捕获asp.net ValidationSummary 控件消息。

今天在改代码时，要把以前的ValidationSummary服务器控件，弹出验证信息后跳转页面。如果重新写客户端脚本验证太麻烦。所以想找个偷懒的方法，最好可以重载ValidationSummary 验证信息。那就开始找吧。

首先，在aspnetForm 上会调用 onsubmit="javascript:return WebForm_OnSubmit();",

当页面存在验证控件时：

function WebForm_OnSubmit() {
null;
return true;
}

这里我不考虑页面不存在验证控件的现象。

接着页面会调用 ValidatorOnSubmit 函数

然后在asp.net 中的验证脚本中会有个叫ValidatorCommonOnSubmit 的函数，这个验证脚本可以在ScriptResource.axd 中找到

页面在加载时会注册Page_ClientValidate(validationGroup) 函数。（但是说实话没太看懂ValidatorCommonOnSubmit和Page_ClientValidate之间是如何调用。）

if (causesValidation && (typeof(Page_ClientValidate) === 'function') && !Page_ClientValidate(validationGroup || null)) {            return;        }

最后在Page_ClientValidate函数中会调用 VlidationSummaryOnSubmit（validationGroup），在这里 asp.net ValidationSummary的消息就可以任我宰割了。

跟了一下代码后，虽然asp.net 验证控件最终还是用javascript验证的，但是他为了考虑不环境和意外境况，做了很多额外的处理。倒不如在做验证时，自己写脚本验证这样又节省性能，有容易控制。

