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(同一个世界,同一个梦想,交流学习C++Builder and Delphi XE10,传承c++builder and Delphi的魅力!欢迎各地朋友加入我的QQ群484979943,进群密码“BCB”,同时也请将该群号广为宣传,希望能够广集各方高手,共同进步。如需下载开发工具及源代码请加入我的QQ群。) 【阅读倡议】 1、有问题请留言; 2、没问题请点赞; 3、看连载请加群; 4、下源码请加群; 【开发工具】 1、C++Builder and Delphi 10.3.3 2、FMSoft_uniGUI_Complete_Professional_1.70.0.1531(正版) 本人主笔的国内第一本uniGUI教学案例代码已诞生,分为cbuilder和delphi两个版本,买代码送手册,需要的朋友可以加入我的QQ技术交流群484979943给我(群主)留言。资料简介: https://www.meipian.cn/20b86ayo?share_from=others&user_id=64168117&uuid=a8a75af8c0cc31e6a21b8a79a2b07398&share_depth=1&first_share_uid=64168117&utm_medium=meipian_android&share_user_mpuuid=94b70e99e8b6986c71b270a9883befb2 UniDBGrid支持列值汇总,可以对一个表格的数值型列做数据求和,很简单,只需要先将stu_score1和stu_score2两列的ShowSummary设置为True,再将UniDBGrid1的Summary属性的Enabled设置为True,再为UniDBGrid1的OnColumnSummary事件和OnClumnSummaryResult添加代码即可: 一、cbuilder版源代码 1、累加列值 void __fastcall TMainForm::UniDBGrid1ColumnSummary(TUniDBGridColumn *Column, Variant &GroupFieldValue) { if(Column->FieldName=="stu_score1") { if(Column->AuxValue.IsNull()) { Column->AuxValue=0.0; } Column->AuxValue=Column->AuxValue+Column->Field->AsFloat;//累加列值 } else if(Column->FieldName=="stu_score2") { if(Column->AuxValue.IsNull()) { Column->AuxValue=0.0; } Column->AuxValue=Column->AuxValue+Column->Field->AsFloat;//累加列值 } } 2、汇总结果 void __fastcall TMainForm::UniDBGrid1ColumnSummaryResult(TUniDBGridColumn *Column, Variant &GroupFieldValue, TUniCellAttribs *Attribs, UnicodeString &Result)
{ String score1,score2;
TFontStyles fontStyle(1);//fsBold 设置粗体
if(Column->FieldName=="stu_score1") { score1=Column->AuxValue; Result="语文总分:"+score1;//显示汇总结果 Attribs->Font->Style=fontStyle; Attribs->Font->Color=clGreen;//设置颜色 } else if(Column->FieldName=="stu_score2") { score2=Column->AuxValue; Result="数学总分:"+score2; //显示汇总结果 Attribs->Font->Style=fontStyle; Attribs->Font->Color=clGreen; } Column->AuxValue=NULL; } 二、delphi版源代码 1、累加列值 procedure TMainForm.UniDBGrid1ColumnSummary(Column: TUniDBGridColumn; GroupFieldValue: Variant); begin if SameText(Column.FieldName, 'stu_score1') then begin if Column.AuxValue=NULL then begin Column.AuxValue:=0;
end; Column.AuxValue:=Column.AuxValue + Column.Field.AsFloat;//累加列值 end else if SameText(Column.FieldName, 'stu_score2') then begin if Column.AuxValue=NULL then begin Column.AuxValue:=0.0; end; Column.AuxValue:=Column.AuxValue + Column.Field.AsFloat; end; end; 2、汇总结果 procedure TMainForm.UniDBGrid1ColumnSummaryResult(Column: TUniDBGridColumn; GroupFieldValue: Variant; Attribs: TUniCellAttribs; var Result: string); var I : Real; begin if SameText(Column.FieldName, 'stu_score1') then begin I:=Column.AuxValue; Result:=Format('语文总分 : %f', [I]);//显示小汇总 Attribs.Font.Style:=[fsBold]; Attribs.Font.Color:=clGreen; end else if SameText(Column.FieldName, 'stu_score2') then begin I:=Column.AuxValue; Result:=Format('数学总分 : %f', [I]); Attribs.Font.Style:=[fsBold]; Attribs.Font.Color:=clNavy; end; Column.AuxValue:=NULL; end;
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