Question

以下是我的服务合同

[OperationContract]
[WebInvoke(Method = "POST", UriTemplate = "/SavePrint?seq={seq}", BodyStyle = WebMessageBodyStyle.Bare)]
bool SavePrint(int seq, string print_lines);

字符串将始终超过3000个字符，因此我无法在Url中传递它。

我尝试使用WebClient类上传。

WebClient client = new WebClient();
client.Headers["Content-type"] = "application/xml";
client.UploadString(baseURLTxtBox.Text + "/SavePrint?seq=1", LongStringHere);

当我尝试使用WebClient类的UploadString方法传递它时，服务失败并显示错误There was an error checking start element of object of type System.String. The data at the root level is invalid. Line 1, position 1.

我假设因为它被期望为XML所以我将我的字符串包装在XML

中

<string xmlns="">LongStringHere</string>

然后我收到错误

无法使用根名称'string'和根命名空间''反序列化XML主体（对于操作'SavePrint'和契约（'IPrintAPI'， 'http://tempuri.org/'））使用DataContractSerializer。确保对应于XML的类型被添加到已知类型集合中服务。

我不知道我应该如何在已知类型集合中添加字符串。

Answer 1

包装"<string></string>"不是编码xml的正确方法。并且不确定为什么你用xml编码....如果字符串不是xml。

见

http://www.w3.org/TR/html401/interact/forms.html#form-content-type

不管....尝试

string url = baseURLTxtBox.Text;

using(WebClient client = new WebClient())
{
    System.Collections.Specialized.NameValueCollection nvc = new System.Collections.Specialized.NameValueCollection();
    nvc.Add("ParameterOne", "!@#$%^&*() Anything Any Characters Here");
    nvc.Add("ParameterTwo", LongString);
    byte[] responsebytes = client.UploadValues(url, "POST", nvc);
    string responsebody = Encoding.UTF8.GetString(responsebytes);
}

APPEND：

 [OperationContract]
    [WebInvoke(Method = "POST", UriTemplate = "Mod?ParameterOne={ParameterOne}&ParameterTwo={ParameterTwo}")]
    bool SavePrint(string ParameterOne, string ParameterTwo);

APPEND：

现在尝试增加你的maxReceivedMessageSize。

<endpoint
          address  = "http://somethinghere"
    binding  = "basicHttpBinding" bindingConfiguration="BasicHttpEndpointBinding"
    contract = "MyIService" >
</endpoint>

  <basicHttpBinding>
<binding name="BasicHttpEndpointBinding"
   maxBufferSize="9000000"
   maxReceivedMessageSize="9000000"                      >
  <security mode = "None">
  </security>
</binding>

在WCF服务中接收大字符串

1 个答案: