Checking a registry key exists - C# Discussion Boards

Trapper-Hell10-Jun-09 6:25

10-Jun-09 6:25

Thanks mate! It appears to be just what I wanted... Looks more complex then the methods I'm currently using but I guess that's the way to go... Thanks a lot Wink | ;)

Re: HttpResponse Compression... ?

saurabh sahay10-Jun-09 6:35

saurabh sahay

10-Jun-09 6:35

You welcome buddy Smile | :)

Extracting Repeating Table Data In a Web Part

lday8610-Jun-09 5:42

lday86

10-Jun-09 5:42

Hi,

I am pretty new to developing in InfoPath and SharePoint. I have the requirement to extract repeating table data from an InfoPath form using web part (written in C#).

I have been looking into how I might go about doing this but I don't seem to have come up with a solution.

I have tried getting the document as an XML document but it will not let me open it in the web part and claims I don't have the correct permissions, even though i have full permissions across the whole site (including on the document library)

Could anyone point me in the right direction or offer any advice?

Many thanks in advance,
Luke

changing the color and text of the label control dynamically from the retrieved values from the database

praveenkumar_vittaboina10-Jun-09 4:58

praveenkumar_vittaboina

10-Jun-09 4:58

For a label control i dynmically changed the font and color of the text and then i stored those values in the database(access) and i want to apply the values stored in the database to other labels. How to apply those stored values to other labels from the database. I retrieved those values from database i got the values as string , then how to apply these string values to change the color of the label.

Re: changing the color and text of the label control dynamically from the retrieved values from the database

Tom Deketelaere10-Jun-09 5:22

Tom Deketelaere

10-Jun-09 5:22

praveenkumar_vittaboina wrote:
i got the values as string

Storing colors should result into a numeric value.

look at the 'color.toargb' and 'color.fromargb' functions.
Or 'color.toknowncolor' and 'color.fromknowncolor' functions

crystal reports problem after installing the application.

praveenkumar_vittaboina10-Jun-09 4:57

praveenkumar_vittaboina

10-Jun-09 4:57

the project which i am doing is windows based project . In that i need to generate some reports , so i did that with crystal reports and then i created a setup file and then i installed in another system, then i am getting the exception . After that i removed crystal reports from my project and again i installed the setup file , then its working fine. I want to know how to include the reports.

Re: crystal reports problem after installing the application.

Tom Deketelaere10-Jun-09 5:19

Tom Deketelaere

10-Jun-09 5:19

Without knowing more about the error you get I think you need to install the crystal report framework.
You can include this into your .net setup.
Google for merge modules on how to do that.
The crystal reports site has the download for their merge modules somewhere but I can't find the link right now.

Checking a registry key exists

Martin3108810-Jun-09 4:21

Martin31088

10-Jun-09 4:21

Hi everyone,

I'm writing a little application and I've hit a bit of a problem.

part of the program uses the registry to store certain things. I have no problem writing or reading a key. But I need to be able to check the key exists, if it does do this, if not write the key.

Here's the code I'm currently using:

using Microsoft.Win32;<br />
RegistryKey MyRegKey = Registry.LocalMachine.OpenSubKey("software\\MyApp\\SaveData");<br />
            if (MyRegKey != null)<br />
            {<br />
                string OptCurrency = MyRegKey .GetValue("Currency").ToString();<br />
            }<br />
            else<br />
            {<br />
                RegistryKey CreateMyRegKey = Registry.LocalMachine.CreateSubKey("software\\MyApp\\SaveData");<br />
                CreateMyRegKey .SetValue("Currency", 0);<br />
                string OptCurrency = "0";<br />
            }<br />
MyRegKey.Close();

This is fine if the key exists, but doesn't recognise if it does not, and runs through the if rather than the else.

Any help would be greatly appreciated
Many thanks
Martin

Re: Checking a registry key exists

Henry Minute10-Jun-09 4:45

Henry Minute

10-Jun-09 4:45

I am not sure that I understand this.
Are you saying that if software\\MyApp\\SaveData doesn't exist, the if part of your code executes?

