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i've used the wizzard to add class derived from CRecordset for an access table (let's say CRSmytable).
i get "Too few parameters. Expected 3" exception thrown by CRSmytable.Open().
Any ideea why? Or, at least..what does this exception mean?
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The exception means what it says. You are passing fewer parameters to the function CRecordSet::Open() than what it expects. BTW Can you post the code?
Nobody can give you wiser advice than yourself. - Cicero
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i'm not passing any arguments..
The constructor of the recordset recieves a pointer to the opend connection to the database. From what i know, it should do a "select * from table"...
the code:
CRSLoads line(&pApp->db);
line.Open();
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And if you set parameters for it what happens?
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eusto wrote: Too few parameters. Expected 3
You are passing less parameter's to the function where you are calling it.See if you are missing out on passing some parameter values to the function.
Somethings seem HARD to do, until we know how to do them.
 _AnShUmAn_
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CRecordset::Open() with no params should work..it works with firebird and mysql. It actually works with other tables in the access db that i use except this one  I don't get it
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I'll reply to my own post so maybe someone would benefit from it
The error was caused by the class wizzard wich inserted some columns that did not belong to that table. 3 of them
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It means there is a discrepency between the number of columns being retrieved with the SELECT statement and the number of variables in the record set. Everything must match!
I would also suggest setting a breakpoint within CRecordset::Open() and single-stepping through that method so you'll know exactly what is going on. Until you can narrow an exception or an assertion down to the actual line, you're just guessing.
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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Thanks i've solved it. It was exactly what you've said. I'm not used to access, i usually had a sql server behind my applications. The problem was between keyboard and my chair. I've generated the recordset from one db file and was running the program on another one.
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As we can reallocate memory to the memory which was allocated withe calloc() function,using realloc()
How can we reallocate memeory for the memory which was allocated using new operator.
KIRAN PINJARLA
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no way with new/delete.
BTW, what are you trying to achieve ?
if you're coding a container like a linked list, have you thought to use the STL ?
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It doesn't work that way in C++. You have to write your own function to reallocate memory that's allocated with new, or you can use STL. (ie, vector)
std::vector<>::resize()
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Thank You.
i want a to create a unsigned char * buffer whose size will be growing at runtime. For that i want to use vector<>.
how to use it for this?
first i want a BYTE* buffer[1000]; and at runtime everytime its size will be increased to 1000 and buffer of size 1000 should be appended to that buffer.
how this can be done using vector<>.
KIRAN PINJARLA
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kiran.pinjarla wrote: first i want a BYTE* buffer[1000]; and at runtime everytime its size will be increased to 1000 and buffer of size 1000 should be appended to that buffer.
how this can be done using vector<>.
Is this what you want? Not sure if that's what you're asking though.
<br />
const int DEFAULT_SIZE = 1000;<br />
vector< unsigned char * > buffer(DEFAULT_SIZE);<br />
<br />
cout << "Before resize: " << buffer.size() << endl;<br />
<br />
buffer.resize(DEFAULT_SIZE + 1000);<br />
<br />
cout << "After resize: " << buffer.size() << endl;<br />
Before resize: 1000
After resize: 2000
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It's also worth noting that if you need the pointer to the beginning of your buffer, you can use
BYTE* pBuffer = &buffer[0]; // address of the first element of the vec
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Link2006 wrote:
buffer.resize(DEFAULT_SIZE + 1000);
cout << "After resize: " << buffer.size() << endl;
sorry, but little problem.. you cannot get the string as a whole.. it every charcter has it unique character...
better you have unsigned char instead it's pointer!
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief And you
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Then I would write my own append function instead of using vector.
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Link2006 wrote:Then I would write my own append function instead of using vector.
Instead of that you can write your own string function.. which i believe much easier to write!
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
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kiran.pinjarla wrote: How can we reallocate memeory for the memory which was allocated using new operator.
You can't, and for good reason.
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15
"Judge not by the eye but by the heart." - Native American Proverb
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Hi yaar,
I have an problem "Automation Error " with MTS COM+ while creating an package using VB. Following is the code snippet.
CompUtil.InstallComponent fld.Path & "\" & File1.Name, "", ""
please give me a solution ASAP.
You only have to do a very few things right in your life so long as you don't do too many things wrong.
Vivek.S
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I am very much confused as anyone else who read your post.
BTW, heres some help which you didn't ask us, but which you are in need of.
vivek.s.vivek wrote: I have an problem......creating an package
Where to use AN[^]
Nobody can give you wiser advice than yourself. - Cicero
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Hi yaar,
I have an problem with MTS COM+ while creating an
package using VB. Following is the snippet.
CompUtil.InstallComponent fld.Path & "\" & File1.Name, "", ""
please give me a solution
You only have to do a very few things right in your life so long as you don't do too many things wrong.
Vivek.S
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Hi
How can I populate my treeView with data from access database
thanks
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This[^] msdn sample does something similar...
Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_
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Hi All,
Say if i'm allocating memory using 'new' operator.
Without deleting the alloacated memory, my application exits.
Now is it a memory leak??
I hope its not.. comments please ..
Do your Duty and Don't expect the Result
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