void RefreshCourseData()
{
string sqlStr;
sqlStr = "select * from tb_course where csemester='" + cmbSemester.Text.Trim() + "'";
DataSet ds = new DataSet();
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvCourse.DataSource = ds.Tables[0];
dgrdvCourse.Columns[0].HeaderText = "课程号";
dgrdvCourse.Columns[0].Width = 100;
dgrdvCourse.Columns[1].HeaderText = "课程名";
dgrdvCourse.Columns[1].Width = 130;
dgrdvCourse.Columns[2].HeaderText = "学分";
dgrdvCourse.Columns[2].Width = 50;
dgrdvCourse.Columns[3].HeaderText = "学时";
dgrdvCourse.Columns[3].Width = 50;
dgrdvCourse.Columns[4].HeaderText = "课程学期";
dgrdvCourse.Columns[4].Width = 130;
}
else
{
dgrdvCourse.DataSource = null;
}
}
private void cmbSemester_SelectedIndexChanged_1(object sender, EventArgs e)
{
cmbCourse.SelectedIndex = -1;
string sqlStr = "select tb_grade.sno,tb_student.sname,tb_grade.cno,tb_course.cname,tb_course.cperiod,tb_course.csemester,tb_grade.grade from tb_student inner join tb_grade on tb_student.sno = tb_grade.sno join tb_course on tb_grade.cno = tb_course.cno where tb_course.csemester='" + cmbSemester.Text.Trim() + "'";
DataSet ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvGrade.DataSource = ds.Tables[0];
dgrdvGrade.Columns[0].HeaderText = "学号";
dgrdvGrade.Columns[0].Width = 100;
dgrdvGrade.Columns[1].HeaderText = "姓名";
dgrdvGrade.Columns[1].Width = 150;
dgrdvGrade.Columns[2].HeaderText = "课程号";
dgrdvGrade.Columns[2].Width = 100;
dgrdvGrade.Columns[3].HeaderText = "课程名";
dgrdvGrade.Columns[3].Width = 150;
dgrdvGrade.Columns[4].HeaderText = "学分";
dgrdvGrade.Columns[4].Width = 100;
dgrdvGrade.Columns[5].HeaderText = "开课学期";
dgrdvGrade.Columns[5].Width = 150;
dgrdvGrade.Columns[6].HeaderText = "成绩";
dgrdvGrade.Columns[6].Width = 100;
dgrdvGrade_RowHeaderMouseClick(null, null);
}
else
{
dgrdvGrade.DataSource = null;
//MessageBox.Show("暂无该学期成绩", "提示");
}
}
//更新表
void RefreshData()
{
string sqlStr;
DataSet ds = new DataSet();
sqlStr = "select * from tb_Student";
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvStudent.DataSource = ds.Tables[0];
dgrdvStudent.Columns[0].HeaderText = "学生学号";
dgrdvStudent.Columns[0].Width = 168;
dgrdvStudent.Columns[1].HeaderText = "学生姓名";
dgrdvStudent.Columns[1].Width = 159;
dgrdvStudent.Columns[2].HeaderText = "学生性别";
dgrdvStudent.Columns[2].Width = 88;
dgrdvStudent.Columns[3].HeaderText = "学生年龄";
dgrdvStudent.Columns[3].Width = 88;
dgrdvStudent.Columns[4].HeaderText = "学生班级";
dgrdvStudent.Columns[4].Width = 100;
dgrdvStudent.Columns[5].HeaderText = "所在学院（系别）";
dgrdvStudent.Columns[5].Width = 159;
dgrdvStudent_RowHeaderMouseClick(null, null);
}
else
{
dgrdvStudent.DataSource = null;
}
}
private void btnSelect_Click(object sender, EventArgs e)
{
try
{
if (dgrdvCourse.DataSource == null)
{
MessageBox.Show("没有课程可选", "提示");
return;
}
int n = dgrdvCourse.CurrentCell.RowIndex;
int i = dgrdvclass.CurrentCell.RowIndex;
string selectCno, classno;
classno = dgrdvclass[0, i].Value.ToString().Trim();
selectCno = dgrdvCourse[0, n].Value.ToString().Trim();
string sqlStr;
sqlStr = "select * from tb_select where classno='" + classno + "'" + "and Cno='" + selectCno + "'";
if (CDataBase.GetDataFromDB(sqlStr) != null)
{
MessageBox.Show("已选该课程!", "不能重选", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
sqlStr = "insert into tb_select (classNo,Cno) values ('" + classno + "','" + selectCno + "')";
CDataBase.UpdateDB(sqlStr);
RefreshSelcetCourseData();
MessageBox.Show("选课成功", "提示");
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
//删除
private void btnDelete_Click(object sender, EventArgs e)
{
try
{
if (MessageBox.Show("确定要删除“" + txtSno.Text.Trim() + "”的资料吗?", "提示", MessageBoxButtons.YesNo,
MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.Yes)
{
string sqlStr = "delete from tb_grade where sno='" + txtSno.Text.Trim() + "'";
CDataBase.UpdateDB(sqlStr);
int n = dgrdvGrade.CurrentCell.RowIndex;
dgrdvGrade.Rows.RemoveAt(n);
if (dgrdvGrade.Rows.Count == 1)
{
cleraAll();
dgrdvGrade.DataSource = null;
}
else
{
