Failed to convert parameter

waynepangXXXwaynepangXXX
edited 1:44AM in FastReport .NET
I received this error message when i try to use dataselector to pass parameter to sql function... >[img]style_emoticons/<#EMO_DIR#>/ph34r.gif" style="vertical-align:middle" emoid=":ph34r:" border="0" alt="ph34r.gif" /> FastReport.Net v1.3.25 Failed to convert parameter value from a String[] to a String. Inner exception: Object must implement IConvertible. at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider) at System.Data.SqlClient.SqlParameter.CoerceValue(Object value, MetaType destinationType) at System.Data.SqlClient.SqlParameter.CoerceValue(Object value, MetaType destinationType) at System.Data.SqlClient.SqlParameter.GetCoercedValue() at System.Data.SqlClient.SqlParameter.Validate(Int32 index, Boolean isCommandProc) at System.Data.SqlClient.SqlCommand.BuildParamList(TdsParser parser, SqlParameterCollection parameters) at System.Data.SqlClient.SqlCommand.BuildExecuteSql(CommandBehavior behavior, String commandText, SqlParameterCollection parameters, _SqlRPC& rpc) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) at System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) at System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior) at System.Data.Common.DbCommand.System.Data.IDbCommand.ExecuteReader(CommandBehavior behavior) at System.Data.Common.DbDataAdapter.FillInternal(DataSet dataset, DataTable[] datatables, Int32 startRecord, Int32 maxRecords, String srcTable, IDbCommand command, CommandBehavior behavior) at System.Data.Common.DbDataAdapter.Fill(DataTable[] dataTables, Int32 startRecord, Int32 maxRecords, IDbCommand command, CommandBehavior behavior) at System.Data.Common.DbDataAdapter.Fill(DataTable dataTable) at FastReport.Data.DataConnectionBase.FillTableData(DataTable table, String selectCommand, CommandParameterCollection parameters) at FastReport.Data.DataConnectionBase.FillTable(TableDataSource source) at FastReport.Data.TableDataSource.LoadData(ArrayList rows) at FastReport.Data.DataSourceBase.xhRusQrvC() at FastReport.Data.DataSourceBase.Init(Relation relation, String filter, SortCollection sort) at FastReport.Data.DataSourceBase.Init(DataSourceBase parentData, String filter, SortCollection sort) at FastReport.DataBand.InitDataSource() at FastReport.GroupHeaderBand.JpXNscdbD() at FastReport.Engine.ReportEngine.O9MBQ6Cab(GroupHeaderBand ) at FastReport.Engine.ReportEngine.cYGNCD6VBn(BandCollection ) at FastReport.Engine.ReportEngine.0o7NSxJGS3(ReportPage ) at FastReport.Engine.ReportEngine.i73Nip9s4d() at FastReport.Engine.ReportEngine.ETbCChjds(ReportPage ) at FastReport.Engine.ReportEngine.j5trlWRx0(Boolean , Boolean , ReportPage ) at FastReport.Engine.ReportEngine.gqwMraMKx(Boolean , Boolean ) at FastReport.Report.Prepare(Boolean append) at FastReport.Report.Prepare() at plVQu6DlA1kWEugkKuY.9n4jBkD1hZrXBD9AwUv.T5oiHycTE()[/img]

Comments

  • AlexTZAlexTZ
    edited 1:44AM
    Sql parameter can take single value only. You are trying to pass an array of string values, this is not correct.
  • waynepangXXXwaynepangXXX
    edited 1:44AM
    AlexTZ wrote: »
    Sql parameter can take single value only. You are trying to pass an array of string values, this is not correct.

    It is posible if i want to make the array string convert to a string separate by "," , isn't it?
    Cuz i a newbie...thx for ur patient
  • AlexTZAlexTZ
    edited 1:44AM
    This conversion can be done using own function. You can declare it in the report script.
    Are you trying to pass values to sql "IN" operator (select * from table where field IN (@param1))? It will not work. You have to change the sql text before execution, instead of using a parameter.
  • waynepangXXXwaynepangXXX
    edited 1:44AM
    AlexTZ wrote: »
    This conversion can be done using own function. You can declare it in the report script.
    Are you trying to pass values to sql "IN" operator (select * from table where field IN (@param1))? It will not work. You have to change the sql text before execution, instead of using a parameter.

    thx ~ problem solve~

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