通过

如何：将数据绑定到 Windows 窗体 DataGridView 控件

  • 项目

DataGridView 控件支持标准 Windows 窗体数据绑定模型，因此可绑定到各种数据源。 但在多数情况下，都将绑定到一个 BindingSource 组件，由该组件来管理与数据源交互的详细信息。 BindingSource 组件可表示任何 Windows 窗体数据源，并在选择或修改数据位置时提供很大的灵活性。 有关 DataGridView 控件支持的数据源的更多信息，请参见 DataGridView 控件概述（Windows 窗体）。

Visual Studio 中对此任务提供了广泛的支持。 有关更多信息，请参见 如何：使用设计器将数据绑定到 Windows 窗体的 DataGridView 控件 和 如何：使用设计器将数据绑定到 Windows 窗体的 DataGridView 控件 和 如何：使用设计器将数据绑定到 Windows 窗体的 DataGridView 控件 和 如何：使用设计器将数据绑定到 Windows 窗体的 DataGridView 控件.

过程

将 DataGridView 控件连接到数据

  1. 实现一个用于处理数据库数据检索的详细信息的方法。 下面的代码示例实现一个 GetData 方法，该方法对一个 SqlDataAdapter 组件进行初始化，并使用该组件填充 DataTable。 然后，将 DataTable 绑定到 BindingSource 组件。 请确保将 connectionString 变量的值设置为与数据库相应的值。 您将需要访问安装了 Northwind SQL Server 示例数据库的服务器。

    Private Sub GetData(ByVal selectCommand As String)

    Try
        ' Specify a connection string. Replace the given value with a 
        ' valid connection string for a Northwind SQL Server sample
        ' database accessible to your system.
        Dim connectionString As String = _
            "Integrated Security=SSPI;Persist Security Info=False;" + _
            "Initial Catalog=Northwind;Data Source=localhost"

        ' Create a new data adapter based on the specified query.
        Me.dataAdapter = New SqlDataAdapter(selectCommand, connectionString)

        ' Create a command builder to generate SQL update, insert, and
        ' delete commands based on selectCommand. These are used to
        ' update the database.
        Dim commandBuilder As New SqlCommandBuilder(Me.dataAdapter)

        ' Populate a new data table and bind it to the BindingSource.
        Dim table As New DataTable()
        table.Locale = System.Globalization.CultureInfo.InvariantCulture
        Me.dataAdapter.Fill(table)
        Me.bindingSource1.DataSource = table

        ' Resize the DataGridView columns to fit the newly loaded content.
        Me.dataGridView1.AutoResizeColumns( _
            DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader)
    Catch ex As SqlException
        MessageBox.Show("To run this example, replace the value of the " + _
            "connectionString variable with a connection string that is " + _
            "valid for your system.")
    End Try

End Sub

    private void GetData(string selectCommand)
{
    try
    {
        // Specify a connection string. Replace the given value with a 
        // valid connection string for a Northwind SQL Server sample
        // database accessible to your system.
        String connectionString =
            "Integrated Security=SSPI;Persist Security Info=False;" +
            "Initial Catalog=Northwind;Data Source=localhost";

        // Create a new data adapter based on the specified query.
        dataAdapter = new SqlDataAdapter(selectCommand, connectionString);

        // Create a command builder to generate SQL update, insert, and
        // delete commands based on selectCommand. These are used to
        // update the database.
        SqlCommandBuilder commandBuilder = new SqlCommandBuilder(dataAdapter);

        // Populate a new data table and bind it to the BindingSource.
        DataTable table = new DataTable();
        table.Locale = System.Globalization.CultureInfo.InvariantCulture;
        dataAdapter.Fill(table);
        bindingSource1.DataSource = table;

        // Resize the DataGridView columns to fit the newly loaded content.
        dataGridView1.AutoResizeColumns( 
            DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader);
    }
    catch (SqlException)
    {
        MessageBox.Show("To run this example, replace the value of the " +
            "connectionString variable with a connection string that is " +
            "valid for your system.");
    }
}

    private:
    void GetData(String^ selectCommand)
    {
        try
        {
            // Specify a connection string. Replace the given value with a 
            // valid connection string for a Northwind SQL Server sample
            // database accessible to your system.
            String^ connectionString = 
                "Integrated Security=SSPI;Persist Security Info=False;" +
                "Initial Catalog=Northwind;Data Source=localhost";

