From ea318d1431c89e647598c510c4245c6571aa5f46 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Thu, 26 Jan 2012 23:32:43 -0600 Subject: Update to latest tqt3 automated conversion --- doc/html/qsqlfield.html | 216 ------------------------------------------------ 1 file changed, 216 deletions(-) delete mode 100644 doc/html/qsqlfield.html (limited to 'doc/html/qsqlfield.html') diff --git a/doc/html/qsqlfield.html b/doc/html/qsqlfield.html deleted file mode 100644 index fc2cdb2d..00000000 --- a/doc/html/qsqlfield.html +++ /dev/null @@ -1,216 +0,0 @@ - - - - - -TQSqlField Class - - - - - - - -

TQSqlField Class Reference
[sql module]

- -

The TQSqlField class manipulates the fields in SQL database tables -and views. -More... -

#include <qsqlfield.h> -

List of all member functions. -

Public Members

TQSqlField ( const TQString & fieldName = TQString::null, TQVariant::Type type = TQVariant::Invalid )
TQSqlField ( const TQSqlField & other )
TQSqlField & operator= ( const TQSqlField & other )
bool operator== ( const TQSqlField & other ) const
virtual ~TQSqlField ()
virtual void setValue ( const TQVariant & value )
virtual TQVariant value () const
virtual void setName ( const TQString & name )
TQString name () const
virtual void setNull ()
bool isNull () const
virtual void setReadOnly ( bool readOnly )
bool isReadOnly () const
void clear ( bool nullify = TRUE )
TQVariant::Type type () const

Detailed Description

- - -The TQSqlField class manipulates the fields in SQL database tables -and views. -

- -

TQSqlField represents the characteristics of a single column in a -database table or view, such as the data type and column name. A -field also contains the value of the database column, which can be -viewed or changed. -

Field data values are stored as TQVariants. Using an incompatible -type is not permitted. For example: -

-    TQSqlField f( "myfield", TQVariant::Int );
-    f.setValue( TQPixmap() );  // will not work
-

- -

However, the field will attempt to cast certain data types to the -field data type where possible: -

-    TQSqlField f( "myfield", TQVariant::Int );
-    f.setValue( TQString("123") ); // casts TQString to int
-

- -

TQSqlField objects are rarely created explicitly in application -code. They are usually accessed indirectly through TQSqlRecord -or TQSqlCursor which already contain a list of fields. For -example: -

-    TQSqlCursor cur( "Employee" );        // create cursor using the 'Employee' table
-    TQSqlField* f = cur.field( "name" );  // use the 'name' field
-    f->setValue( "Dave" );               // set field value
-    ...
-

- -

In practice we rarely need to extract a pointer to a field at all. -The previous example would normally be written: -

-    TQSqlCursor cur( "Employee" );
-    cur.setValue( "name", "Dave" );
-    ...
-

- -

Member Function Documentation

TQSqlField::TQSqlField ( const TQString & fieldName = TQString::null, TQVariant::Type type = TQVariant::Invalid ) -

-Constructs an empty field called fieldName of type type. - -

TQSqlField::TQSqlField ( const TQSqlField & other ) -

-Constructs a copy of other. - -

TQSqlField::~TQSqlField () `[virtual]` -

-Destroys the object and frees any allocated resources. - -

void TQSqlField::clear ( bool nullify = TRUE ) -

-Clears the value of the field. If the field is read-only, nothing -happens. If nullify is TRUE (the default), the field is set to -NULL. - -

bool TQSqlField::isNull () const -

- -

Returns TRUE if the field is currently NULL; otherwise returns -FALSE. - -

bool TQSqlField::isReadOnly () const -

- -

Returns TRUE if the field's value is read only; otherwise returns -FALSE. - -

TQString TQSqlField::name () const -

- -

Returns the name of the field. - -

Example: sql/overview/table4/main.cpp. -

TQSqlField & TQSqlField::operator= ( const TQSqlField & other ) -

-Sets the field equal to other. - -

bool TQSqlField::operator== ( const TQSqlField & other ) const -

-Returns TRUE if the field is equal to other; otherwise returns -FALSE. Fields are considered equal when the following field -properties are the same: -

name() -
isNull() -
value() -
isReadOnly() -

void TQSqlField::setName ( const TQString & name ) `[virtual]` -

- -

Sets the name of the field to name. - -

void TQSqlField::setNull () `[virtual]` -

- -

Sets the field to NULL and clears the value using clear(). If the -field is read-only, nothing happens. -

void TQSqlField::setReadOnly ( bool readOnly ) `[virtual]` -

- -

Sets the read only flag of the field's value to readOnly. -

void TQSqlField::setValue ( const TQVariant & value ) `[virtual]` -

-Sets the value of the field to value. If the field is read-only -(isReadOnly() returns TRUE), nothing happens. If the data type of -value differs from the field's current data type, an attempt is -made to cast it to the proper type. This preserves the data type -of the field in the case of assignment, e.g. a TQString to an -integer data type. For example: -

-    TQSqlCursor cur( "Employee" );                 // 'Employee' table
-    TQSqlField* f = cur.field( "student_count" );  // an integer field
-    ...
-    f->setValue( myLineEdit->text() );            // cast the line edit text to an integer
-

- -

TQVariant::Type TQSqlField::type () const -

- -

Returns the field's type as stored in the database. -Note that the actual value might have a different type, -Numerical values that are too large to store in a long -int or double are usually stored as strings to prevent -precision loss. - -

TQVariant TQSqlField::value () const `[virtual]` -

- -

Returns the value of the field as a TQVariant. - -

Example: sql/overview/table4/main.cpp. - -

- -

Trademarks -

TQt 3.3.8

- -- cgit v1.2.1

TQSqlField Class Reference[sql module]