Console.Write("请输入您想改的内容:");

string ucode = Console.ReadLine();

string sql = "server=.;database=Data0504;user=sa;pwd=123";

SqlConnection conn = new SqlConnection(sql);

SqlCommand cmd = conn.CreateCommand();

cmd.CommandText = "update Users set NickName =‘" + ucode + "‘ where NickName=‘李四‘";

conn.Open();

int count = cmd.ExecuteNonQuery();

conn.Close();

if (count > 0)
{
Console.WriteLine("更改成功");
}
else
{
Console.WriteLine("更改失败！");
}
Console.ReadLine();

ADO.NET修改数据