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DELPHI +dbcheckbox
km123
2004-12-24 09:21:01
如何设置dbcheckbox的初始值为FALSE;即不选中;
不点击dbcheckbox,直接点击保存,则dbcheckbox的值无法存入数据库,即数据库内为NULL,如何能够存入,请各位帮帮忙.
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DELPHI +dbcheckbox
如何设置dbcheckbox的初始值为FALSE;即不选中; 不点击dbcheckbox,直接点击保存,则dbcheckbox的值无法存入数据库,即数据库内为NULL,如何能够存入,请各位帮帮忙.
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km123
2004-12-24
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我就是这样设置的,不起作用,我点击新增,dbcheckbox是灰色的,并且是选中的,我想要的是不选中状态,
ALLOWGRAYED是FALSE;
我在新增下加上了dbcheckbox.CHECKED:=FALSE后,点击新增,又点击保存,可数据库内为NULL
myheartzhang
2004-12-24
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第一步要把dbcheckbox的datafield 给填上,(也就是库里相关的字段)和datasource ;
第二步你可以设置一下,ValueChecked 选中时的值, 和 UnValueChecked 没有选中时的值,
就可以了,比喻说,如果设为,1 和0 的话,哪么选中,保存后库里的值就是1
如果没有选中保存后就是0 ,为会为NULL,并且和它相连的字段为,BIT 类型;
你照上面做做试试,
myheartzhang
2004-12-24
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if not DBccheckquest.Checked then
ADODataSet1.FieldByName('检定是否需要申请').AsInteger:=0;
dbcheckbox的 和 ‘检定是否需要申请'相连 这个字段为tinyint 类型。也就可以了
myheartzhang
2004-12-24
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是这样的,如果你库里的字段是为NULL时候,哪么dbcheckbox 认为是非零,就是被选中了,
你到库里看看,把它全部改为0后,你再看看,是不是为灰色,是否被选中,你最好把这个字段的默认
值为0,这样的话,就不让他有NULL 出现。
DB
Grid内使用
CheckBox
功能
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内
DB
Grid使用
CheckBox
功能一般有两种方法,最简单的就是使用第三方控件,如T
DB
GridEh,使用非常方便,唯一的缺点就是编译出的文件大,大概要大500KB那个样子。另外一种相对简单的方法就是使用
DB
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与
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VCLSkin 5.30 website : http://www.link-rank.com email : info@link-rank.com VCLSkin is a component to create skinnable user interface for
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5 or c++builder5. News in 2.74 *
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VclSkin v2.60 For D567 含105个皮肤 (破解修正版)
uses winskindlg; Type TMySkinManage=class(TSkinManage); procedure TForm1.btn1Click(Sender: TObject); //破解后的2.6版不能够动态改变窗体的caption,下面是补充解决办法 var P: Pchar; begin P := Pointer(TMySkinManage(SkinManager).FindSkinForm(Handle)); if P = nil then exit; P := P+104; //D5的话请将104改为88,未经测试 Pstring(P)^ := 'Edit1.Text'; Caption := 'Edit1.Text'; ////////////////////////////////////////////// end;
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forms,MDIform and common Windows dialogs (MsgBox,Open/Save,Font,Print), even the Exception MsgBox. *Enable/Disable skin at runtime. *fixed many bugs in MDIform. *system menu enchanced. website : http://www.link-rank.com email : info@link-rank.com
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