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Nullable addinparameter
I would suggest something like this: db.AddInParameter(dbCommand, Some_Value , DbType.Decimal, CheckDecimalForNull(LongTermCash); The ADO.NET code isn't really important, but in your Database Access code, you should. I don't know VB.Net verry well, but I don't see in your code example where you add your sql parameters. This is an example of how I do it in C : if(contactDTO.LockoutDateTime == ConstantsDB.NullDateTime) cmd.AddInParameter. SqlParameter with Nullable value give error while ExecuteNonQuery? up vote 19 down vote favorite 1 I have an sql query that has a parameter that can be null in the database (Sql Server). The update method work fine until that user. This C example program uses a nullable DateTime instance. Nullable DateTimes can be null. Nullable DateTime. A nullable DateTime can be null. The DateTime struct itself does not provide a null option. But the DateTime? AddInParameter. This method passes an input parameter to a stored procedure. AddOutParameter. This method adds an output parameter to a stored procedure. GetParameterValue. This method finds the value of the specified. This is very simple, In DataBase for that you have to set Allow null= true in Table field. means you have to set allow null for that column in database table. In front end-You have to use Nullable types for getting value from database. DbCommand insert = db.GetSqlStringCommand(sqlString); db.AddInParameter(insert, CustomerID , DbType.Int32, 1); db.AddInParameter(insert, CompanyName , DbType.String, test The SQL used to create the table is as. I have problems inserting a null paramater with the AddInParameter method. cmd.AddInParameter(someString, someValueWhichCanBeNULL) As soon as the 2nd param is null, it fails. I also Tried. Use the overload of AddInParameter. I don't know VB.Net verry well, but I don't see in your code example where you add your sql parameters. This is an example of how I do it in C : if(contactDTO.LockoutDateTime == ConstantsDB.NullDateTime) cmd.AddInParameter. c nullable types as parameters - Discussion of open issues, suggestions and bugs regarding ADO.NET provider for PostgreSQL. Does the Enterprise Library Data Access Block provider support c nullable types as parameters to.
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