protected void Query_OnClick(object sender, EventArgs e)
{
QueryRequestBuilder queryBuilder = QueryRequest.GetBuilder();
QueryRequest queryRequest =
queryBuilder.SetMerchantId(Config.MERCHANT_ID)
.SetMerchantKeyId(merchant_key_id.Value)
.SetMerchantTransactionId(merchant_transaction_id.Value)
.SetPayzippyTransactionId(payzippy_transaction_id.Value)
.SetHashMethod(hash_method.Value)
.Build(Config.SECRET_KEY);
string jsonResponse = WebClient.DoQuery(queryRequest.GetRequestParams(), Config.API_QUERY);
this.Context.Items.Add("query_response", jsonResponse);
this.Server.Transfer("QueryResp.aspx");
}