dgrdvGrade_RowHeaderMouseClick(null, null);
}
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
void RefreshData()
{
string sqlStr;
DataSet ds = new DataSet();
sqlStr = "select * from tb_Course";
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvCourse.DataSource = ds.Tables[0];
dgrdvCourse.Columns[0].HeaderText = "课程号";
dgrdvCourse.Columns[0].Width = 150;
dgrdvCourse.Columns[1].HeaderText = "课程名";
dgrdvCourse.Columns[1].Width = 200;
dgrdvCourse.Columns[2].HeaderText = "课程学分";
dgrdvCourse.Columns[2].Width = 80;
dgrdvCourse.Columns[3].HeaderText = "课程学时";
dgrdvCourse.Columns[3].Width = 80;
dgrdvCourse.Columns[4].HeaderText = "开课学期";
dgrdvCourse.Columns[4].Width = 150;
dgrdvCourse_RowHeaderMouseClick(null, null);
}
else
{
dgrdvCourse.DataSource = null;
}
}
void RefreshData()
{
string sqlStr;
sqlStr = "select tb_grade.sno,tb_student.sname,tb_grade.cno,tb_course.cname,tb_course.cperiod,tb_course.csemester,tb_grade.grade from tb_student inner join tb_grade on tb_student.sno = tb_grade.sno join tb_course on tb_grade.cno = tb_course.cno where tb_course.csemester='" + cmbSemester.Text.Trim() + "' and tb_grade.sno='" + CPublic.userInfo[0] + "'";
DataSet ds = new DataSet();
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvGrade.DataSource = ds.Tables[0];
dgrdvGrade.Columns[0].HeaderText = "学号";
dgrdvGrade.Columns[0].Width = 50;
dgrdvGrade.Columns[1].HeaderText = "姓名";
dgrdvGrade.Columns[1].Width = 80;
dgrdvGrade.Columns[2].HeaderText = "课程号";
dgrdvGrade.Columns[2].Width = 70;
dgrdvGrade.Columns[3].HeaderText = "课程名";
dgrdvGrade.Columns[3].Width = 100;
dgrdvGrade.Columns[4].HeaderText = "学分";
dgrdvGrade.Columns[4].Width = 50;
dgrdvGrade.Columns[5].HeaderText = "开课学期";
dgrdvGrade.Columns[5].Width = 100;
dgrdvGrade.Columns[6].HeaderText = "成绩";
dgrdvGrade.Columns[6].Width = 50;
//dgrdvGrade_RowHeaderMouseClick(null, null);
}
else
{
dgrdvGrade.DataSource = null;
MessageBox.Show("暂无该学期成绩", "提示");
}
}
//修改
private void btnUpdate_Click(object sender, EventArgs e)
{
try
{
if (btnUpdate.Text == "修改")
{
btnUpdate.Text = "确定";
btnAdd.Enabled = false;
btnDelete.Enabled = false;
txtSno.Enabled = false;
txtCno.Enabled = false;
txtGarde.Enabled = true;
txtGarde.Text = "";
txtGarde.Focus();
}
else
{
btnUpdate.Text = "修改";
btnAdd.Enabled = true;
btnDelete.Enabled = true;
txtSno.Enabled = false;
txtCno.Enabled = false;
txtGarde.Enabled = false;
string sqlStr;
sqlStr = "update tb_grade set grade='" + txtGarde.Text.Trim() + "'where sno='" + txtSno.Text.Trim() + "'";
CDataBase.UpdateDB(sqlStr);
RefreshData();
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
private void btnAll_Click(object sender, EventArgs e)
{
cmbCourse.SelectedIndex = -1;
cmbSemester.SelectedIndex = -1;
string sqlStr;
sqlStr = "select tb_grade.sno,tb_student.sname,tb_grade.cno,tb_course.cname,tb_course.cperiod,tb_course.csemester,tb_grade.grade from tb_student inner join tb_grade on tb_student.sno = tb_grade.sno join tb_course on tb_grade.cno = tb_course.cno";
DataSet ds = new DataSet();
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvGrade.DataSource = ds.Tables[0];
dgrdvGrade.Columns[0].HeaderText = "学号";
dgrdvGrade.Columns[0].Width = 100;
dgrdvGrade.Columns[1].HeaderText = "姓名";
dgrdvGrade.Columns[1].Width = 150;
dgrdvGrade.Columns[2].HeaderText = "课程号";
dgrdvGrade.Columns[2].Width = 100;
dgrdvGrade.Columns[3].HeaderText = "课程名";
dgrdvGrade.Columns[3].Width = 150;
dgrdvGrade.Columns[4].HeaderText = "学分";
dgrdvGrade.Columns[4].Width = 100;
dgrdvGrade.Columns[5].HeaderText = "开课学期";
dgrdvGrade.Columns[5].Width = 150;
dgrdvGrade.Columns[6].HeaderText = "成绩";
dgrdvGrade.Columns[6].Width = 100;
dgrdvGrade_RowHeaderMouseClick(null, null);
}
else
{
dgrdvGrade.DataSource = null;
}
}
private void btnSelect_Click(object sender, EventArgs e)
{
try
{
if (txtUserName.Text.Trim() == "")
{
MessageBox.Show("请输入要查询用户的关键字", "提示");
txtUserName.Focus();
return;
}
string sqlStr = "select * from tb_user where userName='******'";
DataSet ds = new DataSet();
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
txtUserName.Text = "";
dataGridView1.DataSource = ds.Tables[0];
SetHeadText();
}
else
{
dataGridView1.DataSource = null;
txtUserName.Text = "";
MessageBox.Show("没有该用户", "提示");
RefreshData();
SetHeadText();
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
private void btnDelete_Click(object sender, EventArgs e)
{
try
{
if (dgrdvSelectCourse.DataSource == null)
{
MessageBox.Show("没有可删除的选课记录!", "提示");
return;
}
int n = dgrdvSelectCourse.CurrentCell.RowIndex;
string classNo, selectCno, selectCname;
classNo = dgrdvSelectCourse[0, n].Value.ToString().Trim();
selectCno = dgrdvSelectCourse[2, n].Value.ToString().Trim();
selectCname = dgrdvSelectCourse[3, n].Value.ToString().Trim();
if (MessageBox.Show("确定要删除“" + classNo + "”的所选课程《" + selectCname + "》吗?", "删除选课记录",
MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.Yes)
{
string sqlStr;
sqlStr = "delete from tb_select where classno='" + classNo + "'" + "and Cno='" + selectCno + "'";
CDataBase.UpdateDB(sqlStr);
dgrdvSelectCourse.Rows.RemoveAt(n);
if (dgrdvSelectCourse.Rows.Count == 1)
{
dgrdvSelectCourse.DataSource = null;
}
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
//统计
private void btnItemize_Click(object sender, EventArgs e)
{
try
{
if (cmbCount.Text.Trim() == "")
{
MessageBox.Show("请输入统计条件!", "提示!");
cmbCount.Focus();
}
else if (cmbCount.SelectedIndex == 5)
{
if (txtCountValue1.Text.Trim() == "" & txtCountValue2.Text.Trim() == "")
{
MessageBox.Show("请输入统计条件或统计值!", "提示!");
cmbCount.Focus();
}
}
string sqlStr;
sqlStr = "select tb_grade.sno,tb_student.sname,tb_grade.cno,tb_course.cname,tb_course.cperiod,tb_course.csemester,tb_grade.grade from tb_student inner join tb_grade on tb_student.sno = tb_grade.sno join tb_course on tb_grade.cno = tb_course.cno where tb_course.cname='" + cmbCourse.Text.Trim() + "' and grade between '" + txtCountValue2.Text.Trim() + "' and '" + txtCountValue1.Text.Trim() + "'";
DataSet ds = new DataSet();
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvGrade.DataSource = ds.Tables[0];
dgrdvGrade.Columns[0].HeaderText = "学号";
dgrdvGrade.Columns[0].Width = 100;
dgrdvGrade.Columns[1].HeaderText = "姓名";
dgrdvGrade.Columns[1].Width = 150;
dgrdvGrade.Columns[2].HeaderText = "课程号";
dgrdvGrade.Columns[2].Width = 100;
dgrdvGrade.Columns[3].HeaderText = "课程名";
dgrdvGrade.Columns[3].Width = 150;
dgrdvGrade.Columns[4].HeaderText = "学分";
dgrdvGrade.Columns[4].Width = 100;
dgrdvGrade.Columns[5].HeaderText = "开课学期";
dgrdvGrade.Columns[5].Width = 150;
dgrdvGrade.Columns[6].HeaderText = "成绩";
dgrdvGrade.Columns[6].Width = 100;
dgrdvGrade_RowHeaderMouseClick(null, null);
}
else
{
dgrdvGrade.DataSource = null;
txtCountValue1.Text = "";
txtCountValue2.Text = "";
MessageBox.Show("无此类信息", "提示");
cmbCourse.Focus();
RefreshData();
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
private void btnAlter_Click(object sender, EventArgs e)
{
try
{
string sqlStr = "update tb_user set userPurview='" + cmbPurivew.Text.Trim() + "'" + "where userName='******'";
CDataBase.UpdateDB(sqlStr);
RefreshData();
SetHeadText();
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
//用于显示同步数据
void RefreshData()
{
DataSet myDs = new DataSet();
string sqlStr = "select userName,userPurview from tb_User";
myDs = CDataBase.GetDataFromDB(sqlStr);
if (myDs != null)
{
dataGridView1.DataSource = myDs.Tables[0];
SetHeadText();
}
else
{
dataGridView1.DataSource = null;
}
}
//窗体载入
private void btnRegedit_Click_1(object sender, EventArgs e)
{
try
{
if (btnRegedit.Text == "注册")
{
btnRegedit.Text = "确定";
ObjOpen();
}
else if (txtUserName.Text.Trim() == "")
{
MessageBox.Show("用户名不能为空!", "提示");
txtUserName.Focus();
}
else if (txtUserPasswors.Text.Trim() == "")
{
MessageBox.Show("用户名不能为空!", "提示");
txtUserPasswors.Focus();
}
else if (!UserName(txtUserName.Text.Trim()))
{
MessageBox.Show("该用户已存在,请使用其他账号注册!", "提示");
txtUserName.Text = "";
ClearAll();
}
else
{
btnRegedit.Text = "注册";
string sqlStr = "insert into tb_User values('" + txtUserName.Text.Trim() + "','" + txtUserPasswors.Text.Trim() + "','" + cmbPurview1.Text.Trim() + "','是')";
if (CDataBase.UpdateDB(sqlStr))
{
MessageBox.Show(cmbPurview1.Text + " " + txtUserName.Text + "注册成功!", "注册用户");
}
ClearAll();
ObjClose();
//btnCancel.Enabled = false;
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
ClearAll();
ObjClose();
}
}
//修改
private void btnUpdate_Click(object sender, EventArgs e)
{
try
{
if (btnUpdate.Text.Trim() == "修改")
{
MessageBox.Show("学号不能修改", "注意");
btnUpdate.Text = "确定";
btnCancel2.Visible = true;
btnAdd.Enabled = false;
btnDelete.Enabled = false;
btnClose.Enabled = false;
cmbSelect.Enabled = false;
btnSelect.Enabled = false;
txtSelect.Enabled = false;
txtName.Enabled = true;
txtAge.Enabled = true;
txtClass.Enabled = true;
txtDept.Enabled = true;
cmbSex.Enabled = true;
txtName.Focus();
}
else
{
btnUpdate.Text = "修改";
btnCancel2.Visible = false;
btnAdd.Enabled = true;
btnDelete.Enabled = true;
btnClose.Enabled = true;
cmbSelect.Enabled = true;
btnSelect.Enabled = true;
Objclose();
string sqlStr;
sqlStr = "update tb_student set Sname='" + txtName.Text.Trim() + "',Ssex='" + cmbSex.Text.Trim() + "',Sage='"
+ txtAge.Text.Trim() + "',Sclass='" + txtClass.Text.Trim() + "',Sdept='" + txtDept.Text.Trim() + "'where sno='"
+ txtNo.Text.Trim() + "'";
CDataBase.UpdateDB(sqlStr);
RefreshData();
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
//进入窗体
private void FrmGrade_Load(object sender, EventArgs e)
{
try
{
txtGarde.Enabled = false;
txtCountValue1.Enabled = false;
txtCountValue2.Enabled = false;
cmbCourse.SelectedIndex = 0;
objClose();
cmbCourse.SelectedIndex = -1;
string sqlStr;
sqlStr = "select tb_grade.sno,tb_student.sname,tb_grade.cno,tb_course.cname,tb_course.cperiod,tb_course.csemester,tb_grade.grade from tb_student inner join tb_grade on tb_student.sno = tb_grade.sno join tb_course on tb_grade.cno = tb_course.cno";
DataSet ds = new DataSet();
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvGrade.DataSource = ds.Tables[0];
dgrdvGrade.Columns[0].HeaderText = "学号";
dgrdvGrade.Columns[0].Width = 100;
dgrdvGrade.Columns[1].HeaderText = "姓名";
dgrdvGrade.Columns[1].Width = 150;
dgrdvGrade.Columns[2].HeaderText = "课程号";
dgrdvGrade.Columns[2].Width = 100;
dgrdvGrade.Columns[3].HeaderText = "课程名";
dgrdvGrade.Columns[3].Width = 150;
dgrdvGrade.Columns[4].HeaderText = "学分";
dgrdvGrade.Columns[4].Width = 100;
dgrdvGrade.Columns[5].HeaderText = "开课学期";
dgrdvGrade.Columns[5].Width = 150;
dgrdvGrade.Columns[6].HeaderText = "成绩";
dgrdvGrade.Columns[6].Width = 100;
dgrdvGrade_RowHeaderMouseClick(null, null);
}
else
{
dgrdvGrade.DataSource = null;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
//删除
private void btnDelete_Click(object sender, EventArgs e)
{
try
{
//RefreshData();
string userName;
int n = this.dataGridView1.CurrentCell.RowIndex;
userName = this.dataGridView1.Rows[n].Cells[0].Value.ToString().Trim();
if (MessageBox.Show("确认删除 " + userName + " 吗?", "删除用户", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2) == DialogResult.Yes)
{
string sqlStr = "delete from tb_User where userName='******'";
CDataBase.UpdateDB(sqlStr);
dataGridView1.Rows.RemoveAt(n);
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
//string selectCondition;
void RefreshClass()
{
string sqlStr;
sqlStr = "select * from tb_class where classname='" + cmbClass.Text.Trim() + "'";
DataSet ds = new DataSet();
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvclass.DataSource = ds.Tables[0];
dgrdvclass.Columns[0].HeaderText = "班级号";
dgrdvclass.Columns[0].Width = 70;
dgrdvclass.Columns[1].HeaderText = "班级名";
dgrdvclass.Columns[1].Width = 90;
}
else
{
dgrdvCourse.DataSource = null;
}
}
private void btnDelete_Click(object sender, EventArgs e)
{
try
{
if (txtNo.Text.Trim() == "")
{
MessageBox.Show("木有可删除的记录", "提示");
return;
}
string sqlStr;
sqlStr = "select * from tb_Select where cno='" + txtNo.Text.Trim() + "'";
if (CDataBase.GetDataFromDB(sqlStr) != null)
{
