Cannot perform '=' operation on System.Char and System.Boolean. exception - C# Discussion Boards

Re: object typeconversion syntax error

Keith Barrow28-Aug-09 0:46

Keith Barrow

28-Aug-09 0:46

Try

((TextBox)(GridView2.Rows[0].Cells [2])).Text = "a"; Smile | :)

Need BHO Solutions

Jacobb Michael27-Aug-09 23:49

Jacobb Michael

27-Aug-09 23:49

Hi all,

Through IHTMLElementCollection we can get all the IHTMLElement.

I want to find out all the HTMLInputButtonElement that is in the current DOM.

How to navigate (frames,iframes,divs,tables) and find out the HTMLInputButtonElement

Is there any common algorithm.

Thanks in advance

How to Accept password in ** format during installation.

RA|-|UL PATEL27-Aug-09 21:56

RA|-|UL PATEL

27-Aug-09 21:56

I have created setup in C#.net using C# setup project.
I am Accepting servername,username,password in textbox.
Textbox has been added in setup project by adding textbox dialog in user interface..

but how to Accept Password in ** format during installation.??
Thanks in advance.
Smile | :)

Re: How to Accept password in ** format during installation.

OriginalGriff27-Aug-09 22:02

OriginalGriff

27-Aug-09 22:02

Try:
Password Textbox[^]

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Re: How to Accept password in ** format during installation.

RA|-|UL PATEL27-Aug-09 23:04

RA|-|UL PATEL

27-Aug-09 23:04

Thanks dear.
For your valuable suggetion.

But for installation time textbox there is no such property exist.
This textbox is textbox dialog box which is provided in .net in set up project.

Re: How to Accept password in ** format during installation.

OriginalGriff27-Aug-09 23:46

OriginalGriff

27-Aug-09 23:46

Then what you have to do is provide a Custom Action[^] which should allow your own dialog.

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Re: How to Accept password in ** format during installation.

Manas Bhardwaj28-Aug-09 0:31

Manas Bhardwaj

28-Aug-09 0:31

Apart from this you will need to use the Orca [^]utility to change the textual style of textbox.

Manas Bhardwaj
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Cannot perform '=' operation on System.Char and System.Boolean. exception

acroitoriu27-Aug-09 21:41

acroitoriu

27-Aug-09 21:41

Hi all,

I am developing a winforms application and, in order to store some data on the client side I am using a dataset. My problem is that for a particular table (nothing different in settings compared to other datatables in my dataset), I get an exception when I try to insert a new Row.
I will not paste any code in here as I don't think that it will help anyone, but what I do is:

* create new row object using: MyDataSet.MyDatatableRow row = datasetInstance.MyDataTable.NewMyDataTableRow();
* I populate the columns I need
* I try to add the row to the datatable: datasetInstance.MyDataTable.AddMyDataTableRow(row);

At the very last step (add to datatable), I get an exception saying: "Cannot perform '=' operation on System.Char and System.Boolean."
I tried to see if I am doing something wrong while setting the column value, but everything looks fine... also I already waste lots of time on google trying to find an answer, but no success.

Can anyone explain to me why this exeption occurs? Any idea what could be wrong, what should I try in order to fix this?

Thank you in advance!

Andrei

Re: Cannot perform '=' operation on System.Char and System.Boolean. exception

Vimalsoft(Pty) Ltd27-Aug-09 22:10

Vimalsoft(Pty) Ltd

27-Aug-09 22:10

Can we see the code ?

Vuyiswa Maseko,

Few companies that installed computers to reduce the employment of clerks have realized their expectations.... They now need more and more expensive clerks even though they call them "Developers" or "Programmers."

C#/VB.NET/ASP.NET/SQL7/2000/2005/2008
http://www.vuyiswamaseko.com
vuyiswa@its.co.za
http://www.itsabacus.co.za/itsabacus/

Re: Cannot perform '=' operation on System.Char and System.Boolean. exception

acroitoriu27-Aug-09 22:30

acroitoriu

27-Aug-09 22:30

To be honest, I don't see how this will help. Besides the code (which is quite long as there is business logic), I should paste also the datatable structure. Anyway, I have similar logic with many other datatables in the dataset, and I didn't get this exception so far. If you think that this is related to the way I populate the data, I will try to prepare the copy of my code and maybe a description of the datatable structure in case you think it will help.

