Unable to cast object of type 'System.String' to type 'System.Collections.Generic.Dictionary`2[System.String,System.Object]
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程序代码如下:

public string GetDetail()
{
string objectMame = "PO";
string actionName = "GetDetail";
Dictionary<string, string> dctparam = new Dictionary<string, string>();
//GetDetail Data 请求参数 Post 需要获取单据的单据编号
dctparam["Data"] = @"{""FBillNo"":""SMDCG170200391""}";
byte[] postData = apiEnv.getPostData(dctparam);
string z = GetToken();
apiEnv.apiSession.Token = z;
HttpResult result = apiEnv.DoAction(objectMame, actionName, postData);//主要是这句的postData的参数错误,可看附件图片的跟踪错误
if (result.httpOk)
{
if (result.apiResult.StatusCode == 200)
{
return result.apiResult.Data.ToString();
}
else
{
return result.apiResult.Message;
}
}
else
{
return "网络不通";
}
}
{
string objectMame = "PO";
string actionName = "GetDetail";
Dictionary<string, string> dctparam = new Dictionary<string, string>();
//GetDetail Data 请求参数 Post 需要获取单据的单据编号
dctparam["Data"] = @"{""FBillNo"":""SMDCG170200391""}";
byte[] postData = apiEnv.getPostData(dctparam);
string z = GetToken();
apiEnv.apiSession.Token = z;
HttpResult result = apiEnv.DoAction(objectMame, actionName, postData);//主要是这句的postData的参数错误,可看附件图片的跟踪错误
if (result.httpOk)
{
if (result.apiResult.StatusCode == 200)
{
return result.apiResult.Data.ToString();
}
else
{
return result.apiResult.Message;
}
}
else
{
return "网络不通";
}
}