C#访问SQLite完整增删改查代码

    xiaoxiao2025-02-02  4

    以下代码都是经过我测试可用的;

    一 一个控制台示例

     

    using System; using System.Data.SQLite; namespace SQLiteSamples { class Program { //数据库连接 SQLiteConnection m_dbConnection; static void Main(string[] args) { Program p = new Program(); } public Program() { createNewDatabase(); connectToDatabase(); createTable(); fillTable(); printHighscores(); } //创建一个空的数据库 void createNewDatabase() { SQLiteConnection.CreateFile("MyDatabase.sqlite"); } //创建一个连接到指定数据库 void connectToDatabase() { m_dbConnection = new SQLiteConnection("Data Source=MyDatabase.sqlite;Version=3;"); m_dbConnection.Open(); } //在指定数据库中创建一个table void createTable() { string sql = "create table highscores (name varchar(20), score int)"; SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection); command.ExecuteNonQuery(); } //插入一些数据 void fillTable() { string sql = "insert into highscores (name, score) values ('Me', 3000)"; SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection); command.ExecuteNonQuery(); sql = "insert into highscores (name, score) values ('Myself', 6000)"; command = new SQLiteCommand(sql, m_dbConnection); command.ExecuteNonQuery(); sql = "insert into highscores (name, score) values ('And I', 9001)"; command = new SQLiteCommand(sql, m_dbConnection); command.ExecuteNonQuery(); } //使用sql查询语句,并显示结果 void printHighscores() { string sql = "select * from highscores order by score desc"; SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection); SQLiteDataReader reader = command.ExecuteReader(); while (reader.Read()) Console.WriteLine("Name: " + reader["name"] + "\tScore: " + reader["score"]); Console.ReadLine(); } } }

     

     

     

    二 完整的增删改查代码

     

