经历几天的探索，对原有的系统做了重大的修改。
修改如下：
1、登录界面进行了修改，增加了管理员选项。
2、学生界面增加了课表查询，成绩查询和选课系统，学生信息功能，界面做了优化，可以显示用户头像（头像设置是将图片转成二进制文件储存在数据库中）。
3、教师页面添加发布成绩，查看课表功能。
4、增加了管理员页面，显示学生的信息。可以实现学生和教师的添加，删除，修改，查询功能，另外，可以更改学生老师的头像（其实学生老师自己本身也能改，但因为博主自个太赖，没有添加那些代码，大家可以自行添加）
5、数据库目录及窗体目录
、
6、一些功能图片
总结：
本系统基本实现了学生管理系统的功能，但还是存在许多bug,以后还会修改与完善。本系统的完成也算对c#一段时间学习的总结，也让我对.net有了一定了了解，不得不说用VS编程真的很方便。VS大法好呀。。。由于代码过多，就不再这一一分享了。本项目已经上传到GitHub，网址：https://github.com/chp0304/Student-Management-System
大家可以到git上去浏览源码，大家一起改进本系统。实在不行，在评论区留下邮箱，我发给大家，评论必回。
**
最后，撰文不易，还请大家给个赞！！！
**
分享部分代码--------
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.IO;
namespace 强智系统
{
public partial class Administrator : Form
{
static string ss = "Server = localhost; database = 学生信息管理系统;Integrated Security = True";//integrated 各部分密切协调的；综合的；完整统一的
SqlConnection con = new SqlConnection(ss);//连接数据库
SqlCommand cmd;
SqlDataAdapter adp,adp1;
DataSet dat;
DataTable dt,dt1,dt2,dt3;
SqlDataReader dr;
TreeNode Main;//主节点
TreeNode stu;//学生节点
TreeNode tea;//教师节点
public Administrator()
{
InitializeComponent();
//this.WindowState = FormWindowState.Maximized;
//控件随窗体全屏显示
int count = this.Controls.Count * 2 + 2;
float[] factor = new float[count];
int i = 0;
factor[i++] = Size.Width;
factor[i++] = Size.Height;
foreach (Control ctrl in this.Controls)
{
factor[i++] = ctrl.Location.X / (float)Size.Width;
factor[i++] = ctrl.Location.Y / (float)Size.Height;
ctrl.Tag = ctrl.Size;//!!!
}
Tag = factor;
}
private void tabPage2_Click(object sender, EventArgs e)
{
}
private void label15_Click(object sender, EventArgs e)
{
}
private void textBox16_TextChanged(object sender, EventArgs e)
{
}
private void button2_Click(object sender, EventArgs e)//学生更新
{
string sno = textBox1.Text.Trim();
string name = textBox2.Text.Trim();
string sex = textBox3.Text.Trim();
string sage = textBox4.Text.Trim();
string special = textBox5.Text.Trim();
string college = textBox6.Text.Trim();
string year = textBox7.Text.Trim();
string cla = textBox9.Text.Trim();
string phone = textBox8.Text.Trim();
con.Close();
con.Open();
if (textBox2.Text.Trim() == "")
{
errorProvider1.SetError(textBox2, "姓名不能为空！");
return;
}
else if (textBox1.Text.Trim() == "")
{
errorProvider1.SetError(textBox1, "学号不能为空！");
return;
}
if (treeView1.SelectedNode.Text == "学生" || treeView1.SelectedNode.Parent.Text == "学生")
{
//sqlcommand.ExecuteNonQuery() 执行select之后，总是返回-1的
//sqlcommand.ExecuteNonQuery()返回的是受影响的行数，只对update，delete，insert 有效
string s = "select * from S where 学号 =" + textBox1.Text.Trim();
cmd = new SqlCommand(s, con);
if (cmd.ExecuteScalar() == null)
{
errorProvider1.SetError(textBox1, "此学号不存在，不能更新只能添加，请重新输入！");
return;
}
else
{
string pOldName = dataGridView2.Rows[0].Cells["姓名"].Value.ToString().Trim();
con.Close();
con.Open();
s = String.Format("update S set 学号 = '{0}',姓名 = '{1}',性别 = '{2}',班级 = '{3}',年龄 = '{4}',专业 = '{5}',学院 = '{6}',年级 = '{7}',电话 = '{8}' where 学号 = '{9}'", sno, name, sex, cla, sage, special, college, year, phone, sno);
cmd = new SqlCommand(s,con);
int cnt = cmd.ExecuteNonQuery();
if (cmd.ExecuteNonQuery() > 0)
{
//实时更新
for (int i = 0; i < stu.Nodes.Count; i++)
{
if (stu.Nodes[i].Text.Trim() == pOldName)
{
stu.Nodes[i].Text = textBox2.Text;
break;
}
}
con.Close();
con.Open();