            // Create a new data adapter based on the specified query.
            dataAdapter = gcnew SqlDataAdapter(selectCommand, connectionString);

            // Create a command builder to generate SQL update, insert, and
            // delete commands based on selectCommand. These are used to
            // update the database.
            gcnew SqlCommandBuilder(dataAdapter);

            // Populate a new data table and bind it to the BindingSource.
            DataTable^ table = gcnew DataTable();
            dataAdapter->Fill(table);
            bindingSource1->DataSource = table;

            // Resize the DataGridView columns to fit the newly loaded content.
            dataGridView1->AutoResizeColumns( 
                DataGridViewAutoSizeColumnsMode::AllCellsExceptHeader);
        }
        catch (SqlException^)
        {
            MessageBox::Show("To run this example, replace the value of the " +
                "connectionString variable with a connection string that is " +
                "valid for your system.");
        }
    }

  2. 在窗体的 Load 事件处理程序中，将 DataGridView 控件绑定到 BindingSource 组件，并调用 GetData 方法从数据库中检索数据。

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) _
    Handles Me.Load

    ' Bind the DataGridView to the BindingSource
    ' and load the data from the database.
    Me.dataGridView1.DataSource = Me.bindingSource1
    GetData("select * from Customers")

End Sub

    private void Form1_Load(object sender, System.EventArgs e)
{
    // Bind the DataGridView to the BindingSource
    // and load the data from the database.
    dataGridView1.DataSource = bindingSource1;
    GetData("select * from Customers");
}

    void Form1_Load(Object^ /*sender*/, System::EventArgs^ /*e*/)
{
    // Bind the DataGridView to the BindingSource
    // and load the data from the database.
    dataGridView1->DataSource = bindingSource1;
    GetData("select * from Customers");
}

示例

下面的完整代码示例提供的按钮用于从数据库重新加载数据和向数据库提交更改。

Imports System
Imports System.Data
Imports System.Data.SqlClient
Imports System.Windows.Forms

Public Class Form1
    Inherits System.Windows.Forms.Form

    Private dataGridView1 As New DataGridView()
    Private bindingSource1 As New BindingSource()
    Private dataAdapter As New SqlDataAdapter()
    Private WithEvents reloadButton As New Button()
    Private WithEvents submitButton As New Button()

    <STAThreadAttribute()> _
    Public Shared Sub Main()
        Application.Run(New Form1())
    End Sub

    ' Initialize the form.
    Public Sub New()

        Me.dataGridView1.Dock = DockStyle.Fill

        Me.reloadButton.Text = "reload"
        Me.submitButton.Text = "submit"

        Dim panel As New FlowLayoutPanel()
        panel.Dock = DockStyle.Top
        panel.AutoSize = True
        panel.Controls.AddRange(New Control() {Me.reloadButton, Me.submitButton})

        Me.Controls.AddRange(New Control() {Me.dataGridView1, panel})
        Me.Text = "DataGridView databinding and updating demo"

    End Sub

    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) _
        Handles Me.Load

        ' Bind the DataGridView to the BindingSource
        ' and load the data from the database.
        Me.dataGridView1.DataSource = Me.bindingSource1
        GetData("select * from Customers")

    End Sub

    Private Sub reloadButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) _
        Handles reloadButton.Click

        ' Reload the data from the database.
        GetData(Me.dataAdapter.SelectCommand.CommandText)

    End Sub

    Private Sub submitButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) _
        Handles submitButton.Click

        ' Update the database with the user's changes.
        Me.dataAdapter.Update(CType(Me.bindingSource1.DataSource, DataTable))

    End Sub

    Private Sub GetData(ByVal selectCommand As String)

        Try
            ' Specify a connection string. Replace the given value with a 
            ' valid connection string for a Northwind SQL Server sample
            ' database accessible to your system.
            Dim connectionString As String = _
                "Integrated Security=SSPI;Persist Security Info=False;" + _
                "Initial Catalog=Northwind;Data Source=localhost"

            ' Create a new data adapter based on the specified query.
            Me.dataAdapter = New SqlDataAdapter(selectCommand, connectionString)

            ' Create a command builder to generate SQL update, insert, and
            ' delete commands based on selectCommand. These are used to
            ' update the database.
            Dim commandBuilder As New SqlCommandBuilder(Me.dataAdapter)

