/// <summary>
/// 确定指定的 Object 是否等于当前的 Object。
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public override bool Equals(object obj)
{
if (obj == null)
{
return(false);
}
XTable table = obj as XTable;
if (table == null)
{
return(false);
}
if (this.Name != table.Name)
{
return(false);
}
if (this.Readme != table.Readme)
{
return(false);
}
if (this.IsView != table.IsView)
{
return(false);
}
//比较字段
List <XField> list1 = new List <XField>(Fields);
List <XField> list2 = new List <XField>(table.Fields);
foreach (XField item in list1)
{
XField match = null;
//在第二个列表里面找该字段
foreach (XField elm in list2)
{
if (item == elm)
{
match = elm;
break;
}
}
//如果找不到，表明第二个列表没有该字段
if (match == null)
{
return(false);
}
list2.Remove(match);
}
//如果第二个列表还不为空，表明字段数不对应
if (list2.Count > 0)
{
return(false);
}
return(true);
}
/// <summary>
/// 确定指定的 Object 是否等于当前的 Object。
/// </summary>
/// <param name="obj"></param>
/// <returns></returns>
public override bool Equals(object obj)
{
if (obj == null)
{
return(false);
}
XField field = obj as XField;
if (field == null)
{
return(false);
}
if (this.Name != field.Name)
{
return(false);
}
if (this.FieldType != field.FieldType)
{
return(false);
}
if (this.Identity != field.Identity)
{
return(false);
}
if (this.PrimaryKey != field.PrimaryKey)
{
return(false);
}
if (this.Length != field.Length)
{
return(false);
}
if (this.NumOfByte != field.NumOfByte)
{
return(false);
}
if (this.Digit != field.Digit)
{
return(false);
}
if (this.Nullable != field.Nullable)
{
return(false);
}
if (this.Default != field.Default)
{
return(false);
}
if (this.Readme != field.Readme)
{
return(false);
}
return(true);
}
//private DataTable allfields;
/// <summary>
/// 取得指定表的所有列构架
/// </summary>
/// <param name="xt"></param>
/// <returns></returns>
protected override XField[] GetFields(XTable xt)
{
//if (allfields == null) allfields = Query(SchemaSql).Tables[0];
DataTable allfields = Query(String.Format(SchemaSql, xt.Name)).Tables[0];
if (allfields == null)
{
return(base.GetFields(xt));
}
List <XField> list = new List <XField>();
//DataRow[] drs = allfields.Select("表名='" + xt.Name + "'", "字段序号");
//if (drs == null || drs.Length < 1) return base.GetFields(xt);
if (allfields.Rows == null || allfields.Rows.Count < 1)
{
return(base.GetFields(xt));
}
List <String> pks = GetPrimaryKeys(xt);
List <Dictionary <String, String> > fks = GetForeignKeys(xt);
foreach (DataRow dr in allfields.Rows)
{
XField xf = new XField();
xf.ID = Int32.Parse(dr["字段序号"].ToString());
xf.Name = dr["字段名"].ToString();
xf.FieldType = FieldTypeToClassType(dr["类型"].ToString());
xf.Identity = Boolean.Parse(dr["标识"].ToString());
//xf.PrimaryKey = pks != null && pks.Contains(xf.Name);
xf.PrimaryKey = Boolean.Parse(dr["主键"].ToString());
xf.ForeignKey = false;
xf.ForeignTableName = "";
xf.ForeignTablePrimaryName = "";
if (fks != null)
{
foreach (Dictionary <String, String> dic in fks)
{
if (dic["FK_COLUMN_NAME"] == xf.Name)
{
