C#动态循环生成控件附源码

前言

该文章总结了如何在C#动态带出控件并进行编写，从而避免制作人员拖出一个个控件，解决了控件过多，而导致代码冗余过长的问题，本文联合了sql server数据库进行编写，使得文件管理更加有序

一、为什么要动态带出代码？

1.示例图片

示例图片：

2.原因

如上图，我有15个商品下单部分，每个部分有5个相关的控件，包括（textbox、label、button、GroupBox、pictureBox），整个小界面就有75个控件。
如果我一个个拖出相关控件出来并进行编写，这会导致出现将近3千行垃圾代码，况且我一个采购界面不止一个小界面（有16个小界面），所以我不得不采取动态带出控件，来进行程序的编写。

二、动态带出步骤

1.定义

1.定义相关控件

我们要定义相关控件，想要找到他们之间的父子级练习，比如我的groupbox要放在一个panel里面，我的其他控件要放在groupbox里面

代码如下（示例）：

            Panel[] panel1s = new Panel[30];
            System.Windows.Forms.GroupBox[] GroupBoxs = new System.Windows.Forms.GroupBox[30];
            Button[] bnt = new Button[30];
            PictureBox[] pictureBoxes = new PictureBox[30];

2.进行循环（部分代码展现）

其次我们要开始通过循环语句，带出相关控件，通过定义各个控件的相关属性，使得控件可以被带出并进行展示

代码如下（示例）：

 for (int i = 0; i < 16; i  )
            {
                GroupBoxs[i] = new System.Windows.Forms.GroupBox();
                GroupBoxs[i].Name = "panel_"   i.ToString();
                GroupBoxs[i].Parent = panel2;
                GroupBoxs[i].Location = new Point((i % 4) * 300, (i / 4) * 200);
                GroupBoxs[i].Width = 300;
                GroupBoxs[i].Height = 150;

                var textBox = new System.Windows.Forms.TextBox();
                textBox.Name = "DishTextBox_"   i.ToString();//textbox属性名字
                textBox.Text = "白菜" //textbox展示的字段
                textBox.Parent = GroupBoxs[i];
                textBox.Location = new Point(10, 10);
                textBox.Size = new Size(100, 30);
                textBox.ReadOnly = true;

                var textBox2 = new System.Windows.Forms.TextBox();
                textBox2.Name = "textBox_"   i.ToString();
                textBox2.Parent = GroupBoxs[i];
                textBox2.Location = new Point(170, 60);
                textBox2.Size = new Size(50, 30);

                var textBox3 = new System.Windows.Forms.TextBox();
                textBox3.Name = "FoodNo_"   i.ToString();          
                textBox3.Parent = GroupBoxs[i];
                textBox3.Location = new Point(170, 60);
                textBox3.Size = new Size(50, 30);
                textBox3.Visible = false;

                var label = new System.Windows.Forms.Label();
                label.Name = "lbl_"   i.ToString();
                label.Text = "采购数量（斤）";
                label.Parent = GroupBoxs[i];
                label.Location = new Point(155, 40);
                label.Size = new Size(100, 30);
             
                bnt[i] = new Button();
                bnt[i].Name = "bntton_"   i.ToString();
                bnt[i].Text = "添加入单";
                bnt[i].Parent = GroupBoxs[i];
                bnt[i].Location = new Point(155, 100);
                bnt[i].Size = new Size(80, 20);                
            }

3.编写数据库语句

代码如下（示例）：

var dt = DBcoonnet.Query(string.Format("select NameOfFood,PictureAddress,FoodNo FROM [CanteenManagement].[dbo].[BasicTableOfDishes] where TypeOfFood = '{0}' ", nodeName)).Tables[0];

三、源码展现

1、源码

        public void order(string nodeName)
        {

            Panel[] panel1s = new Panel[30];
            System.Windows.Forms.GroupBox[] GroupBoxs = new System.Windows.Forms.GroupBox[30];
            Button[] bnt = new Button[30];
            PictureBox[] pictureBoxes = new PictureBox[30];

            var dt = DBcoonnet.Query(string.Format("select NameOfFood,PictureAddress,FoodNo FROM [CanteenManagement].[dbo].[BasicTableOfDishes] where TypeOfFood = '{0}' ", nodeName)).Tables[0];//此处调用了我的相关数据库，读者可以对相关sql语句进行编写
            for (int i = 0; i < dt.Rows.Count; i  )
            {
                GroupBoxs[i] = new System.Windows.Forms.GroupBox();
                GroupBoxs[i].Name = "panel_"   i.ToString();
                GroupBoxs[i].Parent = panel2;
                GroupBoxs[i].Location = new Point((i % 4) * 300, (i / 4) * 200);
                GroupBoxs[i].Width = 300;
                GroupBoxs[i].Height = 150;


                var textBox = new System.Windows.Forms.TextBox();
                textBox.Name = "DishTextBox_"   i.ToString();
                textBox.Text = dt.Rows[i]["NameOfFood"].ToString();
                textBox.Parent = GroupBoxs[i];
                textBox.Location = new Point(10, 10);
                textBox.Size = new Size(100, 30);
                textBox.ReadOnly = true;


                var textBox2 = new System.Windows.Forms.TextBox();
                textBox2.Name = "textBox_"   i.ToString();
                textBox2.Parent = GroupBoxs[i];
                textBox2.Location = new Point(170, 60);
                textBox2.Size = new Size(50, 30);

                var textBox3 = new System.Windows.Forms.TextBox();
                textBox3.Name = "FoodNo_"   i.ToString();
                textBox3.Text = dt.Rows[i]["FoodNo"].ToString();
                textBox3.Parent = GroupBoxs[i];
                textBox3.Location = new Point(170, 60);
                textBox3.Size = new Size(50, 30);
                textBox3.Visible = false;


                var label = new System.Windows.Forms.Label();
                label.Name = "lbl_"   i.ToString();
                label.Text = "采购数量（斤）";
                label.Parent = GroupBoxs[i];
                label.Location = new Point(155, 40);
                label.Size = new Size(100, 30);


                var pictureBox = new PictureBox();
                pictureBox.Name = "pictureBoxes"   i.ToString();
                pictureBox.Text = "pictureBoxes"   i.ToString();
                pictureBox.Parent = GroupBoxs[i];
                pictureBox.Location = new Point(10, 30);
                pictureBox.Size = new Size(100, 100);
                pictureBox.Image = System.Drawing.Image.FromFile(dt.Rows[i]["PictureAddress"].ToString());
                pictureBox.BackgroundImageLayout = ImageLayout.Stretch;
                pictureBox.SizeMode = PictureBoxSizeMode.StretchImage;


                bnt[i] = new Button();
                bnt[i].Name = "bntton_"   i.ToString();
                bnt[i].Text = "添加入单";
                bnt[i].Parent = GroupBoxs[i];
                bnt[i].Location = new Point(155, 100);
                bnt[i].Size = new Size(80, 20);
            }
        }

2、代码效果展示

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