How to loop through records in a datatable?

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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

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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

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Krunal Rohit · Answer 1 · 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)

__TR__ · Answer 2 · 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__