Searching SQLite3 DB in iPhone from input given in UITextfield - iphone

Question

I am fairly new to iOS development. I am trying to build application which searches given search term in sqllite3 DB. I am having trouble with binding parameter to that sql statement.Following is my code to read data from database.
-(void) readPlayersFromDatabase
{
NSString * strTemp=[[NSString alloc]init];
strTemp=#"ben";
sqlite3 *database;
players = [[NSMutableArray alloc] init];
if(sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK)
{
char *sqlStatement = "SELECT * FROM Player WHERE LENGTH (lastname)>0 AND LENGTH (firstname)>0 AND ( lastname LIKE '%?%' OR firstname LIKE'%?%' OR Height LIKE '%?%' OR Weight LIKE '%?%') ORDER BY lastname,firstname";
sqlite3_stmt *compiledStatement;
if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK)
{
sqlite3_bind_text(compiledStatement, 1, [strTemp UTF8String],-1, SQLITE_TRANSIENT );
sqlite3_bind_text(compiledStatement, 2, [strTemp UTF8String],-1, SQLITE_TRANSIENT );
sqlite3_bind_text(compiledStatement, 3, [strTemp UTF8String],-1, SQLITE_TRANSIENT );
sqlite3_bind_text(compiledStatement, 4, [strTemp UTF8String],-1, SQLITE_TRANSIENT );
while(sqlite3_step(compiledStatement) == SQLITE_ROW)
{
NSString *playerId = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)];
NSString *playerName = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)];
Player *temp = [[Player alloc] initWithID:playerId name:playerName];
[players addObject:temp];
[temp release];
}
}
sqlite3_finalize(compiledStatement);
}
sqlite3_close(database);
}
All I am getting at the end is name of player which has ? in their name. Can anyone help me out here. Can you also tell me how can I connect UITextfield input to the strTemp in above code ?
Thanks.

Answer 1

What do you want to do exactly? You can send as a parameter to your readPlayersFromDatabase method to your UITextfield input.
Here is my method to select command: I had a class which is called DBOperations. I hope that helps
+ (int) getUserID{
//check DB
if (![DBOperations checkDB])
{
NSString *msgAlert = #"can not access db file.";
UIAlertView *alert = [[UIAlertView alloc] initWithTitle: #"Connection error" message:msgAlert
delegate:self cancelButtonTitle:#"Ok" otherButtonTitles: nil];
[alert show];
[alert release];
return 0;
}
[DBOperations open];
int _userID = 1;
const char* sql = " select id from Oyuncu ORDER BY id desc";
if (sqlite3_prepare_v2(database, sql, -1, &hydrate_statement, NULL) != SQLITE_OK) {
NSAssert1(0, #"Error: failed to prepare statement with message '%s'.", sqlite3_errmsg(database));
}
if (sqlite3_step(hydrate_statement)==SQLITE_ROW)
{
_userID= sqlite3_column_int(hydrate_statement,0);
NSLog(#"%d",_userID);
}
// Execute the query.
sqlite3_finalize(hydrate_statement);
return _userID;
[DBOperations close];
}
+(BOOL) checkDB {
NSError *error;
NSFileManager *fileManager = [NSFileManager defaultManager];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
NSString *writableDBPath = [documentsDirectory stringByAppendingPathComponent:#"dbOyun.db"];
BOOL success = [fileManager fileExistsAtPath:writableDBPath];
success = [fileManager fileExistsAtPath:writableDBPath];
if (success) return true;
NSString *defaultDBPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:#"dbOyun.db"];
success = [fileManager copyItemAtPath:defaultDBPath toPath:writableDBPath error:&error];
return success;
}
+ (void) open{
//check db validity
NSString *dbPath;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
dbPath = [documentsDirectory stringByAppendingPathComponent:#"dbOyun.db"];
if (sqlite3_open([dbPath UTF8String], &database) != SQLITE_OK) {
sqlite3_close(database);
NSAssert1(0, #"Failed to open database with message '%s'.", sqlite3_errmsg(database));
}
}