I have the same problem as described here http://www.devart.com/forums/viewtopic. ... raclevalue.
I've found that when I do some changes into my project (usually it's form design) Visual Studio add the next code (marked with bold font) into Designer.cs file:
oracleParameter1.ArrayLength = 0;
oracleParameter1.ObjectTypeName = null;
oracleParameter1.OracleDbType = Devart.Data.Oracle.OracleDbType.Clob;
oracleParameter1.ParameterName = "P_WARES_DATA";
oracleParameter1.Precision = ((byte)(0));
oracleParameter1.Scale = ((byte)(0));
oracleParameter1.Size = 0;
oracleParameter1.Value = ((object)(resources.GetObject("oracleParameter1.Value"))); <-- this string thrown an exception
Ususally it add's randomized to three parameters.---------------------------
Microsoft Visual Studio
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Code generation for property 'OracleValue' failed. Error was: 'Property accessor 'OracleValue' on object 'Devart.Data.Oracle.OracleParameter' threw the following exception:'Specified method is not supported.''
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ОК
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To run program correctly I must delete them and then build. If I don't do it it thrown me "DBNull.Value" exception and application don't run correctly.
I'm using .NET CF 2.0, Visual Studio 2005, dotConnect Mobile for Oracle 5.0.20.2 (in VS2008 it happens rarely)