问题
I\'m building a web application using Visual Studio 2012. I\'m attempting to add word count into my textbox. However after adding the the javascript codes and the html codes. I receive the error as stated above.
Here is my javascript codeds
Code :
function validateLimit(obj, divID, maxchar) {
objDiv = get_object(divID);
if (this.id) obj = this;
var remaningChar = maxchar - trimEnter(obj.value).length;
if (objDiv.id) {
objDiv.innerHTML = remaningChar + \" characters left\";
}
if (remaningChar <= 0) {
obj.value = obj.value.substring(maxchar, 0);
if (objDiv.id) {
objDiv.innerHTML = \"0 characters left\";
}
return false;
}
else
{ return true; }
}
function get_object(id) {
var object = null;
if (document.layers) {
object = document.layers[id];
} else if (document.all) {
object = document.all[id];
} else if (document.getElementById) {
object = document.getElementById(id);
}
return object;
}
function trimEnter(dataStr) {
return dataStr.replace(/(\\r\\n|\\r|\\n)/g, \"\");
}
Server codes in master page
<script type=\"text/javascript\" src=\"js/JScript.js\" ></script>
ASPX codes, ( Html codes )
<tr>
<th style=\"width: 595px; height: 135px;\">Official Report :</th>
<td colspan=\"4\" style=\"height: 135px\">
<asp:TextBox ID=\"tbofficial\" runat=\"server\" Height=\"121px\" TextMode=\"MultiLine\" Width=\"878px\" MaxLength=\"500\" ToolTip=\"Summary:(500 characters)\" onkeyup=\"return validateLimit(this, \'lblMsg1\', 500)\" ></asp:TextBox>
<div id=\"lblMsg1\">500 characters left</div>
<asp:RequiredFieldValidator ID=\"RequiredFieldValidator1\" runat=\"server\"
ControlToValidate=\"tbofficial\" Display=\"Dynamic\"
SetFocusOnError=\"True\">*</asp:RequiredFieldValidator>
<br />
<asp:Label ID=\"lblmsg\" runat=\"server\"></asp:Label>
<br />
<br />
<asp:Button ID=\"btnSubmit\" runat=\"server\" Text=\"Submit\" OnClick=\"btnSubmit_Click\" />
<asp:Button ID=\"btnClear\" runat=\"server\" Text=\"Clear\" OnClick=\"btnClear_Click\" />
</td>
</tr>
回答1:
You need a web.config key to enable the pre 4.5 validation mode.
More Info on ValidationSettings:UnobtrusiveValidationMode:
Specifies how ASP.NET globally enables the built-in validator controls to use unobtrusive JavaScript for client-side validation logic.
Type: UnobtrusiveValidationMode
Default value: None
Remarks: If this key value is set to "None" [default], the ASP.NET application will use the pre-4.5 behavior (JavaScript inline in the pages) for client-side validation logic. If this key value is set to "WebForms", ASP.NET uses HTML5 data-attributes and late bound JavaScript from an added script reference for client-side validation logic.
Example:
<appSettings> <add key="ValidationSettings:UnobtrusiveValidationMode" value="None" /> </appSettings>
回答2:
Rather than disabling a new feature, I opted to follow the instructions of the error. In my global.asax.cs I added:
protected void Application_Start(object sender, EventArgs e)
{
string JQueryVer = "1.7.1";
ScriptManager.ScriptResourceMapping.AddDefinition("jquery", new ScriptResourceDefinition
{
Path = "~/Scripts/jquery-" + JQueryVer + ".min.js",
DebugPath = "~/Scripts/jquery-" + JQueryVer + ".js",
CdnPath = "http://ajax.aspnetcdn.com/ajax/jQuery/jquery-" + JQueryVer + ".min.js",
CdnDebugPath = "http://ajax.aspnetcdn.com/ajax/jQuery/jquery-" + JQueryVer + ".js",
CdnSupportsSecureConnection = true,
LoadSuccessExpression = "window.jQuery"
});
}
This comes from an msdn blog post which highlights some of the advantages of script resource mappings. Of particular interest to me was centralized control over the delivery of the script files based on "debug=true", EnableCDN, etc.
