Enable

How do I use Enable
Below are practical examples compiled from projects for learning and reference purposes

Featured Snippets

Line	Code	Ex..
29	btnTDDT.Enabled = true;	1
136	cmbMaHK.Enabled = false;	2
118	cmbMaHK.Enabled = false;	3
67	cmbMaNhomHP.Enabled = true;	4
16	Application.EnableVisualStyles();	5
179	button4.Enabled = true;	6
357	button4.Enabled = false;	7
207	btPre.Enabled = false;	8
223	btNext.Enabled = true;	9
246	btPre.Enabled = true;	10

File name: Form9.cs Copy

24         public void PhanQuyenMenu()
25         {
26             switch (quyen)
27             {
28                 case 1 :
29                     btnTDDT.Enabled = true;
30                     btnHeDT.Enabled = true;
31                     btnHocKy.Enabled = true;
32                     btnKHGD.Enabled = true;
33                     btnKhoiLop.Enabled = true;
34                     btnDangNhap.Enabled = false;
35                     btnDangXuat.Enabled = true;
36                     btnPhanQuyen.Enabled = true;
37                     btnGiangVien.Enabled = true;
38                     btnHocPhan.Enabled = true;
39                     btnLop.Enabled = true;
40                     btnNhomHocPhan.Enabled = true;
41                     btnSinhVien.Enabled = true;
42                     btnQuanLyDiem.Enabled = true;
43                     btnXemDiemLop.Enabled = false;
44                     btnXemDiemNhomHP.Enabled = true ;
45                     btnBaoCao.Enabled = true;
46                     btnThongKe.Enabled = true;
47                     btnXemDiem.Enabled = true;
48                     btnXemDiemLop.Enabled = true;
49                     break;
50                 case 2 :
51                     btnDangNhap.Enabled = false;
52                     btnDangXuat.Enabled = true;
53                     btnBaoCao.Enabled = false;
54                     btnThongKe.Enabled = false;
55                     btnXemDiem.Enabled = true;
56                     btnXemDiemNhomHP.Enabled = false;
57                     break;
58                 default:
59                     btnTDDT.Enabled = false;
60                     btnHeDT.Enabled = false;
61                     btnHocKy.Enabled = false;
62                     btnKHGD.Enabled = false;
63                     btnKhoiLop.Enabled = false;
64                     btnDangNhap.Enabled = true;
65                     btnDangXuat.Enabled = false;
66                     btnPhanQuyen.Enabled = false;
67                     btnGiangVien.Enabled = false;
68                     btnHocPhan.Enabled = false;
69                     btnLop.Enabled = false;
70                     btnNhomHocPhan.Enabled = false;
71                     btnSinhVien.Enabled = false;
72                     btnQuanLyDiem.Enabled = false;
73                     btnThongKe.Enabled = false;
74                     btnXemDiemLop.Enabled = false;
75                     btnBaoCao.Enabled = false;
76                     btnXemDiemNhomHP.Enabled = false;
77                     btnXemDiem.Enabled = false;
78                     break;
79             }
80         }

File name: FormXemDiem.cs Copy

130         private void chbXemTatCaHocKy_CheckedChanged(object sender, EventArgs e)
131         {
132             int i = -1;
133             i = i * j;
134             if (i == 1)
135             {
136                 cmbMaHK.Enabled = false;
137             }
138             else
139             {
140                 cmbMaHK.Enabled = true;
141             }
142             j = -j;
143         }

File name: FormXemDiemLop.cs Copy

112         private void chbXemTatCa_CheckedChanged(object sender, EventArgs e)
113         {
114             int i = -1;
115             i = i * j;
116             if (i == 1)
117             {
118                 cmbMaHK.Enabled = false;
119             }
120             else
121             {
122                 cmbMaHK.Enabled = true;
123             }
124             j = -j;
125         }

File name: FormXemDiemNhomHP.cs Copy

65         private void cmbMaHK_SelectedValueChanged(object sender, EventArgs e)
66         {
67             cmbMaNhomHP.Enabled = true;
68             loadCmbMaNhomHP();
69         }

File name: Program.cs Copy

14         static void Main()
15         {
16             Application.EnableVisualStyles();
17             Application.SetCompatibleTextRenderingDefault(false);
18             Application.Run(new Form9());
19         }

File name: frmCapNhat.cs Copy

176         private void btLog_Click(object sender, EventArgs e)
177         {
178             Bandau();
179             button4.Enabled = true;
180             textBox5.Text = SDienMaTuDong(textBox1.Text, sqlcmd, sqlcon);
181         }

