這篇文章主要介紹了C#如何實(shí)現(xiàn)學(xué)員信息管理系統(tǒng),具有一定借鑒價(jià)值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
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代碼如下
//登陸入口頁面 using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Data.SqlClient; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace 學(xué)員管理系統(tǒng) { public partial class Lo : Form { public Lo() { InitializeComponent(); } string sql= "Data Source=LAPTOP-PCMBBB0N;Initial Catalog=DB_Student;Trusted_Connection=true;"; private void Log_Load(object sender, EventArgs e) { this.FormBorderStyle = FormBorderStyle.FixedToolWindow; this.Location = new Point(Screen.PrimaryScreen.Bounds.Width / 2 - this.Width / 2, Screen.PrimaryScreen.Bounds.Height / 2 - this.Height / 2); } Main main; private void button1_Click(object sender, EventArgs e) { try { string pwd =txtpwd.Text; if (pwd.ToString() == "") { label2.Visible = true; label2.Text = "密碼不能為空!"; } else { if (pwd.Equals((table.Rows[0]["Pwd"]).ToString())) { label2.Visible = false; main = new Main(); main.Show(); this.Visible = false; } else { label2.Text = "密碼不正確!"; label2.Visible = true; } } } catch (Exception) { throw; } } DataTable table = new DataTable(); private void txtid_Leave(object sender, EventArgs e) { try { int id = int.Parse(txtid.Text); //1.鏈接數(shù)據(jù)庫對(duì)象 SqlConnection sqlcon = new SqlConnection(sql); //3.創(chuàng)建數(shù)據(jù)庫命令對(duì)象 SqlCommand cmd = new SqlCommand(); cmd.Connection = sqlcon; cmd.CommandText = "SELECT * FROM Student WHERE ID=" + id; //5.數(shù)據(jù)適配器對(duì)象 SqlDataAdapter sda = new SqlDataAdapter(); sda.SelectCommand = cmd; //6.這個(gè)table可以用來接受適配的最終結(jié)果 sda.Fill(table); if (table.Rows.Count > 0) { label1.Visible = false; } else { label1.Visible = true; label1.Text = "輸入ID不存在!"; } } catch (Exception) { label1.Visible = true; label1.Text = "請(qǐng)輸入純數(shù)字ID!"; txtid.Focus(); txtid.Text = ""; } } private void button2_Click_1(object sender, EventArgs e) { Register register = new Register(); register.ShowDialog(); this.Visible = true; label1.Visible = false; } } }
//注冊頁面 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; namespace 學(xué)員管理系統(tǒng) { public partial class Register : Form { public Register() { InitializeComponent(); } string sql = "Data Source=LAPTOP-PCMBBB0N;Initial Catalog=DB_Student;Trusted_Connection=true;"; private void button1_Click(object sender, EventArgs e) { try { SqlConnection sqlCon = new SqlConnection(sql); string sqltxt = string.Format("INSERT INTO Student VALUES('{0}','{1}','{2}','{3}','{4}')", textBox2.Text, textBox1.Text, textBox3.Text, textBox4.Text, textBox5.Text); SqlCommand cmd = new SqlCommand(sqltxt, sqlCon); sqlCon.Open(); int res = cmd.ExecuteNonQuery(); if (res > 0) { MessageBox.Show("注冊成功"); textBox1.Text = ""; textBox2.Text = ""; textBox3.Text = ""; textBox4.Text = ""; textBox5.Text = ""; textBox1.Focus(); } } catch (Exception) { throw; } }
//信息頁面(可以進(jìn)行數(shù)據(jù)庫信息更改,刪除,查看 以及翻頁操作) 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; namespace 學(xué)員管理系統(tǒng) { public partial class Main : Form { public Main() { InitializeComponent(); } string strcon = "Data Source=LAPTOP-PCMBBB0N;Initial Catalog=DB_Student;Trusted_Connection=true;"; int countPage; int nowPage = 1; SqlConnection sqlCon; private void Main_Load(object sender, EventArgs e) { sqlCon = new SqlConnection(strcon); //綁定頁碼信息 try { string sql = "SELECT COUNT(*) FROM Student"; SqlCommand cmdl = new SqlCommand(sql, sqlCon); sqlCon.Open(); object res = cmdl.ExecuteScalar(); if (res != null) { if ((int)res % 6 > 0) { countPage = ((int)res / 6) + 1; } else { countPage = (int)res / 6; } } } catch (Exception) { throw; } finally { sqlCon.Close(); } //初始信息綁定 try { SetPage(sqlCon); dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill; dataGridView1.RowHeadersVisible = false; foreach (DataGridViewColumn dc in dataGridView1.Columns) { dc.SortMode = DataGridViewColumnSortMode.Programmatic; } dataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter; dataGridView1.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter; dataGridView1.ScrollBars = ScrollBars.None; dataGridView1.MultiSelect = false; dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect; dataGridView1.AllowUserToResizeRows = false; dataGridView1.AllowUserToResizeColumns = false; dataGridView1.ScrollBars = ScrollBars.None; dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill; dataGridView1.AllowUserToAddRows = false; dataGridView1.