optiongrp.asp

网上商城的设计与实现

<SCRIPT RUNAT=SERVER LANGUAGE="JavaScript">
// ************************************************************************ 
// Microsoft Script Library 
// Visual InterDev 6.0 OptionGroup Object for ASP
//
// Copyright 1998 Microsoft Corporation. All Rights Reserved.
// ************************************************************************ 	
function CreateOptionGroup(strName,funcInit,objParent)
{	
	if (typeof(strName) == 'string' && strName != '')
	{
		var objOptionGroup = new _OptionGroup(strName);
		eval(strName + " = objOptionGroup;");
		objOptionGroup._funcInit = funcInit;
		thisPage.advise(PAGE_ONINIT,strName + '._restoreState()');
		return objOptionGroup;
	}	
	@if (@trace_warnings)
		thisPage._traceWarning('Err 428: Invalid argument [strName].  Must provide a valid string.','optiongrp.asp','CreateOptionGroup(strName)');
	@end
	return null;
}

function _OptionGroup(strName)
{	
	if (typeof(_bOPTPrototypeCalled) == 'undefined')
		_OPT__Prototype();

	// public members
	this.id = strName;
	this.name = strName;

	// private members
	this._options = new Array();
	this._objEventManager = CreateEventManager();
	this._objEventManager.adviseDefaultHandler(this.name,OPT_ONCHANGE);
}

function _OPT__Prototype()
{	
	_bOPTPrototypeCalled = 1;
	
	//events
	OPT_ONCHANGE = 'onchange';

	// public members
	_OptionGroup.prototype.maintainState = true;
	
	// private members
	_OptionGroup.prototype._bVisible = true;
	_OptionGroup.prototype._nBorder = 0;
	_OptionGroup.prototype._nAlignment = 0;
	_OptionGroup.prototype._selectedIndex = 0;
	_OptionGroup.prototype._objDataSource = null;
	_OptionGroup.prototype._strDataField = '';
	
	//public methods
	_OptionGroup.prototype.isVisible = _OPT_isVisible;
	_OptionGroup.prototype.show = _OPT_show;
	_OptionGroup.prototype.hide = _OPT_hide;
	_OptionGroup.prototype.getBorder = _OPT_getBorder;
	_OptionGroup.prototype.setBorder = _OPT_setBorder;
	_OptionGroup.prototype.getAlignment = _OPT_getAlignment;
	_OptionGroup.prototype.setAlignment = _OPT_setAlignment;
	_OptionGroup.prototype.getButton = _OPT_getButton;
	_OptionGroup.prototype.addItem = _OPT_addItem;
	_OptionGroup.prototype.removeItem = _OPT_removeItem;
	_OptionGroup.prototype.clear = _OPT_clear;
	_OptionGroup.prototype.getCount = _OPT_getCount;
	_OptionGroup.prototype.getValue = _OPT_getValue;
	_OptionGroup.prototype.setValue = _OPT_setValue;
	_OptionGroup.prototype.getCaption = _OPT_getCaption;
	_OptionGroup.prototype.setCaption = _OPT_setCaption;
	_OptionGroup.prototype.selectByValue = _OPT_selectByValue;
	_OptionGroup.prototype.selectByCaption = _OPT_selectByCaption;
	_OptionGroup.prototype.selectByIndex = _OPT_selectByIndex;
	_OptionGroup.prototype.getSelectedIndex = _OPT_getSelectedIndex;
	_OptionGroup.prototype.getRowSource = _OPT_getRowSource
	_OptionGroup.prototype.setRowSource = _OPT_setRowSource
	_OptionGroup.prototype.getDataSource = _SOM_getDataSource;
	_OptionGroup.prototype.setDataSource = _SOM_setDataSource;
	_OptionGroup.prototype.getDataField = _SOM_getDataField;
	_OptionGroup.prototype.setDataField = _SOM_setDataField;
	_OptionGroup.prototype.advise = _OPT_advise;
	_OptionGroup.prototype.unadvise = _OPT_unadvise;
	_OptionGroup.prototype.display = _OPT_display;

	//private methods
	_OptionGroup.prototype._fireEvent = _EM__fireEvent;
	_OptionGroup.prototype._preserveState = _OPT__preserveState;
	_OptionGroup.prototype._restoreState = _OPT__restoreState;
	_OptionGroup.prototype._hasState = _OPT__hasState;
	_OptionGroup.prototype._onrowenter = _OPT__onrowenter;
	_OptionGroup.prototype._onbeforeupdate = _OPT__onbeforeupdate;
	
	//scope implementation in _OPT__Prototype function

	function _OPT__Option()
	{
		this.text = '';
		this.value = '';
		this.disabled = false;	
	}

	function _OPT_isVisible()
	{	return this._bVisible;	}

	function _OPT_show()
	{	this._bVisible = true;	}

	function _OPT_hide()
	{	this._bVisible = false;	}

	function  _OPT_getBorder()
	{	return this._nBorder;	}

	function  _OPT_setBorder(nBorder)
	{	this._nBorder = nBorder;	}

	function  _OPT_getAlignment()
	{	return this._nAlignment;	}

	function  _OPT_setAlignment(nAlignment)
	{
		if (typeof(nAlignment) != 'undefined')
		{
			if (nAlignment == '0')
				this._nAlignment = 0;
			else
				this._nAlignment = 1;
			return true;
		}
		@if (@trace_warnings)
			thisPage._traceWarning('Err 402: Argument [nAlignment] is undefined.','optiongrp.asp',this.name + '.setAlignment(nAlignment)');
		@end
		return false;
	}

	function  _OPT_getButton(nIndex)
	{
		if (!isNaN(parseInt(nIndex)) && nIndex >= 0 && nIndex < this.getCount())
			return this._options[Number(nIndex)];
		@if (@trace_warnings)
			thisPage._traceWarning('Err 431: Invalid argument or argument out of bounds. [nIndex = ' + nIndex + ']','optiongrp.asp',this.name + '.getButton(nIndex)');
		@end
	}

	function _OPT_addItem(strText,value,nIndex)
	{	
		@if (@trace_warnings)
			if (typeof(strText) != 'string')
				thisPage._traceWarning('Err 443: Wrong argument type [strText]. Expect a string.','optiongrp.asp',this.name + '.addItem(strText,[value],[nIndex])');
		@end
		var nCount = this.getCount();
		if (typeof(nIndex) == 'undefined')
			nIndex = nCount;
		if (typeof(value) == 'undefined')
			value = strText;
		if (!isNaN(parseInt(nIndex)))
		{	// add item at given nIndex
			var opt = new _OPT__Option;
			opt.text = String(strText);
			opt.value = value;
			if (nIndex < 0)		// add as first item in list
				nIndex = 0;
			if (nIndex < nCount)
			{	// insert item at given index
				var aTemp = this._options.slice(nIndex);
				this._options.length = nIndex;
				this._options[Number(nIndex)] = opt;
				this._options = this._options.concat(aTemp);
				return nIndex;
			}	
			else
			{	// add item to end of list
				this._options[nCount] = opt;
				return nCount;		
			}
		}
		@if (@trace_warnings)
			thisPage._traceWarning('Err 440: Wrong argument type [nIndex = ' + nIndex + ']. Expect a number.','optiongrp.asp',this.name + '.addItem(strText,[value],[nIndex])');
		@end
		return -1;	// failed to add item
	}

	function _OPT_removeItem(nIndex)
	{	
		if (typeof(nIndex) == 'undefined')
			nIndex = this._selectedIndex;
		if (!isNaN(parseInt(nIndex)) && nIndex >= 0 && nIndex < this.getCount())
		{	// remove item at nIndex
			var aTemp = this._options.slice(Number(nIndex)+1);
			this._options.length = nIndex;
			this._options = this._options.concat(aTemp);
			return true;
		}
		@if (@trace_warnings)
			thisPage._traceWarning('Err 431: Invalid argument or argument out of bounds. [nIndex = ' + nIndex + ']','optiongrp.asp',this.name + '.removeItem([nIndex])');
		@end
		return false;
	}

	function _OPT_clear()
	{	this._options.length = 0;	}

	function _OPT_getCount()
	{	return this._options.length;	}

	function _OPT_getValue(nIndex)
	{
		if (typeof(nIndex) == 'undefined')
			nIndex = this._selectedIndex;
		if (!isNaN(parseInt(nIndex)) && nIndex >= 0 && nIndex < this.getCount())
			return this._options[nIndex].value;
		@if (@trace_warnings)
			thisPage._traceWarning('Err 431: Invalid argument or argument out of bounds. [nIndex = ' + nIndex + ']','optiongrp.asp',this.name + '.getValue([nIndex])');
		@end
		return '';
	}

	function _OPT_setValue(value, nIndex)
	{
		@if (@trace_warnings)
			if (typeof(value) == 'undefined')
				thisPage._traceWarning('Err 403: Argument [value] is undefined.','optiongrp.asp',this.name + '.setValue(value,[nIndex])');
		@end
		if (typeof(nIndex) == 'undefined')
			nIndex = this._selectedIndex;
		if (!isNaN(parseInt(nIndex)) && nIndex >= 0 && nIndex < this.getCount())
		{
			this._options[nIndex].value = value;
			return true;
		}
		@if (@trace_warnings)
			thisPage._traceWarning('Err 431: Invalid argument or argument out of bounds. [nIndex = ' + nIndex + ']','optiongrp.asp',this.name + '.setValue(value,[nIndex])');
		@end
		return false;
	}

	function _OPT_getCaption(nIndex)
	{
		if (typeof(nIndex) == 'undefined')
			nIndex = this._selectedIndex;
		if (!isNaN(parseInt(nIndex)) && nIndex >= 0 && nIndex < this.getCount())
			return this._options[nIndex].text;
		@if (@trace_warnings)
			thisPage._traceWarning('Err 431: Invalid argument or argument out of bounds. [nIndex = ' + nIndex + ']','optiongrp.asp',this.name + '.getCaption([nIndex])');
		@end
		return '';
	}

	function _OPT_setCaption(strCaption,nIndex)
	{
		@if (@trace_warnings)