小编Tah*_*aha的帖子

我正处于开发应用程序的研发阶段,具有以下关键要求:

• HTML5 Web应用程序 - 也将具有混合版本
• 当没有Internet连接时,表单数据将存储在本地

由于配额限制,我无法使用网络存储 - 我正在比较SQLite和Indexed DB.

• SQLite似乎最适合,但它已被弃用
• 索引数据库是一个不错的选择,但没有Safari支持 - 混合应用程序应该在未来的iPad和Android设备上运行.

我对API的选择很困惑.在Safari上是否还有其他SQLite替代方案或索引数据库支持？

我有WCF服务,通过它我在DB中添加数据.它工作正常,但当我尝试发送大字节[]时,它返回"远程服务器返回错误:NotFound".

web.config中

    <?xml version="1.0"?>
<configuration>
  <connectionStrings>
    <add name="JabsBaseConnectionString" connectionString="Data Source=TAHASAGHIR-PC\SQLEXPRESS;Initial Catalog=JabsBase;Integrated Security=True" providerName="System.Data.SqlClient"/>
  </connectionStrings>
  <system.web>
    <compilation debug="true" targetFramework="4.0">
      <assemblies>
        <add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089"/>
      </assemblies>
    </compilation>
    <httpRuntime maxRequestLength="2097151" useFullyQualifiedRedirectUrl="true"/>
  </system.web>
  <system.serviceModel>    
    <serviceHostingEnvironment aspNetCompatibilityEnabled="false" multipleSiteBindingsEnabled="true" />
    <bindings>
      <basicHttpBinding>
        <binding name="SendLargeChat"
                 allowCookies="false"
                 bypassProxyOnLocal="false" 
                 maxBufferPoolSize="2147483647"
                 maxReceivedMessageSize="2147483647"
                 maxBufferSize="2147483647"
                 closeTimeout="10:00:00"
                 openTimeout="10:00:00"
                 receiveTimeout="10:00:00"
                 sendTimeout="10:00:00"
                 transferMode="Streamed">
          <readerQuotas 
            maxArrayLength="2147483647"
            maxBytesPerRead="2147483647"
            maxDepth="2147483647"
            maxNameTableCharCount="2147483647"
            maxStringContentLength="2147483647" />
        </binding>
      </basicHttpBinding>      
    </bindings>
    <services>
      <service name="Prototype.SendChatService" behaviorConfiguration="Prototype.SendChatServiceBehavior">
        <endpoint address="" binding="basicHttpBinding" bindingConfiguration="SendLargeChat" contract="Prototype.SendChatService" />
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
      </service>      
    </services>    
    <behaviors>
      <serviceBehaviors>
        <behavior name=""> …

我已经按照本教程构建了聊天应用程序.当我尝试添加我的服务的引用时,我收到以下错误:

合同需要Duplex,但Binding'BasicHttpBinding'不支持它,或者没有正确配置以支持它.

我的web.config如下:

<extensions>
  <bindingExtensions>
    <add name="pollingDuplex" type="System.ServiceModel.Configuration.PollingDuplexHttpBindingCollectionElement,System.ServiceModel.PollingDuplex, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
  </bindingExtensions>
</extensions>

<bindings>      
  <pollingDuplex>
    <binding name="chatPollingDuplex" duplexMode="MultipleMessagesPerPoll"/>
  </pollingDuplex>
</bindings>    

<services>      
  <service name="PrototypeSite.ChatService">        
    <endpoint address="" binding="pollingDuplex" bindingConfiguration="chatPollingDuplex" contract="PrototypeSite.ChatService" />
    <endpoint address="mex" binding="wsDualHttpBinding" contract="IMetadataExchange"/>
  </service>      
</services>