以下是asp.net 验证控件的代码（可以在ScriptResource.axd 中找到）

var Page_ValidationVer = "125";
var Page_IsValid = true;
var Page_BlockSubmit = false;
var Page_InvalidControlToBeFocused = null;
function ValidatorUpdateDisplay(val) {
if (typeof (val.display) == "string") {
if (val.display == "None") {
return;
}
if (val.display == "Dynamic") {
val.style.display = val.isvalid ? "none" : "inline";
return;
}
}
if ((navigator.userAgent.indexOf("Mac") > -1) &&
(navigator.userAgent.indexOf("MSIE") > -1)) {
val.style.display = "inline";
}
val.style.visibility = val.isvalid ? "hidden" : "visible";
}
function ValidatorUpdateIsValid() {
Page_IsValid = AllValidatorsValid(Page_Validators);
}
function AllValidatorsValid(validators) {
if ((typeof (validators) != "undefined") && (validators != null)) {
var i;
for (i = 0; i < validators.length; i++) {
if (!validators[i].isvalid) {
return false;
}
}
}
return true;
}
function ValidatorHookupControlID(controlID, val) {
if (typeof (controlID) != "string") {
return;
}
var ctrl = document.getElementById(controlID);
if ((typeof (ctrl) != "undefined") && (ctrl != null)) {
ValidatorHookupControl(ctrl, val);
}
else {
val.isvalid = true;
val.enabled = false;
}
}
function ValidatorHookupControl(control, val) {
if (typeof (control.tagName) != "string") {
return;
}
if (control.tagName != "INPUT" && control.tagName != "TEXTAREA" && control.tagName != "SELECT") {
var i;
for (i = 0; i < control.childNodes.length; i++) {
ValidatorHookupControl(control.childNodes[i], val);
}
return;
}
else {
if (typeof (control.Validators) == "undefined") {
control.Validators = new Array;
var eventType;
if (control.type == "radio") {
eventType = "onclick";
} else {
eventType = "onchange";
if (typeof (val.focusOnError) == "string" && val.focusOnError == "t") {
ValidatorHookupEvent(control, "onblur", "ValidatedControlOnBlur(event); ");
}
}
ValidatorHookupEvent(control, eventType, "ValidatorOnChange(event); ");
if (control.type == "text" ||
control.type == "password" ||
control.type == "file") {
ValidatorHookupEvent(control, "onkeypress",
"if (!ValidatedTextBoxOnKeyPress(event)) { event.cancelBubble = true; if (event.stopPropagation) event.stopPropagation(); return false; } ");
}
}
control.Validators[control.Validators.length] = val;
}
}
function ValidatorHookupEvent(control, eventType, functionPrefix) {
var ev;
eval("ev = control." + eventType + ";");
if (typeof (ev) == "function") {
ev = ev.toString();
ev = ev.substring(ev.indexOf("{") + 1, ev.lastIndexOf("}"));
}
else {
ev = "";
}
var func;
if (navigator.appName.toLowerCase().indexOf('explorer') > -1) {
func = new Function(functionPrefix + " " + ev);
}
else {
func = new Function("event", functionPrefix + " " + ev);
}
eval("control." + eventType + " = func;");
}
function ValidatorGetValue(id) {
var control;
control = document.getElementById(id);
if (typeof (control.value) == "string") {
return control.value;
}
return ValidatorGetValueRecursive(control);
}
function ValidatorGetValueRecursive(control) {
if (typeof (control.value) == "string" && (control.type != "radio" || control.checked == true)) {
return control.value;
}
var i, val;
for (i = 0; i < control.childNodes.length; i++) {
val = ValidatorGetValueRecursive(control.childNodes[i]);
if (val != "") return val;
}
return "";
}
function Page_ClientValidate(validationGroup) {
Page_InvalidControlToBeFocused = null;
if (typeof (Page_Validators) == "undefined") {
return true;
}
var i;
for (i = 0; i < Page_Validators.length; i++) {
ValidatorValidate(Page_Validators[i], validationGroup, null);
}
ValidatorUpdateIsValid();
ValidationSummaryOnSubmit(validationGroup);
Page_BlockSubmit = !Page_IsValid;
return Page_IsValid;
}
function ValidatorCommonOnSubmit() {
Page_InvalidControlToBeFocused = null;
var result = !Page_BlockSubmit;
if ((typeof (window.event) != "undefined") && (window.event != null)) {
window.event.returnValue = result;
}
Page_BlockSubmit = false;
return result;
}
function ValidatorEnable(val, enable) {
val.enabled = (enable != false);
ValidatorValidate(val);
ValidatorUpdateIsValid();
}
function ValidatorOnChange(event) {
