C# 如何根据数据库的值 来改变单元格的颜色

C# 如何根据数据库的值 来改变单元格的颜色,第1张

在datagridview的CellFormatting事件中设置

1判断是否为表中的列

if

(dGV_ContractColumns[eColumnIndex]Name

==

"Quality")

2获取单元格的value

object

_obj

=

dGV_ContractRows[eRowIndex]Cells["Quality"]Value;

3判断值是否为1

_obj要转化成你数据库里相同类型,下面是假设数据库值为varchar型

if(_objtostring()=="1")

4设置颜色

eCellStyleBackColor

=

SystemDrawingColorRed;

这是修改单元格的颜色

dGV_ContractRows[eRowIndex]DefaultCellStyleBackColor

=

SystemDrawingColorRed;

这里修改行的

颜色

在编程中,经常会用到取数据库中某一段的记录,如果要取前几条记录都是很简单,在asp中,直接用top就可以了,在php中,用limit就可以,但如果要取数据库中的第N条到第N条怎么办呢,也就是要取数据库中间的数据,在php,取中间的数据,可以用limit很自然的就实现了,主要是asp编程中,需要在sql语句中再重新嵌入一个sql语句,下面看看asp和php中不同的sql读取中间几条记录。

1Aess采用top

从表中取出第M条到第N条的记录(如N=M10)

selecttopN-M1from[tableName]where(idnotin(selecttopM-1idfrom[tableName]))

selecttopN-M1from[tableName]asawherenotexists(selectfrom(selecttopM-1from[tableName]orderbyid)bwherebid=aid)orderbyid

注意:上述语句不能取从第1条到第N条的数据(即M=1时失效),因为selecttopN中N必须从1开始(参考:数据库读取前几条记录的SQL语句大全):此问题的解决办法:要取第1到N条的记录,需要使用selecttopN解决。

取数据库第20到第30条中间的十条记录的sql语句

selecttop10from[tableName]whereidnotin(selecttop20idfrom[tableName]orderbyid)

删除前10行

deletefrom[tableName]whereidin(selecttop10idfrom[tableName])

删除10-20条

deletefrom[tableName]whereidin(selecttop20idfrom[tableName])andidnotin(selecttop10idfrom[tableName])

2MySql采用limit

limit子句可以被用于强制select语句返回指定的记录数。limit接受一个或两个数字参数。参数必须是一个整数常量。如果给定两个参数,第一个参数指定第一个返回记录行的偏移量,第二个参数指定返回记录行的最大数目。初始记录行的偏移量是0(而不是1)

检索记录行11-15

selectfrom[tableName]limit10,15

带缩略图的轮换广告代码,将下面代码加入网页中即可(和文字说明你可以从数据库中调出!)

下面代码系转载,来自:

<style>

BODY {

PADDING-RIGHT: 0px; PADDING-LEFT: 0px; FONT-SIZE: 12px; BACKGROUND: #000; PADDING-BOTTOM: 0px; MARGIN-LEFT: auto; COLOR: #f6f6ee; MARGIN-RIGHT: auto; PADDING-TOP: 0px; FONT-FAMILY: 宋体; HEIGHT: 490px; TEXT-ALIGN: center

}

A {

COLOR: #fff; TEXT-DECORATION: none

}

A:hover {

COLOR: #fff; TEXT-DECORATION: underline

}

fpic {

BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; Z-INDEX: 3; BACKGROUND: #000; BORDER-BOTTOM-WIDTH: 0px; WIDTH: 476px; POSITION: relative; HEIGHT: 330px; BORDER-RIGHT-WIDTH: 0px;BORDER: #dddddd 1px solid;

text-align:center

}

bpic {

FLOAT: left; MARGIN: 0px; WIDTH: 244px; POSITION: relative; HEIGHT: 243px

}

#focpic {

BORDER-TOP-WIDTH: 0px; BORDER-LEFT-WIDTH: 0px; LEFT: 1px; BORDER-BOTTOM-WIDTH: 0px; POSITION: absolute; TOP: 1px; BORDER-RIGHT-WIDTH: 0px

}

thubpic {

PADDING-RIGHT: 0px; PADDING-LEFT: 4px; Z-INDEX: 20; PADDING-BOTTOM: 0px; WIDTH: 63px; CURSOR: pointer; PADDING-TOP: 4px; TOP: 10px; HEIGHT: 49px

}

thubpiccur {

PADDING-RIGHT: 0px; PADDING-LEFT: 4px; Z-INDEX: 20; PADDING-BOTTOM: 0px; WIDTH: 63px; CURSOR: pointer; PADDING-TOP: 4px; TOP: 10px; HEIGHT: 49px

}

thubpiccur {

Z-INDEX: 30; BACKGROUND: url(icon/images20071220/arrow3gif) no-repeat left 50%

}

thubpic IMG {

BORDER-RIGHT: #666 3px solid; BORDER-TOP: #666 2px solid; BORDER-LEFT: #666 3px solid; WIDTH: 56px; BORDER-BOTTOM: #666 2px solid; HEIGHT: 42px