string sql = "select 学号,姓名,性别,班级,年龄,专业,学院,年级,电话 from S where 学号 = " + "'" + sno + "'";
adp = new SqlDataAdapter(sql,con);
dt2 = new DataTable();
adp.Fill(dt2);
dataGridView2.DataSource = dt2;
con.Close();
MessageBox.Show("更新成功！");
}
else
{
MessageBox.Show("更新失败！");
}
}
}
con.Close();
}
private void button3_Click(object sender, EventArgs e)//学生删除
{
con.Close();
con.Open();
MessageBox.Show("确认删除？");
if (treeView1.SelectedNode.Text == "学生" || treeView1.SelectedNode.Parent.Text == "学生")
{
if (dataGridView2.SelectedRows.Count <= 0)
{
MessageBox.Show("请先选中一行信息！");
return;
}
else
{
if (MessageBox.Show("确定删除选中行的信息吗?") == System.Windows.Forms.DialogResult.OK)
{
//TreeNode stu_1 = new TreeNode(dataGridView2.SelectedRows[0].Cells[0].Value.ToString());
string s = "delete from S where 学号 = " + "'" + dataGridView2.SelectedRows[0].Cells[0].Value.ToString () + "'";
cmd = new SqlCommand(s,con);
if(cmd.ExecuteNonQuery() > 0)
{
for (int i = 0; i < stu.Nodes.Count; i++)
{
if (stu.Nodes[i].Text.Trim() == dataGridView2.SelectedRows[0].Cells[1].Value.ToString().Trim())
{
stu.Nodes.Remove(stu.Nodes[i]);
break;
}
}
MessageBox.Show("删除成功!");
}
else
{
MessageBox.Show("删除失败！");
}
}
}
}
}
private void button5_Click(object sender, EventArgs e)//学生查找
{
con.Close();
con.Open();
string sno = textBox1.Text.Trim();
string name = textBox2.Text.Trim();
string sex = textBox3.Text.Trim();
string sage = textBox4.Text.Trim();
string special = textBox5.Text.Trim();
string college = textBox6.Text.Trim();
string year = textBox7.Text.Trim();
string cla = textBox9.Text.Trim();
string phone = textBox8.Text.Trim();
//if (treeView1.SelectedNode.Text == "学生" || treeView1.SelectedNode.Parent.Text == "学生")
//{
string s = "select * from S where ";
if (textBox2.Text != "") s = s + " 姓名 like '%" + name + "%' and ";
if (textBox1.Text != "") s = s + " 学号 like '%" + sno + "%' and ";
if (textBox9.Text != "") s = s + " 班级 like '%" + cla + "%' and";
if (textBox3.Text != "") s = s + " 性别 like '%" + sex + "%' and ";
if (textBox5.Text != "") s = s + " 专业 like '%" + special + "%' and ";
if (textBox6.Text != "") s = s + " 学院 like '%" + college + "%' and ";
if (textBox7.Text != "") s = s + " 年级 like '%" + year + "%' and ";
if (textBox8.Text != "") s = s + " 电话 like '%" + phone + "%' and ";
if (textBox4.Text != "") s = s + " 年龄 like '%" + sage + "%' and ";
s = s.Substring(0, s.Length - 4).Trim();
adp = new SqlDataAdapter(s,con);
dt3 = new DataTable();
adp.Fill(dt3);
dataGridView2.DataSource = dt3;
//}
con.Close();
}
private void dataGridView2_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
}
private void dataGridView2_RowHeaderCellChanged(object sender, DataGridViewRowEventArgs e)
{
}
private void dataGridView2_RowHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)//datagridview2点击事件
{
if (e.RowIndex >= 0)
{
tabControl1.SelectedIndex = 0;
textBox1.Text = dataGridView2.Rows[e.RowIndex].Cells["学号"].Value.ToString();
textBox2.Text = dataGridView2.Rows[e.RowIndex].Cells["姓名"].Value.ToString();
textBox3.Text = dataGridView2.Rows[e.RowIndex].Cells["性别"].Value.ToString();
textBox4.Text = dataGridView2.Rows[e.RowIndex].Cells["年龄"].Value.ToString();
textBox5.Text = dataGridView2.Rows[e.RowIndex].Cells["专业"].Value.ToString();
