Title: Creating Components Depending on Inifile Paramiters
Question: If you want to create components at run time depending on paramiters which are read from inifile Do this
Answer:
I am reading inifile on formshow and starting to create database componensts depending on the paramiters which are in ini file. This paramiters are Left and Top and DataSource paramiters of the components.
Chech this kode
procedure TDataForm.FormShow(Sender: TObject);
var AlimentIniFile:TIniFile;
CreateCount,
LabelNoInIni,
EditNoInIni,
MemoNoInIni:Integer;
{$H-}
LaCaption,
LaTop,
LaLeft,
EdDataField,
EdTop,
EdLeft,
MeDataField,
MeTop,
MeLeft:String;
{$H+}
begin
DBNavigator1.DataSource:=DMod.GaraTableViewDS;
if FileExists(AligmentFilName) then
begin
try
AlimentIniFile:=TIniFile.Create(AligmentFilName);
try
LabelNoInIni:=AlimentIniFile.ReadInteger('ConCount','LabelNo',-1);
EditNoInIni:=AlimentIniFile.ReadInteger('ConCount','EditNo',-1);
MemoNoInIni:=AlimentIniFile.ReadInteger('ConCount','MemoNo',-1);
//-------------------------Read Attiribute From Ini File--------------
//---------------Read Attrib Label-----------------------
if LabelNoinIni-1 then
begin
lacount:=-1;
for CreateCount:=0 to LabelNoInIni do
begin
lacount:=lacount+1;
laCaption:=AlimentIniFile.ReadString('Label'
+IntToStr(CreateCount),'Caption','');
laLeft:=AlimentIniFile.ReadString('Label'
+IntToStr(CreateCount),'Left','');
LaTop:=AlimentIniFile.ReadString('Label'
+IntToStr(CreateCount),'Top','');
la[CreateCount]:=TLabel.Create(self);
la[CreateCount].Tag:=CreateCount;
la[CreateCount].AutoSize:=true;
la[CreateCount].Parent:=dataform;
la[CreateCount].Caption:=LaCaption;
la[CreateCount].Top:=StrToInt(LaTop);
la[CreateCount].Left:=StrToInt(LaLeft);
la[CreateCount].DragMode:=dmAutomatic;
la[CreateCount].OnClick:=Label1Click;
end;
end;
//-----------------------Read Atrib Edit--------------------
if EditNoinIni-1 then
begin
edcount:=-1;
for CreateCount:=0 to EditNoInIni do
begin
edcount:=edcount+1;
EdTop:=AlimentIniFile.ReadString('Edit'
+IntToStr(CreateCount),'Top','');
EdLeft:=AlimentIniFile.ReadString('Edit'
+IntToStr(CreateCount),'Left','');
EdDataField:=AlimentIniFile.ReadString('Edit'
+IntToStr(CreateCount),'DataField','');
ed[CreateCount]:=TDBEdit.Create(self);
ed[CreateCount].Tag:=CreateCount;
ed[CreateCount].Top:=StrToInt(EdTop);
ed[CreateCount].Left:=StrToInt(EdLeft);
ed[CreateCount].Parent:=DataForm;
ed[CreateCount].OnMouseDown:=Edit1MouseDown;
ed[CreateCount].DataSource:=DMod.GaraTableViewDS;
ed[CreateCount].DataField:=EdDataField;
ed[CreateCount].OnClick:=Label1Click;
end;
end;
//-----------------Read Memo Attrib--------------------
if MemoNoinIni-1 then
begin
mecount:=-1;
for CreateCount:=0 to MemoNoInIni do
begin
mecount:=mecount+1;
MeTop:=AlimentIniFile.ReadString('memo'
+IntToStr(CreateCount),'Top','');
MeLeft:=AlimentIniFile.ReadString('memo'
+IntToStr(CreateCount),'Left','');
MeDataField:=AlimentIniFile.ReadString('memo'
+IntToStr(CreateCount),'DataField','');
me[CreateCount]:=TDBMemo.Create(self);
me[CreateCount].Tag:=CreateCount;
me[CreateCount].Top:=StrToInt(MeTop);
me[CreateCount].Left:=StrToInt(MeLeft);
me[CreateCount].Parent:=DataForm;
me[CreateCount].OnMouseDown:=Edit1MouseDown;
me[CreateCount].DataSource:=DMod.GaraTableViewDS;
me[CreateCount].DataField:=MeDataField;
me[CreateCount].OnClick:=Label1Click;
end;
end;
except on Exception do
ShowMessage('Component Create Error!');
end;
finally
try
DMod.GaraTableView.Active:=false;
DMod.GaraTableView.ReadOnly:=false;
DMod.GaraTableView.TableName:=Form1.TableBox.Items[Form1.TableBox.itemindex];
DMod.GaraTableView.Active:=true;
except on Exception do
ShowMessage('Field Def Error');
end;
AlimentIniFile.Free;//Free Allocated Memory
end;
end;
end;
I hope this will help you