how to further use retrive values from database

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My Question may be very simple but i am not able to solve this problem lets say i am retrieving user details in a query i.e

C#

SqlCommand comand = new SqlCommand("Select Userid,UserName,Password FROM Users WHERE UserName=@Uname and Password = @Pass", con);
        comand.Parameters.AddWithValue("@Uname", this.txtUsername.Text);
        comand.Parameters.AddWithValue("@pass", this.txtPassword.Text);
  con.Open();
       SqlDataAdapter adp = new  SqlDataAdapter(comand);
        DataTable t = new DataTable();
        adp.Fill(t);

I want to get Userid separately to further use in a Query or i may store USerid of the user who has loged in into Session How i can do this??

Posted 16-Feb-14 3:02am

irfanniazi

Updated 16-Feb-14 3:54am

Krunal Rohit

v2

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OriginalGriff · Answer 1 · 2014-02-16T03:27:00

Store it in the session, it's pretty simple:

C#

Session["UserId"] = myUserId;

And then

C#

if (Session["UserId"] == null)
   {
   ... redirect to login page
   }
else
   {
   string userId = (string) Session["UserId"];
   ...
   }

But please, don't do that! Never store passwords in clear text - it is a major security risk. There is some information on how to do it here: Password Storage: How to do it.[^]

Krunal Rohit · Answer 2 · 2014-02-16T03:56:00

C#

SqlCommand comand = new SqlCommand("Select Userid,UserName,Password FROM Users WHERE UserName=@Uname and Password = @Pass", con);
        comand.Parameters.AddWithValue("@Uname", this.txtUsername.Text);
        comand.Parameters.AddWithValue("@pass", this.txtPassword.Text);
  con.Open();
       SqlDataAdapter adp = new  SqlDataAdapter(comand);
        DataTable t = new DataTable();
        adp.Fill(t);

string userId;
foreach(DataRow dr in t.Rows)
{
userId = dr["Userid"].ToString();
}

and then store it in the session, i.e

C#

Session["userId"] = userId;

Hope this is pretty clear to you :)

-KR

how to further use retrive values from database

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