1. 打开新的窗口并传送参数:
x$bCbg M>jk"*hA| 传送参数:
%b ^.Gw\L response.write("<script>window.open(’*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"’)</script>")
"j}fcrlG9 [;7$ 'lr%D 接收参数:
:&O6Y-/B string a = Request.QueryString("id");
@Y&(1Wl string b = Request.QueryString("id1");
wF['oUwHH 'd< 1;Ayw 2.为按钮添加对话框
O-<nLB!Wf Button1.Attributes.Add("onclick","return confirm(’确认?’)");
lhFv2.qR button.attributes.add("onclick","if(confirm(’are you sure...?’)){return true;}else{return false;}")
w"E.Va ?)/&tk9.n 3.删除表格选定记录
\ 3l3,VYH int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];
<\\,L@ string deleteCmd = "DELETE from Employee where emp_id = " + intEmpID.ToString()
.W0;Vhw" *U|2u+| F 4.删除表格记录警告
<%LN3T private void DataGrid_ItemCreated(Object sender,DataGridItemEventArgs e)
I h 19&D {
t^<ki?* switch(e.Item.ItemType)
hr GfA {
>xm:?W R
case ListItemType.Item :
Eg]tDPN1 case ListItemType.AlternatingItem :
#)<WQZ) case ListItemType.EditItem:
:c&F\Q= TableCell myTableCell;
pQBhheiM myTableCell = e.Item.Cells[14];
9%bqY9NFd LinkButton myDeleteButton ;
W}> wRy myDeleteButton = (LinkButton)myTableCell.Controls[0];
{ Em fw9L myDeleteButton.Attributes.Add("onclick","return confirm(’您是否确定要删除这条信息’);");
4jz2x #T break;
X>s'_F? default:
!
d " i break;
:*E#w"$,j }
koOp:7r kQ
$.g< }
7E)*]7B% {
daEKac5 5.点击表格行链接另一页
<0^L L private void grdCustomer_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
':?MFkYC {
=:7OS>x //点击表格打开
:g"UG0]; if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
An3%@; e.Item.Attributes.Add("onclick","window.open(’Default.aspx?id=" + e.Item.Cells[0].Text + "’);");
9]*hP]( }
Bpl(s+ (n~GKcA 双击表格连接到另一页
t3FfPV!P" bl`vT3 在itemDataBind事件中
>{w"aJ" F if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
# F|w_P {
8j&LU, string OrderItemID =e.item.cells[1].Text;
'wP\VCL2> ...
a*KJjl?k e.item.Attributes.Add("ondblclick", "location.href=’../ShippedGrid.aspx?id=" + OrderItemID + "’");
pksF|VS }
)\Ay4d c=\H&x3X 双击表格打开新一页
; Uf]-uS if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
]tDuCZA {
hG%J:} string OrderItemID =e.item.cells[1].Text;
}SF<. A ...
%:7fAB,PA e.item.Attributes.Add("ondblclick", "open(’../ShippedGrid.aspx?id=" + OrderItemID + "’)");
!&8HA }
}6^d/nE*T
[%yCnt ★特别注意:【?id=】 处不能为 【?id =】
58.b@@T 6.表格超连接列传递参数
,aQ{ <asp:HyperLinkColumn Target="_blank" headertext="ID号" DataTextField="id" NavigateUrl="aaa.aspx?id=’
~OQ/ |ws <%# DataBinder.Eval(Container.DataItem, "数据字段1")%>’ & name=’<%# DataBinder.Eval(Container.DataItem, "数据字段2")%>’ />
vB T]a w%Tjn^ d 7.表格点击改变颜色
>z1q\cz if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)
6.
6g9 {
p:8&&v~I e.Item.Attributes.Add("onclick","this.style.backgroundColor=’#99cc00’;
sas:5iB5 this.style.color=’buttontext’;this.style.cursor=’default’;");
x9B{|+tIoc }
Ct,|g =( W_P&;)E 写在DataGrid的_ItemDataBound里
Hwm]l`E] if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)
mtg3}etA {
>YW_}kd e.Item.Attributes.Add("onmouseover","this.style.backgroundColor=’#99cc00’;
%N
}0,a0 this.style.color=’buttontext’;this.style.cursor=’default’;");
F8%.-.l) e.Item.Attributes.Add("onmouseout","this.style.backgroundColor=’’;this.style.color=’’;");
2W 9N-t21 }
z&r@c-l@ uzpW0(_i3a QCvz| ) 8.关于日期格式
)cd5iE:FO JVgV,4 1 日期格式设定
BYBf`F)4 DataFormatString="{0:yyyy-MM-dd}"
Q-M"+ HO /^T XGc. 我觉得应该在itembound事件中
gnPu{-Ec* e.items.cell["你的列"].text=DateTime.Parse(e.items.cell["你的列"].text.ToString("yyyy-MM-dd"))
{"x8q +vh 4I 9.获取错误信息并到指定页面
o> i`Jq& W~e/3#R\= 不要使用Response.Redirect,而应该使用Server.Transfer
G
uLU7a i{
" g7 e.g
:n} NQzs // in global.asax
2!+saf^-, protected void Application_Error(Object sender, EventArgs e) {
sF`ELrR \ if (Server.GetLastError() is HttpUnhandledException)
&n)=OConge Server.Transfer("MyErrorPage.aspx");
^YLk&A)X g~i%*u,Y< //其余的非HttpUnhandledException异常交给ASP.NET自己处理就okay了 :)
.+ w#n< }
|6d0,muN CtO `t5 Redirect会导致post-back的产生从而丢失了错误信息,所以页面导向应该直接在服务器端执行,这样就可以在错误处理页面得到出错信息并进行相应的处理
:t36]NM Fuuy_+p@G 10.清空Cookie
RZ#~^5DiO Cookie.Expires=[DateTime];
3+j!{tJ
z2 Response.Cookies("UserName").Expires = 0
a$r<%a6 Z+*t=?L,,G 11.自定义异常处理
_Bp{~-fO //自定义异常处理类
Qg\{d)X[N using System;
muc>4!Q using System.Diagnostics;
Pq@%MF]5 Av#_cL namespace MyAppException
*/ ~_ 3 {
vCB0x:/ /// <summary>
Y%B:IeF} /// 从系统异常类ApplicationException继承的应用程序异常处理类。
W".: 1ov#B /// 自动将异常内容记录到Windows NT/2000的应用程序日志
0A}'@N@G) /// </summary>
~F
,mc. public class AppException:System.ApplicationException
-J$,W`#z {
~x:B@Ow public AppException()
CE'd`_;HLn {
>8*J ;(:W if (ApplicationConfiguration.EventLogEnabled)LogEvent("出现一个未知错误。");
A+:X }
!X5~!b^* X{j`H\'L public AppException(string message)
t%`GXJb {
t[ Zoe+& LogEvent(message);
{|;5P.,l }
,W!v0*uxp& >*hY1@N1 public AppException(string message,Exception innerException)
X<OOgC {
U{+<c [ LogEvent(message);
/i${ [1 if (innerException != null)
p%8v+9+h2 {
h*2NFL~# LogEvent(innerException.Message);
-f+U:/'.>v }
,'KQF C }
<u'q._m _h=kjc}[.O //日志记录类
M+mO4q6 using System;
d'4^c,d using System.Configuration;
:slVja$e
using System.Diagnostics;
-/k;VT| using System.IO;
]~!jf using System.Text;
yO7xAb using System.Threading;
)_vE"ryThA 7 fE
QD?C namespace MyEventLog
