procedure TCodeForm.FormShow(Sender: TObject);
var
codeSys: TCodeSys;
begin
codeSys := TCodeSys.Create;
if TreeView1.Selected.Text = '海区' then ///到这里总是错误。。
begin
CodeData := codeSys.GetCode;
DataSourceArea.DataSet := CodeData;
end
else
begin
DataSourceArea.DataSet := nil;
end;
codeSys.Free;
end;
var
codeSys: TCodeSys;
begin
codeSys := TCodeSys.Create;
if TreeView1.Selected.Text = '海区' then ///到这里总是错误。。
begin
CodeData := codeSys.GetCode;
DataSourceArea.DataSet := CodeData;
end
else
begin
DataSourceArea.DataSet := nil;
end;
codeSys.Free;
end;
if Assigned(TreeView1.Selected)and(TreeView1.Selected.Text = '海区') then ///到这里总是错误。。......
if TreeView1.Selected.Text = '海区' then ///到这里总是错误。。
begin
CodeData := codeSys.GetCode;
DataSourceArea.DataSet := CodeData;
end
else
::: Project Mexs.exe(我得程序) raised exception class EAccessViolation with
message'Access vidation at address 0050428D in module'Mexs.exe'.Read of
address 00000008.Process stopped.'Use step or run to continue。
我得treeview有两个父节点,父节点下各有4个子节点,每个子节点对应一个表
不知道该怎么连接对应的表
:(
var
i:integer;
node:TTreeNode;
list:TStringList;
s:AnsiString;
begin
ADOquery1.Close;
ADOquery1.sql.Clear;
ADOquery1.sql.Add('select distinct 父结点数据 from 表');
query1.open;
list:=tstringlist.Create;
while not ADOquery1.Eof do
begin
list.Append(query1.fieldbyname('父结点数据').asstring);
ADOquery1.next;
end;
for i:=0 to list.count-1 do
begin
s:=list.strings[i];
node:=treeview1.Items.Add(treeview1.selected,s);
treeview1.Items.addchild(node,'temp');
end;
treeview1.Items[1].Selected :=true;
end;