Re: Error of "failed to import the activex control. please ensure it is properly registered" - C# Discussion Boards

Re: Error of "failed to import the activex control. please ensure it is properly registered"

8-Jun-09 15:26

Hi,

I am trying to add ecgraph3d control to my project using VS 2005, the error "failed to import the activex control. please ensure it is properly registered" poped up.

I need help to fix this problem. Thank a lot in advance!

Brandon.

Christian Graus8-Jun-09 15:28

Re: Error of "failed to import the activex control. please ensure it is properly registered"

8-Jun-09 15:28

Have you registered the control ?

Christian Graus

Driven to the arms of OSX by Vista.

"! i don't exactly like or do programming and it only gives me a headache." - spotted in VB forums.

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brandonwong1238-Jun-09 18:28

Re: Error of "failed to import the activex control. please ensure it is properly registered"

8-Jun-09 18:28

Yes, I did register control using regsvr32.exe

I have been using a lot of ocx control so far and this is the only one give me that error.

Thanks,

Brandon

N a v a n e e t h8-Jun-09 18:39

N a v a n e e t h

8-Jun-09 18:39

Assuming your control got registered successfully, try clearing all the files in obj/debug or obj/release. Now try to add the control again.

If you have problem in registering control using regsvr32, use dependency walker and profile regsvr32 by specifying the dll to be registered.

Navaneeth

How to use google | Ask smart questions

Re: Error of "failed to import the activex control. please ensure it is properly registered"

brandonwong1238-Jun-09 19:01

Re: Error of "failed to import the activex control. please ensure it is properly registered"

8-Jun-09 19:01

Navaneeth,

I have tried many time to delete the files in obj and debug folder but the error is still there.

I am not sure I have problem using regsvr32 or not since I have used to register a lot of controls so far. All works fine, except this control ecgraph3D.ocx

How can I use dependency walker and profile regsvr32 ?

Many thanks,

Brandon

Christian Graus8-Jun-09 19:02

Re: Error of "failed to import the activex control. please ensure it is properly registered"

8-Jun-09 19:02

brandonwong123 wrote:
I am not sure I have problem using regsvr32 or not

The problem is obviously going to be specific to the control.

Does the control come with any samples ? Do they work ?

brandonwong1238-Jun-09 19:10

Re: Error of "failed to import the activex control. please ensure it is properly registered"

8-Jun-09 19:10

Christian,

The control comes with visual basic 6 example and it works on my machine. This company has ecgraph.ocx and it works on my visual studio 2005. Now they just have ecgraph3D.ocx as their new product but this control doesn't want to work on my C# 2005

Thanks,

Brandon

Christian Graus8-Jun-09 19:17

Re: Error of "failed to import the activex control. please ensure it is properly registered"

8-Jun-09 19:17

So the VB6 sample you have is for the new control, or the old one ? If that works, then the issue is somewhere in how you're importing the file.

brandonwong1239-Jun-09 6:24

Get DataGridView ComboBox Column value??

9-Jun-09 6:24

Christian,

The VB6 example is for the new control. I just try to add control on different computer and error is the same.
I am not sure what is causing this problem.

Any further help, please let me know.

Thanks,

Brandon

jasper0188-Jun-09 15:07

jasper018

8-Jun-09 15:07

Hello All,

I hope someone can help. I have a dataGridView populated with data, I have added a dataGridViewComboBoxColumn. The dataGridViewComboBoxColumn is populated per row. That all works great. The issue I am having is getting the value of a dataGridViewComboBoxColumn Cell.

The last thing I tired is:

DataGridViewComboBoxCell cell = dataGridView1[cntR, cntC] as DataGridViewComboBoxCell;
string val = cell.ValueMember.ToString();
string val2 = cell.Value.ToString();

Which always returns "" for both.

Any help would really be great.

j

Re: Get DataGridView ComboBox Column value??

jayveebishie23-Oct-10 4:46

jayveebishie

23-Oct-10 4:46

i have the same problem

dgvPhysioSession.Rows[rowIndex].Cells["Diagnosis"].Value

it returns null

Set an arrays items to new strings

Jasmine Pomelo8-Jun-09 14:44

Jasmine Pomelo

8-Jun-09 14:44

Humm this is a puzzler im settings from a .txt file which looks like this

//This is the directory which your downloaded files will be stored in
DownloadFolder = /mnt/md1/public/Downloads

//The telnet user usualy root
TelnetUser = root

//The telnet password
TelnetPassword = root

//The IP of your NAS eg 192.168.2.2
TelnetIP = 192.168.2.2

I want to convert these values into strings eg TelnetIP = 192.168.2.2 so they can be reused on multiple forms . So ive got them importing with a StreamReader below

private void LoadSettings()
{
StreamReader Settings = new StreamReader("Settings.txt");
string line;
while ((line = Settings.ReadLine()) != null)
{
if (line.StartsWith("/"))
{
}
else
{
string[] splitArray = line.Split(new char[] { '=' });
MessageBox.Show(splitArray[0]);

