timothybard is right, just Cdbl won't solve it :)

it would be better if you post your code
any way , I think you didn't convert from string to double before calculating,
you wrote like this
Balance.Text = coursefees - installment1.Text
it may...

1/to use image in the form you need PictureBox Control (http://www.startvbdotnet.com/controls/gbox.aspx)
2/in order to change the picture whenever the user select item from the comboBox you use the...

there are many good tutorials in net like this (http://www.homeandlearn.co.uk/NET/nets12p4.html) and this (http://www.itwriting.com/pcw/vbdotnetdata.php)
you can search for more and it will help...

if you removed these lines, return them and see if you still have this problem
:S

there is no table 0 in your dataset



sorry I was mistaken here, Record_num should be initialized with -1 not 0

this time it should really work , just be sure of your dataset that it...

the problem still the same , you mean it just shows the last record ?

if yes , as I said before initializing Record_num with zero inside the button code is your problem

just imagine what will...

is it solved ? or you still have problem :S

the problem that you decleared Record_num inside the next_button code, here each time the user choose next button Record_num will have the same value
define it outside it

public class form1
dim...

i do not understand your code.
>>"this the code for button next n previous" you mean that the same code for next and previous ? each one has its own code
i = 0
For i = 0 To -1
TextBox1.Text =...

first thing you need to store the special characters in array (http://www.startvbdotnet.com/language/arrays.aspx), so you will declear array
Dim SC(36) As charafter that store values
SC(0) = "Ï"...

Variables that you declared are different from what you used .

write your code here please

You do not declare InitialValue.text you just declare variable as textbox.
textbox has many properties one of them is text
we access properties of InitialValue variable by typing InitialValue....

you need to do as Jx_Man suggest , use Convert.ToSingle

maybe you trying to read while you reached the end of file ,

i think this return length on byte , try this
fLen1 = Int(f1.Length / 4)

are you asking about how to loop thru database ? i think like this
count = Me.DataSet.Table_Name.Count
For i = 0 To count - 1
m = Me.DataSet....

use boolean varaible to indicate if the user enter correct value for each input like this
If Val(employeeid_txt.Text) > 10 Or Val(employeeid_txt.Text) < 1 Then
...

i think that's wrong , you need to add 125,000 to the population grouth each year
number=number+(number*4.3) [/QUOTE][QUOTE]Loop Until count = 200000
.
other thing why you stop looping untill...

I think this not right , daDocuments.Update takes two argument one of them is dataset and the other is table

OleDbDataAdapter1.Update(DataSet11, "table_name")
also you can use ...

according to this link (http://www.homeandlearn.co.uk/NET/nets4p12.html) DidWork is integer variable
Dim DidWork As Integer = openFD.ShowDialog()
so in this line If DidWork <> DialogResult.Cancel...

I am not sure if I understand you well :S
do you want to clear the textbox from data when user click some button ?
you do like this

Private Sub Button1_Click(ByVal sender As...

first of all if is NOT loop u use it to test condition and i do not know why u using the for or while loop !
in ur code each time u press next button what will happen is
1/ make connection to...

Ok
Your code won't display the next record , it will always display the same record over and over , any way I think it’s the last one in table not the first.
The problem is u not keep track of...

sure ...

it works with me....just check if the column 1 exist in ur tabel....
and did u clear dataset and fill dataadapter???

hi again..just one column ..so no need to collect it to one string i thought u want to show row of many columns..
any way..ofcourse u need to give c value at start...
Dim c As...

see.... when u have dataset it represent the table in database that u have
so if u have r rows and c column ...u will go through one row at time and collect all the columns in it..
item=""
with 2...

sure any time

hi ....
i did this ..first u need dataset and data adapter...
then u will go through each row in dataset and collect the items in one string...then use
CheckedListBox1.Items.Add(the string u...

No......it dose have value
i want to write program that read the names of student of specific section from excel file and display it in textbox

actually each cell has name of student

thanks....
i don't have now run time error
but i tried to display result on textbox i always have empty textbox???

hi
I want to know how to read from excel file
i know how to open it but how to store cell's value from excel to the variable
i wrote
varname=xlsheet.Cells(1, 1)

and i got run timeerror
"cast...