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C#實現(xiàn)簡單學(xué)生信息管理系統(tǒng)

 更新時間:2022年02月27日 08:11:41   作者:_shuai_  
這篇文章主要為大家詳細(xì)介紹了C#實現(xiàn)簡單學(xué)生信息管理系統(tǒng),具有一定的參考價值,感興趣的小伙伴們可以參考一下

 本文實例為大家分享了C#實現(xiàn)簡單學(xué)生信息管理系統(tǒng)的具體代碼,供大家參考,具體內(nèi)容如下

一、運行環(huán)境windows,使用vs編譯軟件

二、主要功能

登錄、添加學(xué)生信息、修改學(xué)生信息、刪除學(xué)生信息、查詢學(xué)生信息

三、實現(xiàn)步驟

1、登陸界面功能實現(xiàn)

老規(guī)矩,先貼下主要代碼:

 //構(gòu)造方法
 public Login()
 {
 InitializeComponent();
 this.label3.Parent = this;
 this.label1.BackColor = Color.Transparent;
 this.label2.BackColor = Color.Transparent;
 this.label3.BackColor = Color.Transparent;
 this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
 }
 //對登錄按鈕的事件實現(xiàn)代碼
 private void button1_Click(object sender, EventArgs e)
 {
 string ss = ConfigurationManager.ConnectionStrings["Stu"].ToString();
 SqlConnection conn = new SqlConnection(ss);
 try
 {
 //開啟連接 
 conn.Open(); 
 // MessageBox.Show("數(shù)據(jù)庫連接成功!"); 
 }
 catch (Exception)
 {
 //MessageBox.Show("數(shù)據(jù)庫連接失敗!");
 } 
 String uname = txtName.Text.Trim();
 string pword = txtPass.Text.Trim();
 if(uname == ""|| pword == "")
 {
 MessageBox.Show("請輸入用戶名或密碼!");
 return;
 }
 else
 {
 SqlCommand cmd = conn.CreateCommand();
 SqlDataAdapter adp = new SqlDataAdapter();
 string sql2 = "select * from account where name='"+ uname + " 'and pass='" + pword + " ' ";
 cmd.CommandText = sql2;
 adp.SelectCommand = cmd;
 DataSet dat = new DataSet();
 adp.Fill(dat, "account");
 if(dat.Tables["account"].Rows.Count == 0)
 {
 MessageBox.Show("用戶名或密碼錯誤!");
 return;
 }
 else
 {
 Form1.isLogin = true;
 Form1.username = this.txtName.Text;
 this.Close();
 }
 cmd.Clone();
 }
 conn.Close();
 
 }
 //實現(xiàn)按ESC鍵關(guān)閉該窗口
 protected override bool ProcessCmdKey(ref System.Windows.Forms.Message msg, System.Windows.Forms.Keys keyData)
 {
 switch (keyData)
 {
 case Keys.Escape:
 this.Close();//esc關(guān)閉窗體
 break;
 }
 return false;
 }
 //重置按鈕清空文本框
 private void button2_Click(object sender, EventArgs e)
 {
 txtName.Text = "";
 txtPass.Text = "";
 } 
 //密碼輸入完成后實現(xiàn)敲擊enter鍵觸發(fā)登錄按鈕
 private void txtPass_KeyDown(object sender, KeyEventArgs e)
 {
 if(e.KeyCode == Keys.Enter)
 {
 this.button1_Click(sender, e);
 }
 }
 //實現(xiàn)按enter鍵使焦點轉(zhuǎn)移到下一文本框,與tab鍵通用
 private void txtName_KeyPress(object sender, KeyPressEventArgs e)
 {
 if (e.KeyChar == (char)Keys.Enter)
 {
 SendKeys.Send("{tab}");
 }
 }

效果如下圖:

在這里插入圖片描述

2、主界面功能實現(xiàn)

主要代碼如下:

public static bool isLogin = false;
 int id;
 SqlConnection conn;
 SqlCommand cmd;
 SqlDataAdapter adp;
 DataSet dat;
 public static string username
 {
 get;
 set;
 }
 public Form1()
 {
 InitializeComponent();
 this.label1.BackColor = Color.Transparent;
 this.groupBox1.BackColor = Color.Transparent;
 this.groupBox2.BackColor = Color.Transparent;
 this.dataGridView1.BorderStyle = BorderStyle.None;
 this.dataGridView1.CellBorderStyle = DataGridViewCellBorderStyle.None;
 
 this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
 this.Text += "| 管理員:" + username;
 string ss = ConfigurationManager.ConnectionStrings["Stu"].ToString();
 //建立數(shù)據(jù)庫連接
 conn = new SqlConnection(ss);
 try
 {
 //開啟連接 
 conn.Open();
 // MessageBox.Show("數(shù)據(jù)庫連接成功!"); 
 }
 catch (Exception)
 {
 MessageBox.Show("數(shù)據(jù)庫連接失敗!");
 }
 
 }

 private void Form1_Load(object sender, EventArgs e)
 {
 DataGridViewDataLoad();
 
 //this.stu_dentTableAdapter.Fill(this.students.Stu_dent);

 }

 private void DataGridViewDataLoad()
 {
 String sql1 = "select * from Stu_dent";
 adp = new SqlDataAdapter(sql1,conn);
 dat = new DataSet();
 adp.Fill(dat);
 dataGridView1.DataSource = dat.Tables[0];
 }

 private void button5_Click(object sender, EventArgs e)
 {
 string num = textBox1.Text.Trim();
 string name = textBox2.Text.Trim();
 String sql4 = "Select * from Stu_dent where 1=1";
 if(!String.IsNullOrEmpty(num))
 {
 sql4 += " and StuNum=" + num;
 }
 if(!String.IsNullOrEmpty(name))
 {
 sql4 += " and StuName like '%" + name + "%'";
 }
 adp = new SqlDataAdapter(sql4, conn);
 dat = new DataSet();
 adp.Fill(dat);
 dataGridView1.DataSource = dat.Tables[0];
 
 }
 protected override bool ProcessCmdKey(ref System.Windows.Forms.Message msg, System.Windows.Forms.Keys keyData)
 {
 switch (keyData)
 {
 case Keys.Escape:
 this.Close();//esc關(guān)閉窗體
 break;
 }
 return false;
 }
 private void button1_Click(object sender, EventArgs e)
 {
 AddStudent addStudent = new AddStudent();
 addStudent.StartPosition = FormStartPosition.CenterScreen;
 //addStudent.Show();
 addStudent.ShowDialog();
 DataGridViewDataLoad();
 }

 private void button4_Click(object sender, EventArgs e)
 {
 this.Close();
 }

 private void button2_Click(object sender, EventArgs e)
 {
 MessageBox.Show("請在學(xué)生信息顯示框中雙擊所要刪除學(xué)生所在的那一行即可!?。?,"提示");
 }
 private void button3_Click(object sender, EventArgs e)
 {
 MessageBox.Show("請在學(xué)生信息顯示框中單擊所要刪修改學(xué)生所在的那一行的任意文字區(qū)域即可!", "提示");
 }
 private void dataGridView1_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
 {
 DialogResult result = MessageBox.Show("確定刪除該學(xué)生信息?", "刪除", MessageBoxButtons.OKCancel);
 if(result == DialogResult.OK)
 {
 id = Convert.ToInt32(dataGridView1.Rows[e.RowIndex].Cells[0].Value);
 Console.WriteLine(id);
 string sql2 = "delete from Stu_dent where ID=" + id;
 cmd = new SqlCommand(sql2, conn);
 cmd.ExecuteNonQuery();

 }
 DataGridViewDataLoad();
 }

 private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
 {
 id = Convert.ToInt32(this.dataGridView1.Rows[e.RowIndex].Cells[0].Value);
 UpdateStudent updatestudent = new UpdateStudent(id);
 updatestudent.StartPosition = FormStartPosition.CenterScreen;
 updatestudent.ShowDialog();
 DataGridViewDataLoad();
 }

效果如下:

3、添加學(xué)生信息功能實現(xiàn)

