write in a text file

[RobertoBozzolo]

You can look at fpeditor.prj sample located in <cvidir>\samples\apps\fpeditor: BrowseForFile function is exactly what you need, a callback function that uses FileSelectPopup to locate a file on disk.

Note, however, that FileSelectPopup function DOES NOT do anything on the selected file: it is aimed to returning the pathname of the file, leaving to you the responsibility to operate on it.

[nadster]

ok ...well..i bascially want to do this,

I want to generate a report file everytime i run the code...and i want to store this report file in one directory only.

What comman do i use....

isn't fH=Openfile (etc...) going to dump all that code into just one place...every single time?

i want to generate new report files like report1.csv
report2.csv
report3.csv

say in a folder that has path as C:\Project\FIles\Data\

why is this that hard to implement?it's pretty straightforward i think

[nadster]

i've been trying to modify some code that there's been generated in this program

-------------------------------------------------------------------------------------------------------------------------
static void getRecommendedReportName(char reportFileName[], char reportPath[],
        char reportPathName[]) {

    char selectedStudyFile[MAX_PATHNAME_LEN];
    char driveName[MAX_PATHNAME_LEN];
    char dirName[MAX_PATHNAME_LEN];
    char fileName[MAX_PATHNAME_LEN];
    char temp[MAX_PATHNAME_LEN];
   
    /* this gets us the complete path and name to the selected study file */
//    (void) GetCtrlVal (panelHdl, PNL_REPORT_STR_STUDY_FILE_PATH,
//                               selectedStudyFile);  --------------->//i've commented this because it gave an error...the machine generated code said the PNL_REPORT_etc etc is an undeclared  //Identifier...it's something that's generated in a machine code .h file..i have a feeling this might be causing the error in reading the input file name.
 
           
    SplitPath (selectedStudyFile, driveName, dirName, fileName);
           
    /* extract just the name without extension */
    (void) Scan(fileName, "%s>%s[t46xq]", temp);
           
    /* add REPORT_FILE_SUFFIX to it to generate the suggested name */
    (void) Fmt(reportFileName, "%s[qw*]<%s%s", MAX_PATHNAME_LEN -1, temp,
            REPORT_FILE_SUFFIX);           
    /* construct the complete path to the selected report dir */
    (void) Fmt(reportPath, "%s[qw*]<%s%s", MAX_PATHNAME_LEN -1, driveName,
            dirName);
    /* the complete path name of the recommended report file */
    (void) Fmt(reportPathName, "%s[qw*]<%s%s", MAX_PATHNAME_LEN -1,reportPath,
            reportFileName);
           
    return;

}

is there basically a simpler way to get the filename,the path and plug it into this part of the code

------------------------------------------------------------------------------------------------------------SUPPRESS(715)  /* Standard CVI Callback method signature */
SUPPRESS(818)  /* Standard CVI Callback method signature */
int CVICALLBACK cmdSelectReportCB (int panel, int control, int event,
        void *callbackData, int eventData1, int eventData2) {

    int statusCode = AMI_ERROR;  
    char selectedFile[MAX_PATHNAME_LEN];
    char reportPathName[MAX_PATHNAME_LEN];
    char reportFileName[MAX_PATHNAME_LEN];
    char reportPath[MAX_PATHNAME_LEN]=REPORT_PATH;
   

    switch (event) {
        case EVENT_COMMIT:
       
            getRecommendedReportName(reportFileName, reportPath, reportPathName);            
       
            //statusCode = FileSelectPopup (reportPath, reportFileName,
            //        STUDY_FILENAME_EXT, "Select Report File", VAL_SAVE_BUTTON,
            //        FALSE, FALSE, TRUE, FALSE, selectedFile);
       
   
       
        statusCode = FileSelectPopup (reportPath, reportFileName,
                    STUDY_FILENAME_EXT1, "Select Report File", VAL_SAVE_BUTTON,
                    FALSE, FALSE, TRUE, FALSE, selectedFile);
           
            if (statusCode != VAL_NO_FILE_SELECTED) {                                       
                                                                                            
                (void) SetCtrlVal (panelHdl, PNL_REPORT_STR_REPOR_FILE_PATH,
                        selectedFile);
                                                                 
            }    
           
            break;
           
        default:

            break;
    }
    return 0;
}
--------------------------------------------------------------------------------------------------------------------

i'd like you to kindly send me an email regarding this...my email is abhayvnadkarni@yahoo.com

thanks a lot roberto

[nadster]

isthere anyonethat can help me with the previous code fragment?

[RobertoBozzolo]

nadster, take a look at the sample project attached. It:

• permits the user to choose output directory via DirSelectPopup function
• Scans the directory to search for existing files with a given pattern (TempData*.dat)
• Generates a new filename with the first free index
• writes the desired number of rows with "random" data

File I/O error checking is missing in the source code. I wrote some notes on error checking procedures that you can find here: you may find them useful while developing your error checking strategy.

Message Edited by Roberto Bozzolo on 02-21-2007 05:32 PM

[nadster]

oh cool..thanks so much...i was also wondering about one more thing...is there any way to time stamp the out file name as in suppose i want the output file name by default to look like


*2-21-2007_13:20.csv  (i.e. *date_time.csv)

[RobertoBozzolo]

It seems not so difficult to build the file name using date and time ...

Just look at my sample and modify it as you want!

[nadster]

Well..i wasn't saying with refrence to your source...i was trying to use FileSelectPopup and return the file with the path...

here's what i'm doing...
switch (event) {
        case EVENT_COMMIT:
       
      statusCode = FileSelectPopup (reportPath,"*.csv", STUDY_FILENAME_EXT1, "Select Report File", VAL_SAVE_BUTTON,
                    FALSE, FALSE, TRUE, TRUE, selectedFile);
           
            if (statusCode != VAL_NO_FILE_SELECTED) {
               
        //create the file name      
        sprintf(selectedFile,"CO %s_%s", DateStr(),TimeStr());
                (void) SetCtrlVal (panelHdl, PNL_REPORT_STR_REPOR_FILE_PATH,
                        selectedFile);
   
                MakePathname (reportPath,selectedFile,selectedFile);
                               }

so i basically want to timestamp the file that i choose by using MakePathname...it doesn't  seem to be working ... selectedFile is then got back via GetCtrlVal and is opened up to be written into...

[nadster]

so it doesn't append the filename to the required directory specified by reportPath

that's the problem...it just  shows the sprintf argument without the pathname as a prefix...so it just doesn't save the file anywhere since the files not specified in any path...

the MakePathName should append selectedFile to the directory specified by reportPath...but it doesn't seem to work...

[RobertoBozzolo]

It may happen that DateStr and TimeStr introduce in the pathname illegal caracthers: for example in a filename it's surey illegal the ":" separator included in hour string.

Anyway, you sould be able to obtain your filename. Is makePathname returning any error? Can you set a breakpoint on this function and verify the values passed to the it?