BTW: if you surround your code snippet with <pre></pre>, rather than <code></code>, it will allow you to retain the formatting and make it easier for others to read. (use the 'code block' widget, not the 'inline code' one).

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

Re: Checking a registry key exists

Martin3108810-Jun-09 4:57

Martin31088

10-Jun-09 4:57

the other way around, if that key doesn't exist run the else part to create the key.

Re: Checking a registry key exists

Henry Minute10-Jun-09 5:07

Henry Minute

10-Jun-09 5:07

I realise that is what you intend to happen. But your OP indicated the reverse.

This is fine if the key exists, but doesn't recognise if it does not, and runs through the if rather than the else.

indicates to me that the if block gets executed regardless of whether the key exists or not.

Perhaps you might try rewording your question, to differentiate what you want to happen from what currently happens.

Re: Checking a registry key exists

Martin3108810-Jun-09 5:35

Martin31088

10-Jun-09 5:35

Currently
It does run through the if regardless of whether the key exists or not. The way the code is at the moment (some changes have been made to the previous post) the key will get created if it does not exist. I can then make a change in the options of my application and apply them which saves the change to their respective keys.

Then when I close the program and re-open it, the keys are reset back to the default because the code is running through the wrong part of my if statement and overwriting the key.

Intended
I would like it to be able to tell if the key exists, if it does not, create it, if it does, copy the value of each key into the defined global variables. So that program can use these values wherever necessary.

I'll post the altered code if you need.
I hope this clears it up.
Thanks

Re: Checking a registry key exists

Henry Minute10-Jun-09 6:16

Henry Minute

10-Jun-09 6:16

I do not use the registry any more, or very rarely, so I have had to go back and look at some of my old code.

The only obviously different things that I used to do is as below.

string myAppSaveDataSubKey = @"software\MyApp\SaveData"; <=== use a variable. saves having to keep typing it in and possible typos
using (RegistryKey MyRegKey = Registry.LocalMachine.OpenSubKey(myAppSaveDataSubKey)) <== using 'using' saves having to remember 'close'
{
    if (MyRegKey == null)  <=========== Check == null instead of != null
    {
        RegistryKey CreateMyRegKey = Registry.LocalMachine.CreateSubKey(myAppSaveDataSubKey);
        CreateMyRegKey.SetValue("Currency", 0);
        string OptCurrency = "0";
    }
    else
    {
        string OptCurrency = MyRegKey.GetValue("Currency").ToString(); <== you need to load OptCurrency anyway so don't 'else' it
    }
}

which used to work OK for me.

The only other thing you might consider is to use CreateSubKey instead of OpenSubKey. This has the advantage of creating the subkey if it doesn't exist, and simply opening it for writing if it does.

Hope some of this is useful. Smile | :)

Re: Checking a registry key exists

Martin3108810-Jun-09 6:28

Martin31088

10-Jun-09 6:28

Thanks for the suggestion, I'll have to look at it tomorrow.

I'll let you know how I get on.

Thanks alot for your support
Martin

Re: Checking a registry key exists

Martin3108810-Jun-09 23:57

Martin31088

10-Jun-09 23:57

I've finally sorted it!

I used some suggestions from your last post which helped. But I decided to tackle it from a different angle, eventually i came up with doing a valueCount

If (Count != 3)
{
create the keys
}
then copy values of each.

Works perfectly.

Thanks alot for your support Henry
Best regards
Martin

checkedlistbox - save checked items for future run

havejeet10-Jun-09 3:50

havejeet

10-Jun-09 3:50

Hi friends,

I have a checkedlistbox control on my windows form. Now when Application runs, every item is unchecked and user checks the items as per his choice. I want that - next time when user runs the application - checkedlistbox should be loaded with the same items checked. Meaning no need to recheck those values.

How do i do that?

many thanks,
Jeet

Re: checkedlistbox - save checked items for future run

Manas Bhardwaj10-Jun-09 3:51

Manas Bhardwaj

10-Jun-09 3:51

havejeet wrote:
How do i do that?