MessageBox.Show("已有该课程的选课信息,拒绝删除!", "删除出错", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else if (MessageBox.Show("确定删除课程“" + txtName.Text.Trim() + "”吗?", "删除课程信息", MessageBoxButtons.YesNo, MessageBoxIcon.Question,
MessageBoxDefaultButton.Button2) == DialogResult.Yes)
{
sqlStr = "delete from tb_course where cno='" + txtNo.Text.Trim() + "'";
CDataBase.UpdateDB(sqlStr);
int n = dgrdvCourse.CurrentCell.RowIndex;
dgrdvCourse.Rows.RemoveAt(n);
if (dgrdvCourse.Rows.Count == 1)
{
ClearAll();
dgrdvCourse.DataSource = null;
}
else
{
dgrdvCourse_RowHeaderMouseClick(null, null);
}
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
void RefreshData()
{
string sqlStr;
//int n = dgrdvGrade.CurrentCell.RowIndex;
//string gardeName;
//gardeName = dgrdvGrade[1, n].Value.ToString().Trim();
//lblShow.Text = "现在正在查看“" + gardeName + "”的成绩";
sqlStr = "select tb_grade.sno,tb_student.sname,tb_grade.cno,tb_course.cname,tb_course.cperiod,tb_course.csemester,tb_grade.grade from tb_student inner join tb_grade on tb_student.sno = tb_grade.sno join tb_course on tb_grade.cno = tb_course.cno where tb_course.cname='" + cmbCourse.Text.Trim() + "'";
DataSet ds = new DataSet();
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvGrade.DataSource = ds.Tables[0];
dgrdvGrade.Columns[0].HeaderText = "学号";
dgrdvGrade.Columns[0].Width = 100;
dgrdvGrade.Columns[1].HeaderText = "姓名";
dgrdvGrade.Columns[1].Width = 150;
dgrdvGrade.Columns[2].HeaderText = "课程号";
dgrdvGrade.Columns[2].Width = 100;
dgrdvGrade.Columns[3].HeaderText = "课程名";
dgrdvGrade.Columns[3].Width = 150;
dgrdvGrade.Columns[4].HeaderText = "学分";
dgrdvGrade.Columns[4].Width = 100;
dgrdvGrade.Columns[5].HeaderText = "开课学期";
dgrdvGrade.Columns[5].Width = 150;
dgrdvGrade.Columns[6].HeaderText = "成绩";
dgrdvGrade.Columns[6].Width = 100;
dgrdvGrade_RowHeaderMouseClick(null, null);
}
else
{
dgrdvGrade.DataSource = null;
//MessageBox.Show("暂无此课程信息", "提示");
}
}
private void FrmSelectCourse_Load(object sender, EventArgs e)
{
try
{
cmbSemester.SelectedIndex = 0;
cmbClass.SelectedIndex = 0;
string sqlStr;
DataSet ds = new DataSet();
sqlStr = "select * from tb_course";
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvCourse.DataSource = ds.Tables[0];
dgrdvCourse.Columns[0].HeaderText = "课程号";
dgrdvCourse.Columns[0].Width = 100;
dgrdvCourse.Columns[1].HeaderText = "课程名";
dgrdvCourse.Columns[1].Width = 130;
dgrdvCourse.Columns[2].HeaderText = "学分";
dgrdvCourse.Columns[2].Width = 50;
dgrdvCourse.Columns[3].HeaderText = "学时";
dgrdvCourse.Columns[3].Width = 50;
dgrdvCourse.Columns[4].HeaderText = "课程学期";
dgrdvCourse.Columns[4].Width = 130;
}
else
{
dgrdvCourse.DataSource = null;
}
RefreshCourseData();
RefreshClass();
RefreshSelcetCourseData();
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
void RefreshSelcetCourseData()
{
string sqlStr, classCno;
int i = dgrdvclass.CurrentCell.RowIndex;
classCno = dgrdvclass[0, i].Value.ToString().Trim();
//sqlStr = "select tb_select.classNo,tb_class.classname,tb_select.classno,tb_course.Cname,tb_course.csemester"
//+ "from tb_class inner join(tb_course inner join tb_select on tb_course.cno=tb_select.cno)"
//+ "on tb_class.classno =tb_select.classno where tb_select.classno='"
//+ classCno + "'";
sqlStr = "select tb_select.classNo,tb_class.classname,tb_Course.cno,tb_course.Cname,tb_course.cperiod,tb_course.csemester from tb_class inner join(tb_course inner join tb_select on tb_course.cno=tb_select.cno) on tb_class.classno =tb_select.classno where tb_select.classno='" + classCno + "'";
DataSet ds = new DataSet();
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvSelectCourse.DataSource = ds.Tables[0];
dgrdvSelectCourse.Columns[0].HeaderText = "班级号";
dgrdvSelectCourse.Columns[0].Width = 130;
dgrdvSelectCourse.Columns[1].HeaderText = "班级名";
dgrdvSelectCourse.Columns[1].Width = 130;
dgrdvSelectCourse.Columns[2].HeaderText = "课程号";
dgrdvSelectCourse.Columns[2].Width = 130;
dgrdvSelectCourse.Columns[3].HeaderText = "课程名";
dgrdvSelectCourse.Columns[3].Width = 130;
dgrdvSelectCourse.Columns[4].HeaderText = "课程学时";