xf.ForeignKey = true;
xf.ForeignTableName = dic["PK_TABLE_NAME"];
xf.ForeignTablePrimaryName = dic["PK_COLUMN_NAME"];
break;
}
}
}
xf.Length = Int32.Parse(dr["长度"].ToString());
xf.NumOfByte = Int32.Parse(dr["占用字节数"].ToString());
xf.Digit = Int32.Parse(dr["小数位数"].ToString());
xf.Nullable = Boolean.Parse(dr["允许空"].ToString());
xf.Default = dr["默认值"].ToString();
xf.Readme = dr["字段说明"].ToString();
list.Add(xf);
}
return(list.ToArray());
}
/// <summary>
/// 取得指定表的所有列构架
/// </summary>
/// <param name="xt"></param>
/// <returns></returns>
protected virtual XField[] GetFields(XTable xt)
{
DataTable dt = GetSchema("Columns", new String[] { null, null, xt.Name });
List <XField> list = new List <XField>();
DataRow[] drs = dt.Select("", "ORDINAL_POSITION");
List <String> pks = GetPrimaryKeys(xt);
List <Dictionary <String, String> > fks = GetForeignKeys(xt);
foreach (DataRow dr in drs)
{
XField xf = new XField();
xf.ID = Int32.Parse(dr["ORDINAL_POSITION"].ToString());
xf.Name = dr["COLUMN_NAME"].ToString();
xf.FieldType = FieldTypeToClassType(dr["DATA_TYPE"].ToString());
xf.Identity = dr["DATA_TYPE"].ToString() == "3" && (dr["COLUMN_FLAGS"].ToString() == "16" || dr["COLUMN_FLAGS"].ToString() == "90");
xf.PrimaryKey = pks != null && pks.Contains(xf.Name);
xf.ForeignKey = false;
xf.ForeignTableName = "";
xf.ForeignTablePrimaryName = "";
if (fks != null)
{
foreach (Dictionary <String, String> dic in fks)
{
if (dic["FK_COLUMN_NAME"] == xf.Name)
{
xf.ForeignKey = true;
xf.ForeignTableName = dic["PK_TABLE_NAME"];
xf.ForeignTablePrimaryName = dic["PK_COLUMN_NAME"];
break;
}
}
}
if (xf.FieldType == "Int32" || xf.FieldType == "Double")
{
xf.Length = dr["NUMERIC_PRECISION"] == DBNull.Value ? 0 : Int32.Parse(dr["NUMERIC_PRECISION"].ToString());
xf.NumOfByte = 0;
xf.Digit = dr["NUMERIC_SCALE"] == DBNull.Value ? 0 : Int32.Parse(dr["NUMERIC_SCALE"].ToString());
}
else if (xf.FieldType == "DateTime")
{
xf.Length = dr["DATETIME_PRECISION"] == DBNull.Value ? 0 : Int32.Parse(dr["DATETIME_PRECISION"].ToString());
xf.NumOfByte = 0;
xf.Digit = 0;
}
else
{
if (dr["DATA_TYPE"].ToString() == "130" && dr["COLUMN_FLAGS"].ToString() == "234") //备注类型
{
xf.Length = Int32.MaxValue;
xf.NumOfByte = Int32.MaxValue;
}
else
{
xf.Length = dr["CHARACTER_MAXIMUM_LENGTH"] == DBNull.Value ? 0 : Int32.Parse(dr["CHARACTER_MAXIMUM_LENGTH"].ToString());
xf.NumOfByte = dr["CHARACTER_OCTET_LENGTH"] == DBNull.Value ? 0 : Int32.Parse(dr["CHARACTER_OCTET_LENGTH"].ToString());
}
xf.Digit = 0;
}
try
{
xf.Nullable = Boolean.Parse(dr["IS_NULLABLE"].ToString());
}
catch
{
xf.Nullable = dr["IS_NULLABLE"].ToString() == "YES";
}
try
{
xf.Default = dr["COLUMN_HASDEFAULT"].ToString() == "False" ? "" : dr["COLUMN_DEFAULT"].ToString();
}
catch
{
xf.Default = dr["COLUMN_DEFAULT"].ToString();
}
try
{
xf.Readme = dr["DESCRIPTION"] == DBNull.Value ? "" : dr["DESCRIPTION"].ToString();
}
catch
{
xf.Readme = "";
}
list.Add(xf);
}
return(list.ToArray());
}
