Difference between revisions of "Zh/Documentation/DevGuide/ProUNO/Bridge/Conversion Mappings"

Latest revision as of 03:08, 14 May 2009

如上一节所示,Automation 类型在映射表中具有对应的 UNO 类型。如果一个 UNO 函数需要某个特定类型的参数,则可以提供相应的 Automation 类型。这并不总是必需的,因为桥也接受相似的类型。例如:

 //UNO IDL
 void func( long value);
 // VB
 Dim value As Byte
 value = 2
 obj.func valLong

下表显示各种 Automation 类型,以及如果没有传送所需的 UNO IDL 类型,如何将 Automation 类型转换为 UNO IDL 类型。

Automation IDL 类型(源)	UNO IDL 类型(目标)
boolean (true, false) unsigned char, short, long, float, double: 0 = false, > 0 = true string: "true" = true, "false" = false	boolean
boolean, unsigned char, short, long, float, double, string	byte
double, boolean, unsigned char, short, long, float, string	double
float, boolean, unsigned char, short, string	float
short, unsigned char, long, float, double, string	short
long, unsigned char, long, float, double, string	long
BSTR, boolean, unsigned char, short, long, float, double	string
short, boolean, unsigned char, long, float, double, string (1 character long)	char
long, boolean, unsigned char, short, float, double, string	enum

将一个字符串用于数值时,该字符串必须包含表示该值的适当字符串。

如果将浮点值用于整数值,这些值会被四舍五入。

使用的类型如果值空间大于 UNO 类型时要谨慎。不要提供超出值空间的参数,这会导致错误。例如:

 // UNO IDL
 void func([in] byte value);

 // VB 
 Dim value as Integer
 value= 1000
 obj.func value 'causes an error

转换映射只适用于参数,即从 Automation 环境到 UNO 函数的调用期间,直到该 UNO 函数接受参数。

Content on this page is licensed under the Public Documentation License (PDL).

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