Fastreport报表合并单元格技巧.doc

Fastreport报表合并单元格技巧
在做企业的ERP,SCM,CRM等等的软件中, 经常要做的就是报表, 如财务报表, 生产车间报表。很多时候企业可能对报表格式提出特别的要求，但作为软件开发公司，能设计开发出符合客户要求的报表就显得十分迫切。以下我对报表的合并技巧作一个总结，希望对后面要做类似报表的同事有些帮助。

合并报表1：江苏美的春花电器股价有限公司-委外加工材料月结表
在没有合并之前显示如下：

在对供应商编码和材料编码进行合并后显示如下：

对于合并功能，其实fastreport是有的，但这个功能做得远远不够，不能按客户的要求进行合并，要完成上述功能，我是通过下面的方法做出来的。

这种要求的合并要结合Delphi与Fastreport来协作完成。首先然前台Delphi相应方法中编写有关的算法，然后在Fastreport中根据这种算法作相应的显示。

操作方法如下：
1． 选中Fastreport的主数据项，双击OnBeforePrint方法，在begin end 之间编写代码：

1． MainData.Height：为每行数据显示的高度，
2． [CLTAutoreporthead_AutoreportlineOfAutoreporthead."Flag"]：表示要合并的行数（Delphi算法），
3．memo7.visible：是否显示单元格，[CLTAutoreporthead_AutoreportlineOfAutoreporthead."Search_Flag"]=2：（Delphi算法），

只要在Delphi中把要合并的行数与列用字段Flag(控制行数)，Search_Flag（控制是否可见,2为可见）算出来，再在FastReport中显示出来，那么合并功能就算搞好。

以下是在Delphi中的合并算法代码：

function TAutoReportProcessMonthForm.GetFastRptObj: TBizObject;
var
BizHead,BizLineTBizObject;
i,j,k,n,m,p:Integer;
Head:TAutoreporthead;
Line:TAutoreportline;
slItemVendor,slVendors:TStringList;
strItemVendor,strItemVendor2,strVendor:String;
VendorsCount:array of Integer;
begin
MyCheck;

Head:=TAutoreporthead.Create(false,true);
Head.UserName:=LoginUser.UserName;

for i:=1 to dgView.RowCount-1 do
if dgView.RowProps[i].Checked and (not dgView.IsRowEmpty(i))then
begin
Line:=TAutoreportline.Create;
self.SetDgDataToBizObject(i,dgView,TBizObject(line));
head.AutoreportlineOfAutoreporthead.Add(line);
end;

//合并报表算法开始 added by wbc, 2009-04-23
slItemVendor:=TStringList.Create;
slVendors:=TStringList.Create;
for i:=0 to head.AutoreportlineOfAutoreporthead.Count-1 do
begin
strItemVendor:=TAutoreportline(head.AutoreportlineOfAutoreporthead.Items[i]).Item_Code+TAutoreportline(head.AutoreportlineOfAutoreporthead.Items[i]).Vendor_Code;
if Pos(strItemVendor,slItemVendor.Text)=0 then
slItemVendor.Add(strItemVendor);

strVendor:=TAutoreportline(head.AutoreportlineOfAutoreporthead.Items[i]).Vendor_Code;
if Pos(strVendor,slVendors.Text)=0 then
slVendors.Add(strVendor);

end;

//showMessage(slVendors.Text);

setLength(VendorsCount,slVendors.Count);
for i:=0 to slVendors.Count-1 do
begin
VendorsCount[i]:=0;
for j:=0 to head.AutoreportlineOfAutoreporthead.Count-1 do
if sameText(slVendors.Strings[i],TAutoreportline(head.AutoreportlineOfAutoreporthead.Items[j]).Vendor_Code) then
begin
VendorsCount[i]:=VendorsCount[i]+1;
end;
end;

setLength(MyVendors,slVendors.Count);
for i:=0 to slVendors.Count-1 do
begin
MyVendors[i]:=TMyVendor.Create;
MyVendors[i].Vendor_Code:=slVendors.Strings[i];
setLength(MyVendors[i].XVendors,VendorsCount[i]);
n:=0;
for j:=0 to head.AutoreportlineOfAutoreporthead.Count-1 do
if sameText(slVendors.Strings[i],TAutoreportline(head.AutoreportlineOfAutoreporthead.Items[j]).Vendor_Code) then
begin
MyVendors[i].XVendors[n]:=TXVendor.Create;
MyVendors[i].XVendors[n].index:=j;
//MyVendors[i].XVendors[n].flag:=MyVendors[i].XVendors[n].flag+1;
//MyVendors[i].XVendors[n].search_flag:=0;
n:=n+1;
end;
end;

for i:=0 to head.AutoreportlineOfAutoreporthead.Count-1 do
begin
n:=0;
strItemVendor:=TAutoreportline(head.AutoreportlineOfAutoreporthead.Items[i]).Item_Code+TAutoreportline(head.AutoreportlineOfAutoreporthead.Items[i]).Vendor_Code;
for j:=i to head.AutoreportlineOfAutoreporthead.Count-1 do
begin
strItemVendor2:=TAutoreportline(head.AutoreportlineOfAutoreporthead.Items[j]).Item_Code+TAutoreportline(head.AutoreportlineOfAutoreporthead.Items[j]).Vendor_Code;
if sameText(strItemVendor,strItemVendor2) then
n:=n+1;
end;

