丰富“WinForms” 的一个别样项目(学生管理)

     一个别样的WinForms项目,他并没多么的新颖,但是它的用处确实有点多,或许会有你需要的地方;如果你对WinForms中那么多控件无法把握,又或者是你根本就不懂,那我觉得你应该好好看看,如果一个人的人生命运无法去选择时,那我觉得接受它将是冲刺命运终点的最好动力,一切的不公平都是你为了躲避困难而找的借口,年轻人就需要不平坦的人生道路,通过刻苦奋斗得来的果实永远是最甜、平坦的人生亦是最幸福的瞬间。

     那首先就是项目的框架分别是:登录(FrmLogin )——>主界面(FrmMain)——>修改密码(FrmUpdate)——>添加/修改/删除学生基本信息等。

    框架搭好之后,我们了解一些框架内的代码吧!至于具体的一些控件呢!只能是自己慢慢去看看,有些注意点大家可以记下,在控件生成后要及时去修改控件的“Name”的属性,如果够专业就尽量取专业点名字,那样对你可能会有帮助的。

    当界面形成后,事件会是你填写代码的最大障碍,所以WinForms的几个事件需要认真记住:(单击)Click,当界面显示在眼前就形成的(Load),窗体正在运行的(FormClosing),(鼠标在界面移动)mouseClick

    1.登录界面(FrmLogin)

点击登陆进去的代码:

   string str = "Data source=.;Initial catalog=Myschool;Uid=sa";SqlConnection con = new SqlConnection(str);string sql = "select count(1) from student where studentname='"+txtUserName.Text+"' and Loginpwd='"+txtPwd.Text+"'";SqlCommand cmd = new SqlCommand(sql,con);try{con.Open();int count=Convert.ToInt32(cmd.ExecuteScalar());if (count>0){//隐藏原界面this.Hide();//跳转至主界面FormMain frm = new FormMain();Tool.pwd = txtPwd.Text;frm.Show();}}catch (Exception){MessageBox.Show("出现异常");}finally {con.Close();}

2.跳转主界面(FrmMain)

菜单控件,工具控件、右键(contextMenuStrip)控件,ListView控件、视图等

其中有ListView五大视图

  1.大图标(LargeIcon)

  2.小图标(SmallIcon)

  3.列表(List)

  4.详细信息(Detail)

  5.平铺(Tile)

 生成上方主界面ListView代码:

 private void btnBig_Click(object sender, EventArgs e){//设置listview的属性view为大图标lvlist.View = View.LargeIcon;}private void btnSmall_Click(object sender, EventArgs e){//设置listview的属性view为小图标lvlist.View = View.SmallIcon;}private void btnTile_Click(object sender, EventArgs e){//设置listview的属性view为平铺lvlist.View = View.Tile;}private void btnList_Click(object sender, EventArgs e){//设置listview的属性view为列表lvlist.View = View.List;}private void btnDetails_Click(object sender, EventArgs e){//设置listview的属性view为详细信息lvlist.View = View.Details;}

跳转至其它的各个功能的窗体:

        private void TsmiUpdate_Click(object sender, EventArgs e){//修改密码FrmUpdate frm = new FrmUpdate();frm.Show();}private void lvlist_SelectedIndexChanged(object sender, EventArgs e){}private void StuName_Click(object sender, EventArgs e){//查找this.Hide();FrmColor frm = new FrmColor();frm.Show();}

3.修改密码(FrmUpdate)