File name: frmCapNhat.cs Copy

311         private void button4_Click(object sender, EventArgs e)
312         {
313             if (richTextBox1.Text == "" || textBox1.Text == "" || textBox2.Text == "" || textBox3.Text == "" || textBox4.Text == "" || (checkBox1.Checked == false && checkBox2.Checked == false && checkBox3.Checked == false && checkBox4.Checked == false))
314             {
315                 MessageBox.Show("Bạn chưa thêm đầy đủ thông tin", "Thông báo");
316             }
317             else
318             {
319                 try
320                 {
321
322                     string sCauA = textBox1.Text;
323                     string sCauB = textBox2.Text;
324                     string sCauC = textBox3.Text;
325                     string sCauD = textBox4.Text;
326                     string sMaCH = textBox5.Text;
327                     string sCauHoi = richTextBox1.Text;
328                     string sCauDung = "";
329                     string sCauDungLuu = "";
330                     string sTrinhDo = comboBox1.Text;
331                     if (checkBox1.Checked == true)
332                     {
333                         sCauDung = "A";
334                         sCauDungLuu += sCauDung;
335                     }
336                     if (checkBox2.Checked == true)
337                     {
338                         sCauDung = "B";
339                         sCauDungLuu += sCauDung;
340                     }
341                     if (checkBox3.Checked == true)
342                     {
343                         sCauDung = "C";
344                         sCauDungLuu += sCauDung;
345                     }
346                     if (checkBox4.Checked == true)
347                     {
348                         sCauDung = "D";
349                         sCauDungLuu += sCauDung;
350                     }
351
352                     sqlcmd = new SqlCommand("insert into dapan values('" + sMaCH + "','" + sCauA + "','" + sCauB + "','" + sCauC + "','" + sCauD + "','" + sCauDungLuu + "') ", sqlcon);
353                     sqlcmd.ExecuteNonQuery();
354                     sqlcmd = new SqlCommand("insert into cauhoi values('" + sMaCH + "','" + sCauHoi + "','" + sTrinhDo + "') ", sqlcon);
355                     sqlcmd.ExecuteNonQuery();
356                     LoadDataToListView();
357                     button4.Enabled = false;
358                 }
359                 //roi hen;de bi coi lai thu de cHOAky thu chay thu hen ok
360                 catch
361                 {
362                     MessageBox.Show("Bạn đã thao tác sai");
363                 }
364             }
365         }

File name: frmThiThat.cs Copy

190         private void frmThiThat_Load(object sender, EventArgs e)
191         {
192
193
194             lbNgaythang.Text = DateTime.Now.Day.ToString() + "/" + DateTime.Now.Month.ToString() + "/" + DateTime.Now.Year.ToString();
195
196             {
197                 try
198                 {
199                     if (DeThi == true)
200                         Load_DeThiThat();
201                     else
202                         Load_DeThiThat();
203                     TaoBangRandomCauTraLoi();
204                     LoadCauHoiVaoControl();
205                     timer1.Start();
206
207                     btPre.Enabled = false;
208                 }
209                 catch (Exception ex)
210                 { MessageBox.Show(ex.Message); }
211             }
212
213         }

File name: frmThiThat.cs Copy

215         private void btPre_Click(object sender, EventArgs e)
216         {
217             try
218             {
219                 GhiLaiDapAnTS();
220                 if (CauHienTai > 0)
221                 {
222                     GhiLaiDapAnTS();
223                     btNext.Enabled = true;
224                     checkBox1.Checked = false;
225                     checkBox2.Checked = false;
226                     checkBox3.Checked = false;
227                     checkBox4.Checked = false;
228                     CauHienTai--;
229                     LoadCauHoiVaoControl();
230                 }
231                 if (CauHienTai == 0)
232                     btPre.Enabled = false;
233             }
234             catch (Exception ex)
235             { MessageBox.Show(ex.Message); }
236         }

File name: frmThiThat.cs Copy

238         private void btNext_Click(object sender, EventArgs e)
239         {
240             try
241             {
242                 GhiLaiDapAnTS();
243                 if (CauHienTai < SoCauHoi - 1)
244                 {
245                     GhiLaiDapAnTS();
246                     btPre.Enabled = true;
247                     checkBox1.Checked = false;
248                     checkBox2.Checked = false;
249                     checkBox3.Checked = false;
250                     checkBox4.Checked = false;
251                     CauHienTai++;
252                     LoadCauHoiVaoControl();
253                 }
254                 if (CauHienTai == SoCauHoi - 1)
255                     btNext.Enabled = false;
256             }
257             catch (Exception ex)
258             { MessageBox.Show(ex.Message); }
259         }

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