主要代碼如下:

public AddStudent()
 {
 InitializeComponent();
 this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
 string ss = ConfigurationManager.ConnectionStrings["Stu"].ToString();
 //建立數(shù)據(jù)庫連接
 conn = new SqlConnection(ss);
 try
 {
 //開啟連接 
 conn.Open();
 // MessageBox.Show("數(shù)據(jù)庫連接成功!"); 
 }
 catch (Exception)
 {
 MessageBox.Show("數(shù)據(jù)庫連接失敗!");
 }

 }

 private void AddStudent_Load(object sender, EventArgs e)
 {
 
 }

 private void label1_Click(object sender, EventArgs e)
 {

 }
 protected override bool ProcessCmdKey(ref System.Windows.Forms.Message msg, System.Windows.Forms.Keys keyData)
 {
 switch (keyData)
 {
 case Keys.Escape:
 this.Close();//esc關(guān)閉窗體
 break;
 }
 return false;
 }
 private void button1_Click(object sender, EventArgs e)
 {
 string StuNum = textBox1.Text.Trim();
 string StuName = textBox2.Text.Trim();
 int StuAge;
 Int32.TryParse(textBox3.Text.Trim(), out StuAge);
 string StuClass = textBox5.Text.Trim();
 string StuPhone = textBox6.Text.Trim();
 string StuSex = radioButton1.Checked ? "男" : "女";
 if (String.IsNullOrEmpty(StuNum))
 {
 MessageBox.Show("學(xué)號不能為空!");
 }
 if (String.IsNullOrEmpty(StuName))
 {
 MessageBox.Show("姓名不能為空!");
 }
 
 if (String.IsNullOrEmpty(StuClass))
 {
 MessageBox.Show("班級不能為空!");
 }
 if (String.IsNullOrEmpty(StuPhone))
 {
 MessageBox.Show("聯(lián)系方式不能為空!");
 }
 string sql = string.Format("insert into Stu_dent values ('{0}','{1}','{2}','{3}','{4}','{5}')", StuNum, StuName,StuAge,StuSex, StuClass, StuPhone );
 cmd = new SqlCommand(sql, conn);
 int count = cmd.ExecuteNonQuery();
 if (count > 0)
 {
 MessageBox.Show("添加成功!");
 }
 else
 {
 MessageBox.Show("添加失??!");
 }
 this.Close();
 }

4、刪除學(xué)生信息功能實現(xiàn)

在這里采用雙擊所要刪除學(xué)生所在的那一行的任意位置即可

主要代碼如下:

private void dataGridView1_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
 {
 DialogResult result = MessageBox.Show("確定刪除該學(xué)生信息?", "刪除", MessageBoxButtons.OKCancel);
 if(result == DialogResult.OK)
 {
 id = Convert.ToInt32(dataGridView1.Rows[e.RowIndex].Cells[0].Value);
 Console.WriteLine(id);
 string sql2 = "delete from Stu_dent where ID=" + id;
 cmd = new SqlCommand(sql2, conn);
 cmd.ExecuteNonQuery();

 }
 DataGridViewDataLoad();
 }

效果如下圖(雙擊第一行進(jìn)行刪除):

刪除前:

刪除后:

5、修改學(xué)生信息功能實現(xiàn)

在這里采用單擊所要修改學(xué)生所在行任意文字處即可

主要代碼如下:

public UpdateStudent(int id)
 {
 this.id = id;
 string ss = ConfigurationManager.ConnectionStrings["Stu"].ToString();
 conn = new SqlConnection(ss);
 try
 {
 //開啟連接 
 conn.Open();
 // MessageBox.Show("數(shù)據(jù)庫連接成功!"); 
 }
 catch (Exception)
 {
 MessageBox.Show("數(shù)據(jù)庫連接失敗!");
 }
 InitializeComponent();
 this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
 }
 protected override bool ProcessCmdKey(ref System.Windows.Forms.Message msg, System.Windows.Forms.Keys keyData)
 {
 switch (keyData)
 {
 case Keys.Escape:
 this.Close();//esc關(guān)閉窗體
 break;
 }
 return false;
 }
 private void UpdateStudent_Load(object sender, EventArgs e)
 {
 cmd = conn.CreateCommand();
 string sql1 = "select * from Stu_dent where ID=" + id;
 cmd.CommandText = sql1;
 reader = cmd.ExecuteReader();
 if(reader.HasRows)
 {
 reader.Read();
 textBox1.Text = reader.GetString(1);
 textBox2.Text = reader.GetString(2);
 textBox3.Text = reader.GetInt32(3).ToString();
 if(reader.GetString(4) == "男")
 {
 this.radioButton2.Checked = true;
 }
 else
 {
 this.radioButton1.Checked = true;
 }
 textBox5.Text = reader.GetString(5);
 textBox6.Text = reader.GetString(6);
 }

 reader.Close();
 
 }

 private void button1_Click(object sender, EventArgs e)
 {
 string StuNum = textBox1.Text.Trim();
 string StuName = textBox2.Text.Trim();
 int StuAge;
 Int32.TryParse(textBox3.Text.Trim(), out StuAge);
 string StuClass = textBox5.Text.Trim();
 string StuPhone = textBox6.Text.Trim();
 string StuSex = radioButton1.Checked ? "男" : "女";
 if (String.IsNullOrEmpty(StuName))
 {
 MessageBox.Show("姓名不能為空!");
 }

 if (String.IsNullOrEmpty(StuClass))
 {
 MessageBox.Show("班級不能為空!");
 }
 if (String.IsNullOrEmpty(StuPhone))
 {
 MessageBox.Show("聯(lián)系方式不能為空!");
 }
 string sql = string.Format("update Stu_dent set StuName='{0}',StuAge={1},StuSex='{2}',StuClass='{3}',StuPhone='{4}' where StuNum='{5}'", StuName, StuAge, StuSex, StuClass, StuPhone, StuNum);
 cmd = new SqlCommand(sql, conn);
 int count = cmd.ExecuteNonQuery();
 if (count > 0)
 {
 MessageBox.Show("修改成功!");
 }
 else
 {
 MessageBox.Show("修改失敗!");
 }
 this.Close();
 }

 private void button2_Click(object sender, EventArgs e)
 {
 cmd = conn.CreateCommand();
 string sql1 = "select * from Stu_dent where ID=" + id;
 cmd.CommandText = sql1;
 reader = cmd.ExecuteReader();
 if (reader.HasRows)
 {
 reader.Read();
 textBox1.Text = reader.GetString(1);
 textBox2.Text = reader.GetString(2);
 textBox3.Text = reader.GetInt32(3).ToString();
 if (reader.GetString(4) == "男")
 {
 this.radioButton2.Checked = true;
 }
 else
 {
 this.radioButton1.Checked = true;
 }
 textBox5.Text = reader.GetString(5);
 textBox6.Text = reader.GetString(6);
 }

 reader.Close();
 }

(在這里將郭某某的專業(yè)班級為例)

修改前:

修改后:

6、查詢學(xué)生信息功能實現(xiàn)

查詢功能就寫了兩種查詢方式

主要代碼如下:

private void button5_Click(object sender, EventArgs e)
 {
 string num = textBox1.Text.Trim();
 string name = textBox2.Text.Trim();
 String sql4 = "Select * from Stu_dent where 1=1";
 if(!String.IsNullOrEmpty(num))
 {
 sql4 += " and StuNum=" + num;
 }
 if(!String.IsNullOrEmpty(name))
 {
 sql4 += " and StuName like '%" + name + "%'";
 }
 adp = new SqlDataAdapter(sql4, conn);
 dat = new DataSet();
 adp.Fill(dat);
 dataGridView1.DataSource = dat.Tables[0];
 
 }

效果如下:

按學(xué)號查詢:

按姓名查詢:

總結(jié):這是上完c#課后,自己無聊整著玩的,功能實現(xiàn)簡單易懂,比較容易,希望能對你的學(xué)習(xí)有所幫助。對了,每個窗體的背景圖片是我再網(wǎng)上隨便找的,你可以選擇你喜歡的背景。

更多學(xué)習(xí)資料請關(guān)注專題《管理系統(tǒng)開發(fā)》。

以上就是本文的全部內(nèi)容,希望對大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。

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