if (!event) {
event = window.event;
}
Page_InvalidControlToBeFocused = null;
var targetedControl;
if ((typeof (event.srcElement) != "undefined") && (event.srcElement != null)) {
targetedControl = event.srcElement;
}
else {
targetedControl = event.target;
}
var vals;
if (typeof (targetedControl.Validators) != "undefined") {
vals = targetedControl.Validators;
}
else {
if (targetedControl.tagName.toLowerCase() == "label") {
targetedControl = document.getElementById(targetedControl.htmlFor);
vals = targetedControl.Validators;
}
}
var i;
for (i = 0; i < vals.length; i++) {
ValidatorValidate(vals[i], null, event);
}
ValidatorUpdateIsValid();
}
function ValidatedTextBoxOnKeyPress(event) {
if (event.keyCode == 13) {
ValidatorOnChange(event);
var vals;
if ((typeof (event.srcElement) != "undefined") && (event.srcElement != null)) {
vals = event.srcElement.Validators;
}
else {
vals = event.target.Validators;
}
return AllValidatorsValid(vals);
}
return true;
}
function ValidatedControlOnBlur(event) {
var control;
if ((typeof (event.srcElement) != "undefined") && (event.srcElement != null)) {
control = event.srcElement;
}
else {
control = event.target;
}
if ((typeof (control) != "undefined") && (control != null) && (Page_InvalidControlToBeFocused == control)) {
control.focus();
Page_InvalidControlToBeFocused = null;
}
}
function ValidatorValidate(val, validationGroup, event) {
val.isvalid = true;
if ((typeof (val.enabled) == "undefined" || val.enabled != false) && IsValidationGroupMatch(val, validationGroup)) {
if (typeof (val.evaluationfunction) == "function") {
val.isvalid = val.evaluationfunction(val);
if (!val.isvalid && Page_InvalidControlToBeFocused == null &&
typeof (val.focusOnError) == "string" && val.focusOnError == "t") {
ValidatorSetFocus(val, event);
}
}
}
ValidatorUpdateDisplay(val);
}
function ValidatorSetFocus(val, event) {
var ctrl;
if (typeof (val.controlhookup) == "string") {
var eventCtrl;
if ((typeof (event) != "undefined") && (event != null)) {
if ((typeof (event.srcElement) != "undefined") && (event.srcElement != null)) {
eventCtrl = event.srcElement;
}
else {
eventCtrl = event.target;
}
}
if ((typeof (eventCtrl) != "undefined") && (eventCtrl != null) &&
(typeof (eventCtrl.id) == "string") &&
(eventCtrl.id == val.controlhookup)) {
ctrl = eventCtrl;
}
}
if ((typeof (ctrl) == "undefined") || (ctrl == null)) {
ctrl = document.getElementById(val.controltovalidate);
}
if ((typeof (ctrl) != "undefined") && (ctrl != null) &&
(ctrl.tagName.toLowerCase() != "table" || (typeof (event) == "undefined") || (event == null)) &&
((ctrl.tagName.toLowerCase() != "input") || (ctrl.type.toLowerCase() != "hidden")) &&
(typeof (ctrl.disabled) == "undefined" || ctrl.disabled == null || ctrl.disabled == false) &&
(typeof (ctrl.visible) == "undefined" || ctrl.visible == null || ctrl.visible != false) &&
(IsInVisibleContainer(ctrl))) {
if ((ctrl.tagName.toLowerCase() == "table" && (typeof (__nonMSDOMBrowser) == "undefined" || __nonMSDOMBrowser)) ||
(ctrl.tagName.toLowerCase() == "span")) {
var inputElements = ctrl.getElementsByTagName("input");
var lastInputElement = inputElements[inputElements.length - 1];
if (lastInputElement != null) {
ctrl = lastInputElement;
}
}
if (typeof (ctrl.focus) != "undefined" && ctrl.focus != null) {
ctrl.focus();
Page_InvalidControlToBeFocused = ctrl;
}
}
}
function IsInVisibleContainer(ctrl) {
if (typeof (ctrl.style) != "undefined" &&
((typeof (ctrl.style.display) != "undefined" &&
ctrl.style.display == "none") ||
(typeof (ctrl.style.visibility) != "undefined" &&
ctrl.style.visibility == "hidden"))) {
return false;
}
else if (typeof (ctrl.parentNode) != "undefined" &&
ctrl.parentNode != null &&
ctrl.parentNode != ctrl) {
return IsInVisibleContainer(ctrl.parentNode);
}
return true;
}
function IsValidationGroupMatch(control, validationGroup) {
if ((typeof (validationGroup) == "undefined") || (validationGroup == null)) {
return true;
}
var controlGroup = "";
if (typeof (control.validationGroup) == "string") {
controlGroup = control.validationGroup;
}
return (controlGroup == validationGroup);