textBox6.Text = dataGridView2.Rows[e.RowIndex].Cells["学院"].Value.ToString();
textBox7.Text = dataGridView2.Rows[e.RowIndex].Cells["年级"].Value.ToString();
textBox8.Text = dataGridView2.Rows[e.RowIndex].Cells["电话"].Value.ToString();
textBox9.Text = dataGridView2.Rows[e.RowIndex].Cells["班级"].Value.ToString();
byte[] btImage = (byte[])dataGridView2.Rows[e.RowIndex].Cells["image"].Value;
System.IO.MemoryStream ms = new System.IO.MemoryStream(btImage);
System.Drawing.Image image = System.Drawing.Image.FromStream(ms);//将二进制转换为流
pictureBox2.Image = image;
}
}
private void button7_Click(object sender, EventArgs e)
{
this.Close();
}
private void button8_Click(object sender, EventArgs e)//教师删除
{
con.Close();
con.Open();
MessageBox.Show("确认删除？");
if (treeView1.SelectedNode.Text == "老师" || treeView1.SelectedNode.Parent.Text == "老师")
{
if (dataGridView1.SelectedRows.Count <= 0)
{
MessageBox.Show("请先选中一行信息！");
return;
}
else
{
if (MessageBox.Show("确定删除选中行的信息吗?") == System.Windows.Forms.DialogResult.OK)
{
//TreeNode stu_1 = new TreeNode(dataGridView2.SelectedRows[0].Cells[0].Value.ToString());
string s = "delete from Teacher where tno = " + "'" + dataGridView1.SelectedRows[0].Cells[0].Value.ToString() + "'";
cmd = new SqlCommand(s, con);
if (cmd.ExecuteNonQuery() > 0)
{
for (int i = 0; i < tea.Nodes.Count; i++)
{
if (tea.Nodes[i].Text.Trim() == dataGridView1.SelectedRows[0].Cells[1].Value.ToString().Trim())
{
tea.Nodes.Remove(tea.Nodes[i]);
break;
}
}
MessageBox.Show("删除成功!");
}
else
{
MessageBox.Show("删除失败！");
}
}
}
}
}
private void button10_Click(object sender, EventArgs e)//教师添加
{
pictureBox2.Load(Application.StartupPath + "\\默认头像.jpg");//默认头像
//textBox10.Text = "";
//textBox11.Text = "";
//textBox12.Text = "";
//textBox13.Text = "";
//textBox14.Text = "";
//textBox15.Text = "";
//textBox16.Text = "";
string tno = textBox10.Text.Trim();
string tname = textBox11.Text.Trim();
string tsex = textBox12.Text.Trim();
string tage = textBox13.Text.Trim();
string tcollege = textBox14.Text.Trim();
string tclass = textBox15.Text.Trim();
string tphone = textBox16.Text.Trim();
con.Close();
con.Open();
if (textBox11.Text.Trim() == "")
{
errorProvider1.SetError(textBox2, "姓名不能为空！");
return;
}
else if (textBox10.Text.Trim() == "")
{
errorProvider1.SetError(textBox1, "教工号不能为空！");
return;
}
if (treeView1.SelectedNode.Text == "老师" || treeView1.SelectedNode.Parent.Text == "老师")
{
//sqlcommand.ExecuteNonQuery() 执行select之后，总是返回-1的
//sqlcommand.ExecuteNonQuery()返回的是受影响的行数，只对update，delete，insert 有效
string s = "select * from Teacher where tno =" + textBox10.Text.Trim();
cmd = new SqlCommand(s, con);
if (cmd.ExecuteScalar() != null)
{
errorProvider1.SetError(textBox10, "此学号已经存在，不能重复，请重新输入！");
return;
}
else
{
con.Close();
con.Open();
s = String.Format("insert into Teacher values( '{0}','{1}','{2}','{3}','{4}','{5}','{6}','{7}')", tno, tname, tsex, tage, tcollege, tclass,tphone, " ");
cmd = new SqlCommand(s, con);
if (cmd.ExecuteNonQuery() > 0)
{
Image picture = pictureBox1.Image;
MemoryStream ms = new MemoryStream();
picture.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);//转换成数据流
byte[] bPicture = ms.GetBuffer();
string ss = "Server = localhost;database = 学生信息管理系统;Integrated Security = True";