判断密码是否为空,修改密码是否成功

 private void btnupdate_Click(object sender, EventArgs e){string name = string.Empty;if (txtoldpwd.Text==name){DialogResult result=MessageBox.Show("原密码为空","通知",MessageBoxButtons.YesNo,MessageBoxIcon.Information);if (result==DialogResult.No){this.Close();}}if (txtnewpwd.Text == name){DialogResult result = MessageBox.Show("新密码密码为空", "通知", MessageBoxButtons.YesNo, MessageBoxIcon.Information);if (result == DialogResult.No){this.Close();}}if(txtOK.Text == name){DialogResult result = MessageBox.Show("确认密码为空", "通知", MessageBoxButtons.YesNo, MessageBoxIcon.Information);if (result == DialogResult.No){this.Close();}}if (txtoldpwd.Text != name && txtnewpwd.Text != name && txtOK.Text != name){string str = "Data source=.;Initial catalog=Myschool;Uid=sa";SqlConnection conn = new SqlConnection(str);string sql = "update student set Loginpwd='" + txtnewpwd.Text + "' where Loginpwd='" + txtoldpwd.Text + "'";SqlCommand cmd = new SqlCommand(sql, conn);try{conn.Open();if (txtOK.Text.Equals(txtnewpwd.Text)){int count = cmd.ExecuteNonQuery();if (count > 0){MessageBox.Show("修改成功");}}                                    }catch (Exception){MessageBox.Show("异常!"); ;}finally{conn.Close();}}}private void FrmUpdate_Load(object sender, EventArgs e){txtoldpwd.Text = Tool.pwd;}private void btncancel_Click(object sender, EventArgs e){this.Close();}

4.查找学生信息(FrmReseach)

从查找可以跳转到添加/修改/删除窗体

  private void btnselect_Click(object sender, EventArgs e){UpdateSelect();}//按学生编号查找的方法public void LoadDataFromDBToListView(string sql){string str = "data source=.;initial catalog=MySchool;uid=sa";SqlConnection con = new SqlConnection(str);SqlCommand cmd = new SqlCommand(sql, con);try{con.Open();SqlDataReader dr = cmd.ExecuteReader();if (dr != null){if (dr.HasRows){while (dr.Read()){//每从DB中读取出一条数据,需要形成一个ListViewItem对象,代表的是ListView中的一行int stuNo = Convert.ToInt32(dr["studentno"]);//第二列 学生名字string stuName = Convert.ToString(dr["studentname"]);//第三列  性别string stugender = Convert.ToString(dr["gender"]);//第四列  年级名称string gname = Convert.ToString(dr["gradename"]);//第五列  电话string phone = Convert.ToString(dr["phone"]);//第六列   地址string address = Convert.ToString(dr["address"]);//第七列   邮箱string email = Convert.ToString(dr["email"]);//第八列   出生日期string birthday = Convert.ToString(dr["birthday"]);ListViewItem lvItem = new ListViewItem(stuNo.ToString());lvItem.SubItems.Add(stuName);lvItem.SubItems.Add(stugender);lvItem.SubItems.Add(gname);lvItem.SubItems.Add(phone);lvItem.SubItems.Add(address);lvItem.SubItems.Add(email);lvItem.SubItems.Add(birthday);//让lvItem和ListView关联
                           lvlist.Items.Add(lvItem);lvlist.FullRowSelect = true;lvlist.ContextMenuStrip = ctmslist;}dr.Close();}}}catch (Exception){MessageBox.Show("异常!"); ;}finally{con.Close();}}private void listView1_SelectedIndexChanged(object sender, EventArgs e){string sql = @"select Studentno,Studentname,Gender,gradename,phone,address,email,birthday from student,gradewhere student.gradeid=grade.gradeid";LoadDataFromDBToListView(sql);}public void UpdateSelect(){lvlist.Items.Clear();string sql = @"select Studentno,Studentname,Gender,gradename,phone,address,email,birthday from student,gradewhere student.gradeid=grade.gradeid and studentname like '%" + txtname.Text + "%' ";LoadDataFromDBToListView(sql);}private void TsStudentInfo_Click(object sender, EventArgs e){int stuno=Convert.ToInt32(lvlist.SelectedItems[0].Text);FrmEditStu frm = new FrmEditStu();frm.stuno = stuno;frm.frmselect = this;frm.Show();}private void FrmColor_FormClosing(object sender, FormClosingEventArgs e){Application.Exit();}private void 删除学生信息ToolStripMenuItem_Click(object sender, EventArgs e){int sno = Convert.ToInt32(lvlist.SelectedItems[0].Text);FrmEditStu frm = new FrmEditStu();frm.stuno = sno;frm.frmselect = this;frm.Show();}

5.添加学生信息(FrmEditStu)

修改学生信息:

 

删除学生信息:

 

 

添加到数据库:

  private void btnSave_Click(object sender, EventArgs e){//接收到的学号//判断学号是否为空来选择sql语句//判断是否要删除信息if (sno!=0){DialogResult result=MessageBox.Show("是否删除?","提示",MessageBoxButtons.YesNo,MessageBoxIcon.Error);if (result==DialogResult.Yes){//删除this.Hide();ChangDelete();}}if (stuno!=0){//修改this.Hide();GetUpdate();}            else{//新增this.Hide();GetSave();}                  }          //判断stuno是否有值来修改select语句//新增public void GetSave(){string pwd = txtpwd.Text;//密码string pwdTrue = txtPwdTrue.Text;//确认密码string name = txtStuName.Text;//学生名string stuGender = string.Empty;//取单选列表if (rbtnGenderTure.Checked){stuGender = "1";}else{stuGender = "0";}//给下拉框取值int gid = GetIdByName();string phone = txtPhone.Text;//电话string address = txtAddress.Text;//地址DateTime dt = dtBirthday.Value;//日期string stuEmail = txtEmail.Text;//邮箱//StudentNo, LoginPwd, StudentName, Gender, GradeId, Phone, Address, Birthday, Emailstring sql = "insert into student values('" + pwd + "','" + name + "','" + stuGender + "'," + gid + ",'" + phone + "','" + address + "','" + dt + "','" + stuEmail + "')";string str = "Data source=.;initial catalog=MySchool;uid=sa";SqlConnection con = new SqlConnection(str);SqlCommand cmd = new SqlCommand(sql, con);con.Open();if (pwd.Equals(pwdTrue)){int count = cmd.ExecuteNonQuery();if (count > 0){frmselect.UpdateSelect();MessageBox.Show("成功!");}con.Close();}else{MessageBox.Show("前后密码不匹配");}       }//修改public void GetUpdate(){               string name = txtStuName.Text;//学生名string stuGender = string.Empty;//取单选列表if (rbtnGenderTure.Checked){stuGender = "1";}else{stuGender = "0";}//给下拉框取值int gid = GetIdByName();string phone = txtPhone.Text;//电话string address = txtAddress.Text;//地址DateTime dt = dtBirthday.Value;//日期string stuEmail = txtEmail.Text;//邮箱//StudentNo, LoginPwd, StudentName, Gender, GradeId, Phone, Address, Birthday, Emailstring sql = @"update student set studentname='" + name +"',gender='" + stuGender + "',gradeid='" + gid + "',phone='" +phone + "',address='"+address+"',birthday='"+dt+"',email='"+stuEmail+"' where studentno="+txtStuNo.Text+"";        string str = "Data source=.;initial catalog=MySchool;uid=sa";SqlConnection con = new SqlConnection(str);SqlCommand cmd = new SqlCommand(sql, con);con.Open();                             int count = cmd.ExecuteNonQuery();con.Close();if (count > 0){frmselect.UpdateSelect();MessageBox.Show("成功!");}                                             }//删除public void ChangDelete(){string pwd = txtpwd.Text;//密码string pwdTrue = txtPwdTrue.Text;//确认密码string name = txtStuName.Text;//学生名string stuGender = string.Empty;//取单选列表if (rbtnGenderTure.Checked){stuGender = "1";}else{stuGender = "0";}//给下拉框取值int gid = GetIdByName();string phone = txtPhone.Text;//电话string address = txtAddress.Text;//地址DateTime dt = dtBirthday.Value;//日期string stuEmail = txtEmail.Text;//邮箱//StudentNo, LoginPwd, StudentName, Gender, GradeId, Phone, Address, Birthday, Emailstring sql = @"delete from student where studentno='"+txtStuNo.Text+"' ";string str = "Data source=.;initial catalog=MySchool;uid=sa";SqlConnection con = new SqlConnection(str);SqlCommand cmd = new SqlCommand(sql, con);con.Open();if (pwd.Equals(pwdTrue)){int count = cmd.ExecuteNonQuery();if (count > 0){frmselect.UpdateSelect();MessageBox.Show("成功!");}}else{MessageBox.Show("前后密码不匹配");}con.Close();}//根据对应条件查询班级idpublic int GetIdByName(){string str = "Data source=.;initial catalog=MySchool;uid=sa";SqlConnection