dgrdvSelectCourse.Columns[4].Width = 130;
dgrdvSelectCourse.Columns[5].HeaderText = "课程学期";
dgrdvSelectCourse.Columns[5].Width = 130;
}
else
{
dgrdvSelectCourse.DataSource = null;
}
}
//修改
private void btnUpdata_Click(object sender, EventArgs e) //为什么课程号不能修改?——要用课程号作为修改条件
{
try
{
if (btnUpdata.Text == "修改")
{
btnUpdata.Text = "确定";
btnCancel2.Visible = true;
ObjOpen();
txtNo.Enabled = false;
btnAdd.Enabled = false;
btnDelete.Enabled = false;
dgrdvCourse.Enabled = false;
txtName.Focus();
}
else
{
btnUpdata.Text = "修改";
btnCancel2.Visible = false;
btnAdd.Enabled = true;
btnDelete.Enabled = true;
dgrdvCourse.Enabled = true;
ObjClose();
string sqlStr;
sqlStr = "update tb_Course set Cname='" + txtName.Text.Trim() + "',Ccredit='" + txtCredit.Text.Trim()
+ "',Cperiod='" + txtPeriod.Text.Trim() + "',Csemester='" + cmbSemester.Text.Trim() + "'where Cno='" + txtNo.Text.Trim() + "'";
CDataBase.UpdateDB(sqlStr);
RefreshData();
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
private void btnEnter_Click(object sender, EventArgs e)
{
try
{
if (txtOldPassWord.Text == "")
{
MessageBox.Show("请输入原密码!", "提示");
txtOldPassWord.Focus();
}
else if (txtNewPassWord.Text == "")
{
MessageBox.Show("请输入新密码", "提示");
txtNewPassWord.Focus();
}
else if (txtMatcPassWord.Text == "")
{
MessageBox.Show("请再次输入密码", "提示");
txtMatcPassWord.Focus();
}
else if (txtNewPassWord.Text.Trim() == txtMatcPassWord.Text.Trim())
{
string sql = "select userpassword from tb_User where username='******'";
DataSet ds = new DataSet();
CDataBase.conn.ConnectionString = CDataBase.connStr;
CDataBase.conn.Open();
//SqlCommand cmd = new SqlCommand(sql, CDataBase.conn);
//SqlDataReader sdr = cmd.ExecuteReader();
SqlDataAdapter adapter = new SqlDataAdapter(sql, CDataBase.conn);
adapter.Fill(ds);
if (ds.Tables[0].Rows[0].ItemArray[0].ToString().Trim() == txtOldPassWord.Text.Trim())
{
string sqlStr;
CDataBase.conn.Close();
sqlStr = "update tb_User set userPassword='******'"
+ "where userName ='******'";
if (CDataBase.UpdateDB(sqlStr))
{
MessageBox.Show("修改成功!", "提示");
}
CleaAll();
}
else
{
MessageBox.Show("原密码错误", "提示");
CleaAll();
txtOldPassWord.Focus();
}
}
else
{
MessageBox.Show("两次密码输入不一样，重新输入!", "提示");
txtNewPassWord.Text = "";
txtMatcPassWord.Text = "";
txtNewPassWord.Focus();
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
//排序
private void btnSort_Click(object sender, EventArgs e)
{
try
{
//if (cmbSort.Text.Trim() == "")
//{
// MessageBox.Show("请选择排序条件", "提示");
// cmbSort.Focus();
//}
string sqlStr1;
//, sqlStr2;
sqlStr1 = "select tb_grade.sno,tb_student.sname,tb_grade.cno,tb_course.cname,tb_course.cperiod,tb_course.csemester,tb_grade.grade from tb_student inner join tb_grade on tb_student.sno = tb_grade.sno join tb_course on tb_grade.cno = tb_course.cno where tb_course.cname='" + cmbCourse.Text.Trim() + "' ORDER BY grade DESC";
//sqlStr2 = "select tb_grade.sno,tb_student.sname,tb_grade.cno,tb_course.cname,tb_course.cperiod,tb_course.csemester,tb_grade.grade from tb_student inner join tb_grade on tb_student.sno = tb_grade.sno join tb_course on tb_grade.cno = tb_course.cno where tb_course.cname='" + cmbSemester.Text.Trim() + "' ORDER BY grade DESC";
DataSet ds = new DataSet();
//if (cmbSort.SelectedIndex == 0)
//{
ds = CDataBase.GetDataFromDB(sqlStr1);
if (ds != null)
{
dgrdvGrade.DataSource = ds.Tables[0];
dgrdvGrade.Columns[0].HeaderText = "学号";
dgrdvGrade.Columns[0].Width = 100;
dgrdvGrade.Columns[1].HeaderText = "姓名";
dgrdvGrade.Columns[1].Width = 150;
dgrdvGrade.Columns[2].HeaderText = "课程号";
dgrdvGrade.Columns[2].Width = 100;
dgrdvGrade.Columns[3].HeaderText = "课程名";
dgrdvGrade.Columns[3].Width = 150;
dgrdvGrade.Columns[4].HeaderText = "学分";
dgrdvGrade.Columns[4].Width = 100;
dgrdvGrade.Columns[5].HeaderText = "开课学期";
dgrdvGrade.Columns[5].Width = 150;
dgrdvGrade.Columns[6].HeaderText = "成绩";
dgrdvGrade.Columns[6].Width = 100;
dgrdvGrade_RowHeaderMouseClick(null, null);
}
}
//else if (cmbSort.SelectedIndex == 1)
//{
// ds = CDataBase.GetDataFromDB(sqlStr2);
