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学生成绩查询代码
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2013-11-06
21:23:55
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C#学生成绩查询代码,只有一部分,万分谅解
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private void 成绩查询_Load(object sender, EventArgs e)
{
sqlconnection1 = new SqlConnection(conn);
str = "select course.course_name,student_course.student_id,student_course.score,student_course.credit,student_course.sc_semester,student_course.school_year from student_course inner join course on student_course.course_id=course.course_id";
sqldataadapter1 = new SqlDataAdapter(str, sqlconnection1);
dataset1 = new DataSet();
dataset1.Clear();
sqldataadapter1.Fill(dataset1, "course");
dataGridView1.DataSource = dataset1.Tables[0];
}
private void btnquerybyname_Click(object sender, EventArgs e)
{
sqlconnection1 = new SqlConnection(conn);
str = str = "select course.course_name,student_course.student_id,student_course.score,student_course.credit,student_course.sc_semester,student_course.school_year from student_course inner join course on student_course.course_id=course.course_id";
str = str + " and course.course_name like '%" + txtstuname.Text.Trim() + "%' ";
sqldataadapter1 = new SqlDataAdapter(str, sqlconnection1);
dataset1 = new DataSet();
dataset1.Clear();
sqldataadapter1.Fill(dataset1, "course");
dataGridView1.DataSource = dataset1.Tables[0];
}
private void bndelected_Click(object sender, EventArgs e)
{
if (MessageBox.Show("您确认要删除该记录吗?", "确认", MessageBoxButtons.YesNoCancel) == DialogResult.Yes)
{
string stu_id = this.dataGridView1.CurrentRow.Cells[1].Value.ToString();//获取选中行的学生ID号
str = "delete from student_course where student_id=" + stu_id + " ";
{
sqlconnection1 = new SqlConnection(conn);
str = "select course.course_name,student_course.student_id,student_course.score,student_course.credit,student_course.sc_semester,student_course.school_year from student_course inner join course on student_course.course_id=course.course_id";
sqldataadapter1 = new SqlDataAdapter(str, sqlconnection1);
dataset1 = new DataSet();
dataset1.Clear();
sqldataadapter1.Fill(dataset1, "course");
dataGridView1.DataSource = dataset1.Tables[0];
}
private void btnquerybyname_Click(object sender, EventArgs e)
{
sqlconnection1 = new SqlConnection(conn);
str = str = "select course.course_name,student_course.student_id,student_course.score,student_course.credit,student_course.sc_semester,student_course.school_year from student_course inner join course on student_course.course_id=course.course_id";
str = str + " and course.course_name like '%" + txtstuname.Text.Trim() + "%' ";
sqldataadapter1 = new SqlDataAdapter(str, sqlconnection1);
dataset1 = new DataSet();
dataset1.Clear();
sqldataadapter1.Fill(dataset1, "course");
dataGridView1.DataSource = dataset1.Tables[0];
}
private void bndelected_Click(object sender, EventArgs e)
{
if (MessageBox.Show("您确认要删除该记录吗?", "确认", MessageBoxButtons.YesNoCancel) == DialogResult.Yes)
{
string stu_id = this.dataGridView1.CurrentRow.Cells[1].Value.ToString();//获取选中行的学生ID号
str = "delete from student_course where student_id=" + stu_id + " ";
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