实例介绍
【实例简介】对access数据库进行参数化查询
【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 DataBase2
{
/// <summary>
/// 参数化查询。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Data.OleDb.OleDbDataAdapter oleDbDataAdapter1;
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 DataBase2.DataSet1 dataSet11;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.GroupBox groupBox1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.TextBox textBox_Addr;
private System.Windows.Forms.TextBox textBox_Email;
private System.Windows.Forms.TextBox textBox_Name;
/// <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 Form Designer generated code
/// <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.oleDbDataAdapter1 = new System.Data.OleDb.OleDbDataAdapter();
this.oleDbDeleteCommand1 = new System.Data.OleDb.OleDbCommand();
this.oleDbConnection1 = new System.Data.OleDb.OleDbConnection();
this.oleDbInsertCommand1 = new System.Data.OleDb.OleDbCommand();
this.oleDbSelectCommand1 = new System.Data.OleDb.OleDbCommand();
this.oleDbUpdateCommand1 = new System.Data.OleDb.OleDbCommand();
this.dataSet11 = new DataBase2.DataSet1();
this.label1 = new System.Windows.Forms.Label();
this.button1 = new System.Windows.Forms.Button();
this.groupBox1 = new System.Windows.Forms.GroupBox();
this.textBox_Email = new System.Windows.Forms.TextBox();
this.textBox_Addr = new System.Windows.Forms.TextBox();
this.label3 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.textBox_Name = new System.Windows.Forms.TextBox();
((System.ComponentModel.ISupportInitialize)(this.dataSet11)).BeginInit();
this.groupBox1.SuspendLayout();
this.SuspendLayout();
//
// 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", "user", new System.Data.Common.DataColumnMapping[] {
new System.Data.Common.DataColumnMapping("username", "username"),
new System.Data.Common.DataColumnMapping("address", "address"),
new System.Data.Common.DataColumnMapping("Email", "Email")})});
this.oleDbDataAdapter1.UpdateCommand = this.oleDbUpdateCommand1;
//
// oleDbDeleteCommand1
//
this.oleDbDeleteCommand1.CommandText = "DELETE FROM [user] WHERE (编号 = ?) AND (Email = ? OR ? IS NULL AND Email IS NULL) "
"AND (address = ? OR ? IS NULL AND address IS NULL) AND (username = ?)";
this.oleDbDeleteCommand1.Connection = this.oleDbConnection1;
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_编号", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(10)), ((System.Byte)(0)), "编号", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_Email", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "Email", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_Email1", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "Email", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_address", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "address", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_address1", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "address", System.Data.DataRowVersion.Original, null));
this.oleDbDeleteCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_username", System.Data.OleDb.OleDbType.VarWChar, 20, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "username", System.Data.DataRowVersion.Original, null));
//
// oleDbConnection1
//
//this.oleDbConnection1.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Password="""";User ID=Admin;Data Source=E:\Project\DataBase2\bin\Debug\test.mdb;Mode=Share Deny None;Extended Properties="""";Jet OLEDB:System database="""";Jet OLEDB:Registry Path="""";Jet OLEDB:Database Password="""";Jet OLEDB:Engine Type=5;Jet OLEDB:Database Locking Mode=1;Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Global Bulk Transactions=1;Jet OLEDB:New Database Password="""";Jet OLEDB:Create System Database=False;Jet OLEDB:Encrypt Database=False;Jet OLEDB:Don't Copy Locale on Compact=False;Jet OLEDB:Compact Without Replica Repair=False;Jet OLEDB:SFP=False";
this.oleDbConnection1.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Password="""";User ID=Admin;Data Source=" System.Windows.Forms.Application.StartupPath @"\test.mdb;Mode=Share Deny None;Extended Properties="""";Jet OLEDB:System database="""";Jet OLEDB:Registry Path="""";Jet OLEDB:Database Password="""";Jet OLEDB:Engine Type=5;Jet OLEDB:Database Locking Mode=1;Jet OLEDB:Global Partial Bulk Ops=2;Jet OLEDB:Global Bulk Transactions=1;Jet OLEDB:New Database Password="""";Jet OLEDB:Create System Database=False;Jet OLEDB:Encrypt Database=False;Jet OLEDB:Don't Copy Locale on Compact=False;Jet OLEDB:Compact Without Replica Repair=False;Jet OLEDB:SFP=False";
//
// oleDbInsertCommand1
//
this.oleDbInsertCommand1.CommandText = "INSERT INTO [user] (username, address, Email, 编号) VALUES (?, ?, ?, ?)";
this.oleDbInsertCommand1.Connection = this.oleDbConnection1;
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("username", System.Data.OleDb.OleDbType.VarWChar, 20, "username"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("address", System.Data.OleDb.OleDbType.VarWChar, 50, "address"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Email", System.Data.OleDb.OleDbType.VarWChar, 50, "Email"));
this.oleDbInsertCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("编号", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(10)), ((System.Byte)(0)), "编号", System.Data.DataRowVersion.Current, null));
//
// oleDbSelectCommand1
//
this.oleDbSelectCommand1.CommandText = "SELECT username, address, Email, 编号 FROM [user] WHERE (username = ?)";
