英文:
User function for FastReports Pro VCL says "Too Many Actual Parameters" when using a C++ function
问题
我正在尝试设置FastReports Pro以使用用户函数解码字段。
在我的主窗体构造函数中，我设置了：
frxReport1->AddFunction(_D("void ChangeReportField(String fieldstr, String otherfieldstr)"));
在FastReports代码选项卡中使用C++Script，我有以下内容：
void MasterData1OnBeforePrint(TfrxComponent Sender)
{
ChangeReportField(<frxDBDataset1."Field1">, <frxDBDataset1."Field2">);
}
我还配置了TfrxReport组件的OnUserFunction事件：
Variant __fastcall TMainForm::frxReport1UserFunction(const UnicodeString MethodName, Variant &Params)
{ }
当我尝试运行报告时，我收到以下错误消息：
Too Many Actual Parameters
指向MasterData1OnBeforePrint()中的ChangeReportField(左括号。
我知道这个函数目前不做任何事情，因为它不返回任何值。一旦我真正让它工作（调用用户函数），我会解决这个问题。
我做错了什么？
英文:
I am trying to setup FastReports Pro to decode a field by using a user function.
In my main form constructor, I set:
frxReport1->AddFunction(_D("void ChangeReportField(String fieldstr, String otherfieldstr)"));
In the FastReports code tab using C++Script, I have:
void MasterData1OnBeforePrint(TfrxComponent Sender)
{
ChangeReportField(<frxDBDataset1."Field1">, <frxDBDataset1."Field2">);
}
I also have the OnUserFunction event of the TfrxReport component configured:
Variant __fastcall TMainForm::frxReport1UserFunction(const UnicodeString MethodName, Variant &Params)
{ }
When I try to run the report, I get this error message:
> Too Many Actual Parameters
pointing to the left parentheses of the ChangeReportField( in MasterData1OnBeforePrint()
I know this function currently doesn't do anything because it doesn't return a value. I'll get to that once I get it actually working (calling the user function).
What am I doing wrong?
答案1
得分: 2
当作为Pascal函数添加时，它可以工作：
frxReport1->AddFunction(_D("procedure ChangeReportField(fieldstr, otherfieldstr:String)"));
英文:
When added as a Pascal function, it works:
frxReport1->AddFunction(_D("procedure ChangeReportField(fieldstr, otherfieldstr:String)"));
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