实例介绍
【实例简介】
【实例截图】
【实例截图】

【核心代码】
using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace MyDB { /// <summary> /// Form1 的摘要说明。 /// </summary> public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.Panel panel1; private System.Windows.Forms.Splitter splitter1; private System.Data.OleDb.OleDbConnection oleDbConnection1; private System.Data.OleDb.OleDbCommand oleDbSelectCommand1; private System.Data.OleDb.OleDbCommand oleDbInsertCommand1; private System.Data.OleDb.OleDbCommand oleDbUpdateCommand1; private System.Data.OleDb.OleDbCommand oleDbDeleteCommand1; private System.Data.OleDb.OleDbDataAdapter oleDbDataAdapter1; private System.Windows.Forms.Button button1; private System.Windows.Forms.Label label1; private System.Windows.Forms.ComboBox comboBox1; private System.Windows.Forms.Label label2; private System.Windows.Forms.TextBox textBox1; private System.Windows.Forms.ListView listView1; /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.Container components = null; public Form1() { // // Windows 窗体设计器支持所必需的 // InitializeComponent(); // // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // } /// <summary> /// 清理所有正在使用的资源。 /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows 窗体设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要使用代码编辑器修改 /// 此方法的内容。 /// </summary> private void InitializeComponent() { this.panel1 = new System.Windows.Forms.Panel(); this.textBox1 = new System.Windows.Forms.TextBox(); this.label2 = new System.Windows.Forms.Label(); this.comboBox1 = new System.Windows.Forms.ComboBox(); this.label1 = new System.Windows.Forms.Label(); this.button1 = new System.Windows.Forms.Button(); this.splitter1 = new System.Windows.Forms.Splitter(); this.oleDbConnection1 = new System.Data.OleDb.OleDbConnection(); this.oleDbSelectCommand1 = new System.Data.OleDb.OleDbCommand(); this.oleDbInsertCommand1 = new System.Data.OleDb.OleDbCommand(); this.oleDbUpdateCommand1 = new System.Data.OleDb.OleDbCommand(); this.oleDbDeleteCommand1 = new System.Data.OleDb.OleDbCommand(); this.oleDbDataAdapter1 = new System.Data.OleDb.OleDbDataAdapter(); this.listView1 = new System.Windows.Forms.ListView(); this.panel1.SuspendLayout(); this.SuspendLayout(); // // panel1 // this.panel1.Controls.Add(this.textBox1); this.panel1.Controls.Add(this.label2); this.panel1.Controls.Add(this.comboBox1); this.panel1.Controls.Add(this.label1); this.panel1.Controls.Add(this.button1); this.panel1.Dock = System.Windows.Forms.DockStyle.Top; this.panel1.Location = new System.Drawing.Point(0, 0); this.panel1.Name = "panel1"; this.panel1.Size = new System.Drawing.Size(408, 40); this.panel1.TabIndex = 0; // // textBox1 // this.textBox1.Location = new System.Drawing.Point(256, 8); this.textBox1.Name = "textBox1"; this.textBox1.Size = new System.Drawing.Size(64, 21); this.textBox1.TabIndex = 4; this.textBox1.Text = ""; // // label2 // this.label2.Location = new System.Drawing.Point(184, 16); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(80, 16); this.label2.TabIndex = 3; this.label2.Text = "设置查询值:"; // // comboBox1 // this.comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList; this.comboBox1.Items.AddRange(new object[] { "客户ID", "公司名称", "联系人姓名", "联系人头衔", "地址", "城市", "地区", "邮政编码", "国家", "电话", "传真", "所有记录"}); this.comboBox1.Location = new System.Drawing.Point(96, 8); this.comboBox1.Name = "comboBox1"; this.comboBox1.Size = new System.Drawing.Size(88, 20); this.comboBox1.TabIndex = 2; // // label1 // this.label1.Location = new System.Drawing.Point(8, 16); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(96, 16); this.label1.TabIndex = 1; this.label1.Text = "选择查询条件:"; // // button1 // this.button1.Location = new System.Drawing.Point(328, 8); this.button1.Name = "button1"; this.button1.TabIndex = 0; this.button1.Text = "开始查询"; this.button1.Click = new System.EventHandler(this.button1_Click); // // splitter1 // this.splitter1.Dock = System.Windows.Forms.DockStyle.Top; this.splitter1.Location = new System.Drawing.Point(0, 40); this.splitter1.Name = "splitter1"; this.splitter1.Size = new System.Drawing.Size(408, 3); this.splitter1.TabIndex = 1; this.splitter1.TabStop = false; // // oleDbConnection1 // this.oleDbConnection1.ConnectionString = @"Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Registry Path=;Jet OLEDB:Database Locking Mode=1;Jet OLEDB:Database Password=;Data Source=""Northwind.mdb"";Password=;Jet OLEDB:Engine Type=5;Jet OLEDB:Global Bulk Transactions=1;Provider=""Microsoft.Jet.OLEDB.4.0"";Jet OLEDB:System database=;Jet OLEDB:SFP=False;Extended Properties=;Mode=Share Deny None;Jet OLEDB:New Database Password=;Jet OLEDB:Create System Database=False;Jet OLEDB:Don't Copy Locale on Compact=False;Jet OLEDB:Compact Without Replica Repair=False;User ID=Admin;Jet OLEDB:Encrypt Database=False"; // // oleDbSelectCommand1 // this.oleDbSelectCommand1.CommandText = "SELECT * FROM 客户 "; this.oleDbSelectCommand1.Connection = this.oleDbConnection1; // // oleDbDataAdapter1 // this.oleDbDataAdapter1.DeleteCommand = this.oleDbDeleteCommand1; this.oleDbDataAdapter1.InsertCommand = this.oleDbInsertCommand1; this.oleDbDataAdapter1.SelectCommand = this.oleDbSelectCommand1; this.oleDbDataAdapter1.UpdateCommand = this.oleDbUpdateCommand1; // // listView1 // this.listView1.Dock = System.Windows.Forms.DockStyle.Fill; this.listView1.FullRowSelect = true; this.listView1.GridLines = true; this.listView1.Location = new System.Drawing.Point(0, 43); this.listView1.Name = "listView1"; this.listView1.Size = new System.Drawing.Size(408, 259); this.listView1.TabIndex = 2; // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(408, 302); this.Controls.Add(this.listView1); this.Controls.Add(this.splitter1); this.Controls.Add(this.panel1); this.Name = "Form1"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; this.Text = "演示使用列表视图显示数据库信息"; this.Load = new System.EventHandler(this.Form1_Load); this.Closed = new System.EventHandler(this.Form1_Closed); this.panel1.ResumeLayout(false); this.ResumeLayout(false); } #endregion /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); } private void Form1_Load(object sender, System.EventArgs e) {//显示所有记录 string StrSQL="SELECT * FROM 客户"; this.oleDbDataAdapter1.SelectCommand.CommandText=StrSQL; this.oleDbDataAdapter1.SelectCommand.Connection=this.oleDbConnection1; //打开数据库连接 this.oleDbConnection1.Open(); System.Data.OleDb.OleDbDataReader MyReader=this.oleDbDataAdapter1.SelectCommand.ExecuteReader(); this.listView1.View=View.Details; for(int i=0;i<MyReader.FieldCount-1;i ) { this.listView1.Columns.Add(MyReader.GetName(i),100,HorizontalAlignment.Left); } while(MyReader.Read()) { ListViewItem MyItem=new ListViewItem(); MyItem.Text=MyReader.GetString(0); for(int j=0;j<MyReader.FieldCount-2;j ) MyItem.SubItems.Add(MyReader.GetString(j 1)); this.listView1.Items.Add(MyItem); } //关闭连接 this.oleDbConnection1.Close(); } private void button1_Click(object sender, System.EventArgs e) {//使用ListView控件显示查询记录结果 try { string StrSQL="SELECT * FROM 客户 WHERE "; StrSQL =this.comboBox1.Text " LIKE '"; StrSQL =this.textBox1.Text "'"; if(this.comboBox1.Text=="所有记录") StrSQL="SELECT * FROM 客户"; this.oleDbDataAdapter1.SelectCommand.CommandText=StrSQL; this.oleDbDataAdapter1.SelectCommand.Connection=this.oleDbConnection1; //打开数据库连接 this.oleDbConnection1.Open(); System.Data.OleDb.OleDbDataReader MyReader=this.oleDbDataAdapter1.SelectCommand.ExecuteReader(); this.listView1.Clear(); this.listView1.View=View.Details; for(int i=0;i<MyReader.FieldCount-1;i ) { this.listView1.Columns.Add(MyReader.GetName(i),100,HorizontalAlignment.Left); } while(MyReader.Read()) { ListViewItem MyItem=new ListViewItem(); MyItem.Text=MyReader.GetString(0); for(int j=0;j<MyReader.FieldCount-2;j ) MyItem.SubItems.Add(MyReader.GetString(j 1)); this.listView1.Items.Add(MyItem); } //关闭连接 this.oleDbConnection1.Close(); } catch(Exception Err) { MessageBox.Show("查询数据集记录操作失败:" Err.Message,"信息提示", MessageBoxButtons.OK,MessageBoxIcon.Information); //如果打开了连接,则关闭它 if(this.oleDbConnection1.State==ConnectionState.Open) { this.oleDbConnection1.Close(); } } } private void Form1_Closed(object sender, System.EventArgs e) {//关闭程序 //如果打开了连接,则关闭它 if(this.oleDbConnection1.State==ConnectionState.Open) { this.oleDbConnection1.Close(); } } } }
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