C#實(shí)現(xiàn)簡(jiǎn)單學(xué)生信息管理系統(tǒng)
本文實(shí)例為大家分享了C#實(shí)現(xiàn)簡(jiǎn)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(yùn)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(shí)現(xiàn)步驟
1、登陸界面功能實(shí)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(duì)登錄按鈕的事件實(shí)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(kāi)啟連接 conn.Open(); // MessageBox.Show("數(shù)據(jù)庫(kù)連接成功!"); } catch (Exception) { //MessageBox.Show("數(shù)據(jù)庫(kù)連接失敗!"); } String uname = txtName.Text.Trim(); string pword = txtPass.Text.Trim(); if(uname == ""|| pword == "") { MessageBox.Show("請(qǐng)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(cuò)誤!"); return; } else { Form1.isLogin = true; Form1.username = this.txtName.Text; this.Close(); } cmd.Clone(); } conn.Close(); } //實(shí)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(shí)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(shí)現(xiàn)按enter鍵使焦點(diǎn)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:
2、主界面功能實(shí)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(kù)連接 conn = new SqlConnection(ss); try { //開(kāi)啟連接 conn.Open(); // MessageBox.Show("數(shù)據(jù)庫(kù)連接成功!"); } catch (Exception) { MessageBox.Show("數(shù)據(jù)庫(kù)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(qǐng)?jiān)趯W(xué)生信息顯示框中雙擊所要?jiǎng)h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(qǐng)?jiān)趯W(xué)生信息顯示框中單擊所要?jiǎng)h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(shí)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(kù)連接 conn = new SqlConnection(ss); try { //開(kāi)啟連接 conn.Open(); // MessageBox.Show("數(shù)據(jù)庫(kù)連接成功!"); } catch (Exception) { MessageBox.Show("數(shù)據(jù)庫(kù)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(hào)不能為空!"); } if (String.IsNullOrEmpty(StuName)) { MessageBox.Show("姓名不能為空!"); } if (String.IsNullOrEmpty(StuClass)) { MessageBox.Show("班級(jí)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(shí)現(xiàn)
在這里采用雙擊所要?jiǎng)h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(shí)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(kāi)啟連接 conn.Open(); // MessageBox.Show("數(shù)據(jù)庫(kù)連接成功!"); } catch (Exception) { MessageBox.Show("數(shù)據(jù)庫(kù)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(jí)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?。?); } 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(jí)為例)
修改前:
修改后:
6、查詢學(xué)生信息功能實(shí)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(hào)查詢:
按姓名查詢:
總結(jié):這是上完c#課后,自己無(wú)聊整著玩的,功能實(shí)現(xiàn)簡(jiǎn)單易懂,比較容易,希望能對(duì)你的學(xué)習(xí)有所幫助。對(duì)了,每個(gè)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(qǐng)關(guān)注專題《管理系統(tǒng)開(kāi)發(fā)》。
以上就是本文的全部?jī)?nèi)容,希望對(duì)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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