Re: Cannot perform '=' operation on System.Char and System.Boolean. exception

DaveyM6927-Aug-09 23:08

DaveyM69

27-Aug-09 23:08

Well most likely, you are trying to store a boolean value in a field that takes char. Without code or a crystal ball I don't see how we can offer any more help. Just post the relavent bits (in <pre></pre> tags). Stripping out some of the chaff and validation/business logic will not only make it readable, but you might see where the problem lies.

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)

Re: Cannot perform '=' operation on System.Char and System.Boolean. exception

Luc Pattyn28-Aug-09 0:36

Luc Pattyn

28-Aug-09 0:36

Someone has to check the code, if you don't, and you don't publish any, who will?

here is a twin suggestion:
- exceptions most often contain file name, line number and method name information; to see it all, make sure you output Exception.ToString() and not just Exception.Message
- your IDE is capable of showing line numbers in all editor windows; make sure to switch that on. For Visual Studio, see here[^].

Smile | :)

Luc Pattyn

Badger | [badger,badger,badger,badger...]

Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.

Re: Cannot perform '=' operation on System.Char and System.Boolean. exception

acroitoriu28-Aug-09 0:56

acroitoriu

28-Aug-09 0:56

... thanks for the tips Smile | :)

I use them for a few years now + log4net to print exception. However, it's the first time when I get this exception - EVER! As soon as I will get 10-15 minutes free I will strip the code of business logic and post it here.

Re: Cannot perform '=' operation on System.Char and System.Boolean. exception

Luc Pattyn28-Aug-09 1:28

Luc Pattyn

28-Aug-09 1:28

so you know what line is failing Confused | :confused:

Luc Pattyn

Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.

Re: Cannot perform '=' operation on System.Char and System.Boolean. exception

acroitoriu28-Aug-09 1:33

acroitoriu

28-Aug-09 1:33

Yes, as I initially mention, the exception occurs when the AddMyDataTableRow method is called. When I say AddMyDataTableRow I mean the datatable specific method that is generated for every datatable to add new row: AddxxxRow

Re: Cannot perform '=' operation on System.Char and System.Boolean. exception

acroitoriu30-Aug-09 3:06

acroitoriu

30-Aug-09 3:06

OK, problem fixed. By some stupid mistake a field was defined as char in the datatable, but it was used as boolean in an expression. After fixing this issue everything worked fine.

messagbox

sanforjackass27-Aug-09 20:19

sanforjackass

27-Aug-09 20:19

how can i make the the font of text in messagbox as i want?

Re: messagbox

stancrm27-Aug-09 21:04

stancrm

27-Aug-09 21:04

MessageBoxManager - A Windows Forms component that provides enhanced MessageBox functionality[^]

Re: messagbox

sanforjackass28-Aug-09 0:30

sanforjackass

28-Aug-09 0:30

i want it in c#

Re: messagbox

stancrm28-Aug-09 0:35

stancrm

28-Aug-09 0:35

That is in C#

Re: messagbox

EliottA28-Aug-09 2:37

EliottA

28-Aug-09 2:37

Ha.

Check out the CodeProject forum Guidelines[^]
The original soapbox 1.0 is back![^]

Re: messagbox

Luc Pattyn28-Aug-09 0:38

Luc Pattyn

28-Aug-09 0:38

if you're not satisfied by some simple component, such as MessageBox, roll your own. It ain't hard at all. It is easier than getting it to do what you want against it's own will.

Smile | :)

Luc Pattyn

Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.

How to Scale an image to its real world size

jamesjk27-Aug-09 20:11

jamesjk

27-Aug-09 20:11

Hi,

I have images of human body parts. Is it possible to view the image at its actual real world size.

How can I achieve this ?
How do I confirm whether current size of the image is same as its real world size?

Thanks in advance for all the help & suggestions.....

Re: How to Scale an image to its real world size

stancrm27-Aug-09 21:01

stancrm

27-Aug-09 21:01

You must get the DPI. For example the picture has 96dpi and the size is 1024x768 pixel.

1024/96 -> 10.67 inch
768/96 -> 8 inch

That means : the print size is 10.67 x 8 inch

Re: How to Scale an image to its real world size

jamesjk27-Aug-09 21:49

jamesjk

27-Aug-09 21:49

thanks stancrm,

will this ensure that the image, say that of a knee will be exactly of the same size of the person's knee whose knee was pictured ?

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