如何在Access数据库中显示datagridview中的数据

Question

我在下面的代码中显示了来自access数据库的datagridview中的数据.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

你可以直接dataGridView1使用绑定OleDbDataAdapter.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];
    }
}