + Frm_Child.NameContent + "','" + Frm_Child.PhoneContent + "','" + Frm_Child.AddressContent + "')";//定義一個(gè)插入數(shù)據(jù)的字符串變量
                PersonalInformation = new SqlCommand(InsertString, ConnPubs);//執(zhí)行插入數(shù)據(jù)庫字段
                PersonalInformation.ExecuteNonQuery();          //執(zhí)行SQL語句并返回受影響的行數(shù)
                ConnPubs.Close();        //關(guān)閉數(shù)據(jù)庫
                DisplayData();           //顯示更新后的數(shù)據(jù)
                MessageBox.Show("數(shù)據(jù)添加成功！", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
            }
        }
        #endregion
 
        #region 用于讀取數(shù)據(jù)庫的DisplayData方法
        public void DisplayData()
        {
            PubsSet.Clear();
            ConnPubs = new SqlConnection(ConnString); 
            string DisplayString = "select userId as 編號(hào),userName as 姓名 ,phone as 電話,address as 住址 from tb_User";//定義讀取數(shù)據(jù)庫的字段
            SqlDataAdapter PersonalAdapter = new(DisplayString, ConnPubs);    //定義一個(gè)讀取數(shù)據(jù)庫數(shù)據(jù)的讀取器
            PersonalAdapter.Fill(PubsSet, "tb_User");                                            //向表DisplayTable中填充數(shù)據(jù)
            dataGridView1.DataSource = PubsSet.Tables["tb_User"]!.DefaultView; //設(shè)定DataGridView控件的數(shù)據(jù)源
        }
        #endregion
        /// <summary>
        /// 添加或刪除記錄
        /// 創(chuàng)建子窗體的CreateFrmChild方法
        /// </summary>
        private void ToolStripMenuItem2_Click(object sender, EventArgs e)
        {
            if (flag == false)   //判斷標(biāo)識(shí)的值決定是否創(chuàng)建窗體
            {
                CreateFrmChild();//創(chuàng)建子窗體
            }
            for (int i = 0; i < dataGridView1.Controls.Count; i++)                      //循環(huán)遍歷DataGridView控件上的控件集
            {
                if (dataGridView1.Controls[i].Name.Equals(BabyWindow.Name)) //當(dāng)存在子窗體時(shí)
                {
                    flag = true; //改變標(biāo)識(shí)Flag的值
                    break;       //退出循環(huán)體
                }
            }
        }
        /// <summary>
        /// 退出
        /// </summary>
        private void ToolStripMenuItem3_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
    }
}

4.實(shí)例的子窗體Frm_Child： 

（1） Frm_Child.Designer.cs

namespace _197
{
    partial class Frm_Child
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.IContainer components = null;
 
        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }
 
        #region Windows Form Designer generated code
 
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            groupBox1 = new GroupBox();
            button2 = new Button();
            button1 = new Button();
            Record_Address = new TextBox();
            Record_Phone = new TextBox();
            Record_Name = new TextBox();
            Record_ID = new TextBox();
            label4 = new Label();
            label3 = new Label();
            label2 = new Label();
            label1 = new Label();
            groupBox2 = new GroupBox();
            button3 = new Button();
            comboBox1 = new ComboBox();
            label5 = new Label();
            groupBox1.SuspendLayout();
            groupBox2.SuspendLayout();
            SuspendLayout();
            // 
            // groupBox1
            // 
            groupBox1.Controls.Add(button2);
            groupBox1.Controls.Add(button1);
            groupBox1.Controls.Add(Record_Address);
            groupBox1.Controls.Add(Record_Phone);
            groupBox1.Controls.Add(Record_Name);
            groupBox1.Controls.Add(Record_ID);
            groupBox1.Controls.Add(label4);
            groupBox1.Controls.Add(label3);
            groupBox1.Controls.Add(label2);
            groupBox1.Controls.Add(label1);
            groupBox1.Location = new Point(12, 12);
            groupBox1.Name = "groupBox1";
            groupBox1.Size = new Size(270, 157);
            groupBox1.TabIndex = 0;
            groupBox1.TabStop = false;
            groupBox1.Text = "添加信息";
            // 
            // button2
            // 
            button2.Location = new Point(187, 56);
            button2.Name = "button2";
            button2.Size = new Size(75, 23);
            button2.TabIndex = 9;
            button2.Text = "清空";
            button2.UseVisualStyleBackColor = true;
            button2.Click += Button2_Click;
            // 
            // button1
            // 
            button1.Location = new Point(187, 25);
            button1.Name = "button1";
            button1.Size = new Size(77, 23);
            button1.TabIndex = 8;
            button1.Text = "提交";
            button1.UseVisualStyleBackColor = true;
            button1.Click += Button1_Click;
            // 
            // Record_Address
            // 
            Record_Address.Location = new Point(72, 118);
            Record_Address.Name = "Record_Address";
            Record_Address.Size = new Size(100, 23);
            Record_Address.TabIndex = 7;
            Record_Address.TextChanged += Record_Address_TextChanged;
            // 
            // Record_Phone
            // 
            Record_Phone.Location = new Point(72, 87);
            Record_Phone.Name = "Record_Phone";
            Record_Phone.Size = new Size(100, 23);
            Record_Phone.TabIndex = 6;
            Record_Phone.TextChanged += Record_Phone_TextChanged;
            // 
            // Record_Name
            // 
            Record_Name.Location = new Point(72, 56);
            Record_Name.Name = "Record_Name";
            Record_Name.Size = new Size(100, 23);
            Record_Name.TabIndex = 5;
            Record_Name.TextChanged += Record_Name_TextChanged;
            // 
            // Record_ID
            // 
            Record_ID.Location = new Point(72, 25);
            Record_ID.Name = "Record_ID";
            Record_ID.Size = new Size(100, 23);
            Record_ID.TabIndex = 4;
            Record_ID.TextChanged += Record_ID_TextChanged;
            // 
            // label4
            // 
            label4.AutoSize = true;
            label4.Location = new Point(11, 118);
            label4.Name = "label4";
            label4.Size = new Size(44, 17);
            label4.TabIndex = 3;
            label4.Text = "地址：";
            // 
            // label3
            // 
            label3.AutoSize = true;
            label3.Location = new Point(11, 87);
            label3.Name = "label3";
            label3.Size = new Size(44, 17);
            label3.TabIndex = 2;
            label3.Text = "電話：";
            // 
            // label2
            // 
            label2.AutoSize = true;
            label2.Location = new Point(11, 56);
            label2.Name = "label2";
            label2.Size = new Size(44, 17);
            label2.TabIndex = 1;
            label2.Text = "姓名：";
            // 
            // label1
            // 
            label1.AutoSize = true;
            label1.Location = new Point(11, 25);
            label1.Name = "label1";
            label1.Size = new Size(44, 17);
            label1.TabIndex = 0;
            label1.Text = "編號(hào)：";
            // 
            // groupBox2
            // 
            groupBox2.Controls.Add(button3);
            groupBox2.Controls.Add(comboBox1);
            groupBox2.Controls.Add(label5);
            groupBox2.Location = new Point(12, 175);
            groupBox2.Name = "groupBox2";
            groupBox2.Size = new Size(270, 54);
            groupBox2.TabIndex = 1;
            groupBox2.TabStop = false;
            groupBox2.Text = "刪除信息";
            // 
            // button3
            // 
            button3.Location = new Point(187, 24);
            button3.Name = "button3";
            button3.Size = new Size(75, 23);
            button3.TabIndex = 2;
            button3.Text = "刪除";
            button3.UseVisualStyleBackColor = true;
            button3.Click += Button3_Click;
            // 
            // comboBox1
            // 
            comboBox1.FormattingEnabled = true;
            comboBox1.Location = new Point(72, 24);
            comboBox1.Name = "comboBox1";
            comboBox1.Size = new Size(100, 25);
            comboBox1.TabIndex = 1;
            // 
            // label5
            // 
            label5.AutoSize = true;
            label5.Location = new Point(11, 30);
            label5.Name = "label5";
            label5.Size = new Size(44, 17);
            label5.TabIndex = 0;
            label5.Text = "編號(hào)：";
            // 
            // Frm_Child
            // 
            AutoScaleDimensions = new SizeF(7F, 17F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(294, 241);
            Controls.Add(groupBox2);
            Controls.Add(groupBox1);
            MaximizeBox = false;    //最大化按鈕沒有意義
            Name = "Frm_Child";
            StartPosition = FormStartPosition.CenterScreen;
            Text = "子窗體";
            FormClosing += Frm_Child_FormClosing;
            Load += Frm_Child_Load;
            groupBox1.ResumeLayout(false);
            groupBox1.PerformLayout();
            groupBox2.ResumeLayout(false);
            groupBox2.PerformLayout();
            ResumeLayout(false);
        }
 
        #endregion
 
        private GroupBox groupBox1;
        private TextBox Record_Address;
        private TextBox Record_Phone;
        private TextBox Record_Name;
        private TextBox Record_ID;
        private Label label4;
        private Label label3;
        private Label label2;
        private Label label1;
        private GroupBox groupBox2;
        private Button button2;
        private Button button1;
        private Button button3;
        private ComboBox comboBox1;
        private Label label5;
    }
}

