我在一个(zhang )类里面写了 public object getcon()
{
SqlConnection conn = new SqlConnection("data source=ZD-LLB;initial catalog=sun;uid=sa;pwd=");
return conn; }在主界面写了
DataTable dt = new DataTable();
classes.zhang mm = new classes.zhang(); mm.and(); SqlDataAdapter ada = new SqlDataAdapter("select 姓名,年龄,学号 from amd", conn);
conn.Open();
ada.Fill(dt); dataGridView1.DataSource = dt;
为什么提示
当前上下文中不存在名称“conn” ????????
{
SqlConnection conn = new SqlConnection("data source=ZD-LLB;initial catalog=sun;uid=sa;pwd=");
return conn; }在主界面写了
DataTable dt = new DataTable();
classes.zhang mm = new classes.zhang(); mm.and(); SqlDataAdapter ada = new SqlDataAdapter("select 姓名,年龄,学号 from amd", conn);
conn.Open();
ada.Fill(dt); dataGridView1.DataSource = dt;
为什么提示
当前上下文中不存在名称“conn” ????????
conn.Open();
sqlConnection conn=(sqlConnection)(mm.getConn());
是否OPEN无所谓,数据适配对象会自动打开连接的!