con = new SqlConnection(str);string sql = "select gradeid from grade where gradename='"+cmbGrade.Text+"'";SqlCommand cmd = new SqlCommand(sql, con);int gid = 0;try{con.Open();gid =Convert.ToInt32(cmd.ExecuteScalar());}catch (Exception){MessageBox.Show("网络异常");}finally{con.Close();}return gid;}//根据对应条件查询班级gnamepublic string GetNameById(int gid){string str = "Data source=.;initial catalog=MySchool;uid=sa";SqlConnection con = new SqlConnection(str);string sql = "select gradename from grade where gradeid=" + gid + "";SqlCommand cmd = new SqlCommand(sql, con);string name = "";try{con.Open();name =cmd.ExecuteScalar().ToString();}catch (Exception){MessageBox.Show("网络异常");}finally{con.Close();}return name;}//加载年级下拉框public void LoadGrade(){//拿到所有年级名称string str = "Data source=.;Initial catalog=MySchool;uid=sa";SqlConnection con = new SqlConnection(str);string sql = "select gradename from grade";SqlCommand cmd = new SqlCommand(sql, con);try{con.Open();SqlDataReader dr = cmd.ExecuteReader();if (dr != null){if (dr.HasRows){while (dr.Read()){string gname = dr["gradename"].ToString();//每读到一个年级名称,我就将"S1",添加到下拉框
                                 cmbGrade.Items.Add(gname);}}}}catch (Exception ex){MessageBox.Show("网络异常");}finally{con.Close();}}//根据学号加载其他信息public void LoadStuInfoByStuNo(){string str = "Data source=.;Initial catalog=MySchool;uid=sa";SqlConnection con = new SqlConnection(str);string sql = "select * from student where studentno="+stuno+"";SqlCommand cmd = new SqlCommand(sql, con);try{con.Open();SqlDataReader dr = cmd.ExecuteReader();txtStuNo.Text = stuno.ToString();if (dr!=null){if (dr.HasRows){while (dr.Read()){string stuname = dr["studentname"].ToString();txtStuName.Text = stuname;//姓名string stuGender = dr["gender"].ToString();if (stuGender == "1"){rbtnGenderTure.Checked = true;}else if (stuGender == "0"){rbtnGender.Checked = true;}//性别int gid = Convert.ToInt32(dr["gradeid"]);string gname = GetNameById(gid);cmbGrade.Text = gname;//年级string stuphone = dr["phone"].ToString();txtPhone.Text = stuphone;//电话string stuaddress = dr["address"].ToString();txtAddress.Text = stuaddress;//地址string stuemail = dr["email"].ToString();txtEmail.Text = stuemail;//邮箱DateTime stubirthday = Convert.ToDateTime(dr["birthday"]);dtBirthday.Value = stubirthday;//出生日期    
                             }}}}catch (Exception){MessageBox.Show("异常!!"); ;}finally {}}private void FrmEditStu_Load(object sender, EventArgs e){   //判断学号是否为空来选择sql语句if ( sno != 0){DialogResult result = MessageBox.Show("是否删除?", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Error);if (result == DialogResult.Yes){this.Text = "删除学生信息";btnSave.Text = "删除";LoadStuInfoByStuNo();}}if(stuno!=0){this.Text = "修改学生信息";btnSave.Text = "修改";LoadStuInfoByStuNo();}           else{btnSave.Text = "保存";LoadGrade();}}private void FrmEditStu_FormClosing(object sender, FormClosingEventArgs e){Application.Exit();}private void btnClear_Click(object sender, EventArgs e){this.Close();}

6.动态图片时钟

计时控件:

通过时间来让几张图连接形成动态的计时:

  private int index = 0;private void timers_Tick(object sender, EventArgs e){if (index<imglist.Images.Count-1){index++;}else{index = 0;}piclist.Image = imglist.Images[index];}

      WinForms很重要,虽说难度不是很大,但它的内容太多,之间的融合又太复杂,所以难易与否只有自己知道,但只要认真听课、刻苦学习,我想时间会给我们大家最好的结果,所以我希望大家能指出我的一些不足之处,相信我们的互帮互助能让我们都变得更好。

转载于:https://www.cnblogs.com/bdpsc/p/5001955.html

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