}

thubpiccur IMG {

BORDER-RIGHT: #666 3px solid; BORDER-TOP: #666 2px solid; BORDER-LEFT: #666 3px solid; WIDTH: 56px; BORDER-BOTTOM: #666 2px solid; HEIGHT: 42px

}

thubpiccur IMG {

BORDER-LEFT-COLOR: #fff; BORDER-BOTTOM-COLOR: #fff; BORDER-TOP-COLOR: #fff; BORDER-RIGHT-COLOR: #fff

}

-->

</style>

<SCRIPT language=javascript>

//all by

var currslid = 0;

var slidint;

function setfoc(id){

documentgetElementById("focpic")src = picarry[id];

documentgetElementById("foclnk")href = lnkarry[id];

documentgetElementById("fttltxt")innerHTML = '<a href="'+lnkarry[id]+'" target="_blank">'+ttlarry[id]+'</a>';

currslid = id;

for(i=0;i<6;i++){

documentgetElementById("tmb"+i)className = "thubpic";

};

documentgetElementById("tmb"+id)className ="thubpiccur";

focpicstylevisibility = "hidden";

focpicfilters[0]Apply();

if (focpicstylevisibility == "visible") {

focpicstylevisibility = "hidden";

focpicfiltersrevealTranstransition=23;

}

else {

focpicstylevisibility = "visible";

focpicfilters[0]transition=23;

}

focpicfilters[0]Play();

stopit();

}

function playnext(){

if(currslid==5){

currslid = 0;

}

else{

currslid++;

};

setfoc(currslid);

playit();

}

function playit(){

slidint = setTimeout(playnext,4500);

}

function stopit(){

clearTimeout(slidint);

}

windowonload = function(){

playit();

}

</SCRIPT>

</head>

<body>

<DIV class=fpic>

<A id=foclnk href="" target=_blank><IMG id=focpic style="FILTER: RevealTrans ( duration = 1,transition=23 ); VISIBILITY: visible; POSITION: absolute" height=300 alt="" src="icon/images20071220/01jpg" width=400></A>

<DIV id=fttltxt

style="MARGIN-TOP: 305px; FLOAT: left; WIDTH: 400px; TEXT-ALIGN: center"><A

href="" target=_blank>梦:牧场小屋</A></DIV>

<DIV style="MARGIN-LEFT: 402px; WIDTH: 65px">

<DIV class=thubpiccur id=tmb0 onmouseover=setfoc(0); onmouseout=playit();><A

href="" target=_blank><IMG

src="icon/images20071220/01jpg" alt="" width=56 height=42 border="0"></A></DIV>

<DIV class=thubpic id=tmb1 onmouseover=setfoc(1); onmouseout=playit();><A

href="" target=_blank><IMG height=45 alt=""

src="icon/images20071220/02jpg" width=56></A></DIV>

<DIV class=thubpic id=tmb2 onmouseover=setfoc(2); onmouseout=playit();><A

href="" target=_blank><IMG height=45 alt=""

src="icon/images20071220/03jpg" width=56></A></DIV>

<DIV class=thubpic id=tmb3 onmouseover=setfoc(3); onmouseout=playit();><A

href="" target=_blank><IMG height=45 alt=""

src="icon/images20071220/04jpg" width=56></A></DIV>

<DIV class=thubpic id=tmb4 onmouseover=setfoc(4); onmouseout=playit();><A

href="" target=_blank><IMG height=45 alt=""

src="icon/images20071220/05jpg" width=56></A></DIV>

<DIV class=thubpic id=tmb5 onmouseover=setfoc(5); onmouseout=playit();><A

href="" target=_blank><IMG height=45 alt=""

src="icon/images20071220/06jpg" width=56></A></DIV>

<SCRIPT language=javascript type=text/javascript>

var picarry = {};

var lnkarry = {};

var ttlarry = {};

picarry[0] = "icon/images20071220/01jpg";

lnkarry[0] = "";

ttlarry[0] = "梦:牧场小屋";

picarry[1] = "icon/images20071220/02jpg";

lnkarry[1] = "";

ttlarry[1] = "碎玉:回眸";

picarry[2] = "icon/images20071220/03jpg";

lnkarry[2] = "";

ttlarry[2] = "飞狐:豆花档";

picarry[3] = "icon/images20071220/04jpg";

lnkarry[3] = "";

ttlarry[3] = "牛说不哭:烈日下的建筑工人";

picarry[4] = "icon/images20071220/05jpg";

lnkarry[4] = "";

ttlarry[4] = "新疆瓦格:哈萨克族搭建毡房";

picarry[5] = "icon/images20071220/06jpg";

lnkarry[5] = "";

ttlarry[5] = "松间明月:汽车文化";

</SCRIPT>

</DIV></DIV>

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