System.Data.SqlClient.SqlParameter.Validate C# (CSharp) Méthode

        internal void Validate(int index, bool isCommandProc)
        {
            MetaType metaType = GetMetaTypeOnly();
            _internalMetaType = metaType;

            // NOTE: (General Criteria): SqlParameter does a Size Validation check and would fail if the size is 0. 
            //                           This condition filters all scenarios where we view a valid size 0.
            if (ADP.IsDirection(this, ParameterDirection.Output) &&
                !ADP.IsDirection(this, ParameterDirection.ReturnValue) &&
                (!metaType.IsFixed) &&
                !ShouldSerializeSize() &&
                ((null == _value) || (_value == DBNull.Value)) &&
                (SqlDbType != SqlDbType.Timestamp) &&
                (SqlDbType != SqlDbType.Udt) &&
                // Output parameter with size 0 throws for XML, TEXT, NTEXT, IMAGE.
                (SqlDbType != SqlDbType.Xml) &&
                !metaType.IsVarTime)
            {
                throw ADP.UninitializedParameterSize(index, metaType.ClassType);
            }

            if (metaType.SqlDbType != SqlDbType.Udt && Direction != ParameterDirection.Output)
            {
                GetCoercedValue();
            }


            // Validate structured-type-specific details.
            if (metaType.SqlDbType == SqlDbType.Structured)
            {
                if (!isCommandProc && string.IsNullOrEmpty(TypeName))
                    throw SQL.MustSetTypeNameForParam(metaType.TypeName, this.ParameterName);

                if (ParameterDirection.Input != this.Direction)
                {
                    throw SQL.UnsupportedTVPOutputParameter(this.Direction, this.ParameterName);
                }

                if (DBNull.Value == GetCoercedValue())
                {
                    throw SQL.DBNullNotSupportedForTVPValues(this.ParameterName);
                }
            }
            else if (!string.IsNullOrEmpty(TypeName))
            {
                throw SQL.UnexpectedTypeNameForNonStructParams(this.ParameterName);
            }
        }