this.oleDbSelectCommand1.Connection = this.oleDbConnection1;
this.oleDbSelectCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("username", System.Data.OleDb.OleDbType.VarWChar, 20, "username"));
//
// oleDbUpdateCommand1
//
this.oleDbUpdateCommand1.CommandText = "UPDATE [user] SET username = ?, address = ?, Email = ?, 编号 = ? WHERE (编号 = ?) AND"
" (Email = ? OR ? IS NULL AND Email IS NULL) AND (address = ? OR ? IS NULL AND ad"
"dress IS NULL) AND (username = ?)";
this.oleDbUpdateCommand1.Connection = this.oleDbConnection1;
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("username", System.Data.OleDb.OleDbType.VarWChar, 20, "username"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("address", System.Data.OleDb.OleDbType.VarWChar, 50, "address"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Email", System.Data.OleDb.OleDbType.VarWChar, 50, "Email"));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("编号", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(10)), ((System.Byte)(0)), "编号", System.Data.DataRowVersion.Current, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_编号", System.Data.OleDb.OleDbType.Integer, 0, System.Data.ParameterDirection.Input, false, ((System.Byte)(10)), ((System.Byte)(0)), "编号", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_Email", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "Email", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_Email1", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "Email", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_address", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "address", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_address1", System.Data.OleDb.OleDbType.VarWChar, 50, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "address", System.Data.DataRowVersion.Original, null));
this.oleDbUpdateCommand1.Parameters.Add(new System.Data.OleDb.OleDbParameter("Original_username", System.Data.OleDb.OleDbType.VarWChar, 20, System.Data.ParameterDirection.Input, false, ((System.Byte)(0)), ((System.Byte)(0)), "username", System.Data.DataRowVersion.Original, null));
//
// dataSet11
//
this.dataSet11.DataSetName = "DataSet1";
this.dataSet11.Locale = new System.Globalization.CultureInfo("zh-CN");
this.dataSet11.Namespace = "http://www.tempuri.org/DataSet1.xsd";
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(16, 16);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(67, 18);
this.label1.TabIndex = 0;
this.label1.Text = "用户名：";
//
// button1
//
this.button1.Location = new System.Drawing.Point(264, 16);
this.button1.Name = "button1";
this.button1.TabIndex = 2;
this.button1.Text = "查询";
this.button1.TextAlign = System.Drawing.ContentAlignment.TopCenter;
this.button1.Click = new System.EventHandler(this.button1_Click);
//
// groupBox1
//
this.groupBox1.Controls.AddRange(new System.Windows.Forms.Control[] {
this.textBox_Email,
this.textBox_Addr,
this.label3,
this.label2});
this.groupBox1.Location = new System.Drawing.Point(8, 56);
this.groupBox1.Name = "groupBox1";
this.groupBox1.Size = new System.Drawing.Size(336, 200);
this.groupBox1.TabIndex = 3;
this.groupBox1.TabStop = false;
this.groupBox1.Text = " 查询结果 ";
//
// textBox_Email
//
this.textBox_Email.DataBindings.Add(new System.Windows.Forms.Binding("Text", this.dataSet11, "user.Email"));
this.textBox_Email.Location = new System.Drawing.Point(56, 152);
this.textBox_Email.Name = "textBox_Email";
this.textBox_Email.Size = new System.Drawing.Size(256, 25);
this.textBox_Email.TabIndex = 3;
this.textBox_Email.Text = "";
//
// textBox_Addr
//
this.textBox_Addr.DataBindings.Add(new System.Windows.Forms.Binding("Text", this.dataSet11, "user.address"));
this.textBox_Addr.Location = new System.Drawing.Point(56, 72);
this.textBox_Addr.Name = "textBox_Addr";
this.textBox_Addr.Size = new System.Drawing.Size(256, 25);
this.textBox_Addr.TabIndex = 2;
this.textBox_Addr.Text = "";
//
// label3
//
this.label3.AutoSize = true;
this.label3.Location = new System.Drawing.Point(16, 120);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(60, 18);
this.label3.TabIndex = 1;
this.label3.Text = "Email：";
//
// label2
//
this.label2.AutoSize = true;
this.label2.Location = new System.Drawing.Point(16, 40);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(52, 18);
this.label2.TabIndex = 0;
this.label2.Text = "地址：";
//
// textBox_Name
//
this.textBox_Name.Location = new System.Drawing.Point(88, 16);
this.textBox_Name.Name = "textBox_Name";
this.textBox_Name.Size = new System.Drawing.Size(144, 25);
this.textBox_Name.TabIndex = 4;
this.textBox_Name.Text = "";
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(8, 18);
this.ClientSize = new System.Drawing.Size(354, 266);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.textBox_Name,
this.groupBox1,
this.button1,
this.label1});
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
this.MaximizeBox = false;
this.Name = "Form1";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "参数化查询";
((System.ComponentModel.ISupportInitialize)(this.dataSet11)).EndInit();
this.groupBox1.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 button1_Click(object sender, System.EventArgs e)
{
if (textBox_Name.Text.Length != 0)
{
oleDbDataAdapter1.SelectCommand.Parameters["username"].Value = textBox_Name.Text;
dataSet11.Clear();
oleDbDataAdapter1.Fill(dataSet11);
}
}
}
}
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