如何在访问数据库中显示datagridview中的数据

Question

我在此处显示访问数据库中datagridview中的数据时使用的代码。我有不同的行，但只显示数据库中的最后一行数据。我不知道我的代码中有什么问题。

dataGridView1.Columns.Add("UserID", "UserID"); 
    dataGridView1.Columns.Add("FirstName", "FirstName"); 
    dataGridView1.Columns.Add("MI", "MI"); 
    dataGridView1.Columns.Add("LastName", "LastName"); 
    dataGridView1.Columns.Add("Birthdate", "Birthdate"); 
    dataGridView1.Columns.Add("Address", "Address"); 
    dataGridView1.Columns.Add("UserName", "UserName"); 
    dataGridView1.Columns.Add("UserPassword", "UserPassword"); 
    dataGridView1.Columns.Add("Rights", "Rights"); 


    OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=\\SISC-STRONGHOLD\MIS!\wilbert.beltran\SEEDBucksDbase.accdb"); 
    conn.Open(); 
    OleDbCommand cmd = new OleDbCommand(); 
    cmd.Connection = conn; 
    cmd.CommandText = "SELECT * From TableAcct"; 
    OleDbDataReader reader = cmd.ExecuteReader(); 
    while (reader.Read()) 
    { 
     dataGridView1.Rows.Add(); 

     dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["UserID"].Value = reader[0].ToString(); 
     dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["FirstName"].Value = reader[1].ToString(); 
     dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["MI"].Value = reader[2].ToString(); 
     dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["LastName"].Value = reader[3].ToString(); 
     dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["Birthdate"].Value = reader[4].ToString(); 
     dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["Address"].Value = reader[5].ToString(); 
     dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["UserName"].Value = reader[7].ToString(); 
     dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["UserPassword"].Value = reader[8].ToString(); 
     dataGridView1.Rows[dataGridView1.Rows.Count - 1].Cells["Rights"].Value = reader[9].ToString(); 
    } 
    conn.Close(); 
} 

Answer 1

可以使用OleDbDataAdapter直接绑定dataGridView1。确保datagridview中列的名称与查询返回的字段名称匹配，以便它包含空白列并为每个字段创建另一列。

string connStr = @"Provider=Microsoft.ACE.OLEDB.12.0; 
     Data Source=\\SISC-STRONGHOLD\MIS!\wilbert.beltran\SEEDBucksDbase.accdb"; 
string query = "SELECT * From TableAcct"; 
using(OleDbConnection conn = new OleDbConnection(connStr)) 
{ 
    using(OleDbDataAdapter adapter = new OleDbDataAdapter(query, conn)) 
    { 
     DataSet ds = new DataSet(); 
     adapter.Fill(ds); 
     DataGridView1.DataSource= ds.Tables[0]; 
    } 
} 

Answer 2

请使用此代码，以显示你的数据对datagridview的在C＃.NET

OleDBConnection con=new  OleDBConnection("Copy your database database path and paste it"); 
    con.open(); 
    Dataset ds=new Dataset(); 
     OleDBDataAdapter sdr=new  OleDBDataAdapter("select * from table_name",con); 
    sdr.Fill(ds); 
    datagridview1.Datasource=ds.tables[0]; 
    con.close(); 

Answer 3

public partial class WebForm1 : System.Web.UI.Page 
{ 
    public String name,type,rvw; 


    public void Page_Load(object sender, EventArgs e) 
    { 
     SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=C:\Users\Uz!\Documents\Data_Ware.mdf;Integrated Security=True;Connect Timeout=30"); 
     SqlDataAdapter sda = new SqlDataAdapter("Select * From CoffeeDB ", con); 
     DataTable dt = new DataTable(); 
     sda.Fill(dt); 

     GridView.DataSource = dt; 
    } 
}