WinForm (5) control and its members

Form is undoubtedlyWinForm的主角,Use one for each formclass来承载,Then the controls of the form,It's a private field in a class.There are three files for each form,两个.cs文件,is a partial class,Designer.cs是自动生成的C#代码,Generally, the code generated after dragging and dropping the control;另一个.csThe file is used to write business code;第三个是.resx文件,is a resource source,picture of form,图标,And some control configuration information.

For example the form below：

The generated code is as follows so much,It can be seen that the designer has contributed a lot.

注：The code below is just to show you how long it is,不需要仔细研究.

namespace WinFormDemo04
{
    partial class Form1
    {
        /// <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()
        {
        
            this.button1 = new System.Windows.Forms.Button();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.comboBox1 = new System.Windows.Forms.ComboBox();
            this.listBox1 = new System.Windows.Forms.ListBox();
            this.label1 = new System.Windows.Forms.Label();
            this.treeView1 = new System.Windows.Forms.TreeView();
            this.dataGridView1 = new System.Windows.Forms.DataGridView();
            this.gridId = new System.Windows.Forms.DataGridViewTextBoxColumn();
            this.gridName = new System.Windows.Forms.DataGridViewTextBoxColumn();
            this.pictureBox1 = new System.Windows.Forms.PictureBox();
            this.radioButton1 = new System.Windows.Forms.RadioButton();
            this.checkBox1 = new System.Windows.Forms.CheckBox();
            ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit();
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
            this.SuspendLayout();
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(35, 27);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(75, 23);
            this.button1.TabIndex = 0;
            this.button1.Text = "button1";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(203, 27);
            this.textBox1.Name = "textBox1";
            this.textBox1.Size = new System.Drawing.Size(100, 23);
            this.textBox1.TabIndex = 1;
            this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
            // 
            // comboBox1
            // 
            this.comboBox1.FormattingEnabled = true;
            this.comboBox1.Location = new System.Drawing.Point(325, 26);
            this.comboBox1.Name = "comboBox1";
            this.comboBox1.Size = new System.Drawing.Size(121, 25);
            this.comboBox1.TabIndex = 2;
            this.comboBox1.SelectedIndexChanged += new System.EventHandler(this.comboBox1_SelectedIndexChanged);
            // 
            // listBox1
            // 
            this.listBox1.FormattingEnabled = true;
            this.listBox1.ItemHeight = 17;
            this.listBox1.Items.AddRange(new object[] {
            "111",
            "222",
            "aaa"});
            this.listBox1.Location = new System.Drawing.Point(199, 84);
            this.listBox1.Name = "listBox1";
            this.listBox1.Size = new System.Drawing.Size(120, 89);
            this.listBox1.TabIndex = 3;
            this.listBox1.SelectedIndexChanged += new System.EventHandler(this.listBox1_SelectedIndexChanged);
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Location = new System.Drawing.Point(138, 30);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(43, 17);
            this.label1.TabIndex = 4;
            this.label1.Text = "label1";
            this.label1.Click += new System.EventHandler(this.label1_Click);
            // 
            // treeView1
            // 
            System.Windows.Forms.TreeNode treeNode1 = new System.Windows.Forms.TreeNode("节点1");
            System.Windows.Forms.TreeNode treeNode2 = new System.Windows.Forms.TreeNode("节点2");
            System.Windows.Forms.TreeNode treeNode3 = new System.Windows.Forms.TreeNode("节点0", new System.Windows.Forms.TreeNode[] {
            treeNode1,
            treeNode2});
            System.Windows.Forms.TreeNode treeNode4 = new System.Windows.Forms.TreeNode("节点4");
            System.Windows.Forms.TreeNode treeNode5 = new System.Windows.Forms.TreeNode("节点5");
            System.Windows.Forms.TreeNode treeNode6 = new System.Windows.Forms.TreeNode("节点3", new System.Windows.Forms.TreeNode[] {
            treeNode4,
            treeNode5});


