procedure TForm4.Button1Click(Sender: TObject);
var
Locus,ParamToStr:string;
begin
Locus:=ComboBox1.Text;
with Form1 do
begin
Query1.Close;
Query1.SQL.Clear;
end;
Form1.Query1.SQL.add('select Photograph from photo_t where Place='+'''Locus''');
Form1.Query1.Active:=True;
Form1.Query1.First;
ParamToStr:=Form1.Query1.ParamByName('Photograph').AsString;
Form4.Image1.Picture.LoadFromFile(ParamToStr);
end;检索的时候提示Query1: Parameter 'Photograph' not found
这是怎么回事?ps:
数据库album_db
表photo_t
属性之一Photograph
var
Locus,ParamToStr:string;
begin
Locus:=ComboBox1.Text;
with Form1 do
begin
Query1.Close;
Query1.SQL.Clear;
end;
Form1.Query1.SQL.add('select Photograph from photo_t where Place='+'''Locus''');
Form1.Query1.Active:=True;
Form1.Query1.First;
ParamToStr:=Form1.Query1.ParamByName('Photograph').AsString;
Form4.Image1.Picture.LoadFromFile(ParamToStr);
end;检索的时候提示Query1: Parameter 'Photograph' not found
这是怎么回事?ps:
数据库album_db
表photo_t
属性之一Photograph
出错是:Unknown picture file extension (.)
出错行是最后一行:Form4.Image1.Picture.LoadFromFile(ParamToStr);怎么办?
PS:photograph属性的实值是图片文件的存储路径