怎样查询数据库中整张表格的数据，不用拼接的方法

Question

using System.Data.SqlClient;

namespace WindowsFormsApplication7
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

    private void button1_Click(object sender, EventArgs e)
    {
        string Sql;
        string ConnectionString = "Server=(local);Integrated Security=SSPI;Database=student";
        SqlConnection conn = new SqlConnection(ConnectionString);
        conn.Open();
        MessageBox.Show("连接成功！");
        Sql="Select * from  学生";
        try
        {
            SqlDataAdapter adapter = new SqlDataAdapter(Sql, conn);
            DataTable datatable = new DataTable();
            adapter.Fill(datatable);
            MessageBox.Show(datatable.Rows[0][0].ToString());
        }
        catch (SqlException ex)
        {
            throw ex;
        }

    }
}

}

Answer 1

你这条语句不就是所有数据么 Sql="Select * from 学生";
不用拼接啊