c# 禁用和啟用windows form表單上的關閉按鈕

禁用和啟用windows form表單上的關閉按鈕

 

1public partial class Form1 : Form
2    {
3        private bool isEnableCloseButton = false;
4        public Form1(string strFlag)
5        {
6             InitializeComponent();
7            if (strFlag == "no")
8            {
9                this.lbl_CloseButtonIsEnabled.Text = "表單右上方關閉按鈕無效";
10                this.isEnableCloseButton = false;
11             }
12            else
13            {
14                this.lbl_CloseButtonIsEnabled.Text = "可以通過表單右上方關閉按鈕 關閉表單";
15                this.isEnableCloseButton = true;
16             }
17         }
18
19        protected override CreateParams CreateParams
20        {
21            get
22            {
23                if (isEnableCloseButton)
24                {
25                     CreateParams parameters = base.CreateParams;
26                    return parameters;
27                 }
28                else
29                {
30      int CS_NOCLOSE = 0x200;
31                     CreateParams parameters = base.CreateParams;
32                     parameters.ClassStyle |= CS_NOCLOSE;
33                    return parameters;                    
34                 }
35             }
36         }
37}