Visual Basic

Re: Find method is not working with untyped datatype

11-Apr-05 2:01

Hi,
I guess there is no method like "Find" for Datatable Object....

u can use

drFoundRow = Datatable.Rows.find(Textbox1.text.Trim)

to get the appropriate Row.

Regards,
Ritesh

Suman Singh14-Apr-05 11:43

What is the main difference between Display member and Valuemember

14-Apr-05 11:43

I m exactly using this code..

But when I use untyped dataset

dim ds as dataset

it gives error..

I f i take dataset from controls(toolbox) which is the typed sataset..

It is working fine.

I wanted to know .. why ???

Thanks in advance for your reply

Suman Singh

Suman Singh10-Apr-05 23:17

Re: What is the main difference between Display member and Valuemember

10-Apr-05 23:17

What is the main difference between Display member and Valuemember property of a listbox or a combobox.

Ritesh123411-Apr-05 1:57

Re: What is the main difference between Display member and Valuemember

11-Apr-05 1:57

Hi,
The very basic difference is that user/Customer can see "DisplayMember" on UI while Developer can work with "Valuemember" which is hidden behind the DisplayMember..

I would like to give u one simple example........let's say ur combobox supposed to show the Country list. when u fetch the records from DB u will select Country name along with it'd ID.(select C_ID,C_Name from country)
Now while showing these records u will show the Country Name on ur UI hance u will set "DisplayMember" of combobox to "C_Country" while doing any DB related thing u will require the ID of the selected Country hence u will set Valuemember with "C_ID"

Now u can access the ID of selected Country using SelectedValue Property of Combobox as cboCountry.SelectedValue Property

I hope this will help u...............:->

Regards,
Ritesh

AmbiguousName6-Feb-12 19:13

AmbiguousName

6-Feb-12 19:13

hi,

almost 7 years later, you answer helped me understand the difference Smile | :)

Re: What is the main difference between Display member and Valuemember

lelouch_vi 215-Mar-20 1:59

lelouch_vi 2

15-Mar-20 1:59

15 years later... Now it helps me a lot. Thank you for this answer. Very clear and concise.

How to validate dataview is NULL

Suman Singh10-Apr-05 23:15

Re: How to validate dataview is NULL

10-Apr-05 23:15

I want to chech whether a dataset is blank or there are any record in it ?

A sample code will be more helpful.

Thanks

Ritesh123411-Apr-05 1:44

How to fetch rows from a dataview?

11-Apr-05 1:44

Hi,
U can check the Dataset or Datatable whether they have any data(Rows) in it as follows..........

If Not dsNewData Is Nothing Then<br />
                If dsNewData.Tables.Count > 0 Then<br />
                    If Not dsNewData.Tables("TableName") Is Nothing Then<br />
                    'If u want u can check for dsNewData.Tables("TableName").Rows.Count>0<br />
                        MessageBox.Show("Table has :" & dsNewData.Tables("TableName").Rows.Count & " Rows")<br />
                    End If<br />
<br />
                End If<br />
            End If

I hope this will help u..............

Regards,
Ritesh

Suman Singh10-Apr-05 23:14

10-Apr-05 23:14

I m trying to fetch rows from dataview.

Can anyone help me?

A sample code will be more helpful.

Thanks

Ritesh123411-Apr-05 1:40

11-Apr-05 1:40

Hi,
U can access the records detail from dataview as follows.......

For intRowIndex = 0 To pi_dtTable.DefaultView.Count - 1<br />
        MessageBox.Show(pi_dtTable.DefaultView.Item(intRowIndex).Item("ColName"))<br />
    Next

I hope this will help u...........:->

Regards,
Riesh

Suman Singh11-Apr-05 11:43

11-Apr-05 11:43

Hi Ritesh,

Thanks for your all reply.

Can you please let me know,

what have u declared these variables as:

intRowIndex
pi_dtTable

Anonymous11-Apr-05 22:38

Anonymous

11-Apr-05 22:38

hello

Private inrowindex as integer
Private pi_dtTable as datatable

whatever the modifier you want use it Smile | :)

Suman Singh14-Apr-05 11:49

Re: Change line in text file

14-Apr-05 11:49

ok...

dim dv as dataview

dv.rowsfilter = "id like 'C%'

Now i want to fetch one record from this dataview..

Please remember i have done this with datatable and dataset..

Thanks in advance for your reply.

Suman Singh

printing using tcp/ip

confirmnot10-Apr-05 22:34

confirmnot

10-Apr-05 22:34

Hi i have beening to send the following codes to a printer connected to my pc through an ethernet hub, but i could not be able to print a printer-ready data successfully. it only printed out rubbish value

Can anyone help me here?

(the printer ready data are a series of strings that contain Printer Control language which the printer can understand. It the string has been tested by sending it through a parallel port, and it proved it can be read by the same printer.)

Dim Buffer() As Byte
Dim oEncoder As New System.Text.ASCIIEncoding
Dim oEnc As System.Text.Encoding = oEncoder.GetEncoding(1252)
Buffer = oEnc.GetBytes(Chunk)

Dim client0 As New System.Net.Sockets.TcpClient("169.254.192.155","9100")

Dim stream As System.Net.sockets.NetworkStream = client0.GetStream()

stream.Write(Buffer, 0, Len(Chunk))

client0.Close()
stream.Close()

Change line in text file

johnjsm10-Apr-05 22:32

johnjsm

10-Apr-05 22:32

Hi,
Could anyone help me. I need to read through a text file to find a certain line of text that remains the same and then change it to a different line of text and save it. I am using VB 6 but having no luck.
If anyone could help it would be great.
Thanks

Dave Kreskowiak11-Apr-05 1:22

Dave Kreskowiak

11-Apr-05 1:22

Unless the change you make is exactly the same length as what you're replacing, you'll have to read in the entire file, make the change, and write the entire file back out.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Datgrid Column style

Anonymous10-Apr-05 21:31

Anonymous

10-Apr-05 21:31

Can the style/font/color of a header in a datagrid be changed selectively using VB.NET? If Yes, How?

Re: Datgrid Column style

Suman Singh10-Apr-05 23:11