回答3:
There are at least three ways to disable the use of unobtrusive JavaScript for client-side validation:
- Add the following to the web.config file:
<configuration> <appSettings> <add key="ValidationSettings:UnobtrusiveValidationMode" value="None" /> </appSettings> </configuration> - Set the value of the
System.Web.UI.ValidationSettings.UnobtrusiveValidationModestatic property toSystem.Web.UI.UnobtrusiveValidationMode.None - Set the value of the
System.Web.UI.Page.UnobtrusiveValidationModeinstance property toSystem.Web.UI.UnobtrusiveValidationMode.None
To disable the functionality on a per page basis, I prefer to set the Page.UnobtrusiveValidationMode property using the page directive:
<%@ Page Language="C#" UnobtrusiveValidationMode="None" %>
回答4:
Unobtrusive validation is enabled by default in new version of ASP.NET. Unobtrusive validation aims to decrease the page size by replacing the inline JavaScript for performing validation with a small JavaScript library that uses jQuery.
You can either disable it by editing web.config to include the following:
<appSettings>
<add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />
</appSettings>
Or better yet properly configure it by modifying the Application_Start method in global.asax:
void Application_Start(object sender, EventArgs e)
{
RouteConfig.RegisterRoutes(System.Web.Routing.RouteTable.Routes);
ScriptManager.ScriptResourceMapping.AddDefinition("jquery",
new ScriptResourceDefinition
{
Path = "/~Scripts/jquery-2.1.1.min.js"
}
);
}
Page 399 of Beginning ASP.NET 4.5.1 in C# and VB provides a discussion on the benefit of unobtrusive validation and a walkthrough for configuring it.
For those looking for RouteConfig. It is added automatically when you make a new project in visual studio to the App_Code folder. The contents look something like this:
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.Routing;
using Microsoft.AspNet.FriendlyUrls;
namespace @default
{
public static class RouteConfig
{
public static void RegisterRoutes(RouteCollection routes)
{
var settings = new FriendlyUrlSettings();
settings.AutoRedirectMode = RedirectMode.Permanent;
routes.EnableFriendlyUrls(settings);
}
}
}
回答5:
to add a little more to the answer from b_levitt... on global.asax:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.SessionState;
using System.Web.UI;
namespace LoginPage
{
public class Global : System.Web.HttpApplication
{
protected void Application_Start(object sender, EventArgs e)
{
string JQueryVer = "1.11.3";
ScriptManager.ScriptResourceMapping.AddDefinition("jquery", new ScriptResourceDefinition
{
Path = "~/js/jquery-" + JQueryVer + ".min.js",
DebugPath = "~/js/jquery-" + JQueryVer + ".js",
CdnPath = "http://ajax.aspnetcdn.com/ajax/jQuery/jquery-" + JQueryVer + ".min.js",
CdnDebugPath = "http://ajax.aspnetcdn.com/ajax/jQuery/jquery-" + JQueryVer + ".js",
CdnSupportsSecureConnection = true,
LoadSuccessExpression = "window.jQuery"
});
}
}
}
on your default.aspx
<body>
<form id="UserSectionForm" runat="server">
<asp:ScriptManager ID="ScriptManager" runat="server">
<Scripts>
<asp:ScriptReference Name="jquery" />
</Scripts>
</asp:ScriptManager>
<%--rest of your markup goes here--%>
</form>
</body>
回答6:
I believe I have encountered the same quandary. I started encountering the problem when I changed to:
</system.web>
<httpRuntime targetFramework="4.5"/>
Which gives the error message you describe above.
adding:
<appSettings>
<add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />
Solves the issue, but then it makes your validation controls/scripts throw Javascript runtime errors. If you change to:
</system.web>
<httpRuntime targetFramework="4.0"/>
You should be OK, but you’ll have to make sure the rest of your code does/ behaves as desired. You might also have to forgo some new features only available in 4.5 onward.
P.S. It is highly recommended that you read the following before implementing this solution. Especially, if you use Async functionality:
https://blogs.msdn.microsoft.com/webdev/2012/11/19/all-about-httpruntime-targetframework/
UPDATE April 2017: After some some experimentation and testing I have come up with a combination that works:
<add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />
<httpRuntime targetFramework="4.5.1" />
with:
jQuery version 1.11.3
回答7:
The problem occurred due to the Control validator. Just Add the J Query reference to your web page as follows and then add the Validation Settings in your web.config file to overcome the problem. I too faced the same problem and the below gave the solution to my problem.
Step1:
Step2 :
It will resolve your problem.
回答8:
If your code or configuration looks correct after looking at the other answers, I also had this issue with a deployed (development staging) web site and found that the problem was that the Global.asax file had been renamed. (By me, a few days earlier when messing with customErrors and the Application_Error)
来源：https://stackoverflow.com/questions/16660900/webforms-unobtrusivevalidationmode-requires-a-scriptresourcemapping-for-jquery