（2）Frm_Child.cs

// 本實(shí)例僅可創(chuàng)建一個(gè)窗口:
// 最大化后沒有實(shí)際意義，因此關(guān)閉MaximizeBox屬性值為False
namespace _197
{
    public partial class Frm_Child : Form
    {
        #region 變量的聲明
        public event EventHandler? UpdateDataGridView = null;//定義一個(gè)處理更新DataGridView控件內(nèi)容的方法
        private static string? deleteID;        //定義一個(gè)表示刪除數(shù)據(jù)編號(hào)的字符串
        private static string? idContent;       //該變量用來存儲(chǔ)數(shù)據(jù)編號(hào)
        private static string? nameContent;     //該變量用來存儲(chǔ)姓名
        private static string? phoneContent;    //該變量用來存儲(chǔ)電話
        private static string? addressContent;  //該變量用來存儲(chǔ)住址
        private static bool globalFlag;         //該變量用來標(biāo)識(shí)是否創(chuàng)建新的子窗體
 
        public static string? DeleteID { get => deleteID; set => deleteID = value; }
        public static string? IdContent { get => idContent; set => idContent = value; }
        public static string? NameContent { get => nameContent; set => nameContent = value; }
        public static string? PhoneContent { get => phoneContent; set => phoneContent = value; }
        public static string? AddressContent { get => addressContent; set => addressContent = value; }
        public static bool GlobalFlag { get => globalFlag; set => globalFlag = value; }
        #endregion
 
        public Frm_Child()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 添加
        /// </summary>
        private void Button1_Click(object? sender, EventArgs e)
        {
            GlobalFlag = true;                          //設(shè)定標(biāo)識(shí)的值為true
            if (!(comboBox1.Items.Equals(idContent)))   //當(dāng)Combobox控件中不存在將添加的信息時(shí)
            {
                comboBox1.Items.Add(idContent!);        //在Combobox控件中添加一條記錄
            }
            UpdateData();
        }
        /// <summary>
        /// 清空
        /// </summary>
        private void Button2_Click(object? sender, EventArgs e)
        {
            Record_ID.Clear();      //清空編號(hào)文本框中的內(nèi)容
            Record_Name.Clear();    //清空姓名文本框中的內(nèi)容
            Record_Phone.Clear();   //清空電話號(hào)碼文本框中的內(nèi)容
            Record_Address.Clear(); //清空居住地址文本框中的內(nèi)容
            Record_ID.Focus();      //設(shè)定當(dāng)前鼠標(biāo)的焦點(diǎn)在編號(hào)文本框中
        }
        /// <summary>
        /// 刪除
        /// </summary>
        private void Button3_Click(object? sender, EventArgs e)
        {
            GlobalFlag = false;             //設(shè)定全局變量表示為false
            if (comboBox1.Items.Count > 1)  //當(dāng)ComboBox中剩不小于2條內(nèi)容時(shí)
            {
                DeleteID = comboBox1.SelectedItem!.ToString();  //將選中項(xiàng)轉(zhuǎn)化為int型
                if (comboBox1.Items.Count != 0)                 //當(dāng)ComboBox中剩1條內(nèi)容時(shí)
                {
                    comboBox1.Items.Remove(comboBox1.SelectedItem);
                    comboBox1.SelectedIndex = 0;
                }
            }
            UpdateData(); 
        }
        /// <summary>
        /// 保存新添加記錄的編號(hào)
        /// </summary>
        private void Record_ID_TextChanged(object? sender, EventArgs e)
        {
            idContent = Record_ID.Text;
        }
        /// <summary>
        /// 保存填入的姓名
        /// </summary>
        private void Record_Name_TextChanged(object? sender, EventArgs e)
        {
            nameContent = Record_Name.Text;
        }
        /// <summary>
        /// 保存填入的電話號(hào)碼
        /// </summary>
        private void Record_Phone_TextChanged(object? sender, EventArgs e)
        {
            phoneContent = Record_Phone.Text;
        }
        /// <summary>
        /// 保存填入的地址信息
        /// </summary>
        private void Record_Address_TextChanged(object? sender, EventArgs e)
        {
            addressContent = Record_Address.Text;
        }
        /// <summary>
        /// 循環(huán)遍歷數(shù)組中的每一個(gè)元素,向Combobox控件中添加內(nèi)容
        /// 默認(rèn)設(shè)定當(dāng)前選中項(xiàng)的索引為0
        /// </summary>
        private void Frm_Child_Load(object? sender, EventArgs e)
        {
            for (int i = 0; i < Frm_Main.IDArray!.Length; i++)
            {
                comboBox1.Items.Add(Frm_Main.IDArray[i].ToString());
                comboBox1.SelectedIndex = 0;
            }
        }
        /// <summary>
        /// 設(shè)定該值為false表示可以創(chuàng)建新窗體
        /// </summary>
        private void Frm_Child_FormClosing(object? sender, FormClosingEventArgs e)
        {
            Frm_Main.Flag = false; 
        }
       
        /// <summary>
        /// 更新DataGridView控件中的內(nèi)容
        /// </summary>
        protected void UpdateData()
        {
            UpdateDataGridView?.Invoke(this, EventArgs.Empty);
        }
    }
}

5.生成效果

（1）生成

（2）添加

（3）添加后

（4）清空

以上就是C#通過子窗體刷新父窗體的實(shí)現(xiàn)方法的詳細(xì)內(nèi)容，更多關(guān)于C#子窗體刷新父窗體的資料請(qǐng)關(guān)注腳本之家其它相關(guān)文章！

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