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Asked: 2026-05-10T21:39:03+00:00

I’m trying to pass a null value for the first parameter in the code

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I’m trying to pass a null value for the first parameter in the code below, but MySQL complains that 

 Incorrect number of arguments for PROCEDURE myProc; expected 2, got 1

When I manually call the procedure with the first argument as null, it works, but when EmptyAsNullStartsWith(employeeNumberText.Text) returns null, it complains. 

Database db = DatabaseFactory.CreateDatabase(   ConfigurationManager.AppSettings['dbType'] ); DbCommand cmd = db.GetStoredProcCommand('staff_listforinquiry'); db.AddeParameter(   cmd,    'in_employeeNumber',    DbType.String,    EmptyAsNullStartsWith(employeeNumberText.Text) ); db.AddeParameter(   cmd,    'in_name',    DbType.String,    EmptyAsNullContains(employeeNameText.Text) );
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1 Answer

  1. Did you try having EmptyAsNullContains(employeeNameText.Text) return DBNull instead of regular null?

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