SqlConnection con = new SqlConnection(ss);
//string sql = "insert into Teacher(image) values(@image)";
string sql = "update Teacher set image = @image where tno = " + textBox10.Text.Trim();
SqlCommand cmd = new SqlCommand(sql, con);
cmd.Parameters.Add("@image", SqlDbType.Image);
cmd.Parameters["@image"].Value = bPicture;
try
{
con.Open();
cmd.ExecuteNonQuery();
//MessageBox.Show("修改成功!");
}
catch (Exception ee)
{
MessageBox.Show(ee.Message);
}
finally
{
con.Close();
}
TreeNode tea_1 = new TreeNode(tname);
tea.Nodes.Add(tea_1);
MessageBox.Show("添加成功！");
}
else
{
MessageBox.Show("添加失败！");
}
}
}
con.Close();
}
private void button9_Click(object sender, EventArgs e)//更新事件
{
string tno = textBox10.Text.Trim();
string tname = textBox11.Text.Trim();
string tsex = textBox12.Text.Trim();
string tage = textBox13.Text.Trim();
string tcollege = textBox14.Text.Trim();
string tclass = textBox15.Text.Trim();
string tphone = textBox16.Text.Trim();
con.Close();
con.Open();
if (textBox11.Text.Trim() == "")
{
errorProvider1.SetError(textBox2, "姓名不能为空！");
return;
}
else if (textBox10.Text.Trim() == "")
{
errorProvider1.SetError(textBox1, "学号不能为空！");
return;
}
if (treeView1.SelectedNode.Text == "老师" || treeView1.SelectedNode.Parent.Text == "老师")
{
//sqlcommand.ExecuteNonQuery() 执行select之后，总是返回-1的
//sqlcommand.ExecuteNonQuery()返回的是受影响的行数，只对update，delete，insert 有效
string s = "select * from Teacher where tno =" + textBox10.Text.Trim();
cmd = new SqlCommand(s, con);
if (cmd.ExecuteScalar() == null)
{
errorProvider1.SetError(textBox10, "此学号不存在，不能更新只能添加，请重新输入！");
return;
}
else
{
string oldname = dataGridView1.Rows[0].Cells["tname"].Value.ToString().Trim();
con.Close();
con.Open();
s = String.Format("update Teacher set tno = '{0}',tname = '{1}',tsex = '{2}',tage = '{3}',tcollege = '{4}',tclass = '{5}',tphone = '{6}' where tno = '{7}'", tno, tname, tsex, tage, tcollege, tclass, tphone, tno);
cmd = new SqlCommand(s, con);
int cnt = cmd.ExecuteNonQuery();
if (cmd.ExecuteNonQuery() > 0)
{
//实时更新
for(int i = 0;i<tea.Nodes.Count;i++)
{
if(tea.Nodes[i].Text.Trim() == oldname)
{
tea.Nodes[i].Text = textBox11.Text;
break;
}
}
con.Close();
con.Open();
string sql = "select tno,tname,tsex,tage,tcollege,tclass,tphone,tno from Teacher where tno = " + "'" + tno + "'";
adp = new SqlDataAdapter(sql, con);
dt2 = new DataTable();
adp.Fill(dt2);
dataGridView1.DataSource = dt2;
con.Close();
MessageBox.Show("更新成功！");
}
else
{
MessageBox.Show("更新失败！");
}
}
}
con.Close();
}
private void button6_Click(object sender, EventArgs e)//学生查询
{
con.Close();
con.Open();
string tno = textBox10.Text.Trim();
string tname = textBox11.Text.Trim();
string tsex = textBox12.Text.Trim();
string tage = textBox13.Text.Trim();
string tcollege = textBox14.Text.Trim();
string tclass = textBox15.Text.Trim();
string tphone = textBox16.Text.Trim();
//if (treeView1.SelectedNode.Text == "老师" || treeView1.SelectedNode.Parent.Text == "老师")
//{
//模糊查找
string s = "select * from Teacher where ";
if (textBox10.Text != "") s = s + " tno like '%" + tno + "%' and ";
if (textBox11.Text != "") s = s + " tname like '%" + tname + "%' and ";
if (textBox12.Text != "") s = s + " tsex like '%" + tsex + "%' and";
if (textBox13.Text != "") s = s + " tage like '%" + tage + "%' and ";
