我是利用delphi调用Oracle数据库中的blob字段来显示在image控件中的。以前写过,调的好好的。现在把哪个拿过来重新写程序,反而不行。
很简单的,利用一个按钮,调用图片,并显示在image中。image控件中属性没有改动一个,改动了好像也没有用。unit Unit1;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, DB, DBTables, ExtCtrls, StdCtrls, jpeg;type
TForm1 = class(TForm)
Database1: TDatabase;
Button1: TButton;
Query1: TQuery;
Image1: TImage;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);
var
ssql:string;
mStream:TMemoryStream;
bl:TBlobField ;
JpgFile:TjpegImage;
str_dzjc,str_jkbh:string;
i:integer;
begin
mStream:=TMemoryStream.Create ;
JpgFile:=TjpegImage.Create ;
Query1.sql.Clear;
ssql:='select dzjcid,tpxl,tp from syn_bk_picture where dzjcid=''1001'' and tpxl=0';
Query1.sql.add(ssql);
try
Query1.Open;
except
exit;
end;
bl:=TBlobField(Query1.FieldByName('tp'));//顯示的轉換為BlobFiled並保存至內存流
bl.SaveToStream(mStream);
mStream.Position :=0;
jpgfile.LoadFromStream(MStream);
Image1.Picture.Assign(JpgFile);
end;
很简单的,利用一个按钮,调用图片,并显示在image中。image控件中属性没有改动一个,改动了好像也没有用。unit Unit1;interfaceuses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, DB, DBTables, ExtCtrls, StdCtrls, jpeg;type
TForm1 = class(TForm)
Database1: TDatabase;
Button1: TButton;
Query1: TQuery;
Image1: TImage;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;var
Form1: TForm1;implementation{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);
var
ssql:string;
mStream:TMemoryStream;
bl:TBlobField ;
JpgFile:TjpegImage;
str_dzjc,str_jkbh:string;
i:integer;
begin
mStream:=TMemoryStream.Create ;
JpgFile:=TjpegImage.Create ;
Query1.sql.Clear;
ssql:='select dzjcid,tpxl,tp from syn_bk_picture where dzjcid=''1001'' and tpxl=0';
Query1.sql.add(ssql);
try
Query1.Open;
except
exit;
end;
bl:=TBlobField(Query1.FieldByName('tp'));//顯示的轉換為BlobFiled並保存至內存流
bl.SaveToStream(mStream);
mStream.Position :=0;
jpgfile.LoadFromStream(MStream);
Image1.Picture.Assign(JpgFile);
end;
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