Question

今天我一直试图将图像保存到数据库中，我真的无法理解。

我制作了下表（Afbeeldingen）：

id:int
afbeelding1:varbinary(max)

使用Linq-to-SQL类导入它，为它编写了一个WCF服务：

    [OperationContract]
    public void setAfbeelding(Afbeelding a)
    {
        dc.Afbeeldings.InsertOnSubmit(a);
        dc.SubmitChanges();
    }

然后在我的xaml页面中，我尝试创建Afbeelding，但我无法将Byte[]设为varbinary。我不知道该怎么做，我似乎无法找到任何相关内容。

OpenFileDialog openFileDialog = new OpenFileDialog();

openFileDialog.Filter = "JPEG files|*.jpg";

if (openFileDialog.ShowDialog() == true)
{
   Stream stream = (Stream)openFileDialog.File.OpenRead();
   Byte[] bytes = new Byte[stream.Length];
   stream.Read(bytes, 0, (int)stream.Length);
   string fileName = openFileDialog.File.Name;

   Afbeelding a = new Afbeelding();
   a.id = 1;
   a.afbeelding1 = new Byte{ Bytes = bytes};
}

我希望有人可以帮助我，因为我真的无法解决这个问题。

提前谢谢你，托马斯

编辑：解决了这个问题后，当我收到错误时按下按钮会发生什么。

System.ServiceModel.FaultException: The formatter threw an exception while trying to deserialize the message: There was an error while trying to deserialize parameter :a. The InnerException message was 'There was an error deserializing the object of type OndernemersAward.Web.Afbeelding. The maximum array length quota (16384) has been exceeded while reading XML data. This quota may be increased by changing the MaxArrayLength property on the XmlDictionaryReaderQuotas object used when creating the XML reader.'.  Please see InnerException for more details.
   at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
   at System.ServiceModel.ClientBase`1.ChannelBase`1.EndInvoke(String methodName, Object[] args, IAsyncResult result)
   at OndernemersAward.EditAfbeeldingServiceReference.EditAfbeeldingServiceClient.EditAfbeeldingServiceClientChannel.EndsetAfbeelding(IAsyncResult result)
   at OndernemersAward.EditAfbeeldingServiceReference.EditAfbeeldingServiceClient.OndernemersAward.EditAfbeeldingServiceReference.EditAfbeeldingService.EndsetAfbeelding(IAsyncResult result)
   at OndernemersAward.EditAfbeeldingServiceReference.EditAfbeeldingServiceClient.OnEndsetAfbeelding(IAsyncResult result)
   at System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result)

Answer 1

您需要构建一个Binary对象。

a.afbeelding1 = new Binary( bytes );

将图像保存为varbinary（silverlight）

1 个答案: