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【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

在做报表时，有时候需要按照某个字段，将表格的所有记录分组，并且分别显示每组某个列的汇总值以及所有记录的汇总值。先将stu_score1和stu_score2两列的ShowSummary设置为True；UniDBGrid的Grouping用于记录分组，其下FieldName属性用于指定以哪一个字段做分组，Enabled属性用于控制是否分组；UniDBGrid的Summary用于汇总，其下GrandTotal用于设置是否显示所有记录的数据汇总行，GrandTotalAlign用于控制数据汇总行的显示位置，Enabled属性用于控制是否做汇总。为UniDBGrid1的OnColumnSummary事件、OnClumnSummaryResult、OnColumnSummaryTotal添加代码：

一、delphi源代码

1. 列值累加

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;//小汇总累加

      if Column.AuxValues[1]=NULL then

        begin

          Column.AuxValues[1]:=0;

end;

      Column.AuxValues[1]:=Column.AuxValues[1] + Column.Field.AsFloat;//大汇总累加

    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;

      if Column.AuxValues[1]=NULL then

        begin

          Column.AuxValues[1]:=0.0;

end;

      Column.AuxValues[1]:=Column.AuxValues[1] + Column.Field.AsFloat;

    end;

end;

1. 分组汇总

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;

1. 整体汇总

procedure TMainForm.UniDBGrid1ColumnSummaryTotal(Column: TUniDBGridColumn;

  Attribs: TUniCellAttribs; var Result: string);

var

  I : Real;

begin

  if SameText(Column.FieldName, 'stu_score1') then

  begin

    I:=Column.AuxValues[1];

    Result:=Format('语文总分 : %f', [I]);//显示大汇总

    Attribs.Font.Style:=[fsBold];

    Attribs.Font.Color:=clGreen;

  end

  else if SameText(Column.FieldName, 'stu_score2') then

  begin

    I:=Column.AuxValues[1];

    Result:=Format('数学总分 : %f', [I]);

    Attribs.Font.Style:=[fsBold];

    Attribs.Font.Color:=clNavy;

  end;

end;

二、cbuilder源代码

1. 列值累加

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;//分组小汇总

         if(Column->AuxValues[1].IsNull())

                   {

                   Column->AuxValues[1]=0.0;

                   }

         Column->AuxValues[1]=Column->AuxValues[1]+Column->Field->AsFloat;//整体大汇总

         }

else if(Column->FieldName=="stu_score2")

         {

         if(Column->AuxValue.IsNull())

                   {

                   Column->AuxValue=0.0;

                   }

         Column->AuxValue=Column->AuxValue+Column->Field->AsFloat;

         if(Column->AuxValues[1].IsNull())

                   {

                   Column->AuxValues[1]=0.0;

                   }

         Column->AuxValues[1]=Column->AuxValues[1]+Column->Field->AsFloat;

         }

}

1. 分组汇总

void __fastcall TMainForm::UniDBGrid1ColumnSummaryResult(TUniDBGridColumn *Column,

                     Variant &GroupFieldValue, TUniCellAttribs *Attribs, UnicodeString &Result)

{

String score1,score2;

TFontStyles fontStyle(1);//fsBold

if(Column->FieldName=="stu_score1")

         {

         score1=Column->AuxValue;

         Result="语文总分："+score1;

         Attribs->Font->Style=fontStyle;

         Attribs->Font->Color=clGreen;

         }

else if(Column->FieldName=="stu_score2")

         {

         score2=Column->AuxValue;

         Result="数学总分："+score2;

         Attribs->Font->Style=fontStyle;

         Attribs->Font->Color=clGreen;

         }

Column->AuxValue=NULL;

}

1. 整体汇总

void __fastcall TMainForm::UniDBGrid1ColumnSummaryTotal(TUniDBGridColumn *Column,

                     TUniCellAttribs *Attribs, UnicodeString &Result)

{

String score1,score2;

TFontStyles fontStyle(1);//fsBold

if(Column->FieldName=="stu_score1")

         {

         score1=Column->AuxValues[1];

         Result="语文总分："+score1;

         Attribs->Font->Style=fontStyle;

         Attribs->Font->Color=clGreen;

         }

else if(Column->FieldName=="stu_score2")

         {

         score2=Column->AuxValues[1];

         Result="数学总分："+score2;

         Attribs->Font->Style=fontStyle;

         Attribs->Font->Color=clGreen;

         }

}