if (textBox14.Text != "") s = s + " tcollege like '%" + tcollege + "%' and ";
if (textBox15.Text != "") s = s + " tclass like '%" + tclass + "%' and ";
if (textBox16.Text != "") s = s + " tphone like '%" + tphone + "%' and ";
s = s.Substring(0, s.Length - 4).Trim();
adp = new SqlDataAdapter(s, con);
dt3 = new DataTable();
adp.Fill(dt3);
dataGridView1.DataSource = dt3;
//}
con.Close();
}
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
}
private void dataGridView1_RowHeaderMouseClick(object sender, DataGridViewCellMouseEventArgs e)//datagridview1点击事件
{
//string tno = textBox10.Text.Trim();
//string tname = textBox11.Text.Trim();
//string tsex = textBox12.Text.Trim();
//string tage = textBox13.Text.Trim();
//string tcollege = textBox14.Text.Trim();
//string tclass = textBox15.Text.Trim();
//string tphone = textBox16.Text.Trim();
if (e.RowIndex >= 0)
{
tabControl1.SelectedIndex = 1;
textBox10.Text = dataGridView1.Rows[e.RowIndex].Cells["tno"].Value.ToString();
textBox11.Text = dataGridView1.Rows[e.RowIndex].Cells["tname"].Value.ToString();
textBox12.Text = dataGridView1.Rows[e.RowIndex].Cells["tsex"].Value.ToString();
textBox13.Text = dataGridView1.Rows[e.RowIndex].Cells["tage"].Value.ToString();
textBox14.Text = dataGridView1.Rows[e.RowIndex].Cells["tcollege"].Value.ToString();
textBox15.Text = dataGridView1.Rows[e.RowIndex].Cells["tclass"].Value.ToString();
textBox16.Text = dataGridView1.Rows[e.RowIndex].Cells["tphone"].Value.ToString();
byte[] btImage = (byte[])dataGridView1.Rows[e.RowIndex].Cells["image"].Value;
System.IO.MemoryStream ms = new System.IO.MemoryStream(btImage);
System.Drawing.Image image = System.Drawing.Image.FromStream(ms);//将二进制转换为流
pictureBox1.Image = image;
}
}
private void button11_Click(object sender, EventArgs e) //学生修改头像
{
if(treeView1.SelectedNode.Text == "学生" || treeView1.SelectedNode.Parent.Text == "学生")
{
OpenFileDialog open = new OpenFileDialog(); // 打开文件，选择头像
open.ShowDialog();
string path = open.FileName;
pictureBox2.Load(path);//显示所选头像
//储存二进制头像到数据库
Image picture = pictureBox2.Image;
MemoryStream ms = new MemoryStream();
picture.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);//转换成数据流
byte[] bPicture = ms.GetBuffer();//注意这一条与下两条语句的区别
string ss = "Server = localhost;database = 学生信息管理系统;Integrated Security = True";
SqlConnection con = new SqlConnection(ss);
//string sql = "insert into Teacher(image) values(@image)";
string sql = "update S set image = @image where 学号 = " + textBox1.Text.Trim();
SqlCommand cmd = new SqlCommand(sql, con);
cmd.Parameters.Add("@image", SqlDbType.Image);
cmd.Parameters["@image"].Value = bPicture;
try
{
con.Open();
cmd.ExecuteNonQuery();
MessageBox.Show("修改成功!");
}
catch (Exception ee)
{
MessageBox.Show(ee.Message);
}
finally
{
con.Close();
}
}
}
private void button12_Click(object sender, EventArgs e) //老师修改头像
{
if (treeView1.SelectedNode.Text == "老师" || treeView1.SelectedNode.Parent.Text == "老师")
{
OpenFileDialog open = new OpenFileDialog(); // 打开文件，选择头像
open.ShowDialog();
string path = open.FileName;
pictureBox1.Load(path);//显示所选头像
//储存二进制头像到数据库
Image picture = pictureBox1.Image;
MemoryStream ms = new MemoryStream();
picture.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);//转换成数据流
