Solved

ASP.net C# Simple example of using a reader to loop through fields as in VB.net

Posted on 2012-03-20
3
372 Views
Last Modified: 2012-03-25
Hi. I am new to C#. Could someone please direct me to a code example of reading through a SQL database in a similar fashion to the VB.net code below


  Protected Sub Login_Button_Click(sender As Object, e As EventArgs) Handles Login_Button.Click

        Dim oAdminID As String
        Dim oPassword As String
        Dim SQL As String

        Dim myConnection As SqlConnection = New SqlConnection("server=196cc;uid=Murray;pwd=cct;database=sgg")

        'Dim command As SqlCommand = New SqlCommand("SELECT * From Reviewers;", myConnection)

        SQL = "SELECT * From Administrators"
        Dim command As SqlCommand = New SqlCommand(SQL, myConnection)
        Try

            myConnection.Open()

            Dim reader As SqlDataReader = command.ExecuteReader()

            If reader.HasRows Then

                Do While reader.Read()
                    If Not reader("AdminID").Equals(DBNull.Value) Then
                        oAdminID = reader("AdminID").ToString()
                    Else
                        oAdminID = ""
                    End If
                    If Not reader("Password").Equals(DBNull.Value) Then
                        oPassword = reader("Password").ToString()
                    Else
                        oPassword = ""
                    End If


                    If oAdminID = Me.AdminID.Text Then
                        If oPassword = Password.Text Then

                            Me.Label_LoggedIn.Text = "Logged in:"
                            Me.Label_Reviewer.Text = oAdminID


                            Me.Label_Error1.Text = ""
                            Me.Panel1.Visible = True

                        Else
                            Me.Label_Error1.Text = "The password that you entered does not match the Reviewer namee."
                        End If
                    Else
                        Me.Label_Error1.Text = "The username entered does not exist"
                    End If

                Loop
            Else
                'Console.WriteLine("No rows found.")
            End If

            reader.Close()

            myConnection.Close()

        Catch ex As Exception
            Me.Label_Error1.Text = ex.Message
        End Try
    End Sub
0
Comment
Question by:murbro
3 Comments
 
LVL 7

Accepted Solution

by:
Lalit Chandra earned 500 total points
ID: 37744931
try this
string oAdminID = null;
string oPassword = null;
string SQL = null;

SqlConnection myConnection = new SqlConnection("server=196cc;uid=Murray;pwd=cct;database=sgg");

//Dim command As SqlCommand = New SqlCommand("SELECT * From Reviewers;", myConnection)

SQL = "SELECT * From Administrators";
SqlCommand command = new SqlCommand(SQL, myConnection);

try {
      myConnection.Open();

      SqlDataReader reader = command.ExecuteReader();


      if (reader.HasRows) {
            while (reader.Read()) {
                  if (!reader("AdminID").Equals(DBNull.Value)) {
                        oAdminID = reader("AdminID").ToString();
                  } else {
                        oAdminID = "";
                  }
                  if (!reader("Password").Equals(DBNull.Value)) {
                        oPassword = reader("Password").ToString();
                  } else {
                        oPassword = "";
                  }


                  if (oAdminID == this.AdminID.Text) {

                        if (oPassword == Password.Text) {
                              this.Label_LoggedIn.Text = "Logged in:";
                              this.Label_Reviewer.Text = oAdminID;


                              this.Label_Error1.Text = "";
                              this.Panel1.Visible = true;

                        } else {
                              this.Label_Error1.Text = "The password that you entered does not match the Reviewer namee.";
                        }
                  } else {
                        this.Label_Error1.Text = "The username entered does not exist";
                  }

            }
      } else {
            //Console.WriteLine("No rows found.")
      }

      reader.Close();

      myConnection.Close();

} catch (Exception ex) {
      this.Label_Error1.Text = ex.Message;
}
0
 
LVL 26

Expert Comment

by:Anurag Thakur
ID: 37745030
There are free code conversion sites available on the Internet which convert code from vb.net to c# and vice versa.

In an answer to your another question I have give a link for C# tutorial on ado.net and that will also be helpful for you.
0
 

Author Closing Comment

by:murbro
ID: 37763069
Thanks
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

We all know that functional code is the leg that any good program stands on when it comes right down to it, however, if your program lacks a good user interface your product may not have the appeal needed to keep your customers happy. This issue can…
International Data Corporation (IDC) prognosticates that before the current the year gets over disbursing on IT framework products to be sent in cloud environs will be $37.1B.
With the power of JIRA, there's an unlimited number of ways you can customize it, use it and benefit from it. With that in mind, there's bound to be things that I wasn't able to cover in this course. With this summary we'll look at some places to go…
Hi friends,  in this video  I'll show you how new windows 10 user can learn the using of windows 10. Thank you.

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

19 Experts available now in Live!

Get 1:1 Help Now