How to insert values using sqlite in iphone - iphone

Question

i am trying to insert values.But values are not saved.This is my coding.i alredy created the database using sqlite manager.That database name is "feedback.sqlite". If i run the code no errors will be displayed.But if i entered the data then click the save button the data will not be saved.if i run the code "Failed to open/create database" message will be displayed on the simulator.i cant guess where the error is.please give me an idea.thanks in advance.
Ratingviewcontroller.h
#interface RatingViewController : UIViewController <UITextFieldDelegate> {
sqlite3 *contactDB;
IBOutlet UITextField *Traineeid;
IBOutlet UITextField *Trainername;
IBOutlet UITextField *Traineename;
IBOutlet UITextField *Rating;
IBOutlet UILabel *status;
NSString *dbpath;
}
#property(nonatomic, retain) UITextField *Traineeid;
#property(nonatomic, retain) UITextField *Trainername;
#property(nonatomic, retain) UITextField *Traineename;
#property(nonatomic, retain) UITextField *Rating;
#property(nonatomic, retain) UILabel *status;
- (IBAction)saveData:(id)sender;
- (IBAction)findData:(id)sender;
#end
Ratingviewcontroller.m
#implementation RatingViewController
- (void)viewDidLoad {
// Do any additional setup after loading the view, typically from a nib.
NSString *docsDir;
NSArray *dirPaths;
// get the document directory
dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory,
NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
// Build the path to the database file
dbpath = [[NSString alloc] initWithString:
[docsDir stringByAppendingPathComponent:#"feedback.sqlite"]];
NSFileManager *filemgr = [NSFileManager defaultManager];
if ([filemgr fileExistsAtPath:dbpath] == NO) {
const char *db = [dbpath UTF8String];
if (sqlite3_open(db, &contactDB) == SQLITE_OK) {
char *errMsg;
const char *sql_stmt =
"CREATE TABLE IF NOT EXISTS CONTACTS (Traineeid INTEGER "
"PRIMARY KEY AUTOINCREMENT, Trainername TEXT, Traineename "
"TEXT, Rating float)";
if (sqlite3_exec(contactDB, sql_stmt, NULL, NULL, &errMsg) !=
SQLITE_OK) {
status.text = #"Failed to create table";
}
sqlite3_close(contactDB);
} else {
status.text = #"Failed to open/create database";
}
}
[super viewDidLoad];
}
- (void)saveData:(id)sender {
sqlite3_stmt *statement;
const char *database = [dbpath UTF8String];
if (sqlite3_open(database, &contactDB) == SQLITE_OK) {
NSString *insertSQL =
[NSString stringWithFormat:
#"INSERT INTO CONTACTS (Trainee id, Trainer name, Trainee "
"name,Rating) VALUES (\"%#\",\"%#\", \"%#\", \"%#\")",
Traineeid, Trainername.text, Trainername.text, Rating.text];
/* NSString *insertSQL = [NSString stringWithFormat:#"insert into
CONTACTS
(Traineeid,Trainername,Traineename,Rating) values
(\"%d\",\"%#\", \"%#\",
\"%f\")",[Traineeid integerValue],
Trainername, Traineename,[Rating
float]];*/
const char *insert_stmt = [insertSQL UTF8String];
sqlite3_prepare_v2(contactDB, insert_stmt, -1, &statement, NULL);
if (sqlite3_step(statement) == SQLITE_DONE) {
status.text = #"Contact added";
Traineeid.text = #"";
Trainername.text = #"";
Traineename.text = #"";
Rating.text = #"";
} else {
status.text = #"Failed to add contact";
}
sqlite3_finalize(statement);
sqlite3_close(contactDB);
}
}
- (void)findContact {
const char *datapath = [dbpath UTF8String];
sqlite3_stmt *statement;
if (sqlite3_open(datapath, &contactDB) == SQLITE_OK) {
NSString *querySQL = [NSString stringWithFormat:
#"select Trainer name,Trainee name,Rating "
"from CONTACT where Traineeid=\"%#\"",
Traineeid];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(contactDB, query_stmt, -1, &statement, NULL) ==
SQLITE_OK) {
if (sqlite3_step(statement) == SQLITE_ROW) {
NSString *trainid = [[NSString alloc] initWithUTF8String:
(const char *)sqlite3_column_text(statement, 0)];
Traineeid.text = trainid;
NSString *trainernme = [[NSString alloc] initWithUTF8String:
(const char *)sqlite3_column_text(statement, 1)];
Trainername.text = trainernme;
NSString *traineenme = [[NSString alloc] initWithUTF8String:
(const char *)sqlite3_column_text(statement, 2)];
Traineename.text = traineenme;
NSString *rat = [[NSString alloc] initWithUTF8String:
(const char *)sqlite3_column_text(statement, 3)];
Rating.text = rat;
status.text = #"Match found";
} else {
status.text = #"Match not found";
Traineeid.text = #"";
Trainername.text = #"";
Traineename.text = #"";
Rating.text = #"";
}
sqlite3_finalize(statement);
}
sqlite3_close(contactDB);
}
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
[textField resignFirstResponder];
return YES;
}
#end

Answer 1

try this code and also you already created the database using sqlite manager.Thats why there is no need to create the insert the values.
- (void)viewDidLoad {
if ([filemgr fileExistsAtPath:dbpath]) {
const char *db = [dbpath UTF8String];
if (sqlite3_open(db, &contactDB) == SQLITE_OK) {
char *errMsg;
const char *sql_stmt =
"CREATE TABLE IF NOT EXISTS CONTACTS (Traineeid INTEGER "
"PRIMARY KEY AUTOINCREMENT, Trainername TEXT, Traineename "
"TEXT, Rating float)";
if (sqlite3_exec(contactDB, sql_stmt, NULL, NULL, &errMsg) !=
SQLITE_OK) {
status.text = #"Failed to create table";
}
sqlite3_close(contactDB);
} else {
status.text = #"Failed to open/create database";
}
}
[super viewDidLoad];
}