怎样使WinForm窗口不能被改变大小呢。

Question

怎么才能使我的WinForm窗口不能被鼠标改变大小呢。也就是固定窗口。我说的不能把窗口改成None,Fiexed这样子的。窗口要有标题，是一个普通的窗口。

Answer 1

设置Form的最大及最小值相等。

Answer 2

将FormBorderStyle属性设置为：FixedSingle试试

Answer 3

在Windows编程中，有时需要限制窗体的大小。那么在C#中如何实现对窗体大小的限制呢？要限制窗体的大小，就必须处理WM_SIZEING消息，而WM_SIZEING消息的lParam参数，是一个指针，它指向RECT结构。这样，C#中又该如何处理指针类型的数据呢？下面的代码仅对窗体的宽度作限制，是根据AOGO的汇编程序改写。看看代码。就知道C#中是如何处理指针类型的数据了。（由此可见C#是多么健壮强劲！）using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Runtime.InteropServices;   //  注意此命名空间的Marshal类，
                                        //  它提供了许多类型转化方法：
                                        //  Marshal.PtrToStringAnsi();
                                        //    Marshal.PtrToStringAuto();
                                        //    Marshal.PtrToStringBSTR();
                                        //    Marshal.PtrToStringUni();
                                        //    Marshal.PtrToStructure();
                                        //    Marshal.StringToBSTR();
                                        //    Marshal.StringToCoTaskMemAnsi();
                                        //    Marshal.StringToCoTaskMemAuto();
                                        //    Marshal.StringToCoTaskMemUni();
                                        //    Marshal.StringToHGlobalAnsi();
                                        //    Marshal.StringToHGlobalAuto();
                                        //    Marshal.StringToHGlobalUni();
                                        //    Marshal.StructureToPtr();namespace WinMsgApp
{    public class Form1 : System.Windows.Forms.Form
    {        // 声明Winodws消息常量
        private const int WM_SIZEING = 0x0214;        // 声明RECT结构
        public struct RECT
        {
            public int left;
            public int top;
            public int right;
            public int bottom;
        }        private System.Windows.Forms.TextBox textBox1;
        private System.Windows.Forms.TextBox textBox2;
        private System.Windows.Forms.TextBox textBox3;
        private System.Windows.Forms.TextBox textBox4;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.Label label4;
        private System.Windows.Forms.Button button1; 
        
        private System.ComponentModel.Container components = null;        public Form1()
        {
            InitializeComponent();
        }        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }        #region Windows Form Designer generated code        private void InitializeComponent()
        {
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.textBox2 = new System.Windows.Forms.TextBox();
            this.textBox3 = new System.Windows.Forms.TextBox();
            this.textBox4 = new System.Windows.Forms.TextBox();
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.label3 = new System.Windows.Forms.Label();
            this.label4 = new System.Windows.Forms.Label();
            this.button1 = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // textBox1
            // 
            this.textBox1.Location = new System.Drawing.Point(80, 8);
            this.textBox1.Name = "textBox1";
            this.textBox1.TabIndex = 0;
            this.textBox1.Text = "";
            // 
            // textBox2
            // 
            this.textBox2.Location = new System.Drawing.Point(80, 32);
            this.textBox2.Name = "textBox2";
            this.textBox2.TabIndex = 1;
            this.textBox2.Text = "";
            // 
            // textBox3
            // 
            this.textBox3.Location = new System.Drawing.Point(80, 56);
            this.textBox3.Name = "textBox3";
            this.textBox3.TabIndex = 2;
            this.textBox3.Text = "";
            // 
            // textBox4
            // 
            this.textBox4.Location = new System.Drawing.Point(80, 80);
            this.textBox4.Name = "textBox4";
            this.textBox4.TabIndex = 3;
            this.textBox4.Text = "";
            // 
            // label1
            // 
            this.label1.Location = new System.Drawing.Point(0, 8);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(78, 23);
            this.label1.TabIndex = 4;
            this.label1.Text = "Left:";
            this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
            // 
            // label2
            // 
            this.label2.Location = new System.Drawing.Point(0, 32);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(78, 23);
            this.label2.TabIndex = 5;
            this.label2.Text = "Top:";
            this.label2.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
            // 
            // label3
            // 
            this.label3.Location = new System.Drawing.Point(0, 56);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(78, 23);
            this.label3.TabIndex = 6;
            this.label3.Text = "Right:";
            this.label3.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
            // 
            // label4
            // 
            this.label4.Location = new System.Drawing.Point(0, 80);
            this.label4.Name = "label4";
            this.label4.Size = new System.Drawing.Size(78, 23);
            this.label4.TabIndex = 7;
            this.label4.Text = "Bottom:";
            this.label4.TextAlign = System.Drawing.ContentAlignment.MiddleRight;
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(208, 8);
            this.button1.Name = "button1";
            this.button1.TabIndex = 8;
            this.button1.Text = "button1";
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(296, 117);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.button1,
                                                                          this.label4,
                                                                          this.label3,
                                                                          this.label2,
                                                                          this.label1,
                                                                          this.textBox4,
                                                                          this.textBox3,
                                                                          this.textBox2,
                                                                          this.textBox1});
            this.Name = "Form1";
            this.Text = "Form1";
            this.ResumeLayout(false);        }
        #endregion

Answer 4

接上：// 以下是处理WINDOWS消息的主要代码
        protected override void WndProc(ref System.Windows.Forms.Message m )
        {
            switch(m.Msg) 
            {         
                case WM_SIZEING:                    ///*****以下各种方法，生成代码大小顺序是由小到大
                     
                    // 第一种方法，简洁明了
                    // RECT rc = (RECT)m.GetLParam(typeof(RECT));                    // 第二种方法，普适通用。代码比第一种方法多 5 字节
                    // RECT rc=(RECT)Marshal.PtrToStructure(m.LParam ,typeof(RECT));                    // 第三种方法，易懂稍繁。代码比第二种方法多 4 字节
                    RECT rc = new RECT();
                    rc = (RECT)m.GetLParam(rc.GetType());
                    // 限制窗体宽度不超过600
                    if (rc.right - rc.left >450)
                    {
                        rc.right = rc.left + 450;
                    }
                    else if (rc.right - rc.left <200)
                    {
                        rc.right = rc.left + 200;
                    }                    // 将结构rc各字段的值显示出来
                    textBox1.Text = rc.left.ToString();
                    textBox2.Text = rc.top.ToString();
                    textBox3.Text = rc.right.ToString();
                    textBox4.Text = rc.bottom.ToString();                    // 将结构rc复制到m.LParam指针所指向的RECT结构
                    Marshal.StructureToPtr(rc,m.LParam,true);                    break;
                default: 
                    base.WndProc(ref m);   // 调用基类函数处理其他消息。 
                    break; 
            } 
        }
        
    
        [STAThread]
        static void Main() 
        {
            Application.Run(new Form1());
        }        private void button1_Click(object sender, System.EventArgs e)
        {
            MessageBox.Show( Environment.GetFolderPath(Environment.SpecialFolder.System)); 
        }
    }
}

Answer 5

谢谢，kkk_visual(宇宙中我是最厉害的！哈哈（但不包括地球）) 。