            ' Populate a new data table and bind it to the BindingSource.
            Dim table As New DataTable()
            table.Locale = System.Globalization.CultureInfo.InvariantCulture
            Me.dataAdapter.Fill(table)
            Me.bindingSource1.DataSource = table

            ' Resize the DataGridView columns to fit the newly loaded content.
            Me.dataGridView1.AutoResizeColumns( _
                DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader)
        Catch ex As SqlException
            MessageBox.Show("To run this example, replace the value of the " + _
                "connectionString variable with a connection string that is " + _
                "valid for your system.")
        End Try

    End Sub

End Class

using System;
using System.Data;
using System.Data.SqlClient;
using System.Windows.Forms;

public class Form1 : System.Windows.Forms.Form
{
    private DataGridView dataGridView1 = new DataGridView();
    private BindingSource bindingSource1 = new BindingSource();
    private SqlDataAdapter dataAdapter = new SqlDataAdapter();
    private Button reloadButton = new Button();
    private Button submitButton = new Button();

    [STAThreadAttribute()]
    public static void Main()
    {
        Application.Run(new Form1());
    }

    // Initialize the form.
    public Form1()
    {
        dataGridView1.Dock = DockStyle.Fill;

        reloadButton.Text = "reload";
        submitButton.Text = "submit";
        reloadButton.Click += new System.EventHandler(reloadButton_Click);
        submitButton.Click += new System.EventHandler(submitButton_Click);

        FlowLayoutPanel panel = new FlowLayoutPanel();
        panel.Dock = DockStyle.Top;
        panel.AutoSize = true;
        panel.Controls.AddRange(new Control[] { reloadButton, submitButton });

        this.Controls.AddRange(new Control[] { dataGridView1, panel });
        this.Load += new System.EventHandler(Form1_Load);
        this.Text = "DataGridView databinding and updating demo";
    }

    private void Form1_Load(object sender, System.EventArgs e)
    {
        // Bind the DataGridView to the BindingSource
        // and load the data from the database.
        dataGridView1.DataSource = bindingSource1;
        GetData("select * from Customers");
    }

    private void reloadButton_Click(object sender, System.EventArgs e)
    {
        // Reload the data from the database.
        GetData(dataAdapter.SelectCommand.CommandText);
    }

    private void submitButton_Click(object sender, System.EventArgs e)
    {
        // Update the database with the user's changes.
        dataAdapter.Update((DataTable)bindingSource1.DataSource);
    }

    private void GetData(string selectCommand)
    {
        try
        {
            // Specify a connection string. Replace the given value with a 
            // valid connection string for a Northwind SQL Server sample
            // database accessible to your system.
            String connectionString =
                "Integrated Security=SSPI;Persist Security Info=False;" +
                "Initial Catalog=Northwind;Data Source=localhost";

            // Create a new data adapter based on the specified query.
            dataAdapter = new SqlDataAdapter(selectCommand, connectionString);

            // Create a command builder to generate SQL update, insert, and
            // delete commands based on selectCommand. These are used to
            // update the database.
            SqlCommandBuilder commandBuilder = new SqlCommandBuilder(dataAdapter);

            // Populate a new data table and bind it to the BindingSource.
            DataTable table = new DataTable();
            table.Locale = System.Globalization.CultureInfo.InvariantCulture;
            dataAdapter.Fill(table);
            bindingSource1.DataSource = table;

            // Resize the DataGridView columns to fit the newly loaded content.
            dataGridView1.AutoResizeColumns( 
                DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader);
        }
        catch (SqlException)
        {
            MessageBox.Show("To run this example, replace the value of the " +
                "connectionString variable with a connection string that is " +
                "valid for your system.");
        }
    }

}

#using <System.Data.dll>
#using <System.Transactions.dll>
#using <System.EnterpriseServices.dll>
#using <System.Xml.dll>
#using <System.Drawing.dll>
#using <System.dll>
#using <System.Windows.Forms.dll>

using namespace System;
using namespace System::Data;
using namespace System::Data::SqlClient;
using namespace System::Windows::Forms;

public ref class Form1 : public System::Windows::Forms::Form
{
private:
    DataGridView^ dataGridView1;
private:
    BindingSource^ bindingSource1;
private:
    SqlDataAdapter^ dataAdapter;
private:
    Button^ reloadButton;
private:
    Button^ submitButton;

public:
    static void Main()
    {
        Application::Run(gcnew Form1());
    }