// if (ds != null)
// {
// dgrdvGrade.DataSource = ds.Tables[0];
// dgrdvGrade.Columns[0].HeaderText = "学号";
// dgrdvGrade.Columns[0].Width = 100;
// dgrdvGrade.Columns[1].HeaderText = "姓名";
// dgrdvGrade.Columns[1].Width = 150;
// dgrdvGrade.Columns[2].HeaderText = "课程号";
// dgrdvGrade.Columns[2].Width = 100;
// dgrdvGrade.Columns[3].HeaderText = "课程名";
// dgrdvGrade.Columns[3].Width = 150;
// dgrdvGrade.Columns[4].HeaderText = "学分";
// dgrdvGrade.Columns[4].Width = 100;
// dgrdvGrade.Columns[5].HeaderText = "开课学期";
// dgrdvGrade.Columns[5].Width = 150;
// dgrdvGrade.Columns[6].HeaderText = "成绩";
// dgrdvGrade.Columns[6].Width = 100;
// dgrdvGrade_RowHeaderMouseClick(null, null);
// }
//}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
//添加
private void btnAdd_Click(object sender, EventArgs e)
{
try
{
if (btnAdd.Text.Trim() == "添加")
{
btnAdd.Text = "确定";
btnCancel1.Visible = true;
ObjOpen();
ClearAll();
RefreshData();
btnUpdata.Enabled = false;
btnDelete.Enabled = false;
dgrdvCourse.Enabled = false;
return;
}
else if (txtNo.Text.Trim() == "")
{
MessageBox.Show("课程号不能为空", "提示");
txtNo.Focus();
return;
}
else if (txtName.Text.Trim() == "")
{
MessageBox.Show("课程名不能为空", "提示");
txtName.Focus();
return;
}
else if (txtCredit.Text.Trim() == "")
{
MessageBox.Show("课程学分不能为空", "提示");
txtCredit.Focus();
return;
}
else if (txtPeriod.Text.Trim() == "")
{
MessageBox.Show("课程学时不能为空", "提示");
txtPeriod.Focus();
return;
}
else if (cmbSemester.SelectedIndex == -1)
{
MessageBox.Show("请选择开课学期", "提示");
cmbSemester.Focus();
return;
}
else if (!No(txtNo.Text.Trim()))
{
MessageBox.Show("该课程已有", "提示");
txtNo.Text = "";
txtNo.Focus();
return;
}
btnCancel1.Visible = false;
btnAdd.Text = "添加";
string sqlStr;
sqlStr = "insert into tb_Course values('" + txtNo.Text.Trim() + "','" + txtName.Text.Trim() + "','"
+ txtCredit.Text.Trim() + "','" + txtPeriod.Text.Trim() + "','" + cmbSemester.Text.Trim() + "')";
CDataBase.UpdateDB(sqlStr);
RefreshData();
if (MessageBox.Show("添加成功,继续添加吗?", "添加课程信息", MessageBoxButtons.YesNo, MessageBoxIcon.Question,
MessageBoxDefaultButton.Button1) == DialogResult.Yes)
{
btnCancel1.Visible = true;
ClearAll();
ObjOpen();
btnAdd.Text = "确定";
}
else
{
ObjClose();
btnUpdata.Enabled = false;
btnDelete.Enabled = false;
dgrdvCourse.Enabled = false;
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
ObjClose();
btnUpdata.Enabled = true;
btnDelete.Enabled = true;
dgrdvCourse.Enabled = true;
dgrdvCourse_RowHeaderMouseClick(null, null);
}
}
//录入
private void btnAdd_Click(object sender, EventArgs e)
{
try
{
string sql = "select sno,cno from tb_grade where sno='" + txtSno.Text.Trim() + "' and cno='" + txtCno.Text.Trim() + "'";
DataSet ds = new DataSet();
ds = CDataBase.GetDataFromDB(sql);
if (btnAdd.Text == "录入")
{
btnAdd.Text = "确定";
cleraAll();
txtSno.Text = "";
txtCno.Text = "";
txtGarde.Text = "";
objOpen();
btnUpdate.Enabled = false;
btnDelete.Enabled = false;
return;
}
else if (txtSno.Text == "")
{
MessageBox.Show("学号不能为空!", "提示");
txtSno.Focus();
return;
}
else if (txtCno.Text == "")
{
MessageBox.Show("课程号不能为空", "提示");
txtCno.Focus();
return;
}
else if (ds != null)
{
MessageBox.Show("该学生此成绩已存在,不能重复录入", "提示");
cleraAll();
txtSno.Focus();
}
btnAdd.Text = "录入";
string sqlStr;
sqlStr = "insert into tb_grade (Sno,Cno,grade) values ('" + txtSno.Text.Trim() + "','" + txtCno.Text.Trim()
+ "','" + txtGarde.Text.Trim() + "')";
CDataBase.UpdateDB(sqlStr);
RefreshData();
if (MessageBox.Show("录入成功,继续录入吗?", "录入成绩", MessageBoxButtons.YesNo, MessageBoxIcon.Question,
MessageBoxDefaultButton.Button1) == DialogResult.Yes)
{
cleraAll();
objOpen();
btnAdd.Text = "确定";
btnAll_Click(sender, e);
}
else
{
objClose();
btnUpdate.Enabled = true;
btnDelete.Enabled = true;
btnAll_Click(sender, e);
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
cleraAll();
objClose();
btnAdd.Enabled = true;
btnUpdate.Enabled = true;
btnDelete.Enabled = true;
dgrdvGrade_RowHeaderMouseClick(null, null);
}
}
//查询
