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.Windows.Forms.DataGrid dataGrid1;
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.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.OleDbConnection oleDbConnection1;
private System.Data.OleDb.OleDbDataAdapter oleDbDataAdapter1;
private System.Data.DataSet dataSet1;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.Label label4;
/// <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.dataGrid1 = new System.Windows.Forms.DataGrid();
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.oleDbConnection1 = new System.Data.OleDb.OleDbConnection();
this.oleDbDataAdapter1 = new System.Data.OleDb.OleDbDataAdapter();
this.dataSet1 = new System.Data.DataSet();
this.label3 = new System.Windows.Forms.Label();
this.label4 = new System.Windows.Forms.Label();
this.panel1.SuspendLayout();
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.dataSet1)).BeginInit();
this.SuspendLayout();
//
// panel1
//
this.panel1.Controls.Add(this.label4);
this.panel1.Controls.Add(this.label3);
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, 80);
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[] {
"所有记录",
"订单ID",
"客户ID",
"雇员ID",
"订购日期",
"到货日期",
"发货日期",
"运货商",
"运货费",
"货主名称",
"货主地址",
"货主城市",
"货主地区",
"货主邮政编码",
"货主国家"});
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, 80);
this.splitter1.Name = "splitter1";
this.splitter1.Size = new System.Drawing.Size(408, 3);
this.splitter1.TabIndex = 1;
this.splitter1.TabStop = false;
//
// dataGrid1
//
this.dataGrid1.CaptionVisible = false;
this.dataGrid1.DataMember = "";
this.dataGrid1.Dock = System.Windows.Forms.DockStyle.Fill;
this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.dataGrid1.Location = new System.Drawing.Point(0, 83);
this.dataGrid1.Name = "dataGrid1";
this.dataGrid1.Size = new System.Drawing.Size(408, 211);
this.dataGrid1.TabIndex = 2;
//
// oleDbSelectCommand1
//
this.oleDbSelectCommand1.CommandText = "SELECT * FROM 订单";
this.oleDbSelectCommand1.Connection = this.oleDbConnection1;
//
// oleDbInsertCommand1
//
this.oleDbInsertCommand1.CommandText = "INSERT INTO 订单(到货日期, 订购日期, 发货日期, 雇员ID, 货主城市, 货主地区, 货主地址, 货主国家, 货主名称, 货主邮政编码, 客户ID"
", 运货费, 运货商) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)";
this.oleDbInsertCommand1.Connection = this.oleDbConnection1;
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("到货日期", System.Data.OleDb.OleDbType.DBDate, 0, "到货日期"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("订购日期", System.Data.OleDb.OleDbType.DBDate, 0, "订购日期"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("发货日期", System.Data.OleDb.OleDbType.DBDate, 0, "发货日期"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("雇员ID", System.Data.OleDb.OleDbType.Integer, 0, "雇员ID"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("货主城市", System.Data.OleDb.OleDbType.VarWChar, 15, "货主城市"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("货主地区", System.Data.OleDb.OleDbType.VarWChar, 15, "货主地区"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("货主地址", System.Data.OleDb.OleDbType.VarWChar, 60, "货主地址"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("货主国家", System.Data.OleDb.OleDbType.VarWChar, 15, "货主国家"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("货主名称", System.Data.OleDb.OleDbType.VarWChar, 40, "货主名称"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("货主邮政编码", System.Data.OleDb.OleDbType.VarWChar, 10, "货主邮政编码"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("客户ID", System.Data.OleDb.OleDbType.VarWChar, 5, "客户ID"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("运货费", System.Data.OleDb.OleDbType.Currency, 0, "运货费"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("运货商", System.Data.OleDb.OleDbType.Integer, 0, "运货商"));
//
// oleDbUpdateCommand1
//
this.oleDbUpdateCommand1.CommandText = @"UPDATE 订单 SET 到货日期 = ?, 订购日期 = ?, 发货日期 = ?, 雇员ID = ?, 货主城市 = ?, 货主地区 = ?, 货主地址 = ?, 货主国家 = ?, 货主名称 = ?, 货主邮政编码 = ?, 客户ID = ?, 运货费 = ?, 运货商 = ? WHERE (订单ID = ?) AND (到货日期 = ? OR ? IS NULL AND 到货日期 IS NULL) AND (发货日期 = ? OR ? IS NULL AND 发货日期 IS NULL) AND (客户ID = ? OR ? IS NULL AND 客户ID IS NULL) AND (订购日期 = ? OR ? IS NULL AND 订购日期 IS NULL) AND (货主名称 = ? OR ? IS NULL AND 货主名称 IS NULL) AND (货主国家 = ? OR ? IS NULL AND 货主国家 IS NULL) AND (货主地区 = ? OR ? IS NULL AND 货主地区 IS NULL) AND (货主地址 = ? OR ? IS NULL AND 货主地址 IS NULL) AND (货主城市 = ? OR ? IS NULL AND 货主城市 IS NULL) AND (货主邮政编码 = ? OR ? IS NULL AND 货主邮政编码 IS NULL) AND (运货商 = ? OR ? IS NULL AND 运货商 IS NULL) AND (运货费 = ? OR ? IS NULL AND 运货费 IS NULL) AND (雇员ID = ? OR ? IS NULL AND 雇员ID IS NULL)";
this.oleDbUpdateCommand1.Connection = this.oleDbConnection1;
