custom control picturebox click handling - Visual Basic Discussion Boards

Re: The Following Code gives this Error "Object reference not set to an instance of an object."

Christian Graus7-Jan-08 21:30

Christian Graus

7-Jan-08 21:30

Vuyiswa wrote:
da.SelectCommand = cmd

You do this after you try to add the param. Seems like the selectcommand is null.

Christian Graus - Microsoft MVP - C++

"also I don't think "TranslateOneToTwoBillion OneHundredAndFortySevenMillion FourHundredAndEightyThreeThousand SixHundredAndFortySeven()" is a very good choice for a function name" - SpacixOne ( offering help to someone who really needed it ) ( spaces added for the benefit of people running at < 1280x1024 )

Re: The Following Code gives this Error "Object reference not set to an instance of an object."

Vimalsoft(Pty) Ltd7-Jan-08 21:47

Vimalsoft(Pty) Ltd

7-Jan-08 21:47

Thanks man,the code is

da.SelectCommand = cmd
da.SelectCommand.Parameters.Add("@Lis_key", strNumkey)

Thanks man, its working you are Star.

Thanks

Vuyiswa Maseko,

Sorrow is Better than Laughter, it may Sadden your Face, but It sharpens your Understanding

VB.NET/SQL7/2000/2005
http://vuyiswamb.007ihost.com
http://Ecadre.007ihost.com
vuyiswam@tshwane.gov.za

Re: The Following Code gives this Error "Object reference not set to an instance of an object."

Christian Graus7-Jan-08 22:00

Christian Graus

7-Jan-08 22:00

The trick in future is to create a breakpoint on the line that blows up, and step through it. Type da into the watch window, if it has a value, check if the SelectCommand has a value, and so on. Then when you know which one is null, you can fix it.

Re: The Following Code gives this Error "Object reference not set to an instance of an object."

Vimalsoft(Pty) Ltd7-Jan-08 22:18

Vimalsoft(Pty) Ltd

7-Jan-08 22:18

Thank you very much , i will sure do that.

Thanks

Backup and Restore

vaani7-Jan-08 19:00

vaani

7-Jan-08 19:00

Hi ,
I have to take backup and Restore in VB.net2003(frame work 1) and SQL Srver 2000. But I have no any coding in backup and retore. please send me backup and restore codingin VB.Net2003 frame work1 and SQL Server 2000.

_Vaani_

Re: Backup and Restore

Vimalsoft(Pty) Ltd7-Jan-08 21:00

Vimalsoft(Pty) Ltd

7-Jan-08 21:00

hi

There is one thing that i see you dont like doing,you dont research before you search, and you will never learn if you do that. you must Google before you post questions in the forum. Do you understand that?

here is your answer

http://www.aspfree.com/c/a/VB.NET/Simple-BackupRestore-Utility-With-SQLDMO-Using-VBNET/4/[^]

Thanks

thinstall

Tauseef A7-Jan-08 18:45

Tauseef A

7-Jan-08 18:45

hi guys

in order to prevent from security like issues i am creting my exe using thinstall and it is working correctly from any system in my intrantet under partial trusted mode, it seems fine
but is there any drawback or bug regarding this method i want to know ?
thanks in advance

hello

custom control picturebox click handling

raventatatatata7-Jan-08 16:45

raventatatatata

7-Jan-08 16:45

can anyone point out to me why when handling the click events, if I change the borderstyle of the picturebox on Click then the DoubleClick even never gets handled?

When the borderstyle is changed the image disappears from the picturebox for a half a second. Is there something I should be doing to avoid this and could this be why it's not being handled?

Thanks in advance.

Re: custom control picturebox click handling

Ajay.k_Singh7-Jan-08 23:21

Ajay.k_Singh

7-Jan-08 23:21

None of the issues mentioned is being replicated with VS 2005. Double click event is working fine as well as image is being displayed correctly, however you will get a small flicker when you change the border style.

Dave Traister,
ComponentOne LLC.
www.componentone.com

Re: custom control picturebox click handling

raventatatatata8-Jan-08 13:30

raventatatatata

8-Jan-08 13:30

Yeh - I'm not sure why it wasn't handling the DoubleClick. I had in the Click that it would get the image from the file again and the ones I was testing with were HUGE so I think that was stuffing it up a bit, but it still doesn't explain why the DoubleClick wasn't getting handled. I am using VS 2005, and now I have both being handled.
Thanks for getting back to me and my issue is now sorted... somehow LOL

Cheers

Russell

Consuming .NEt web service in VB 6.0 Client

DeepakSh7-Jan-08 11:32

DeepakSh

7-Jan-08 11:32

Hi,

I have a .NET web service which exposes a web method named "GetConfigurationItem". This web method returns an object of custom class. Here is definition of class:

class ConfigValue
{
String Name;
String Value;
}

Now the problem is when I call another web method which return a string there are no issues. But when I call the above method by capturing the return value in VB genreic data type 'Object' it throws an error "Invalid Procedure call or argument". I also tried by creating a similar class in VB client and then capturing the value in that object but in this case error is "Type Mismatch".

Could anybody please let me know where I am wrong> or is there any other way I can access such web methods.

Thanks in anticipation.

Re: Consuming .NEt web service in VB 6.0 Client

Christian Graus7-Jan-08 11:57

Christian Graus

7-Jan-08 11:57

All a web service sends and recieves is XML, I imagine the ability to send/recieve a class is a non standard thing that .NET does, through .NET serialisation. So, an alternative may be to return a string which has your two values with a delimiter.

