382 lines
10 KiB
C#
382 lines
10 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Data;
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using CYQ.Data.SQL;
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using CYQ.Data.Orm;
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using CYQ.Data.Tool;
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using CYQ.Data.Json;
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namespace CYQ.Data.Table
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{
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/// <summary>
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/// 列结构修选项
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/// </summary>
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[Flags]
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public enum AlterOp
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{
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/// <summary>
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/// 默认不修改状态
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/// </summary>
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None = 0,
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/// <summary>
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/// 添加或修改状态
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/// </summary>
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AddOrModify = 1,
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/// <summary>
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/// 删除列状态
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/// </summary>
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Drop = 2,
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/// <summary>
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/// 重命名列状态
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/// </summary>
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Rename = 4
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}
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/// <summary>
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/// 单元结构属性
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/// </summary>
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public partial class MCellStruct
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{
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private MDataColumn _MDataColumn = null;
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/// <summary>
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/// 结构集合
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/// </summary>
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[JsonIgnore]
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public MDataColumn MDataColumn
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{
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get
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{
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return _MDataColumn;
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}
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internal set
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{
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_MDataColumn = value;
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}
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}
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/// <summary>
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/// 是否忽略Json转换
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/// </summary>
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[JsonIgnore]
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public bool IsJsonIgnore { get; set; }
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private string _TableName;
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/// <summary>
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/// 表名
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/// </summary>
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[JsonIgnore]
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public string TableName
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{
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get
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{
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if (string.IsNullOrEmpty(_TableName) && _MDataColumn != null)
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{
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return _MDataColumn.TableName;
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}
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return _TableName;
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}
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set { _TableName = value; }
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}
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/// <summary>
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/// 外键表名
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/// </summary>
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[JsonIgnore]
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public string FKTableName { get; set; }
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/// <summary>
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/// 旧的列名（AlterOp为Rename时可用）
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/// </summary>
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[JsonIgnore]
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public string OldName { get; set; }
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private string _ColumnName = string.Empty;
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/// <summary>
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/// 列名
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/// </summary>
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public string ColumnName
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{
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get
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{
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return _ColumnName;
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}
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set
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{
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_ColumnName = value;
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if (_MDataColumn != null)
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{
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_MDataColumn.IsNeedRefleshIndex = true;//列名已变更，存储索引也需要变更
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}
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}
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}
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/// <summary>
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/// 字段描述
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/// </summary>
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public string Description { get; set; }
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/// <summary>
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/// 是否关键字
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/// </summary>
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public bool IsPrimaryKey { get; set; }
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/// <summary>
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/// 是否自增加
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/// </summary>
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public bool IsAutoIncrement { get; set; }
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/// <summary>
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/// 是否允许为Null
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/// </summary>
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public bool IsCanNull { get; set; }
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/// <summary>
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/// 是否唯一索引
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/// </summary>
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public bool IsUniqueKey { get; set; }
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/// <summary>
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/// 是否外键
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/// </summary>
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public bool IsForeignKey { get; set; }
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private object _DefaultValue;
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/// <summary>
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/// 默认值
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/// </summary>
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public object DefaultValue
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{
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get { return _DefaultValue; }
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set
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{
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DataGroupType group = DataType.GetGroup(SqlType);
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if (group == DataGroupType.Number || group == DataGroupType.Bool)
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{
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string defaultValue = Convert.ToString(value);
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if (!string.IsNullOrEmpty(defaultValue) && (defaultValue[0] == 'N' || defaultValue[0] == '('))
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{
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defaultValue = defaultValue.Trim('N', '(', ')');//处理int型默认值（1）带括号的问题。
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}
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_DefaultValue = defaultValue;
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}
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else
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{
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_DefaultValue = value;
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}
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}
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}
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private SqlDbType _SqlType;
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/// <summary>
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/// SqlDbType类型
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/// </summary>
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[JsonEnumToString]
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public SqlDbType SqlType
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{
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get
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{
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return _SqlType;
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}
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set
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{
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_SqlType = value;
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//ValueType = DataType.GetType(_SqlType, DalType,SqlTypeName);
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}
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}
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/// <summary>
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/// 最大字节
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/// </summary>
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public int MaxSize { get; set; }
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/// <summary>
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/// 精度（小数位）
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/// </summary>
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public short Scale { get; set; }
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/// <summary>
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/// 原始的数据库字段类型名称
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/// </summary>
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internal string SqlTypeName { get; set; }
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[NonSerialized]
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internal Type valueType;
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internal Type ValueType
