System.Data.Common.DbDataAdapter.ParameterInput C# (CSharp) Method

        private void ParameterInput(IDataParameterCollection parameters, StatementType typeIndex, DataRow row, DataTableMapping mappings)
        {
            Data.MissingMappingAction missingMapping = UpdateMappingAction;
            Data.MissingSchemaAction missingSchema = UpdateSchemaAction;

            foreach (IDataParameter parameter in parameters)
            {
                if ((null != parameter) && (0 != (ParameterDirection.Input & parameter.Direction)))
                {
                    string columnName = parameter.SourceColumn;
                    if (!string.IsNullOrEmpty(columnName))
                    {
                        DataColumn dataColumn = mappings.GetDataColumn(columnName, null, row.Table, missingMapping, missingSchema);
                        if (null != dataColumn)
                        {
                            DataRowVersion version = DbDataAdapter.GetParameterSourceVersion(typeIndex, parameter);
                            parameter.Value = row[dataColumn, version];
                        }
                        else
                        {
                            parameter.Value = null;
                        }

                        DbParameter dbparameter = (parameter as DbParameter);
                        if ((null != dbparameter) && dbparameter.SourceColumnNullMapping)
                        {
                            Debug.Assert(DbType.Int32 == parameter.DbType, "unexpected DbType");
                            parameter.Value = ADP.IsNull(parameter.Value) ? s_parameterValueNullValue : s_parameterValueNonNullValue;
                        }
                    }
                }
            }
        }