Flow Charting in VB

ExcelMonkey7-Jan-08 7:21

ExcelMonkey

7-Jan-08 7:21

I want to create some flow charting in VB. I do not have Visio and will likely want the ability to distribute my project. What are my options? Am I forced to purchase a 3rd party component? If so, can anyone recommend one?

Thanks

EM

Re: Flow Charting in VB

Christian Graus7-Jan-08 9:35

Christian Graus

7-Jan-08 9:35

Depends on your skill level. You could write your own library to do it.

Re: Flow Charting in VB

ExcelMonkey7-Jan-08 10:02

ExcelMonkey

7-Jan-08 10:02

Always happy to take the plunge but might be limited to time. As such, would want something flawless - quickly. I was also wondering if you could use a flowlayout panel or the more advanced layout panel and just use buttons - but assuming that I will still need to connect the buttons with the appropriate directional flow arrows.

Thanks

EM

Using BindingSource 'RemoveAt' method

TheMandolinMan7-Jan-08 4:26

TheMandolinMan

7-Jan-08 4:26

I'm using Wizard generated controls in a database project.

I have a dataset, bindingsource, and table adapter. There is a datagrid bound to the binding source.

I'm trying to call RemoveAt() on the binding source, but it throws an error indicating that the list is
FixedSize and cannot be modified. How do I fix this?

Thanks in advance.

Securing OleDbConnection

ESTAN7-Jan-08 2:06

ESTAN

7-Jan-08 2:06

Hi,

I am using OleDbConnection to connect to the database. When the connection string get passed i can see clearly that the password is encrypted. But all the queries and the results are communicated in clear text. Is there a way to send this encrypted?

I just wonder, because all my passwords in the database are stored encrypted...

Thanks

PS. I am using .NET 1.1

Byte to bit?

Benny_Lava7-Jan-08 0:56

Benny_Lava

7-Jan-08 0:56

Hi,

I was wondering how to convert a byte value to a binary array.

for example the byte value 16, how to convert into 1111?

Thanks!

Re: Byte to bit?

Luc Pattyn7-Jan-08 4:26

Luc Pattyn

7-Jan-08 4:26

Hi,

AFAIK there is no direct solution, you'll have to write some code.
Here is a C# example:

static string ToBinaryString(int number) {
		char separator=',';
		int nibbles=8;
		int index=5*nibbles-1;		// 4 bits plus one separator for each nibble
		char[] chars=new char[index];
		for(int nibble=nibbles-1; nibble>=0; nibble--) {
			for(int bit=3; bit>=0; bit--) {
				char c='0';
				if((number & 1)!=0) c='1';
				chars[--index]=c;	// store the digit
				number>>=1;	// shift by one bit position
			}
			if(nibble!=0) chars[--index]=separator;
		}
		return new string(chars);
	}

It will generate a fixed-length string, i.e. zeroes get prefixed (since that is
the way I like to have non-decimal numbers), and comma's get inserted every 4 bits.

BTW it will turn 16 into "0000,0000,0000,0000,0000,0000,0001,000"
and not in "1111" (which is 15)

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Happy 2008!

Re: Please help with OWC11

Member 44698396-Jan-08 23:08

Member 4469839

6-Jan-08 23:08

Hi all,
Can you please help to guide me through the following for OWC11 in vb6:
1) plot a chart with 2 value axis, both are line chart
2) add annotations(text) in chart area, with controllable alignment, font, color and location
3) draw lines in chart area, with controllable alignment, color and location

Thanks all

BR
Vincent

security issue

Tauseef A6-Jan-08 19:53

Tauseef A

6-Jan-08 19:53

hi guys

as oledbpermission class and io access related classed need to run in full trusted environment

, but is there any way that we can create some custom persimission set like stuff to run these asseblies which require oledb and io permission to run in the partial trusted environment like intranet,, thans in advance

hello

Problem in Windows application

Member 30578876-Jan-08 18:59

Member 3057887

6-Jan-08 18:59

Hi,
I am developing a windows application. In this I have a list box which should be populated with a list of categories in the form load event.I've used a DataReader to do this. when I add a new category it should be automatically added to the list box also.I should use a seperate form to add a new category.If it's a Web appl it's very easy as the page will be refereshed every time.

Re: Problem in Windows application

Vimalsoft(Pty) Ltd6-Jan-08 20:10

Vimalsoft(Pty) Ltd

6-Jan-08 20:10

hi

Do you want those Categories to be Added to the DB, when you add them with your list box, but still appear in your form? if so , remember you cannot update a reader, then you should use a dataset. please explain angain in detail what you want to achieve

thanks

Help-Weird Problem with Masked Textbox

xbiplav6-Jan-08 18:30

xbiplav

6-Jan-08 18:30

In visual studio 2005, i have used a masked textbox control and set its mask property to phone number.

Also I am using a button to insert the phone number into the masked textbox(as shown in the code), but when i do so,
it inserts the number in the masked textbox from the end part not the beginning.

Code...

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

MaskedTextBox1.Text+="1"
End sub

How to insert the value in the masked textbox from the beginning like in a normal textbox?

Any ideas??

Re: Help-Weird Problem with Masked Textbox

Luc Pattyn6-Jan-08 18:36

Luc Pattyn

6-Jan-08 18:36

xbiplav wrote:
MaskedTextBox1.Text+="1"

that is the same as MaskedTextBox1.Text = MaskedTextBox1.Text + "1"

so it appends a single 1 to whatever is already in the MTB.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Happy 2008!

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