RddFieldInfo 类 |  |
Helper class for the RDD system to store field information
继承层次命名空间： XSharp.RDD.Support
程序集： XSharp.Core (在 XSharp.Core.dll 中) 版本：2.22 GA
语法RddFieldInfo 类型公开以下成员。
构造函数| 名称 | 说明 | |
|---|---|---|
 | RddFieldInfo(RddFieldInfo) | Construct a RddFieldInfo object. |
| RddFieldInfo(String, String, Int32, Int32, Int32) | Construct a RddFieldInfo object. |
| RddFieldInfo(String, DbFieldType, Int32, Int32, Int32, DBFFieldFlags) | Construct a RddFieldInfo object. |
属性| 名称 | 说明 | |
|---|---|---|
 | CanSort | Can the field be sorted? |
| Caption | Dynamic property for the Caption. Read from the VFP properties collection. |
| ColumnName | Dynamic property for the ColumnName. Read from the VFP properties collection. |
| DefaultValue | Dynamic property for the DefaultValue. Read from the VFP properties collection. |
| Description | Dynamic property for the Description. Read from the VFP properties collection. |
| FieldTypeFlags | FieldType as a string |
| FieldTypeStr | Field type as 1 character string. |
| Format | Dynamic property for the Format. Read from the VFP properties collection. |
| HasProperties | Does the field have properties. |
| InputMask | Dynamic property for the InputMask. Read from the VFP properties collection. |
| IsAutoIncrement | Is it an autoincrement ? |
| IsBinary | Is it binary ? |
| IsCompressed | Is it a compressed field (not implemented yet) ? |
| IsEncrypted | Is it an encryped field (not implemented yet)? |
| IsMemo | Is it a memo ? |
| IsNullable | Is it nullable ? |
| IsStandard | Is it a standard Dbase 3 field (CDLMN) ? |
| IsUnicode | Is it a unicode text ? |
| IsUnique | Dynamic property for the IsUnique. Read from the VFP properties collection. |
| IsVarLength | Is it a variable length field ? |
| IsVfp | Is it a VFP extended field ? |
| PrimaryKey | Dynamic property for the PrimaryKey. Read from the VFP properties collection. |
| Properties | Dynamic list of optional properties, such as Caption, Description. |
| RuleExpression | Dynamic property for the RuleExpression. Read from the VFP properties collection. |
| RuleText | Dynamic property for the RuleText. Read from the VFP properties collection. |
方法| 名称 | 说明 | |
|---|---|---|
| BlankValue | Return the blank (non null) value of the column. |
| Clone | Clone a RddFieldInfo object. |
| CopyValues | Copy values from one object to another. |
 | FindType | |
| SameType | Check if two fields match in type, length and decimals. |
| ToString | (重写 ToString.) |
| Validate | Validate combinations of type, length and decimals. |
字段| 名称 | 说明 | |
|---|---|---|
 | Alias | Alternative name, no length limit. This is the Caption for VFP fields |
| Decimals | Decimal positions |
| FieldType | Field Type |
| Flags | Flags, such as Nullable, AutoIncrement, Binary etc. |
| Length | Physical length in the table |
| Name | Name, normally max 10 characters |
| NextValue | Next key for autoincrement columns. |
| Offset | Offset in the record buffer for DBF fields. |
| Ordinal | 1 based Ordinal position in the RDD. |
| StepValue | Step value for autoincrement columns. |
参见