Question

我正在尝试在DataGridView中显示我的一个数据库表。我使用EF Code First方法创建了数据库。这是我的DB类：

public class BloodDonor
{
    public int BloodDonorId { get; set; }
    public String FirstName { get; set; }
    public String LastName { get; set; }
    public DateTime DateofBirth { get; set; }
    public DateTime DateOfRegistration { get; set; }
    public BloodTypes BloodType { get; set; }

    public virtual List<BloodDonation> BloodDonations { get; set; }


}

public class BloodDonation
{
    public int BloodDonationId { get; set; }
    public DateTime DateOfDonation { get; set; }

    public virtual BloodDonor bloodDonor { get; set; }
}

public class BloodBankContext: DbContext
{
    public BloodBankContext() : base("BloodBankDatabase1") 
    {
        Database.SetInitializer<BloodBankContext>(new DropCreateDatabaseAlways<BloodBankContext>());
    }
    public DbSet<BloodDonor> BloodDonors { get; set; }
    public DbSet<BloodDonation> BloodDonations { get; set; }

}

这是我的主要表格：

public partial class BloodBankManager : Form
{
    public static BloodBankContext context;



    public BloodBankManager()
    {
        InitializeComponent();
        context = new BloodBankContext();



        ExampleDataFiller exampleDataFiller = new ExampleDataFiller(context);
        var query = from b in context.BloodDonors
                    select b;

        foreach (var donor in query)
        {
            MessageBox.Show(donor.BloodDonorId + " " + donor.FirstName + " " + donor.LastName + " " + donor.DateofBirth.ToShortDateString() + " " + donor.BloodType);
        }

    }

    private void Form1_Load(object sender, EventArgs e)
    {


    }

    private void newBloodDonorButton_Click(object sender, EventArgs e)
    {
        NewBloodDonorForm newBloodDonorForm = new NewBloodDonorForm();
        newBloodDonorForm.bloodBankManager = this;
        newBloodDonorForm.Show();
    }


}

我的数据库似乎工作正常，但我不知道如何显示

context.BloodDonors

DataGridView中的

。我尝试在DataGridViewProperty中使用DataSource向导，但在我第一次运行应用程序后，DataGridView在更改BloodDonors表后不会更新。有关将所需表附加到DataGridView的最简单方法的想法吗？

Answer 1

您需要绑定到DataGridView.DataSource属性。

在这里阅读更多内容 http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.datasource(v=vs.110).aspx

这是一个代码示例

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

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string connectionString = "Data Source=.;Initial Catalog=pubs;Integrated Security=True";
            string sql = "SELECT * FROM Authors";
            SqlConnection connection = new SqlConnection(connectionString);
            SqlDataAdapter dataadapter = new SqlDataAdapter(sql, connection);
            DataSet ds = new DataSet();
            connection.Open();
            dataadapter.Fill(ds, "Authors_table");
            connection.Close();
            dataGridView1.DataSource = ds;
            dataGridView1.DataMember = "Authors_table";
        }
    }
}

以下是另一个链接，其中包含有关binding

的更多信息

如何在DataGridView中显示使用EF Code First创建的数据库？

1 个答案: