分享代码,基于MicroSoftAjax的JS代码之1.3:异常处理(JSHelper.js)

--缪军-- 2011-06-19 09:03:22

上一篇:http://topic.csdn.net/u/20110619/21/26a9a882-9aa1-4888-9ed5-729a8234fca0.html

JSHelper.js

Type.registerNamespace("JSHelper");



JSHelper.ErrString = "";



JSHelper.Assert = function (bCondition, sErrMsg) {

    if (!bCondition) {JSHelper.ThrowError(sErrMsg);}

    }



JSHelper.KillException = function(sMsg,sUrl,sLine) {

	var _br = "\n" 

    if(JSHelper.ErrString==""){

        var _s="异常信息:" + sMsg + _br; 

        _s+=(sUrl!="")?("文件名称:" + sUrl + _br):"" ;

        _s+="行号:" + sLine + _br ; 

        var _func = window.onerror.caller;

        if(_func){_s+=_func;}

        JSHelper.ErrString=_s;

        }

    if($get('btnShowException')){JSHelper.DisplayControl("btnShowException",true); }

	if($get('btnClearException')){JSHelper.DisplayControl("btnClearException",true);}

    return true;

    }



JSHelper.ThrowError = function(sMsg){

    if(JSHelper.ErrString==""){

        JSHelper.ErrString = sMsg;

        throw new Error(JSHelper.ErrString);

        }   

    }



JSHelper.ToString = function(oVal){

	var _s = "";

	try {

		if (oVal) {var _s = oVal.toString().trim();}

		return _s;

	} 

	catch (e) {_s = "";}

	finally {return _s;}	

}



JSHelper.ToInt = function(oVal){

	var _i = 0;

	var _s = JSHelper.ToString(oVal);

	try {

		_i = parseInt(_s, 10);

	} 

	catch (e) {_i = 0;}

	finally {return _i;}

}



JSHelper.DisplayControl = function(sControlId,bStatus){

	var _Status = bStatus?"block":"none";

	var _btnShowException = $get(sControlId);

	if(_btnShowException){ _btnShowException.style.display = _Status;}

	else{JSHelper.ThrowError("控件"+sControlId + "不存在"); }

    }



window.onerror = JSHelper.KillException;