            this.treeView1.Location = new System.Drawing.Point(325, 84);
            this.treeView1.Name = "treeView1";
            treeNode1.Name = "节点1";
            treeNode1.Text = "节点1";
            treeNode2.Name = "节点2";
            treeNode2.Text = "节点2";
            treeNode3.Name = "节点0";
            treeNode3.Text = "节点0";
            treeNode4.Name = "节点4";
            treeNode4.Text = "节点4";
            treeNode5.Name = "节点5";
            treeNode5.Text = "节点5";
            treeNode6.Name = "节点3";
            treeNode6.Text = "节点3";
            this.treeView1.Nodes.AddRange(new System.Windows.Forms.TreeNode[] {
            treeNode3,
            treeNode6});
            this.treeView1.Size = new System.Drawing.Size(121, 97);
            this.treeView1.TabIndex = 5;
            this.treeView1.AfterSelect += new System.Windows.Forms.TreeViewEventHandler(this.treeView1_AfterSelect);
            // 
            // dataGridView1
            // 
            this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            this.dataGridView1.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
            this.gridId,
            this.gridName});
            this.dataGridView1.Location = new System.Drawing.Point(30, 209);
            this.dataGridView1.Name = "dataGridView1";
            this.dataGridView1.Size = new System.Drawing.Size(258, 150);
            this.dataGridView1.TabIndex = 6;
            this.dataGridView1.CellContentClick += new System.Windows.Forms.DataGridViewCellEventHandler(this.dataGridView1_CellContentClick);
            // 
            // ID
            // 
            this.gridId.HeaderText = "ID";
            this.gridId.Name = "ID";
            // 
            // GridName
            // 
            this.gridName.HeaderText = "Name";
            this.gridName.Name = "GridName";
            // 
            // pictureBox1
            // 
            this.pictureBox1.Location = new System.Drawing.Point(321, 221);
            this.pictureBox1.Name = "pictureBox1";
            this.pictureBox1.Size = new System.Drawing.Size(100, 50);
            this.pictureBox1.TabIndex = 7;
            this.pictureBox1.TabStop = false;
            this.pictureBox1.Click += new System.EventHandler(this.pictureBox1_Click);
            // 
            // radioButton1
            // 
            this.radioButton1.AutoSize = true;
            this.radioButton1.Location = new System.Drawing.Point(33, 89);
            this.radioButton1.Name = "radioButton1";
            this.radioButton1.Size = new System.Drawing.Size(102, 21);
            this.radioButton1.TabIndex = 8;
            this.radioButton1.TabStop = true;
            this.radioButton1.Text = "radioButton1";
            this.radioButton1.UseVisualStyleBackColor = true;
            this.radioButton1.CheckedChanged += new System.EventHandler(this.radioButton1_CheckedChanged);
            // 
            // checkBox1
            // 
            this.checkBox1.AutoSize = true;
            this.checkBox1.Location = new System.Drawing.Point(33, 125);
            this.checkBox1.Name = "checkBox1";
            this.checkBox1.Size = new System.Drawing.Size(89, 21);
            this.checkBox1.TabIndex = 9;
            this.checkBox1.Text = "checkBox1";
            this.checkBox1.UseVisualStyleBackColor = true;
            this.checkBox1.CheckedChanged += new System.EventHandler(this.checkBox1_CheckedChanged);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(7F, 17F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(497, 418);
            this.Controls.Add(this.checkBox1);
            this.Controls.Add(this.radioButton1);
            this.Controls.Add(this.pictureBox1);
            this.Controls.Add(this.dataGridView1);
            this.Controls.Add(this.treeView1);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.listBox1);
            this.Controls.Add(this.comboBox1);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.button1);
            this.Margin = new System.Windows.Forms.Padding(2);
            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit();
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();
        }
        #endregion
        private Button button1;
        private TextBox textBox1;
        private ComboBox comboBox1;
        private ListBox listBox1;
        private Label label1;
        private TreeView treeView1;
        private DataGridView dataGridView1;
        private PictureBox pictureBox1;
        private RadioButton radioButton1;
        private CheckBox checkBox1;
        private DataGridViewTextBoxColumn gridId;
        private DataGridViewTextBoxColumn gridName;
    }
}

一个classThe members in can be fields,属性,方法,构造函数,析构函数,事件,索引器,重载运算符,常量,内部嵌套类.通常,in a class libraryclass,Properties and methods are the most common,When visualizing a form or control class,Properties and events are the most common,This is due to the action of the device or internal input through the computer,会触发很多事件,These events call the methods we subscribe to,So as to complete the flow of business.So learn visual controls,It is to learn his attributes and events.每个控件,The event that is automatically subscribed after double-clicking is the most commonly used control for this control,比如Button的Click,TextBox的TextChanged事件等.

Some controls have sub-controls or sub-options,Just like a property of a type is some collection type,Subtypes can be added.Some controls are container controls,Used to host other controls,它有一个Controles的属性,Other types of controls can be added.

The use of each control will not be expanded here,Because there is a lot of relevant information,Official documentation is a good choice.

在WinForm中,Most events arexxxEventHandlerAs a delegate that defines the event,并且有两个参数,第一个是object sender,It is the control that emits the event,第二个参数是EventArgs或它的子类,If it is a subclass of it,Will carry some event parameters.xxxEventHandler和xxxEventArgs与EventHandler和EventArgsIs the relationship between delegates and parameters,也是对应的.

private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
}

比如DataGridViewCellEventHandler和DataGridViewCellEventArgs,并且ArgsThere are row and column subscripts of the current cell.

Learning controls is a delicate job,一个一个过,Pay attention to their properties,事件,Although there are few methods,But also pay attention,It's like studying a class,Depends on what his members have,What is the role of each.