    // Initialize the form.
public:
    Form1()
    {
        dataGridView1 = gcnew DataGridView();
        bindingSource1 = gcnew BindingSource();
        dataAdapter = gcnew SqlDataAdapter();
        reloadButton = gcnew Button();
        submitButton = gcnew Button();

        dataGridView1->Dock = DockStyle::Fill;

        reloadButton->Text = "reload";
        submitButton->Text = "submit";
        reloadButton->Click += gcnew System::EventHandler(this,&Form1::reloadButton_Click);
        submitButton->Click += gcnew System::EventHandler(this,&Form1::submitButton_Click);

        FlowLayoutPanel^ panel = gcnew FlowLayoutPanel();
        panel->Dock = DockStyle::Top;
        panel->AutoSize = true;
        panel->Controls->AddRange(gcnew array<Control^> { reloadButton, submitButton });

        this->Controls->AddRange(gcnew array<Control^> { dataGridView1, panel });
        this->Load += gcnew System::EventHandler(this,&Form1::Form1_Load);
    }

    void Form1_Load(Object^ /*sender*/, System::EventArgs^ /*e*/)
    {
        // Bind the DataGridView to the BindingSource
        // and load the data from the database.
        dataGridView1->DataSource = bindingSource1;
        GetData("select * from Customers");
    }

    void reloadButton_Click(Object^ /*sender*/, System::EventArgs^ /*e*/)
    {
        // Reload the data from the database.
        GetData(dataAdapter->SelectCommand->CommandText);
    }

    void submitButton_Click(Object^ /*sender*/, System::EventArgs^ /*e*/)
    {
        // Update the database with the user's changes.
        dataAdapter->Update((DataTable^)bindingSource1->DataSource);
    }

private:
    void GetData(String^ selectCommand)
    {
        try
        {
            // Specify a connection string. Replace the given value with a 
            // valid connection string for a Northwind SQL Server sample
            // database accessible to your system.
            String^ connectionString = 
                "Integrated Security=SSPI;Persist Security Info=False;" +
                "Initial Catalog=Northwind;Data Source=localhost";

            // Create a new data adapter based on the specified query.
            dataAdapter = gcnew SqlDataAdapter(selectCommand, connectionString);

            // Create a command builder to generate SQL update, insert, and
            // delete commands based on selectCommand. These are used to
            // update the database.
            gcnew SqlCommandBuilder(dataAdapter);

            // Populate a new data table and bind it to the BindingSource.
            DataTable^ table = gcnew DataTable();
            dataAdapter->Fill(table);
            bindingSource1->DataSource = table;

            // Resize the DataGridView columns to fit the newly loaded content.
            dataGridView1->AutoResizeColumns( 
                DataGridViewAutoSizeColumnsMode::AllCellsExceptHeader);
        }
        catch (SqlException^)
        {
            MessageBox::Show("To run this example, replace the value of the " +
                "connectionString variable with a connection string that is " +
                "valid for your system.");
        }
    }
};

编译代码

此示例需要：

  • 对 System、System.Windows.Forms、System.Data 和 System.XML 程序集的引用。

有关从 Visual Basic 或 Visual C# 的命令行生成此示例的信息，请参见从命令行生成 (Visual Basic) 或在命令行上使用 csc.exe 生成。 也可以通过将代码粘贴到新项目，在 Visual Studio 中生成此示例。 有关更多信息，请参见 如何：使用 Visual Studio 编译和运行完整的 Windows 窗体代码示例 和 如何：使用 Visual Studio 编译和运行完整的 Windows 窗体代码示例 和 如何：使用 Visual Studio 编译和运行完整的 Windows 窗体代码示例 和 如何：使用 Visual Studio 编译和运行完整的 Windows 窗体代码示例 和 如何：使用 Visual Studio 编译和运行完整的 Windows 窗体代码示例.

安全性

将敏感信息（如密码）存储在连接字符串中可能会影响您的应用程序的安全性。 若要控制对数据库的访问，一种较为安全的方法是使用 Windows 身份验证（也称为集成安全性）。 有关更多信息，请参见保护连接信息 (ADO.NET)。

请参见

参考

DataGridView

DataGridView.DataSource

BindingSource

概念

保护连接信息 (ADO.NET)

其他资源

在 Windows 窗体 DataGridView 控件中显示数据