}
function ValidatorOnLoad() {
if (typeof (Page_Validators) == "undefined")
return;
var i, val;
for (i = 0; i < Page_Validators.length; i++) {
val = Page_Validators[i];
if (typeof (val.evaluationfunction) == "string") {
eval("val.evaluationfunction = " + val.evaluationfunction + ";");
}
if (typeof (val.isvalid) == "string") {
if (val.isvalid == "False") {
val.isvalid = false;
Page_IsValid = false;
}
else {
val.isvalid = true;
}
} else {
val.isvalid = true;
}
if (typeof (val.enabled) == "string") {
val.enabled = (val.enabled != "False");
}
if (typeof (val.controltovalidate) == "string") {
ValidatorHookupControlID(val.controltovalidate, val);
}
if (typeof (val.controlhookup) == "string") {
ValidatorHookupControlID(val.controlhookup, val);
}
}
Page_ValidationActive = true;
}
function ValidatorConvert(op, dataType, val) {
function GetFullYear(year) {
var twoDigitCutoffYear = val.cutoffyear % 100;
var cutoffYearCentury = val.cutoffyear - twoDigitCutoffYear;
return ((year > twoDigitCutoffYear) ? (cutoffYearCentury - 100 + year) : (cutoffYearCentury + year));
}
var num, cleanInput, m, exp;
if (dataType == "Integer") {
exp = /^\s*[-\+]?\d+\s*$/;
if (op.match(exp) == null)
return null;
num = parseInt(op, 10);
return (isNaN(num) ? null : num);
}
else if (dataType == "Double") {
exp = new RegExp("^\\s*([-\\+])?(\\d*)\\" + val.decimalchar + "?(\\d*)\\s*$");
m = op.match(exp);
if (m == null)
return null;
if (m[2].length == 0 && m[3].length == 0)
return null;
cleanInput = (m[1] != null ? m[1] : "") + (m[2].length > 0 ? m[2] : "0") + (m[3].length > 0 ? "." + m[3] : "");
num = parseFloat(cleanInput);
return (isNaN(num) ? null : num);
}
else if (dataType == "Currency") {
var hasDigits = (val.digits > 0);
var beginGroupSize, subsequentGroupSize;
var groupSizeNum = parseInt(val.groupsize, 10);
if (!isNaN(groupSizeNum) && groupSizeNum > 0) {
beginGroupSize = "{1," + groupSizeNum + "}";
subsequentGroupSize = "{" + groupSizeNum + "}";
}
else {
beginGroupSize = subsequentGroupSize = "+";
}
exp = new RegExp("^\\s*([-\\+])?((\\d" + beginGroupSize + "(\\" + val.groupchar + "\\d" + subsequentGroupSize + ")+)|\\d*)"
+ (hasDigits ? "\\" + val.decimalchar + "?(\\d{0," + val.digits + "})" : "")
+ "\\s*$");
m = op.match(exp);
if (m == null)
return null;
if (m[2].length == 0 && hasDigits && m[5].length == 0)
return null;
cleanInput = (m[1] != null ? m[1] : "") + m[2].replace(new RegExp("(\\" + val.groupchar + ")", "g"), "") + ((hasDigits && m[5].length > 0) ? "." + m[5] : "");
num = parseFloat(cleanInput);
return (isNaN(num) ? null : num);
}
else if (dataType == "Date") {
var yearFirstExp = new RegExp("^\\s*((\\d{4})|(\\d{2}))([-/]|\\. ?)(\\d{1,2})\\4(\\d{1,2})\\.?\\s*$");
m = op.match(yearFirstExp);
var day, month, year;
if (m != null && (m[2].length == 4 || val.dateorder == "ymd")) {
day = m[6];
month = m[5];
year = (m[2].length == 4) ? m[2] : GetFullYear(parseInt(m[3], 10))
}
else {
if (val.dateorder == "ymd") {
return null;
}
var yearLastExp = new RegExp("^\\s*(\\d{1,2})([-/]|\\. ?)(\\d{1,2})(?:\\s|\\2)((\\d{4})|(\\d{2}))(?:\\s\u0433\\.)?\\s*$");
m = op.match(yearLastExp);
if (m == null) {
return null;
}
if (val.dateorder == "mdy") {
day = m[3];
month = m[1];
}
else {
day = m[1];
month = m[3];
}
year = (m[5].length == 4) ? m[5] : GetFullYear(parseInt(m[6], 10))
}
month -= 1;
var date = new Date(year, month, day);
if (year < 100) {
date.setFullYear(year);
}
return (typeof (date) == "object" && year == date.getFullYear() && month == date.getMonth() && day == date.getDate()) ? date.valueOf() : null;
}
else {
return op.toString();
}
}
function ValidatorCompare(operand1, operand2, operator, val) {
var dataType = val.type;
var op1, op2;
if ((op1 = ValidatorConvert(operand1, dataType, val)) == null)
return false;
if (operator == "DataTypeCheck")
return true;
if ((op2 = ValidatorConvert(operand2, dataType, val)) == null)
return true;
switch (operator) {
case "NotEqual":
return (op1 != op2);
case "GreaterThan":
return (op1 > op2);
case "GreaterThanEqual":
return (op1 >= op2);
case "LessThan":
return (op1 < op2);
case "LessThanEqual":
