Visual Basic

Re: Whats the solution? [modified]

15-Jan-07 5:44

the answer is yes. the consideration is that depending on the size of the file, that could be a large number of textboxes which could lead to issues managing that on the window.

Whats the solution?

ashwath197915-Jan-07 4:36

ashwath1979

15-Jan-07 4:36

Private Enum eLED_TEST
eLEDTEST_PASS = 1
eLEDTEST_FAIL
End Enum

Dim byteBuffer(64) as Byte
bytBuffer(1) = eLED_TEST.eLEDTEST_FAIL

After Building it gives the following error:
"Option Strict On disallows implicit conversions from 'Commlink2.Form1.eLED_TEST' to 'Byte'"

Can anyone please tell me what should be done for this?

nlarson1115-Jan-07 5:20

Delete data??????????????

15-Jan-07 5:20

bytBuffer(1) = Convert.ToByte(ED_TEST.eLEDTEST_FAIL)

-- modified at 11:45 Monday 15th January, 2007

Re: Whats the solution?

ashwath197915-Jan-07 5:37

ashwath1979

15-Jan-07 5:37

Thanks very much.

alek hunter15-Jan-07 4:23

alek hunter

15-Jan-07 4:23

hello
when I hit the delete button in BindingNavigator1 the update method of tableadapter give me this error.
"Update requires a valid DeleteCommand when passed DataRow collection with deleted rows"

how can i delete my data that be deleted in my database(SQL 2005).
thanks for your help OMG | :OMG:

Re: Delete data??????????????

Dave Kreskowiak15-Jan-07 5:48

Re: Delete data??????????????

15-Jan-07 5:48

It's telling you that it doesn't know how to delete the data in your database because you haven't supplied an SqlCommand to do the delete. How are you setting up your DataAdapter to get the data?

Dave Kreskowiak
Microsoft MVP - Visual Basic

alek hunter15-Jan-07 7:28

alek hunter

15-Jan-07 7:28

I drag my object(textbox from dataset) form myconnection and VB.Net add the bindingnavigator,tableadapter,bindingsource.
i didn't use it it use automatically.
how can i supplied an SqlCommand delete my data from database
thanks for your answer and help Confused | :confused:

Re: Delete data??????????????

Dave Kreskowiak15-Jan-07 19:24

15-Jan-07 19:24

Does your database table have a primary key? If not, there's no way for the Delete command to uniquely find each record to delete it.

Also, I find supporting the Designed generated code to be a huge problem. Writing the code yourself gives you a much greater control over the data process and makes it much easier to support since you can actually find the code.

Dave Kreskowiak
Microsoft MVP - Visual Basic

visual basic.net

kendo1715-Jan-07 3:40

kendo17

15-Jan-07 3:40

theatre booking with minimum 200 text boxes on form and maximum 600 text boxes, as seats looking for code for this to say whether the seats are booked or free as with multi dimensional array the code that is generated for each txt box would be phenomanal looking for easy way than that at present using tab index to code the programme.

MatthysDT15-Jan-07 4:07

MatthysDT

15-Jan-07 4:07

kendo17 wrote:
as with multi dimensional array

Why not just use a multi-dimensional array? Also try looping through all the controls of the type textbox in your form.

you can't forget something you never knew...

"Watching Migthy Joe Young made me hate my life..................................I want a gorilla!" A. Havemann

kendo1715-Jan-07 5:12

kendo17

15-Jan-07 5:12

would generate mass amount of code for just 1 text box.

nlarson1115-Jan-07 5:27

15-Jan-07 5:27

I don't think you need to put any code in any event of the text box. like evilnoodle said, use the control collection

you didn't specify what you wanted done when you found a free seat so the below just finds the first free textbox...

For each oCtrl as me.controls
if typeof (octrl) is textbox then
with ctype(octrl, textbox)
if .text = "free" then
.focus()
exit for
end if
end with
end if
next

Dave Kreskowiak15-Jan-07 5:26

load images in list without stopping execution

15-Jan-07 5:26

kendo17 wrote:
minimum 200 text boxes on form and maximum 600 text boxes

You really need to rethink this. If I saw an application that did this, I recommend to the customer that they uninstall it and finding a different solution provider.

Dave Kreskowiak
Microsoft MVP - Visual Basic

Eric Georgiades15-Jan-07 3:07

Eric Georgiades

15-Jan-07 3:07

i have a form with a list that shows thumbnails of many jpg pictures.

i works with a loop, that looks through the paths of the jpgs from a database, and adds the image to a image list, then adds the item into the list with the corresponding image.

works fine.

the problem is, that loading the images delays the program execution, and so I've made it into a "please wait" dialog, but still its quite slow.

how can i create a method that loads the list without the images, and then, without pausing execution, (i.e. in the background) loads the images (into the image list) one by one.

I've tried a few ways, some work but it's very inefficient Frown | :(

thank you in advance

Ericos Georgiades

Dave Kreskowiak15-Jan-07 5:46

15-Jan-07 5:46

You'll have to move your image loading code to a background thread. There's many examples of using the BackgroundWorker component. All you have to do is Google for it.

Dave Kreskowiak
Microsoft MVP - Visual Basic

Eric Georgiades15-Jan-07 7:11

Eric Georgiades

15-Jan-07 7:11

i've already tried a background worker, yet i guess i need to time it better or work on the code
cause it loads them and if you touch one unloaded it ruins certain things (guess i'd just disable them
at first)

thank you, guess i was waiting for a diffrent approach but this is probably the best way

Ericos Georgiades

nlarson1115-Jan-07 5:48

15-Jan-07 5:48

1) use a databound listbox and get the records from the database and set the datasource to the result

2) look into "threading" to load behind the scenes.

Eric Georgiades15-Jan-07 7:12

Eric Georgiades

15-Jan-07 7:12

if i set the datasource on the listbox (haven't tried it) then how do i get to load jpgs into it?

i didn't think i could, i'll give it a try (with a databound imagelist aswell?) thanks

Ericos Georgiades

nlarson1115-Jan-07 7:37