How to loop through records in a datatable?

Question

0.00/5 (No votes)

See more:

I want to loop through the records of the datatable and retrieve data from the each column of the datatableand fill the textboxes.
what should i do to moveNext button?
I have tried :

VB

Protected Sub btn_next_Click(sender As Object, e As EventArgs) Handles btn_next.Click


        Dim i As Integer = 0


        For i = 0 To MaxRows
            i = i + 1
            NavigateRecords(i)

        Next
End Sub

Where  :
 MaxRows = tb.Rows.Count

 Private Sub NavigateRecords(int As Integer)




        Dim conn As New OleDb.OleDbConnection
        Dim strConn As String = "Provider=SQLOLEDB; Data Source=; Initial Catalog=; User ID=; Password="

        conn.ConnectionString = strConn

        conn.Open()
        Dim dst As New DataSet
        Dim da As OleDb.OleDbDataAdapter
        Dim tb As DataTable = dst.Tables("Client")

        Sqll = "SELECT * FROM Person"



        da = New OleDb.OleDbDataAdapter(Sqll, conn)
        da.Fill(dst, "Customer")
 MaxRows = tb.Rows.Count
       txt_vl.Value = tb.Rows(int).Item("value")

[Edit]Added code based on OP's comment[/Edit]

Posted 23-Nov-12 0:56am

lovitaxxxx

Updated 23-Nov-12 1:59am

__TR__

v2

Add a Solution

Comments

lovitaxxxx 23-Nov-12 7:12am

I have tried :

Protected Sub btn_next_Click(sender As Object, e As EventArgs) Handles btn_next.Click

Dim i As Integer = 0

For i = 0 To MaxRows
i = i + 1
NavigateRecords(i)

Next
End Sub

Where :
MaxRows = tb.Rows.Count

Private Sub NavigateRecords(int As Integer)

Dim conn As New OleDb.OleDbConnection
Dim strConn As String = "Provider=SQLOLEDB; Data Source=; Initial Catalog=; User ID=; Password="

conn.ConnectionString = strConn

conn.Open()
Dim dst As New DataSet
Dim da As OleDb.OleDbDataAdapter
Dim tb As DataTable = dst.Tables("Client")

Sqll = "SELECT * FROM Person"

da = New OleDb.OleDbDataAdapter(Sqll, conn)
da.Fill(dst, "Customer")
MaxRows = tb.Rows.Count
txt_vl.Value = tb.Rows(int).Item("value")

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

__TR__ · Answer 1 · 2012-11-23T02:05:00

Solution 3

Check the below links
Looping through all rows of the DataTable[^]
http://www.dotnetperls.com/datarow-vbnet[^]

Posted 23-Nov-12 2:05am

__TR__

Krunal Rohit · Answer 2 · 2012-11-23T02:03:00

Solution 2

loop through all records:

Dim table As DataTable = GetTable
' Get the data table.
For Each row As DataRow In table.Rows
    Console.WriteLine("--- Row ---")
    ' Print separator.
    For Each item As var In row.ItemArray
        Console.Write("Item: ")
        ' Print label.
        Console.WriteLine(item)
        ' Invokes ToString abstract method.
    Next
Next
Console.Read

Posted 23-Nov-12 2:03am

Krunal Rohit

Comments

lovitaxxxx 23-Nov-12 8:16am

what about if i want to create e previews button?

[no name] 23-Nov-12 8:21am

Like ???

lovitaxxxx 23-Nov-12 8:28am

for example:
Protected Sub btn_previews_Click(sender As Object, e As EventArgs) Handles btn_previews.Click

If (i > 0) Then

i = i - 1

NavigateRecords(i)
End If
End Sub

[no name] 23-Nov-12 8:33am

Okay, do this: I'm assuming that now you're able to go through each row ok.. So get the each row make the row as selected using currentRow-1... (Actually I'm not much good in VB .NET like C# .NET.. So I can help you with C# code)