TAutoreportline(head.AutoreportlineOfAutoreporthead.Items[i]).Flag:=n;
for k:=0 to slVendors.Count-1 do
for m:=0 to length(MyVendors[k].XVendors)-1 do
if MyVendors[k].xVendors[m].index=i then
MyVendors[k].xVendors[m].flag:=n;
end;

//Search_Flag: 2 报表行可见,1不可见.
for i:=0 to slVendors.Count-1 do
begin //for i
if length(MyVendors[i].xVendors)<=27 then
begin
for j:=0 to length(MyVendors[i].xVendors)-1 do
begin//for j
if MyVendors[i].XVendors[j].search_flag=0 then
MyVendors[i].XVendors[j].search_flag:=2;

if MyVendors[i].XVendors[j].flag>1 then
for k:=1 to MyVendors[i].XVendors[j].flag-1 do
MyVendors[i].XVendors[j+k].search_flag:=1;
end;//for j
end else
begin
for j:=0 to length(MyVendors[i].xVendors)-1 do
begin//for j
if MyVendors[i].XVendors[j].search_flag=0 then
MyVendors[i].XVendors[j].search_flag:=2;

if j mod 27 =0 then
MyVendors[i].XVendors[j].search_flag:=2;

p:=MyVendors[i].XVendors[j].flag;
n:=0;

for k:=1 to MyVendors[i].XVendors[j].flag-1 do
if MyVendors[i].XVendors[j+k].Search_Flag=0 then
if (j+k) mod 27=0 then
begin
MyVendors[i].XVendors[j+k].Search_Flag:=2;
MyVendors[i].XVendors[j+k].flag:=p-k;

if n=0 then
begin
MyVendors[i].XVendors[j].flag:=k;
n:=1;
end;
end else
begin
MyVendors[i].XVendors[j+k].Search_Flag:=1;
end;

end;//for j
end;
end; //for i

for i:=0 to slVendors.Count-1 do
begin //for i
for j:=0 to length(MyVendors[i].xVendors)-1 do
begin//for j
TAutoreportline(head.AutoreportlineOfAutoreporthead.Items[MyVendors[i].xVendors[j].index]).Flag:=MyVendors[i].xVendors[j]flag;
TAutoreportline(head.AutoreportlineOfAutoreporthead.Items[MyVendors[i].xVendors[j].index]).Search_Flag:=MyVendors[i].xVendors[j].search_flag;
//showMessage(inttostr(MyVendors[i].xVendors[j].index)+':flag='+inttostr(MyVendors[i].xVendors[j].flag)+#13#10+inttostr(MyVendors[i].xVendors[j].index)+':search_flag='+inttostr(MyVendors[i].xVendors[j].search_flag));
end;//for j;
end;//for i

//合并报表算法结束 added by wbc, 2009-04-23

result:=Head;
end;

涉及的数据类型：
type
TXVendor=class
index:Integer;
flag:Integer;
search_flag:Integer;
end;

TMyVendor=class
public
Vendor_Code:String;
xVendors:array of TXVendor;
end;

MyVendors:array of TMyVendor;

合并报表2:模具工厂—供方送货单

操作步骤:
同样方法, 选中Fastreport的主数据项，双击OnBeforePrint方法，在begin end 之间编写代码：

if Pos('模具工厂',[PriseName])=0 then
begin
if (IsBegin=1) then
begin
Memo19.Height:=MainData.Height*5;
Memo19.Visible:=true;
memo20.Height:=MainData.Height*5;
memo20.Visible:=true;
memo21.Height:=MainData.Height*5;
memo21.Visible:=true;
IsBegin:=0;
end else
begin
Memo19.Height:=MainData.Height;
Memo19.Visible:=false;
//Memo19.Top:=-18;
memo20.Height:=MainData.Height;
memo20.Visible:=false;
memo21.Height:=MainData.Height;
memo21.Visible:=false;
IsBegin:=0;
end;
end else
begin
Memo34.visible:=true;
Memo42.visible:=True;
end;

这个合并相对前面的合并显得更简单, 只要通过PriseName这个Delphi传来的参数就能够实行按物料编码合并.
PriseName这个参数可能通过frGetValue这个方法传入Fastreport. (注意大小写,Fastreport对大小写参数是敏感的)
procedure TAutoReportProcessMonthForm.frGetValue(const ParName: String;
var ParValue: Variant);
begin
inherited;
if parname = 'PriseName' then
parvalue := LoginUser.Enterprise_Name;

if parname = 'Company_Name' then
parvalue :=Loginuser.GetSysConfParam('Company_Name');

if parname = 'Print_Date' then
parvalue :=DatetimeToStr(variables.SysServerTime);

end;

以后要开发类似合并报表的话，可以参照上述算法，根据要合并的字段进行相应修改即可达到客户报表的要求。希望本篇技术文档对读者有帮助。
作者：王北成
日期：2009-4-28
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