Data driven subscription using c#

Question

I am getting the following error "System.Web.Services.Protocols.SoapException: The required field Field is missing from the input structure. ---> Microsoft.ReportingServices.Diagnostics.Utilities.MissingElementException: The required field Field
is missing from the input structure.
   at Microsoft.ReportingServices.WebServer.ReportingService2005Impl.CreateSubscription(String Report, ExtensionSettings ExtensionSettings, Boolean isDataDriven, DataRetrievalPlan DataRetrievalPlan, String Description, String EventType, String MatchData,
ParameterValueOrFieldReference[] Parameters, String& SubscriptionID)
   at Microsoft.ReportingServices.WebServer.ReportingService2005.CreateDataDrivenSubscription(String Report, ExtensionSettings ExtensionSettings, DataRetrievalPlan DataRetrievalPlan, String Description, String EventType, String MatchData, ParameterValueOrFieldReference[]
Parameters, String& SubscriptionID)".
Below is the code i used .
       ReportingService2005 rs = new ReportingService2005();
            rs.Credentials = System.Net.CredentialCache.DefaultCredentials;
            //the name of the report for which the DDS is to be created
            string report = "/testDataDriven/Report1";
            string description = "Programmatic Data Driven Subscription for Windows File Share";
            //set extension as Windows File Share
            ExtensionSettings settings = new ExtensionSettings();
            settings.Extension = "Report Server Email";
            // Set the extension parameter values.
            ParameterValueOrFieldReference[] extensionParams =
               new ParameterValueOrFieldReference[8];
            ParameterFieldReference to = new ParameterFieldReference(); // Data-driven.
            to.ParameterName = "TO";
            to.FieldAlias = "EmailAddress";
            extensionParams[0] = to;
            ParameterValue replyTo = new ParameterValue();
            replyTo.Name = "ReplyTo";
            replyTo.Value = "[email protected]";
            extensionParams[1] = replyTo;
            ParameterValue includeReport = new ParameterValue();
            includeReport.Name = "IncludeReport";
            includeReport.Value = "False";
            extensionParams[2] = includeReport;
            ParameterValue renderFormat = new ParameterValue();
            renderFormat.Name = "RenderFormat";
            renderFormat.Value = "HTML4.0";
            extensionParams[3] = renderFormat;
            ParameterValue priority = new ParameterValue();
            priority.Name = "Priority";
            priority.Value = "NORMAL";
            extensionParams[4] = priority;
            ParameterValue subject = new ParameterValue();
            subject.Name = "Subject";
            subject.Value = "Your sales report";
            extensionParams[5] = subject;
            ParameterValue comment = new ParameterValue();
            comment.Name = "Comment";
            comment.Value = "Here is the link to your report.";
            extensionParams[6] = comment;
            ParameterValue includeLink = new ParameterValue();
            includeLink.Name = "IncludeLink";
            includeLink.Value = "True";
            extensionParams[7] = includeLink;
            settings.ParameterValues = extensionParams;
            DataSource delivery = new DataSource();
            delivery.Name = "";
            DataSourceDefinition dataSourceDef = new DataSourceDefinition();
            dataSourceDef.ConnectString = "my credentials";
            dataSourceDef.CredentialRetrieval = CredentialRetrievalEnum.Store;
            dataSourceDef.Enabled = true;
            dataSourceDef.EnabledSpecified = true;
            dataSourceDef.Extension = "ORACLE";
            dataSourceDef.WindowsCredentials = false;
            dataSourceDef.ImpersonateUser = false;
            dataSourceDef.UserName = "";
            dataSourceDef.Password = "";
            delivery.Item = dataSourceDef;
            //we will have to declare the list of parameter(s) the report requires
            //in this report there is only one parameter named “Sales Order Number”
            //create fields list which is comprising of only one field in this report
            Field[] fieldlist = new Field[2];
            fieldlist[0] = new Field();
            fieldlist[0].Name = "REF_MONTH";
            fieldlist[0].Alias = "REF_MONTH";
            fieldlist[1] = new Field();
            fieldlist[1].Name = "MTSO_ID";
            fieldlist[1].Alias = "MTSO_ID";
            //create data set
            DataSetDefinition dataSetDefinition = new DataSetDefinition();
            dataSetDefinition.AccentSensitivitySpecified = false;
            dataSetDefinition.CaseSensitivitySpecified = false;
            dataSetDefinition.KanatypeSensitivitySpecified = false;
            dataSetDefinition.WidthSensitivitySpecified = false;
            dataSetDefinition.Fields = fieldlist;
            QueryDefinition queryDefition = new QueryDefinition();
            queryDefition.CommandText = "SELECT  REF_MONTH FROM  REFERRAL_TRN_DETAILS1";
            queryDefition.CommandType = "Text";
            queryDefition.Timeout = 1000;
            queryDefition.TimeoutSpecified = true;
            dataSetDefinition.Query = queryDefition;
            DataSetDefinition results = new DataSetDefinition();
            bool changed;
            string[] paramNames;
            results = rs.PrepareQuery(delivery, dataSetDefinition, out changed, out paramNames);
            DataRetrievalPlan dataRetrieval = new DataRetrievalPlan();
            dataRetrieval.DataSet = results;
            dataRetrieval.Item = dataSourceDef;
            // Set the event type and match data for the delivery.
            string eventType = "TimedSubscription";
            string matchData = @"<ScheduleDefinition>";
            matchData += @"<StartDateTime>2003-04-14T19:15:00-07:00</StartDateTime><WeeklyRecurrence><WeeksInterval>1</WeeksInterval>";
            matchData += @"<DaysOfWeek>";
            matchData += @"<Monday>True</Monday><Tuesday>True</Tuesday><Wednesday>True</Wednesday><Thursday>True</Thursday><Friday>True</Friday>";
            matchData += @"</DaysOfWeek></WeeklyRecurrence></ScheduleDefinition>";
            // Set the report parameter values.
            ParameterValueOrFieldReference[] parameters = new ParameterValueOrFieldReference[2];
            ParameterFieldReference empID = new ParameterFieldReference(); // Data-driven.
            empID.ParameterName = "val";
            empID.FieldAlias = "REF_MONTH";
            parameters[0] = empID;
            ParameterValue reportYear = new ParameterValue();
            reportYear.Name = "val";
            reportYear.Value = "112013";
            parameters[1] = reportYear;
            string subscriptionID = rs.CreateDataDrivenSubscription
            (report, settings, dataRetrieval, description, eventType, matchData, parameters);
i have one report parameter val, ineed to pass value from the query result.
santosh

Answer 1

Hi Santosh,
Based on your error message, it's has issue in the parameters arguments when you call the createDataDrivenSubscription() function. we suggest you to check your parameters argument to createDataDrivenSubscriptio() function. Mostly it's the issue of the
Parameters. You are passing a ParameterFieldReference array object called parameters. The web service is very strict with the FieldAlias property. It need the fieldAlias have to EXACTLY MATCH a field in the data set that
is part of the data retrieval plan, otherwise it will throw the exception above. So please pay attention to the white space or lower/higher cap issue. Also we suggest you use functions like Trim() to make fieldAlias fit the field in dataset.
Reference:
The required field Field is
missing from the input structure.
Best Regards,
Simon Hou