byte[] bPicture = ms.GetBuffer();//注意这一条与下两条语句的区别
string ss = "Server = localhost;database = 学生信息管理系统;Integrated Security = True";
SqlConnection con = new SqlConnection(ss);
//string sql = "insert into Teacher(image) values(@image)";
string sql = "update Teacher set image = @image where tno = " + textBox10.Text.Trim();
SqlCommand cmd = new SqlCommand(sql, con);
cmd.Parameters.Add("@image", SqlDbType.Image);
cmd.Parameters["@image"].Value = bPicture;
try
{
con.Open();
cmd.ExecuteNonQuery();
MessageBox.Show("修改成功!");
}
catch (Exception ee)
{
MessageBox.Show(ee.Message);
}
finally
{
con.Close();
}
}
}
private void Administrator_Resize(object sender, EventArgs e)
{
if (Tag != null)
{
float[] scale = (float[])Tag;
int i = 2;
foreach (Control ctrl in this.Controls)
{
ctrl.Left = (int)(Size.Width * scale[i++]);
ctrl.Top = (int)(Size.Height * scale[i++]);
ctrl.Width = (int)(Size.Width / (float)scale[0] * ((Size)ctrl.Tag).Width);
ctrl.Height = (int)(Size.Height / (float)scale[1] * ((Size)ctrl.Tag).Height);
}
}
}
private void button4_Click(object sender, EventArgs e)//退出
{
this.Close();
}
private void button1_Click(object sender, EventArgs e) //添加学生信息
{
pictureBox2.Load(Application.StartupPath + "\\默认头像.jpg");//默认头像
//文本框置空
//textBox1.Text = "";
//textBox2.Text = "";
//textBox3.Text = "";
//textBox4.Text = "";
//textBox5.Text = "";
//textBox6.Text = "";
//textBox7.Text = "";
//textBox8.Text = "";
//textBox9.Text = "";
string sno = textBox1.Text.Trim();
string name = textBox2.Text.Trim();
string sex = textBox3.Text.Trim();
string sage = textBox4.Text.Trim();
string special = textBox5.Text.Trim();//专业
string college = textBox6.Text.Trim();//学院
string year = textBox7.Text.Trim();//年级
string cla = textBox9.Text.Trim();
string phone = textBox8.Text.Trim();
con.Close();
con.Open();
if (textBox2.Text.Trim() == "")
{
errorProvider1.SetError(textBox2, "姓名不能为空！");
return;
}
else if (textBox1.Text.Trim() == "")
{
errorProvider1.SetError(textBox1, "学号不能为空！");
return;
}
if(treeView1.SelectedNode.Text == "学生" || treeView1.SelectedNode.Parent.Text == "学生")
{
//sqlcommand.ExecuteNonQuery() 执行select之后，总是返回-1的
//sqlcommand.ExecuteNonQuery()返回的是受影响的行数，只对update，delete，insert 有效
string s = "select * from S where 学号 =" + textBox1.Text.Trim();
cmd = new SqlCommand(s,con);
if(cmd.ExecuteScalar() != null )
{
errorProvider1.SetError(textBox1, "此学号已经存在，不能重复，请重新输入！");
return;
}
else
{
con.Close();
con.Open();
s = String.Format("insert into S values( '{0}','{1}','{2}','{3}','{4}','{5}','{6}','{7}','{8}','{9}')",sno,name,sex,cla,sage,special,college,year,phone, "");
cmd = new SqlCommand(s,con);
if(cmd.ExecuteNonQuery()>0)
{
//默认头像
Image picture = pictureBox2.Image;
MemoryStream ms = new MemoryStream();
picture.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);//转换成数据流
byte[] bPicture = ms.GetBuffer();
string ss = "Server = localhost;database = 学生信息管理系统;Integrated Security = True";
SqlConnection con = new SqlConnection(ss);
//string sql = "insert into Teacher(image) values(@image)";
string sql = "update S set image = @image where 学号 = " + textBox1.Text.Trim();
SqlCommand cmd = new SqlCommand(sql, con);
cmd.Parameters.Add("@image", SqlDbType.Image);
cmd.Parameters["@image"].Value = bPicture;
try
{
con.Open();
cmd.ExecuteNonQuery();
//MessageBox.Show("修改成功!");
}
catch (Exception ee)
{
MessageBox.Show(ee.Message);
}
finally
{
con.Close();
}
TreeNode stu_1 = new TreeNode(name);
stu.Nodes.Add(stu_1);
MessageBox.Show("添加成功！");
}
else
{
MessageBox.Show("添加失败！");
}
}
}
con.Close();
}
private void Administrator_Load(object sender, EventArgs e)//添加节点
{
Main = new TreeNode("学生信息管理系统");//主节点
Main = treeView1.Nodes[0];
stu = new TreeNode("学生");//学生节点
tea = new TreeNode("老师");//教师节点
Main.Nodes.Add(stu);
Main.Nodes.Add(tea);
con.Open();
string s_stu = "select * from S ";
dat = new DataSet();
//dat.Tables[0] = new DataTable();
adp = new SqlDataAdapter(s_stu, con);
adp.Fill(dat);
for(int i=0;i<dat.Tables[0].Rows.Count;i++) //添加学生
{
TreeNode stu_1 = new TreeNode(dat.Tables[0].Rows[i]["姓名"].ToString());
stu.Nodes.Add(stu_1);
}
con.Close();
con.Open();
string s_tea = "select * from Teacher";
adp = new SqlDataAdapter(s_tea,con);
dt = new DataTable();
adp.Fill(dt);
for(int j=0;j<dt.Rows.Count;j++) // 添加教师
{
TreeNode tea_1 = new TreeNode(dt.Rows[j]["tname"].ToString());
tea.Nodes.Add(tea_1);
}
con.Close();
}
private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)//tree选择事件
{
con.Close();
con.Open();
dt1 = new DataTable();
if(e.Node.Parent != null && e.Node.Parent.Text == "学生")
{
tabControl1.SelectedIndex = 0;
string s = "select 学号,姓名,性别,班级,年龄,专业,学院,年级,电话,image from S where 姓名 =" + "'" + e.Node.Text.ToString().Trim() + "'";
adp1 = new SqlDataAdapter(s,con);
adp1.Fill(dt1);
dataGridView2.DataSource = dt1;
textBox1.Text = dt1.Rows[0]["学号"].ToString();
textBox2.Text = dt1.Rows[0]["姓名"].ToString();
textBox3.Text = dt1.Rows[0]["性别"].ToString();
textBox4.Text = dt1.Rows[0]["年龄"].ToString();
textBox5.Text = dt1.Rows[0]["专业"].ToString();
textBox6.Text = dt1.Rows[0]["学院"].ToString();
textBox7.Text = dt1.Rows[0]["年级"].ToString();
textBox8.Text = dt1.Rows[0]["电话"].ToString();
textBox9.Text = dt1.Rows[0]["班级"].ToString();
//显示头像
byte[] btImage = (byte[])dt1.Rows[0]["image"];
System.IO.MemoryStream ms = new System.IO.MemoryStream(btImage);
System.Drawing.Image image = System.Drawing.Image.FromStream(ms);//将二进制转换为流
pictureBox2.Image = image;
dataGridView2.Columns["image"].Visible = false;//不在daagridview中显示图片
}
else if(e.Node.Parent != null && e.Node.Parent.Text == "老师")
{
tabControl1.SelectedIndex = 1;
string s = "select tno,tname,tsex,tage,tcollege,tclass,tphone,image from teacher where tname = " + "'" + e.Node.Text.ToString().Trim() + "'";
adp1 = new SqlDataAdapter(s, con);
adp1.Fill(dt1);
dataGridView1.DataSource = dt1;
textBox10.Text = dt1.Rows[0]["tno"].ToString();
textBox11.Text = dt1.Rows[0]["tname"].ToString();
textBox12.Text = dt1.Rows[0]["tsex"].ToString();
textBox13.Text = dt1.Rows[0]["tage"].ToString();
textBox14.Text = dt1.Rows[0]["tcollege"].ToString();
textBox15.Text = dt1.Rows[0]["tclass"].ToString();
textBox16.Text = dt1.Rows[0]["tphone"].ToString();
//textBox8.Text = dt1.Rows[0]["电话"].ToString();
byte[] btImage = (byte[])dt1.Rows[0]["image"];
System.IO.MemoryStream ms = new System.IO.MemoryStream(btImage);
System.Drawing.Image image = System.Drawing.Image.FromStream(ms);//将二进制转换为流
pictureBox1.Image = image;
dataGridView1.Columns["image"].Visible = false;//不在daagridview中显示图片
}
}
}
}