Store the checked items in a persistent store (database, file).
Read the stored values and load them when your form loads.

Manas Bhardwaj
Please remember to rate helpful or unhelpful answers, it lets us and people reading the forums know if our answers are any good.

Re: checkedlistbox - save checked items for future run

Rajesh R Subramanian10-Jun-09 4:01

Rajesh R Subramanian

10-Jun-09 4:01

You might use a file or the registry for storing your application settings.

It is a crappy thing, but it's life -^ Carlo Pallini

taking null instead of value

KIDYA10-Jun-09 3:01

KIDYA

10-Jun-09 3:01

Hello Experts!!

I am using following code inwhich instead of current value it takes null.I am using it at cell leave event of datagrid.

<pre>int ind = dataGridView1.CurrentRow.Index;
if (call == 1 ||call==2)
{
arr[x++] = (string)dataGridView1.Rows[ind].Cells[1].Value; //Error here
call++;
}

Re: taking null instead of value

Tom Deketelaere10-Jun-09 3:05

Tom Deketelaere

10-Jun-09 3:05

Let me turn my mind reader on...

trying to read error...
dense object detected...
error: can't read mind, shutting down now.

What error do you get?
What's the code supposed to do?
What does it do?
And what is your question?

Re: taking null instead of value

Colin Angus Mackay10-Jun-09 5:04

Colin Angus Mackay

10-Jun-09 5:04

KIDYA wrote:
current value

Define "current value" in the context of the code you have shown. There is nothing in the code called that. The nearest is "CurrentRow".

KIDYA wrote:
arr[x++] = (string)dataGridView1.Rows[ind].Cells[1].Value; //Error here

What sort of error? At a quick glance there are at least 8 possible points of failure on this line.

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

Re: taking null instead of value

KIDYA11-Jun-09 18:35

KIDYA

11-Jun-09 18:35

Sorry there!!

i am using above error code in cellchange event of datagridview,i have three columns namely srno.,cust no.,name when i entered value into cust no. then in cell change event of custno value must be shown into arr[x++].but it cant show.
What to do???

SQL Database is not saved after data inserted!!

Zohair8310-Jun-09 2:25

Zohair83

10-Jun-09 2:25

Hi there,

I'm building a windows application using Visual Studio 2005.
1- I built the GUI and the database table needed.
2- I biult a SQL table with the fields needed.
3- I used the VS2005 wizards to establish connection and to create the dataset and table adapter.
4- I added a gridView to the form bound to the defalut data source enerated by VS.
5- I added a button with this code inside the click method:
/////////////////////////////////////////////////////////////////////
surveyTableAdapter.Insert(q1.ToString(), q2.ToString(), q3.ToString(), q4.ToString(),
q5.ToString(), q6.ToString(), q7.ToString(), q8.ToString(), name.Text, email.Text,
phone.Text, address.Text, post.Text, comments.Text, mailList.Checked.ToString());

this.surveyTableAdapter.Fill(this.surveyDataSet.Survey);//this is to populate the gridview upon a click

MessageBox.Show("Thank you for your participation in this servey.");
/////////////////////////////////////////////////////////////////////
6- The problem is that when I click the button I see the changes in the gridview, but when the program is re-executed, nothing is found in the table.In other words, changes are not saved.

7- I built a MS-Access database and connected it to the GUI, but the same thing happened.

I want to reiterate that i'm using the default cod and settings of the VS2005.

Can anybody help me in that?

Thanks in advance.

Zohair

Re: SQL Database is not saved after data inserted!!

EliottA10-Jun-09 2:57

EliottA

10-Jun-09 2:57

EW!!!

Here's some help..

Zohair83 wrote:
MessageBox.Show("Thank you for your participation in this servey.");

servey = survey.

Check out the CodeProject forum Guidelines[^]

Re: SQL Database is not saved after data inserted!!

Zohair8310-Jun-09 3:26

Zohair83

10-Jun-09 3:26

cum onn.. this has nothing to do with the problem, it's a mistype, man! Wink | ;)

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