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter; dataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter; foreach (DataGridViewColumn item in dataGridView1.Columns) { item.SortMode = DataGridViewColumnSortMode.NotSortable; } dataGridView1.ReadOnly = true; dataGridView1.CellMouseDown += DataGridView1_CellMouseDown; } catch (Exception ex) { throw; } finally { sqlCon.Close(); } } private void SetPage(SqlConnection sqlCon) { string sql = string.Format("SELECT ID AS '賬號(hào)',NAME AS '姓名',Sex AS '性別',Age AS '年齡',Zhanli AS '電話' FROM Student WHERE ID IN(SELECT TOP(6) ID FROM Student WHERE ID NOT IN (SELECT TOP({0}) ID FROM Student ORDER BY ID)ORDER BY ID ) ORDER BY ID", (nowPage - 1) * 6); SqlCommand cmd = new SqlCommand(sql, sqlCon); SqlDataAdapter sda = new SqlDataAdapter(cmd); DataSet ds = new DataSet(); sda.Fill(ds); dataGridView1.DataSource = ds.Tables[0]; label1.Text = nowPage.ToString(); label3.Text = countPage.ToString(); } private void DataGridView1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e) { if (e.Button == MouseButtons.Right && dataGridView1.SelectedRows.Count > 0) { dataGridView1.ClearSelection(); dataGridView1.Rows[e.RowIndex].Selected = true; ID.Idd = (int)dataGridView1.SelectedCells[0].Value; contextMenuStrip1.Show(); } } private void 刪除ToolStripMenuItem1_Click(object sender, EventArgs e) { try { SqlConnection sqlCon = new SqlConnection(strcon); string sqltxt = "DELETE FROM Student WHERE ID=" + ID.Idd; SqlCommand cmd = new SqlCommand(sqltxt, sqlCon); sqlCon.Open(); int res = cmd.ExecuteNonQuery(); if (res > 0) { MessageBox.Show("刪除成功!"); Main ma = new 學(xué)員管理系統(tǒng).Main(); ma.Show(); this.Visible = false; } } catch (Exception) { throw; } } private void 修改密碼ToolStripMenuItem_Click(object sender, EventArgs e) { xiugai xiu = new xiugai(); xiu.ShowDialog(); this.Visible = false; } private void 查看詳細(xì)信息ToolStripMenuItem_Click(object sender, EventArgs e) { chakan cha = new chakan(); cha.ShowDialog(); this.Visible = false; } private void 下一頁ToolStripMenuItem_Click(object sender, EventArgs e) { if (nowPage >= countPage) { return; } else { nowPage++; SetPage(sqlCon); } } private void 上一頁ToolStripMenuItem_Click(object sender, EventArgs e) { if (nowPage <= 1) { return; } else { nowPage--; SetPage(sqlCon); } } } }
/查看詳細(xì)信息 using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Data.SqlClient; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; namespace 學(xué)員管理系統(tǒng) { public partial class chakan : Form { public chakan() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { Main ma = new 學(xué)員管理系統(tǒng).Main(); ma.Show(); this.Visible = false; } string sql = "Data Source=LAPTOP-PCMBBB0N;Initial Catalog=DB_Student;Trusted_Connection=true;"; private void chakan_Load(object sender, EventArgs e) { try { SqlConnection sqlcon = new SqlConnection(sql); string sqltxt = "SELECT * FROM Student WHERE ID="+ID.Idd; SqlCommand cmd = new SqlCommand(sqltxt, sqlcon); sqlcon.Open(); SqlDataAdapter sda = new SqlDataAdapter(cmd); DataTable table = new DataTable(); sda.Fill(table); Name1.Text = (table.Rows[0]["NAME"]).ToString(); ID1.Text = (table.Rows[0]["ID"]).ToString(); Pwd.Text = (table.Rows[0]["Pwd"]).ToString(); Sex.Text = (table.Rows[0]["Sex"]).ToString(); Age.Text = (table.Rows[0]["Age"]).ToString(); Zhanli.Text = (table.Rows[0]["Zhanli"]).ToString(); } catch (Exception) { throw; } } } }
//創(chuàng)建一個(gè)類用來存儲(chǔ)用戶賬號(hào) using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace 學(xué)員管理系統(tǒng) { public class ID { public static int idd; public static int Idd { get { return idd; } set { idd = value; } } } }
//修改密碼 using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using System.Data.SqlClient; namespace 學(xué)員管理系統(tǒng) { public partial class xiugai : Form { public xiugai() { InitializeComponent(); } string sql = "Data Source=LAPTOP-PCMBBB0N;Initial Catalog=DB_Student;Trusted_Connection=true;"; private void button1_Click(object sender, EventArgs e) { string yuan = textBox1.Text; string New = textBox2.Text; string New2 = textBox3.Text; if (yuan=="") { label4.Visible = true; textBox1.Focus(); } else { if (New=="") { label5.Visible = true; textBox2.Focus(); } else { if (New2==""||New2!=New) { label6.Visible = true; textBox3.Focus(); } else { try { int num = int.Parse(yuan); SqlConnection sqlcon = new SqlConnection(sql); string sqltext = "UPDATE Student SET Pwd=" + New2 + "WHERE ID="+ID.Idd; //string sqltext = "UPDATE StudentInfor SET Pwd=" + New2 + "WHERE ID="+ID.Idd; SqlCommand cmd = new SqlCommand(sqltext,sqlcon); sqlcon.Open(); int res = cmd.ExecuteNonQuery(); if (res>0) { MessageBox.Show("修改成功"); } } catch (Exception) { throw; } } } } } } }
C#是一個(gè)簡單、通用、面向?qū)ο蟮木幊陶Z言,它由微軟Microsoft開發(fā),繼承了C和C++強(qiáng)大功能,并且去掉了一些它們的復(fù)雜特性,C#綜合了VB簡單的可視化操作和C++的高運(yùn)行效率,以其強(qiáng)大的操作能力、優(yōu)雅的語法風(fēng)格、創(chuàng)新的語言特性和便捷的面向組件編程從而成為.NET開發(fā)的首選語言,但它不適用于編寫時(shí)間急迫或性能非常高的代碼,因?yàn)镃#缺乏性能極高的應(yīng)用程序所需要的關(guān)鍵功能。
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