我正在使用Visual Studio 2012构建一个web应用程序。 我试图添加字数到我的文本框。 但是在添加了javascript代码和html代码之后。我收到如上所述的错误。

这是我的javascript代码

代码:

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, "");
}

母版页中的服务器代码

<script type="text/javascript" src="js/JScript.js" ></script>

ASPX代码,(Html代码)

<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>

当前回答

你需要一张网。Config键启用4.5前验证模式。

ValidationSettings的更多信息: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>

其他回答

再给b_levitt的答案补充一点…… 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"
            });
        }
    }
}

在你的default.aspx上

<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>

我没有禁用新功能,而是选择按照错误提示操作。在我的global.asax.cs中我添加了:

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"
    });
}

这来自msdn的一篇博文,文中强调了脚本资源映射的一些优点。我特别感兴趣的是基于“debug=true”、EnableCDN等对脚本文件的交付进行集中控制。

你需要一张网。Config键启用4.5前验证模式。

ValidationSettings的更多信息: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>

由于控制验证器而发生的问题。只需添加J查询参考到您的网页,然后添加验证设置在您的网页。配置文件来克服这个问题。我也面临着同样的问题,下面给出了解决我问题的方法。

步骤1:

步骤2:

它会解决你的问题。

在新版本的ASP.NET中,默认启用了不引人注目的验证。不引人注目的验证旨在通过使用jQuery的小型JavaScript库取代执行验证的内联JavaScript来减小页面大小。

您可以通过编辑web禁用它。配置包括以下内容:

<appSettings>
  <add key="ValidationSettings:UnobtrusiveValidationMode" value="None" />
</appSettings>

或者通过修改global.asax中的Application_Start方法来正确配置它:

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"
        }
    );
}

《入门ASP》399页。NET 4.5.1在c#和VB中提供了关于不显眼验证的好处的讨论和配置它的演练。

对于那些寻找routecconfig的人。当你在visual studio中创建一个新项目到App_Code文件夹时,它会自动添加。内容如下所示:

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);
        }
    }
}