private void btnSelect_Click(object sender, EventArgs e)
{
try
{
string sqlStr = "";
if (txtSelect.Text.Trim() == "")
{
MessageBox.Show("请输入需要查询的" + cmbSelect.SelectedItem.ToString().Trim() + "提示");
return;
}
else if (cmbSelect.SelectedIndex == 0)
{
sqlStr = "select * from tb_Student where Sno='" + txtSelect.Text.Trim() + "'";
}
else if (cmbSelect.SelectedIndex == 1)
{
sqlStr = "select * from tb_Student where Sname like'" + txtSelect.Text.Trim() + "%'";
}
else if (cmbSelect.SelectedIndex == 2)
{
sqlStr = "select * from tb_Student where Ssex='" + txtSelect.Text.Trim() + "'";
}
else if (cmbSelect.SelectedIndex == 3)
{
sqlStr = "select * from tb_Student where Sage='" + txtSelect.Text.Trim() + "'";
}
else if (cmbSelect.SelectedIndex == 4)
{
sqlStr = "select * from tb_Student where Sclass='" + txtSelect.Text.Trim() + "'";
}
else if (cmbSelect.SelectedIndex == 5)
{
sqlStr = "select * from tb_Student where Sdept='" + txtSelect.Text.Trim() + "'";
}
else if (cmbSelect.SelectedIndex == 6)
{
sqlStr = "select * from tb_student";
}
DataSet ds = new DataSet();
ds = CDataBase.GetDataFromDB(sqlStr);
if (ds != null)
{
dgrdvStudent.DataSource = ds.Tables[0];
dgrdvStudent.Columns[0].HeaderText = "学生学号";
dgrdvStudent.Columns[0].Width = 168;
dgrdvStudent.Columns[1].HeaderText = "学生姓名";
dgrdvStudent.Columns[1].Width = 159;
dgrdvStudent.Columns[2].HeaderText = "学生性别";
dgrdvStudent.Columns[2].Width = 88;
dgrdvStudent.Columns[3].HeaderText = "学生年龄";
dgrdvStudent.Columns[3].Width = 88;
dgrdvStudent.Columns[4].HeaderText = "学生班级";
dgrdvStudent.Columns[4].Width = 100;
dgrdvStudent.Columns[5].HeaderText = "所在学院（系别）";
dgrdvStudent.Columns[5].Width = 159;
dgrdvStudent_RowHeaderMouseClick(null, null);
}
else
{
dgrdvStudent.DataSource = null;
ClearAll();
MessageBox.Show("没有该条记录,请重新查询。", "提示");
RefreshData();
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
}
}
//添加
private void btnAdd_Click(object sender, EventArgs e)
{
try
{
if (btnAdd.Text == "添加")
{
btnCancel.Visible = true;
btnAdd.Text = "确定";
ClearAll(); //这句无法工作
cmbSex.SelectedIndex = -1;
ObjOpen();
RefreshData();
btnUpdate.Enabled = false;
btnDelete.Enabled = false;
btnSelect.Enabled = false;
cmbSelect.Enabled = false;
txtSelect.Enabled = false;
dgrdvStudent.Enabled = false;
return;
}
else if (txtNo.Text.Trim() == "")
{
MessageBox.Show("学号不能为空!", "提示");
txtNo.Focus();
return;
}
else if (txtName.Text.Trim() == "")
{
MessageBox.Show("姓名不能为空!", "提示");
txtName.Focus();
return;
}
else if (txtClass.Text.Trim() == "")
{
MessageBox.Show("班级不能为空!", "提示");
txtClass.Focus();
return;
}
else if (cmbSex.SelectedIndex == -1)
{
MessageBox.Show("请选择性别", "提示");
cmbSex.Focus();
return;
}
else if (txtDept.Text == "")
{
MessageBox.Show("所属学院(系别)不能为空!", "提示");
txtDept.Focus();
return;
}
else if (txtAge.Text.Trim() == "")
{
MessageBox.Show("年龄不能为空!", "提示");
txtAge.Focus();
return;
}
else if (!No(txtNo.Text.Trim()))
{
MessageBox.Show("该学号已存在,请重新输入!", "提示");
txtNo.Focus();
return;
}
btnAdd.Text = "添加";
btnCancel.Visible = false;
btnCancel2.Visible = false;
string sqlStr;
sqlStr = "insert into tb_Student values('" + txtNo.Text.Trim() + "','" + txtName.Text.Trim() + "','" + cmbSex.Text.Trim() + "','" + txtAge.Text.Trim() + "','" + txtClass.Text.Trim() + "','" + txtDept.Text.Trim() + "')";
CDataBase.UpdateDB(sqlStr);
RefreshData();
if (MessageBox.Show("添加成功,继续添加吗?", "添加学生信息", MessageBoxButtons.YesNo, MessageBoxIcon.Question,
MessageBoxDefaultButton.Button1) == DialogResult.Yes)
{
btnCancel.Visible = true;
ClearAll();
ObjOpen();
btnAdd.Text = "确定";
}
else
{
Objclose();
btnUpdate.Enabled = true;
btnDelete.Enabled = true;
btnSelect.Enabled = true;
cmbSelect.Enabled = true;
txtSelect.Enabled = true;
dgrdvStudent.Enabled = true;
}
}
catch (Exception ex)
{
CDataBase.conn.Close();
MessageBox.Show(ex.Message);
ClearAll();
Objclose();
btnUpdate.Enabled = true;
btnDelete.Enabled = true;
btnSelect.Enabled = true;
cmbSelect.Enabled = true;
txtSelect.Enabled = true;
dgrdvStudent.Enabled = true;
dgrdvStudent_RowHeaderMouseClick(null, null);
}
}