Data driven subscription

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.

Answer 1

Hi Santosh,
According to your code, you are trying to create a data driven subscription with the code. As per my understanding, the issue can be caused by the FieldAlias does not exactly match a field in the dataset that is a part of the data retrieval plan, then the
error is thrown. Note that exactly match includes case and leading/trailing whitespace.
So please make sure the fields name are exactly matched in the code. The following blog posted by Gouri Sohoni is for your reference:
http://www.sqlservercurry.com/2009/07/programmatically-create-data-driven.html
Hope this helps.
Thanks,
Katherine Xiong
Katherine Xiong
TechNet Community Support