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分享using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Data.SqlClient;
using System.Windows.Forms;
// This form demonstrates using a BindingNavigator to display
// rows from a database query sequentially.
public class Form1 : Form
{
// This is the BindingNavigator that allows the user
// to navigate through the rows in a DataSet.
BindingNavigator customersBindingNavigator = new BindingNavigator();
// This is the BindingSource that provides data for
// the Textbox control.
BindingSource customersBindingSource = new BindingSource();
// This is the TextBox control that displays the CompanyName
// field from the the DataSet.
TextBox companyNameTextBox = new TextBox();
public Form1()
{
// Set up the BindingSource component.
this.customersBindingNavigator.BindingSource = this.customersBindingSource;
this.customersBindingNavigator.Dock = DockStyle.Top;
this.Controls.Add(this.customersBindingNavigator);
// Set up the TextBox control for displaying company names.
this.companyNameTextBox.Dock = DockStyle.Bottom;
this.Controls.Add(this.companyNameTextBox);
// Set up the form.
this.Size = new Size(800, 200);
this.Load += new EventHandler(Form1_Load);
}
void Form1_Load(object sender, EventArgs e)
{
// Open a connection to the database.
// Replace the value of connectString with a valid
// connection string to a Northwind database accessible
// to your system.
string connectString =
"Integrated Security=SSPI;Persist Security Info=False;" +
"Initial Catalog=Northwind;Data Source=localhost";
SqlConnection connection = new SqlConnection();
connection.ConnectionString = connectString;
connection.Open();
// Execute the query.
SqlCommand command = new SqlCommand(
"Select * From Customers", connection);
SqlDataReader reader = command.ExecuteReader(
CommandBehavior.CloseConnection);
// Load the Customers result set into the DataSet.
DataSet ds = new DataSet("Northwind Customers");
ds.Load(
reader,
LoadOption.OverwriteChanges,
new string[] { "Customers" });
// Assign the DataSet as the DataSource for the BindingSource.
this.customersBindingSource.DataSource = ds;
// Bind the CompanyName field to the TextBox control.
this.companyNameTextBox.DataBindings.Add(
new Binding("Text",
this.customersBindingSource,
"CompanyName",
true));
}
}