return (op1 <= op2);
default:
return (op1 == op2);
}
}
function CompareValidatorEvaluateIsValid(val) {
var value = ValidatorGetValue(val.controltovalidate);
if (ValidatorTrim(value).length == 0)
return true;
var compareTo = "";
if ((typeof (val.controltocompare) != "string") ||
(typeof (document.getElementById(val.controltocompare)) == "undefined") ||
(null == document.getElementById(val.controltocompare))) {
if (typeof (val.valuetocompare) == "string") {
compareTo = val.valuetocompare;
}
}
else {
compareTo = ValidatorGetValue(val.controltocompare);
}
var operator = "Equal";
if (typeof (val.operator) == "string") {
operator = val.operator;
}
return ValidatorCompare(value, compareTo, operator, val);
}
function CustomValidatorEvaluateIsValid(val) {
var value = "";
if (typeof (val.controltovalidate) == "string") {
value = ValidatorGetValue(val.controltovalidate);
if ((ValidatorTrim(value).length == 0) &&
((typeof (val.validateemptytext) != "string") || (val.validateemptytext != "true"))) {
return true;
}
}
var args = { Value: value, IsValid: true };
if (typeof (val.clientvalidationfunction) == "string") {
eval(val.clientvalidationfunction + "(val, args) ;");
}
return args.IsValid;
}
function RegularExpressionValidatorEvaluateIsValid(val) {
var value = ValidatorGetValue(val.controltovalidate);
if (ValidatorTrim(value).length == 0)
return true;
var rx = new RegExp(val.validationexpression);
var matches = rx.exec(value);
return (matches != null && value == matches[0]);
}
function ValidatorTrim(s) {
var m = s.match(/^\s*(\S+(\s+\S+)*)\s*$/);
return (m == null) ? "" : m[1];
}
function RequiredFieldValidatorEvaluateIsValid(val) {
return (ValidatorTrim(ValidatorGetValue(val.controltovalidate)) != ValidatorTrim(val.initialvalue))
}
function RangeValidatorEvaluateIsValid(val) {
var value = ValidatorGetValue(val.controltovalidate);
if (ValidatorTrim(value).length == 0)
return true;
return (ValidatorCompare(value, val.minimumvalue, "GreaterThanEqual", val) &&
ValidatorCompare(value, val.maximumvalue, "LessThanEqual", val));
}
function ValidationSummaryOnSubmit(validationGroup) {
if (typeof (Page_ValidationSummaries) == "undefined")
return;
var summary, sums, s;
for (sums = 0; sums < Page_ValidationSummaries.length; sums++) {
summary = Page_ValidationSummaries[sums];
summary.style.display = "none";
if (!Page_IsValid && IsValidationGroupMatch(summary, validationGroup)) {
var i;
if (summary.showsummary != "False") {
summary.style.display = "";
if (typeof (summary.displaymode) != "string") {
summary.displaymode = "BulletList";
}
switch (summary.displaymode) {
case "List":
headerSep = "<br>";
first = "";
pre = "";
post = "<br>";
end = "";
break;
case "BulletList":
default:
headerSep = "";
first = "<ul>";
pre = "<li>";
post = "</li>";
end = "</ul>";
break;
case "SingleParagraph":
headerSep = " ";
first = "";
pre = "";
post = " ";
end = "<br>";
break;
}
s = "";
if (typeof (summary.headertext) == "string") {
s += summary.headertext + headerSep;
}
s += first;
for (i = 0; i < Page_Validators.length; i++) {
if (!Page_Validators[i].isvalid && typeof (Page_Validators[i].errormessage) == "string") {
s += pre + Page_Validators[i].errormessage + post;
}
}
s += end;
summary.innerHTML = s;
window.scrollTo(0, 0);
}
if (summary.showmessagebox == "True") {
s = "";
if (typeof (summary.headertext) == "string") {
s += summary.headertext + "\r\n";
}
var lastValIndex = Page_Validators.length - 1;
for (i = 0; i <= lastValIndex; i++) {
if (!Page_Validators[i].isvalid && typeof (Page_Validators[i].errormessage) == "string") {
switch (summary.displaymode) {
case "List":
s += Page_Validators[i].errormessage;
if (i < lastValIndex) {
s += "\r\n";
}
break;
case "BulletList":
default:
s += "- " + Page_Validators[i].errormessage;
if (i < lastValIndex) {
s += "\r\n";
}
break;
case "SingleParagraph":
s += Page_Validators[i].errormessage + " ";
break;
}
}
}
s += "- Wilt u de informatie compleet?"
if (confirm(s)) {
window.location.href = "/storeCreateProfile.aspx";
}
}
}
}
}

//if (typeof (Sys) !== 'undefined') Sys.Application.notifyScriptLoaded();