}
}

}

So in this case splitArray[0] gives DownloadFolder and splitArray[1] gives /mnt/md1/public/Downloads perfect but how do i join them back togeather to give

DownloadFolder = /mnt/md1/public/Downloads

And also im getteng blank lines coming through as settings else if (line.StartsWith("/r/n")) or \r\n dosnt seem to catch them

any ideas ? thanks

Re: Set an arrays items to new strings

jasper0188-Jun-09 15:16

jasper018

8-Jun-09 15:16

I do not know if this will work but I know when I use string you have to be careful of slashes and so on so for one you could try:

private void LoadSettings()
{
StreamReader Settings = new StreamReader("Settings.txt");
string line;
while ((line = Settings.ReadLine()) != null)
{
if (line.StartsWith(@"/"))
{
}
else
{
string[] splitArray = line.Split(new char[] { '=' });
MessageBox.Show(splitArray[0]);

}
}
}

The at symbol will ensure it is read as string....

as for getting the strings back together you could use a string builder or just add the values together

string var = (splitArray[0] + " = " + splitArray[1]);

I am not sure if that is the best way to do it. Hope that helps.

Re: Set an arrays items to new strings

Jasmine Pomelo8-Jun-09 15:31

Jasmine Pomelo

8-Jun-09 15:31

Hum im getting System.IndexOutOfRangeException was unhandled
Message="Index was outside the bounds of the array."

i think it might have something to do with splitArray[0] being empty , The line brakes seem to have gotten through

'is' operator

Member 10339078-Jun-09 11:27

Member 1033907

8-Jun-09 11:27

The MSDN on 'is' operator says ...the provided object can be cast to the provided type without causing an exception to be thrown. Suppose I have the following code:

object x = FunctionThatReturnsAnInteger();
if(x is decimal)
    Console.WriteLine("Hello world");

The above condition is never true because x is of type integer, not decimal, but - int can be cast to decimal without an exception being thrown - so why does it not work?

More directly to my problem - what is the fastest (in runtime) way to check, if a variable (of type 'object', in general) can be cast to decimal? I can obviously try this in a try-catch block, but I wonder if there are ways that perform better.

Thanks for sugegstions, H.

Christian Graus8-Jun-09 11:33

8-Jun-09 11:33

These are integral types, is only works for classes. This should not compile. The is operator WILL work with a class structure.

class Base
class Derived1 : Base

Derived1 n;

if ( n is Base )
{
// this will work
}

Member 1033907 wrote:
what is the fastest (in runtime) way to check, if a variable (of type 'object', in general) can be cast to decimal?

I suspect you need your try/catch block. You also have the cost of boxing to contend with. You could try calling ToString on the object and then decimal.TryParse, that should work for things like int.

Member 10339078-Jun-09 11:40

Member 1033907

8-Jun-09 11:40

Thanks for your reply.

Christian Graus wrote:
This should not compile.

I compiles fine, 'is' works with structures as well. And besides - 'x' in the previous example is of type 'object', so the compiler has no way of knowing it is going to contain an integer.

Christian Graus wrote:
You could try calling ToString on the object and then decimal.TryParse, that should work for things like int.

String parsing seems to me like the slowest possible approach. I guess I'll go with the try/catch, which is guaranteed to work, unless someone comes with something faster.

Christian Graus8-Jun-09 11:57

8-Jun-09 11:57

Member 1033907 wrote:
I compiles fine, 'is' works with structures as well.

I didn't think that was the case. I know I've had 'is' not compile for me before because I used an integral type.

Member 1033907 wrote:
String parsing seems to me like the slowest possible approach

Well, you're already paying the cost of boxing, which is expensive, and talking about try/catch, which is VERY expensive.

Member 1033907 wrote:
I guess I'll go with the try/catch, which is guaranteed to work, unless someone comes with something faster.

I would do some testing to see which is faster.

Christian Graus8-Jun-09 12:05

8-Jun-09 12:05

I've got it. It's 'as' that doesn't work, because int cannot be null. But, is and as both rely on an inheritance tree, they do not try to do any sort of conversion between types. decimal does not derive from int, or vice versa, so neither of those will work. You're asking if the type can be converted, not if it is of that type to start with.

Colin Angus Mackay8-Jun-09 12:54

Colin Angus Mackay

8-Jun-09 12:54

Member 1033907 wrote:
int can be cast to decimal without an exception being thrown - so why does it not work?

Just because you can cast to it does not mean it is part of the same type heirarchy. Types can provide their own casting operators to make coercion to other types easier for the programmer.

is/as only work on things when they are along the same branch of an object heirarchy.

decimal derives from object. int derives from object. Each is heading down different branches.

Man who stand on hill with mouth open wait long time for roast duck to drop in