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{
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get
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{
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if (valueType == null)
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{
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valueType = DataType.GetType(_SqlType, DalType, SqlTypeName);
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}
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return valueType;
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}
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}
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private DataBaseType dalType = DataBaseType.None;
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internal DataBaseType DalType
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{
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get
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{
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if (_MDataColumn != null)
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{
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return _MDataColumn.DataBaseType;
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}
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return dalType;
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}
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}
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private AlterOp _AlterOp = AlterOp.None;
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/// <summary>
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/// 列结构改变状态
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/// </summary>
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[JsonIgnore]
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public AlterOp AlterOp
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{
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get { return _AlterOp; }
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set { _AlterOp = value; }
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}
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internal int _ReaderIndex = -1;
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//内部使用的索引，在字段名为空时使用
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internal int ReaderIndex
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{
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get
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{
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if (_ReaderIndex == -1 && _MDataColumn != null)
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{
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return _MDataColumn.GetIndex(this.ColumnName);
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}
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return _ReaderIndex;
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}
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set
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{
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_ReaderIndex = value;
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}
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}
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#region 构造函数
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internal MCellStruct(DataBaseType dalType)
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{
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this.dalType = dalType;
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}
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public MCellStruct(string columnName, SqlDbType sqlType)
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{
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Init(columnName, sqlType, false, true, false, -1, null);
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}
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public MCellStruct(string columnName, SqlDbType sqlType, bool isAutoIncrement, bool isCanNull, int maxSize)
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{
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Init(columnName, sqlType, isAutoIncrement, isCanNull, false, maxSize, null);
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}
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internal void Init(string columnName, SqlDbType sqlType, bool isAutoIncrement, bool isCanNull, bool isPrimaryKey, int maxSize, object defaultValue)
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{
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ColumnName = columnName.Trim();
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SqlType = sqlType;
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IsAutoIncrement = isAutoIncrement;
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IsCanNull = isCanNull;
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MaxSize = maxSize;
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IsPrimaryKey = isPrimaryKey;
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DefaultValue = defaultValue;
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}
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internal void Load(MCellStruct ms)
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{
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ColumnName = ms.ColumnName;
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SqlTypeName = ms.SqlTypeName;
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SqlType = ms.SqlType;
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IsAutoIncrement = ms.IsAutoIncrement;
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IsCanNull = ms.IsCanNull;
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MaxSize = ms.MaxSize;
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Scale = ms.Scale;
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IsPrimaryKey = ms.IsPrimaryKey;
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IsUniqueKey = ms.IsUniqueKey;
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IsForeignKey = ms.IsForeignKey;
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FKTableName = ms.FKTableName;
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AlterOp = ms.AlterOp;
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IsJsonIgnore = ms.IsJsonIgnore;
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if (ms.DefaultValue != null)
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{
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DefaultValue = ms.DefaultValue;
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}
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if (!string.IsNullOrEmpty(ms.Description))
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{
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Description = ms.Description;
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}
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}
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/// <summary>
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/// 克隆一个对象。
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/// </summary>
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/// <returns></returns>
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public MCellStruct Clone()
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{
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MCellStruct ms = new MCellStruct(dalType);
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ms.ColumnName = ColumnName;
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ms.SqlTypeName = SqlTypeName;
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ms.SqlType = SqlType;
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ms.IsAutoIncrement = IsAutoIncrement;
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ms.IsCanNull = IsCanNull;
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ms.MaxSize = MaxSize;
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ms.Scale = Scale;
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ms.IsPrimaryKey = IsPrimaryKey;
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ms.IsUniqueKey = IsUniqueKey;
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ms.IsForeignKey = IsForeignKey;
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ms.FKTableName = FKTableName;
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ms.DefaultValue = DefaultValue;
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ms.Description = Description;
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ms.MDataColumn = MDataColumn;
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ms.AlterOp = AlterOp;
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ms.TableName = TableName;
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ms.IsJsonIgnore = IsJsonIgnore;
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return ms;
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}
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#endregion
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}
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public partial class MCellStruct // 扩展几个常用方法
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{
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/// <summary>
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/// 为列的所有行设置值
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/// </summary>
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public MCellStruct Set(object value)
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{
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Set(value, -1);
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return this;
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}
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public MCellStruct Set(object value, int state)
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{
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if (_MDataColumn != null)
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{
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MDataTable dt = _MDataColumn._Table;
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if (dt != null && dt.Rows.Count > 0)
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{
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int index = _MDataColumn.GetIndex(ColumnName);
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for (int i = 0; i < dt.Rows.Count; i++)
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{
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dt.Rows[i].Set(index, value, state);
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}
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}
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}
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return this;
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}
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/// <summary>
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/// 返回该列的where In 条件 : Name in("aa","bb")
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/// </summary>
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/// <returns></returns>
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public string GetWhereIn()
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{
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if (_MDataColumn != null)
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{
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MDataTable dt = _MDataColumn._Table;
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if (dt != null && dt.Rows.Count > 0)
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{
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List<string> items = dt.GetColumnItems<string>(ColumnName, BreakOp.NullOrEmpty, true);
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if (items != null && items.Count > 0)
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{
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return SqlCreate.GetWhereIn(this, items, dalType);
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}
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}
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}
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return string.Empty;
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}
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}
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}
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