    using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; using System.Data; using System.Data.SQLite; namespace jyyggl { public partial class Form1 : Form { SQLiteConnection m_dbConnection; bool isupdate; public Form1() { InitializeComponent(); m_dbConnection = new SQLiteConnection("Data Source=jyyggl.sqlite;Version=3;"); m_dbConnection.Open(); isupdate = false; } //添加 private void button2_Click(object sender, EventArgs e) { if (textBox1.Text == "" && textBox2.Text == "" && textBox3.Text == "" && textBox4.Text == "" && textBox5.Text == "" && textBox6.Text == "" && textBox7.Text == "" && textBox8.Text == "") { MessageBox.Show("没有要添加的内容", "员工添加"); return; } else { string sql = "insert into yggl values (null,'" + textBox1.Text + "','" + textBox2.Text + "','" + textBox3.Text + "','" + textBox4.Text + "','" + textBox5.Text + "','" + textBox6.Text + "','" + textBox7.Text + "','" + textBox8.Text + "')"; SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection); command.ExecuteNonQuery(); textBox1.Text = ""; textBox2.Text = ""; textBox3.Text = ""; textBox4.Text = ""; textBox5.Text = ""; textBox6.Text = ""; textBox7.Text = ""; textBox8.Text = ""; databind(); } } private void databind() { DataTable dt = new DataTable(); SQLiteDataAdapter slda = new SQLiteDataAdapter("select * from yggl", m_dbConnection); DataSet ds = new DataSet(); slda.Fill(ds); dt = ds.Tables[0]; dataGridView1.DataSource = dt; } // 浏览 private void button1_Click(object sender, EventArgs e) { databind(); } // 查询 private void button5_Click(object sender, EventArgs e) { DataTable dt = new DataTable(); SQLiteDataAdapter slda = new SQLiteDataAdapter("select * from yggl where name="+"'"+textBox9.Text+"'", m_dbConnection); DataSet ds = new DataSet(); slda.Fill(ds); dt = ds.Tables[0]; dataGridView1.DataSource = dt; } //删除 private void button3_Click(object sender, EventArgs e) { if (dataGridView1.SelectedRows.Count < 1 || dataGridView1.SelectedRows[0].Cells[1].Value == null) { MessageBox.Show("没有选中行。", "员工管理"); } else { object oid = dataGridView1.SelectedRows[0].Cells[0].Value; if (DialogResult.No == MessageBox.Show("将删除第 " + (dataGridView1.CurrentCell.RowIndex + 1).ToString() + " 行,确定?", "员工管理", MessageBoxButtons.YesNo)) { return; } else { string sql = "delete from yggl where id=" + oid; SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection); command.ExecuteNonQuery(); } databind(); } } private void dataGridView1_SelectionChanged(object sender, EventArgs e) { if (isupdate == true && dataGridView1.SelectedRows.Count>=1) { textBox1.Text = dataGridView1.SelectedRows[0].Cells[1].Value.ToString(); textBox2.Text = dataGridView1.SelectedRows[0].Cells[2].Value.ToString(); textBox3.Text = dataGridView1.SelectedRows[0].Cells[3].Value.ToString(); textBox4.Text = dataGridView1.SelectedRows[0].Cells[4].Value.ToString(); textBox5.Text = dataGridView1.SelectedRows[0].Cells[5].Value.ToString(); textBox6.Text = dataGridView1.SelectedRows[0].Cells[6].Value.ToString(); textBox7.Text = dataGridView1.SelectedRows[0].Cells[7].Value.ToString(); textBox8.Text = dataGridView1.SelectedRows[0].Cells[8].Value.ToString(); } } private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e) { } private void Form1_Load(object sender, EventArgs e) { databind(); dataGridView1.Columns[0].Visible = false; dataGridView1.Columns[1].HeaderCell.Value = "姓名"; dataGridView1.Columns[2].HeaderCell.Value = "部门"; dataGridView1.Columns[3].HeaderCell.Value = "职务"; dataGridView1.Columns[4].HeaderCell.Value = "性别"; dataGridView1.Columns[5].HeaderCell.Value = "身份证号"; dataGridView1.Columns[6].HeaderCell.Value = "学历"; dataGridView1.Columns[7].HeaderCell.Value = "手机"; dataGridView1.Columns[8].HeaderCell.Value = "备注"; } // 开始更新 private void button6_Click(object sender, EventArgs e) { isupdate = true; button4.Enabled = true; button7.Enabled = true; button1.Enabled = false; button2.Enabled = false; button3.Enabled = false; button6.Enabled = false; if (dataGridView1.SelectedRows.Count >0) { dataGridView1.SelectedRows[0].Selected = false; } } // 结束更新 private void button7_Click(object sender, EventArgs e) { isupdate = false; button4.Enabled = false; button7.Enabled = false; textBox1.Text = ""; textBox2.Text = ""; textBox3.Text = ""; textBox4.Text = ""; textBox5.Text = ""; textBox6.Text = ""; textBox7.Text = ""; textBox8.Text = ""; button1.Enabled = true; button2.Enabled = true; button3.Enabled = true; button6.Enabled = true; } // 更新 private void button4_Click(object sender, EventArgs e) { if (dataGridView1.SelectedRows.Count < 1 || dataGridView1.SelectedRows[0].Cells[1].Value==null) { MessageBox.Show("没有选中行。", "员工管理"); } else { UPDATE Person SET Address = 'Zhongshan 23', City = 'Nanjing'WHERE LastName = 'Wilson' object oid = dataGridView1.SelectedRows[0].Cells[0].Value; string sql = "update yggl set name = '" + textBox1.Text + "',part='" + textBox2.Text + "',zhiwu='" + textBox3.Text + "',sex='" + textBox4.Text + "',shfzhhao='" + textBox5.Text + "',xueli='" + textBox6.Text + "',shouji='" + textBox7.Text + "',demo='" + textBox8.Text + "'" + "where id=" + oid; SQLiteCommand command = new SQLiteCommand(sql, m_dbConnection); command.ExecuteNonQuery(); databind(); } } } }

    配合datagridview控件使用;

     

    System.Data.SQLite.dll下载,

    http://pan.baidu.com/s/1i4L6FkT

     

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