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("到货日期", System.Data.OleDb.OleDbType.DBDate, 0, "到货日期"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("订购日期", System.Data.OleDb.OleDbType.DBDate, 0, "订购日期"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("发货日期", System.Data.OleDb.OleDbType.DBDate, 0, "发货日期"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("雇员ID", System.Data.OleDb.OleDbType.Integer, 0, "雇员ID"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("货主城市", System.Data.OleDb.OleDbType.VarWChar, 15, "货主城市"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("货主地区", System.Data.OleDb.OleDbType.VarWChar, 15, "货主地区"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("货主地址", System.Data.OleDb.OleDbType.VarWChar, 60, "货主地址"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("货主国家", System.Data.OleDb.OleDbType.VarWChar, 15, "货主国家"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("货主名称", System.Data.OleDb.OleDbType.VarWChar, 40, "货主名称"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("货主邮政编码", System.Data.OleDb.OleDbType.VarWChar, 10, "货主邮政编码"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("客户ID", System.Data.OleDb.OleDbType.VarWChar, 5, "客户ID"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("运货费", System.Data.OleDb.OleDbType.Currency, 0, "运货费"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("运货商", System.Data.OleDb.OleDbType.Integer, 0, "运货商"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_订单ID", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "订单ID", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_到货日期", System.Data.OleDb.OleDbType.DBDate, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "到货日期", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_到货日期1", System.Data.OleDb.OleDbType.DBDate, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "到货日期", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_发货日期", System.Data.OleDb.OleDbType.DBDate, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "发货日期", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_发货日期1", System.Data.OleDb.OleDbType.DBDate, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "发货日期", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_客户ID", System.Data.OleDb.OleDbType.VarWChar, 5, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "客户ID", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_客户ID1", System.Data.OleDb.OleDbType.VarWChar, 5, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "客户ID", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_订购日期", System.Data.OleDb.OleDbType.DBDate, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "订购日期", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_订购日期1", System.Data.OleDb.OleDbType.DBDate, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "订购日期", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主名称", System.Data.OleDb.OleDbType.VarWChar, 40, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主名称", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主名称1", System.Data.OleDb.OleDbType.VarWChar, 40, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主名称", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主国家", System.Data.OleDb.OleDbType.VarWChar, 15, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主国家", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主国家1", System.Data.OleDb.OleDbType.VarWChar, 15, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主国家", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主地区", System.Data.OleDb.OleDbType.VarWChar, 15, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主地区", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主地区1", System.Data.OleDb.OleDbType.VarWChar, 15, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主地区", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主地址", System.Data.OleDb.OleDbType.VarWChar, 60, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主地址", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主地址1", System.Data.OleDb.OleDbType.VarWChar, 60, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主地址", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主城市", System.Data.OleDb.OleDbType.VarWChar, 15, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主城市", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主城市1", System.Data.OleDb.OleDbType.VarWChar, 15, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主城市", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主邮政编码", System.Data.OleDb.OleDbType.VarWChar, 10, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主邮政编码", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主邮政编码1", System.Data.OleDb.OleDbType.VarWChar, 10, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主邮政编码", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_运货商", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "运货商", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_运货商1", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "运货商", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_运货费", System.Data.OleDb.OleDbType.Currency, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "运货费", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_运货费1", System.Data.OleDb.OleDbType.Currency, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "运货费", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_雇员ID", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "雇员ID", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_雇员ID1", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "雇员ID", System.Data.DataRowVersion.Original, null));
//
// oleDbDeleteCommand1
//
this.oleDbDeleteCommand1.CommandText = @"DELETE FROM 订单 WHERE (订单ID = ?) AND (到货日期 = ? OR ? IS NULL AND 到货日期 IS NULL) AND (发货日期 = ? OR ? IS NULL AND 发货日期 IS NULL) AND (客户ID = ? OR ? IS NULL AND 客户ID IS NULL) AND (订购日期 = ? OR ? IS NULL AND 订购日期 IS NULL) AND (货主名称 = ? OR ? IS NULL AND 货主名称 IS NULL) AND (货主国家 = ? OR ? IS NULL AND 货主国家 IS NULL) AND (货主地区 = ? OR ? IS NULL AND 货主地区 IS NULL) AND (货主地址 = ? OR ? IS NULL AND 货主地址 IS NULL) AND (货主城市 = ? OR ? IS NULL AND 货主城市 IS NULL) AND (货主邮政编码 = ? OR ? IS NULL AND 货主邮政编码 IS NULL) AND (运货商 = ? OR ? IS NULL AND 运货商 IS NULL) AND (运货费 = ? OR ? IS NULL AND 运货费 IS NULL) AND (雇员ID = ? OR ? IS NULL AND 雇员ID IS NULL)";
this.oleDbDeleteCommand1.Connection = this.oleDbConnection1;
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_订单ID", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "订单ID", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_到货日期", System.Data.OleDb.OleDbType.DBDate, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "到货日期", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_到货日期1", System.Data.OleDb.OleDbType.DBDate, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "到货日期", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_发货日期", System.Data.OleDb.OleDbType.DBDate, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "发货日期", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_发货日期1", System.Data.OleDb.OleDbType.DBDate, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "发货日期", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_客户ID", System.Data.OleDb.OleDbType.VarWChar, 5, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "客户ID", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_客户ID1", System.Data.OleDb.OleDbType.VarWChar, 5, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "客户ID", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_订购日期", System.Data.OleDb.OleDbType.DBDate, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "订购日期", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_订购日期1", System.Data.OleDb.OleDbType.DBDate, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "订购日期", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主名称", System.Data.OleDb.OleDbType.VarWChar, 40, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主名称", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主名称1", System.Data.OleDb.OleDbType.VarWChar, 40, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主名称", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主国家", System.Data.OleDb.OleDbType.VarWChar, 15, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主国家", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主国家1", System.Data.OleDb.OleDbType.VarWChar, 15, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主国家", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主地区", System.Data.OleDb.OleDbType.VarWChar, 15, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主地区", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主地区1", System.Data.OleDb.OleDbType.VarWChar, 15, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主地区", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主地址", System.Data.OleDb.OleDbType.VarWChar, 60, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主地址", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主地址1", System.Data.OleDb.OleDbType.VarWChar, 60, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主地址", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主城市", System.Data.OleDb.OleDbType.VarWChar, 15, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主城市", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主城市1", System.Data.OleDb.OleDbType.VarWChar, 15, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主城市", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主邮政编码", System.Data.OleDb.OleDbType.VarWChar, 10, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主邮政编码", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_货主邮政编码1", System.Data.OleDb.OleDbType.VarWChar, 10, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "货主邮政编码", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_运货商", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "运货商", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_运货商1", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "运货商", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_运货费", System.Data.OleDb.OleDbType.Currency, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "运货费", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_运货费1", System.Data.OleDb.OleDbType.Currency, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "运货费", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_雇员ID", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "雇员ID", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_雇员ID1", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "雇员ID", System.Data.DataRowVersion.Original, null));
//
// 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";
//
// oleDbDataAdapter1
//
this.oleDbDataAdapter1.DeleteCommand = this.oleDbDeleteCommand1;
this.oleDbDataAdapter1.InsertCommand = this.oleDbInsertCommand1;
this.oleDbDataAdapter1.SelectCommand = this.oleDbSelectCommand1;
this.oleDbDataAdapter1.TableMappings.AddRange(new System.Data.Common.DataTableMapping[] {
new System.Data.Common.DataTableMapping("Table", "订单", new System.Data.Common.DataColumnMapping[] {
new System.Data.Common.DataColumnMapping("到货日期", "到货日期"),
new System.Data.Common.DataColumnMapping("订单ID", "订单ID"),
new System.Data.Common.DataColumnMapping("订购日期", "订购日期"),
new System.Data.Common.DataColumnMapping("发货日期", "发货日期"),
new System.Data.Common.DataColumnMapping("雇员ID", "雇员ID"),
new System.Data.Common.DataColumnMapping("货主城市", "货主城市"),
new System.Data.Common.DataColumnMapping("货主地区", "货主地区"),
new System.Data.Common.DataColumnMapping("货主地址", "货主地址"),
new System.Data.Common.DataColumnMapping("货主国家", "货主国家"),
new System.Data.Common.DataColumnMapping("货主名称", "货主名称"),
new System.Data.Common.DataColumnMapping("货主邮政编码", "货主邮政编码"),
new System.Data.Common.DataColumnMapping("客户ID", "客户ID"),
new System.Data.Common.DataColumnMapping("运货费", "运货费"),
new System.Data.Common.DataColumnMapping("运货商", "运货商")})});
this.oleDbDataAdapter1.UpdateCommand = this.oleDbUpdateCommand1;
//
// dataSet1
//
this.dataSet1.DataSetName = "NewDataSet";
this.dataSet1.Locale = new System.Globalization.CultureInfo("zh-CN");
//
// label3
//
this.label3.Location = new System.Drawing.Point(8, 40);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(392, 16);
this.label3.TabIndex = 5;
this.label3.Text = "label3";
//
// label4
//
this.label4.Location = new System.Drawing.Point(8, 64);
this.label4.Name = "label4";
this.label4.Size = new System.Drawing.Size(392, 16);
this.label4.TabIndex = 6;
this.label4.Text = "label4";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(408, 294);
this.Controls.Add(this.dataGrid1);
this.Controls.Add(this.splitter1);
this.Controls.Add(this.panel1);
this.Name = "Form1";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "演示获取聚合函数的返回值";
this.Load = new System.EventHandler(this.Form1_Load);
this.Closed = new System.EventHandler(this.Form1_Closed);
this.panel1.ResumeLayout(false);
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.dataSet1)).EndInit();
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
this.oleDbDataAdapter1.Fill(this.dataSet1);
this.dataGrid1.DataSource=this.dataSet1;
if(!this.dataGrid1.IsExpanded(0))
this.dataGrid1.Expand(0);
this.oleDbConnection1.Open();
System.Data.OleDb.OleDbCommand MyCommandAmt=new System.Data.OleDb.OleDbCommand("SELECT Count(*) FROM 订单",this.oleDbConnection1);
this.label3.Text="一共查询到：" MyCommandAmt.ExecuteScalar().ToString() "条记录符合要求";
System.Data.OleDb.OleDbCommand MyCommandSum=new System.Data.OleDb.OleDbCommand("SELECT SUM(运货费) FROM 订单",this.oleDbConnection1);
this.label4.Text="订单运费总额为：" MyCommandSum.ExecuteScalar().ToString();
System.Data.OleDb.OleDbCommand MyCommandAvg=new System.Data.OleDb.OleDbCommand("SELECT AVG(运货费) FROM 订单",this.oleDbConnection1);
this.label4.Text =" ,订单平均运费为：" MyCommandAvg.ExecuteScalar().ToString();
this.oleDbConnection1.Close();
}
private void button1_Click(object sender, System.EventArgs e)
{//查询记录
try
{
this.dataSet1.Clear();
string StrSQL=" FROM 订单 WHERE ";
StrSQL =this.comboBox1.Text " LIKE '%";
StrSQL =this.textBox1.Text "%'";
if(this.comboBox1.Text=="所有记录")
StrSQL=" FROM 订单";
this.oleDbDataAdapter1.SelectCommand.CommandText="Select * " StrSQL;
this.oleDbDataAdapter1.SelectCommand.Connection=this.oleDbConnection1;
this.oleDbConnection1.Open();
this.oleDbDataAdapter1.SelectCommand.ExecuteNonQuery();
this.oleDbDataAdapter1.Fill(this.dataSet1);
this.dataGrid1.DataSource=this.dataSet1;
System.Data.OleDb.OleDbCommand MyCommandAmt=new System.Data.OleDb.OleDbCommand("SELECT COUNT(*) " StrSQL,this.oleDbConnection1);
this.label3.Text="一共查询到：" MyCommandAmt.ExecuteScalar().ToString() "条记录符合要求";
System.Data.OleDb.OleDbCommand MyCommandSum=new System.Data.OleDb.OleDbCommand("SELECT SUM(运货费) " StrSQL,this.oleDbConnection1);
this.label4.Text="订单运费总额为：" MyCommandSum.ExecuteScalar().ToString();
System.Data.OleDb.OleDbCommand MyCommandAvg=new System.Data.OleDb.OleDbCommand("SELECT AVG(运货费) " StrSQL,this.oleDbConnection1);
this.label4.Text =" ,订单平均运费为：" MyCommandAvg.ExecuteScalar().ToString();
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);
if(this.oleDbConnection1.State==ConnectionState.Open)
{
this.oleDbConnection1.Close();
}
}
}
private void Form1_Closed(object sender, System.EventArgs e)
{//关闭程序
if(this.oleDbConnection1.State==ConnectionState.Open)
{
this.oleDbConnection1.Close();
}
}
}
}
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