一个Dotnet数据框架的bug

好久没写C#代码了,今天在维护公司老项目时,偶然发现一个BUG。记录一下,后面的同学就不要踩坑啦。

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该项目采用了一个国产的数据访问框架 PDF.NET ,但是我有一个表的主键是bigint,数据编号已经大于Int32.MaxValue,此时就不能再插入数据了。原因如下(红色部分转换报错):

 

internal static int InsertInner(EntityBase entity, List<string> objFields, CommonDB DB)
        {
            if (objFields == null || objFields.Count == 0)
                return 0;

            IDataParameter[] paras = new IDataParameter[objFields.Count];

            string tableName = entity.TableName;
            string identityName = entity.IdentityName;
            string sql = "INSERT INTO " + entity.GetSchemeTableName();
            string fields = "";
            string values = "";
            int index = 0;

            //获取实体属性信息缓存
            var entityFieldsCache = EntityFieldsCache.Item(entity.GetType());

            foreach (string field in objFields)
            {
                if (identityName != field)
                {
                    fields += ",[" + field + "]";
                    string paraName = DB.GetParameterChar + "P" + index.ToString();
                    values += "," + paraName;
                    paras[index] = DB.GetParameter(paraName, entity.PropertyList(field));

                    //从缓存中获取当前field所对应的类型
                    Type fieldType = entityFieldsCache.GetPropertyType(field);

                    if (fieldType == typeof(string) && paras[index].Value != null)
                        //为字符串类型的参数指定长度 edit at 2012.4.23
                        //((IDbDataParameter)paras[index]).Size = entity.GetStringFieldSize(field);
                         SetParameterSize(ref paras[index], entity, field,DB);
                    else if (fieldType == typeof(byte[]))
                        //为字节类型指定转换类型,防止空值时被当作字符串类型
                        paras[index].DbType = DbType.Binary;

                    index++;
                }
            }
            sql = sql + "(" + fields.TrimStart(',') + ") VALUES (" + values.TrimStart(',') + ")";

            int count = 0;

            if (identityName != "")
            {
                //有自增字段
                object id = entity.PropertyList(identityName);

                EntityCommand ec = new EntityCommand(entity, DB);
                string insertKey = ec.GetInsertKey();

                count = DB.ExecuteInsertQuery(sql, CommandType.Text, paras, ref id,insertKey);
                entity.setProperty(identityName, Convert.ToInt32(id));
            }
            else
            {
                count = DB.ExecuteNonQuery(sql, CommandType.Text, paras);
            }
            if (count > 0)
                entity.ResetChanges();

            return count;

        }

 

该bug已经给作者说了,期待他们的及时修复。

 

posted @ 2017-05-09 15:54  小八路  阅读(248)  评论(0编辑  收藏  举报