小编Chr*_*lls的帖子

将值绑定到下拉列表并使用敲除验证时,即使我的敲除验证设置说明,也会始终显示错误消息messagesOnModified: true.

HTML

<input type="text" data-bind="value: Name" />
<br />
<select data-bind="value: State">
    <option value="">Select a state...</option>
    <option value="NY">New York</option>
    <option value="NJ">New Jersey</option>
</select>

JS

var ViewModel = function () {
     var self = this;

    self.Name = ko.observable().extend({
        required: { message: "You must enter a name." }
    });
    self.State = ko.observable().extend({
        required: { message: "You must select a state." }
    });

    self.Errors = ko.validation.group(self);
}

ko.validation.configure({
    messagesOnModified: true,
    insertMessages: true
});

ko.applyBindings(new ViewModel(), document.body);

并且jsfiddle显示文本框和下拉列表之间的区别:http://jsfiddle.net/f7v4m/ …

我有一个WCF服务定义为:

[ServiceContract]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Required)]
public class Service
{
    [OperationContract]
    [WebGet(ResponseFormat = WebMessageFormat.Json)]
    public string HelloWorld()
    {
        return "Hello World";
    }
}

我的Web.Config文件:

<configuration>
  <system.web>
    <compilation debug="true" targetFramework="4.0"/>
  </system.web>
  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="">
          <serviceMetadata httpGetEnabled="true"/>
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
      </serviceBehaviors>
        <endpointBehaviors>
            <behavior name="webHttpBehavior">
                <webHttp />
            </behavior>
        </endpointBehaviors>
    </behaviors>
    <bindings>
      <webHttpBinding>
        <binding name="webHttpBindingWithJsonP" crossDomainScriptAccessEnabled="true"/>
      </webHttpBinding>
    </bindings>
    <services>
      <service name="Service">
        <endpoint address="" binding="webHttpBinding" bindingConfiguration="webHttpBindingWithJsonP" contract="Service" behaviorConfiguration="webHttpBehavior"/>
      </service>
    </services>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" aspNetCompatibilityEnabled="true"/>
  </system.serviceModel>
</configuration>

我希望能够在我的WCF服务中访问ASP .Net会话变量,并且我希望WCF服务返回JSONP数据,但是即使使用这个简单的服务,浏览到../Service.svc/HelloWorld我得到了一个400 Bad Request错误.

有人能指出我正确的方向吗？