首先导入需要的命名空间

using System.Data.OleDb;

然后在界面上添加dataGridView控件和相关按钮

功能点1：将数据库中的数据显示在界面的dataGridView控件上

         /// <summary>/// 将数据库中的数据显示在界面上/// </summary>public void viewAccessInfo(){//【1】连接数据库string connect_str = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=FileSys.mdb";OleDbConnection thisConnection = new OleDbConnection(connect_str);//【2】编写SQL指令，星号（*）是选取所有列的快捷方式。string sql = "select * from FileRecive";//【3】OleDbDataAdapter是 DataSet 和数据源之间的桥梁，用于检索和保存数据。OleDbDataAdapter thisAdapter = new OleDbDataAdapter(sql, thisConnection);//【4】DataSet可以理解成在应用程序中的数据库DataSet thisDataSet = new System.Data.DataSet();//使用 Fill 将数据从数据源加载到 DataSet 中thisAdapter.Fill(thisDataSet, "FileRecive");//【5】DataTable可以理解成DataSet的一个表格；将table中的表格内容添加到datatableDataTable dt = thisDataSet.Tables["FileRecive"];//【6】将数据表和dataGridView1进行绑定dataGridView1.DataSource = dt;//【7】关闭连接thisConnection.Close();}

功能点2：连接数据库并执行SQL命令

        /// <summary>/// 执行SQL语句/// </summary>/// <param name="sql"> 要执行的SQL语句 </param>/// <param name="thisConnection"> 数据库连接 </param>/// <returns></returns>public int ExcuteSql(string sql, OleDbConnection thisConnection){int rows = 0;OleDbCommand cmd = new OleDbCommand(sql, thisConnection);thisConnection.Open();rows = cmd.ExecuteNonQuery();thisConnection.Close();return rows;}

功能点3：点击按钮，将界面上用户输入的数据记录插入的到MDB数据库中

        /// <summary>/// 向数据库中添加记录/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button_addItem_Click(object sender, EventArgs e){var ID = textBox_id.Text;var swsj = dateTimePicker_swsj.Value;var swh = textBox_swh.Text;var lwbt = textBox_lwbt.Text;var zyldps = richTextBox_zyldps.Text;var fgldps = richTextBox_fgldps.Text;var cbr = textBox_cbr.Text;var cbsj = dateTimePicker_cbsj.Value;var wjgd = textBox_wjgd.Text;string sql = string.Format("insert into FileRecive (ID,swsj,swh,lwbt,zyldps,fgldps,cbr,cbsj,wjgd) values ('{0}', '{1}','{2}', '{3}','{4}','{5}','{6}','{7}','{8}')",ID, swsj, swh, lwbt, zyldps, fgldps, cbr, cbsj, wjgd);string connect_str = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=FileSys.mdb";OleDbConnection thisConnection = new OleDbConnection(connect_str);ExcuteSql(sql, thisConnection);thisConnection.Close();}

功能点4：点击按钮，将datagridview控件的内容更新到数据库

         private void button_savedata_Click(object sender, EventArgs e){string str = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=FileSys.mdb";OleDbConnection conn = new OleDbConnection(str);var dt = (DataTable)dataGridView1.DataSource;OleDbDataAdapter adp = new OleDbDataAdapter("select * from FileRecive", conn);OleDbCommandBuilder cmdb = new OleDbCommandBuilder(adp);adp.Update(dt);conn.Close();}