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ASP.net print results of database SQL statement

Posted on 2010-11-22
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Last Modified: 2012-06-21
Hi

I am using the code shown in the code section below to get all the records
from a table in a database held online. How do I print my results on the webpage?
Do I use "Response"
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click


        '// define a connection to the database
        Dim cn As New OleDbConnection(ConfigurationManager.ConnectionStrings("WhatEverNameYouWant").ConnectionString)

        '// define the sql statement to execute
        Dim cmd As New OleDbCommand("SELECT * FROM [Contacts]", cn)

        Try

            '// open the connection
            cn.Open()

            '// execute the sql statement
            Using reader As OleDbDataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection)

                While reader.Read()
                    '// this loops through all of the returned records
                End While

            End Using

        Catch ex As Exception
            Response.Write(ex.Message)
        Finally
            If cn.State <> ConnectionState.Closed Then
                cn.Close()
            End If
        End Try


    End Sub

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Question by:Murray Brown
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10 Comments
 
LVL 7

Expert Comment

by:meispisces
ID: 34190848
"Print results on webpage".You mean to print the results only or the entire webpage with results. Please explain what you wish to do so in detail..

Thanks
0
 
LVL 34

Expert Comment

by:Paul MacDonald
ID: 34190856
One way would be to issue
  RESPONSE.WRITE(whatever)
inside your loop.  That will give you a page full of whatever is coming out of the database.  It won't be formatted in any particular way, but you'll be able to read it.

Just for testing, you might try
 RESPONSE.WRITE(whatever & "<br />")
so each item out of the database is on its own line in the page.
0
 

Author Comment

by:Murray Brown
ID: 34190926
Thanks but how do I write each record. What do I put where you have put "whatever"
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LVL 52

Accepted Solution

by:
Carl Tawn earned 2000 total points
ID: 34190954
Just dumping everything using Response.Write is how you would do things in Classic ASP, we've moved on bit since then :)

The quickest way to get your data up on screen would be to bind it to a GridView. Drop a GridView onto your page from the Toolbox. Then replace these lines:

                While reader.Read()
                    '// this loops through all of the returned records
                End While

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With:
GridView1.DataSource = reader
GridView1.DataBind()

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0
 

Author Comment

by:Murray Brown
ID: 34191173
Thanks but how do I write each record in each response?
0
 
LVL 34

Expert Comment

by:Paul MacDonald
ID: 34191222
...
   While reader.Read()
      Response.Write(reader("column_name") & "<br />")
   End While
...

As both [carl_tawn] and I note, this is a quick and dirty method.  It will give you what you asked for, but it won't be formatted (look nice).
0
 
LVL 52

Expert Comment

by:Carl Tawn
ID: 34191272
If you are just starting out with ASP.Net then it will really be worth your while going through the samples here:
 
    http://www.asp.net

It will teach you the basics of working with data, binding to controls and the types of data presentation controls available.
0
 

Author Closing Comment

by:Murray Brown
ID: 34199136
Thanks very much. Sorry for late reply
0
 

Author Comment

by:Murray Brown
ID: 34199429
Thanks carl_tawn. I just hosted my first online Access darabase> Really appreciate all your help and patience. Murray
0
 
LVL 52

Expert Comment

by:Carl Tawn
ID: 34199487
No problem. Glad you got there in the end :)
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