a2{nrGD {
?-y!FD}m& /// <summary>
Ax9a5;5WM /// 事件日志记录类,提供事件日志记录支持
OqaVp/, /// <remarks>
b*7:{FXg /// 定义了4个日志记录方法 (error, warning, info, trace)
k|Hxd^^I /// </remarks>
w _*|u /// </summary>
-t<8)9q( public class ApplicationLog
Zr&~gXmVS {
jP]I>Tq /// <summary>
3kl<~O|Fs /// 将错误信息记录到Win2000/NT事件日志中
f^tCD'Vmi /// <param name="message">需要记录的文本信息</param>
IwE{Zvr /// </summary>
<0Mc\wy public static void WriteError(String message)
0nh;0Z {
UJqDZIvC WriteLog(TraceLevel.Error, message);
vbDSNm#Yv }
+, SUJ| 9vAY|b^ /// <summary>
@435K'! /// 将警告信息记录到Win2000/NT事件日志中
4!Cu>8B /// <param name="message">需要记录的文本信息</param>
L=7U#Q/DE /// </summary>
VI}.MnCa public static void WriteWarning(String message)
Ux<2!vh {
tAPr4n! WriteLog(TraceLevel.Warning, message);
(&=<UGY(w }
_;;'/rs
j ?f\;z<e| /// <summary>
t3~ZGOn /// 将提示信息记录到Win2000/NT事件日志中
bD&^-&
G /// <param name="message">需要记录的文本信息</param>
Qj?qWVapA /// </summary>
-FAAP&LG public static void WriteInfo(String message)
Au q) {
rj.]M6# WriteLog(TraceLevel.Info, message);
|
JmEI9n2 }
aaN|g{pX /// <summary>
w4: /// 将跟踪信息记录到Win2000/NT事件日志中
HG1)q\Xd /// <param name="message">需要记录的文本信息</param>
syEWc(5 /// </summary>
R3HfE*;Z public static void WriteTrace(String message)
qhKW6v {
B{#*PAK= WriteLog(TraceLevel.Verbose, message);
,9(=Iu-?1 }
EXdx$I=X rRTAWAs%T /// <summary>
8y<NT" /// 格式化记录到事件日志的文本信息格式
0 > /// <param name="ex">需要格式化的异常对象</param>
\m>mE/N /// <param name="catchInfo">异常信息标题字符串.</param>
QbF!V%+a's /// <retvalue>
SMMV$;O{9 /// <para>格式后的异常信息字符串,包括异常内容和跟踪堆栈.</para>
&0E>&1`7 /// </retvalue>
zyznFiE /// </summary>
zL1*w@6 public static String FormatException(Exception ex, String catchInfo)
y+ZRh?2 {
<Ae1YHUY StringBuilder strBuilder = new StringBuilder();
:'L^zGf if (catchInfo != String.Empty)
MH"{N
"| {
Mw0Kg9M strBuilder.Append(catchInfo).Append("\r\n");
z,6X{= }
x=UwyZ strBuilder.Append(ex.Message).Append("\r\n").Append(ex.StackTrace);
:MOr?" return strBuilder.ToString();
?0v(_ v }
` )9nBZ 4K_ fN /// <summary>
tWs ]Zd /// 实际事件日志写入方法
tD G[}j /// <param name="level">要记录信息的级别(error,warning,info,trace).</param>
6#,VnS)`q /// <param name="messageText">要记录的文本.</param>
4CzT<cp /// </summary>
0Zt=1Tv private static void WriteLog(TraceLevel level, String messageText)
>S3,_@C {
)1PZ# try
X3C"A|HE9 {
XHX\+&6 EventLogEntryType LogEntryType;
.{cka]9WJz switch (level)
u?OyvvpH {
B.wRZDEvc case TraceLevel.Error:
_QD##`< LogEntryType = EventLogEntryType.Error;
`N+A8 break;
bN Ub case TraceLevel.Warning:
mkA1Sh{hX> LogEntryType = EventLogEntryType.Warning;
RXMzwk break;
u7rA8u|TO case TraceLevel.Info:
eXHk6[%[ LogEntryType = EventLogEntryType.Information;
+=XDNSw break;
(J c} K case TraceLevel.Verbose:
ZT
UaF4k j LogEntryType = EventLogEntryType.SuccessAudit;
^)r^k8y' break;
On[:]# default:
~Rs_ep'+Q2 LogEntryType = EventLogEntryType.SuccessAudit;
rf2+~B{$, break;
y7K&@Y }
hAPWEh^ ^8,Y1r9`$ EventLog eventLog = new EventLog("Application", ApplicationConfiguration.EventLogMachineName, ApplicationConfiguration.EventLogSourceName );
X8F@U ^@ //写入事件日志
}y<p_dZI eventLog.WriteEntry(messageText, LogEntryType);
yPgDb[V+ -P;_j,~U }
NWuJ&+gcO5 catch {} //忽略任何异常
J&64tQl* }
iKy_DV;J } //class ApplicationLog
'$5.{o`s*1 }
a?LrSk` byj}36LN62 12.Panel 横向滚动,纵向自动扩展
JGP<'6"L$ <asp:panel style="overflow-x:scroll;overflow-y:auto;"></asp:panel>
NVEjUt/ +-~:E_G 13.回车转换成Tab
WaU+ZgDrG <script language="javascript" for="document" event="onkeydown">
W`baD!* if(event.keyCode==13 && event.srcElement.type!=’button’ && event.srcElement.type!=’submit’ && event.srcElement.type!=’reset’ && event.srcElement.type!=’’&& event.srcElement.type!=’textarea’);
&kR +7 event.keyCode=9;
+*dG'U6 </script>
BPp`r_m8w} W/(D"[:l% onkeydown="if(event.keyCode==13) event.keyCode=9"
3Un{Q~6h d$>TC(E=t 14.DataGrid超级连接列
YCJ6an DataNavigateUrlField="字段名" DataNavigateUrlFormatString="
http://xx/inc/delete.aspx?ID={0}"
^DL}J>F9G ^4Nk13 15.DataGrid行随鼠标变色
G_GPnKdd private void DGzf_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
7M#eR8*[se {
?(9/V7HQ.5 if (e.Item.ItemType!=ListItemType.Header)
t>D|1E" {
_j$"fg e.Item.Attributes.Add( "onmouseout","this.style.backgroundColor=\""+e.Item.Style["BACKGROUND-COLOR"]+"\"");
9H@I<`qGC e.Item.Attributes.Add( "onmouseover","this.style.backgroundColor=\""+ "#EFF3F7"+"\"");
<h(KIY9T }
tx$kD2 }
jo75MSj l+6y$2QR 16.模板列
}T@^wY_Ow <ASP:TEMPLATECOLUMN visible="False" sortexpression="demo" headertext="ID">
J%G
EIe| <ITEMTEMPLATE>
vwVK^B <ASP:LABEL text=’<%# DataBinder.Eval(Container.DataItem, "ArticleID")%>’ runat="server" width="80%" id="lblColumn" />
&PHejG_# </ITEMTEMPLATE>
3F5Y#[L` </ASP:TEMPLATECOLUMN>
RlRkw+%m 8dg\_H_ <ASP:TEMPLATECOLUMN headertext="选中">
!.(Kpcrg <HEADERSTYLE wrap="False" horizontalalign="Center"></HEADERSTYLE>
uSZCJ#'G <ITEMTEMPLATE>
axJuJ`+Y <ASP:CHECKBOX id="chkExport" runat="server" />
=oZHN, </ITEMTEMPLATE>
mWOW39Ku <EDITITEMTEMPLATE>
>]6f!;Rt <ASP:CHECKBOX id="chkExportON" runat="server" enabled="true" />
U} EaV< </EDITITEMTEMPLATE>
^Eu]i </ASP:TEMPLATECOLUMN>
4uQ\JD(*Eu CqMm'6;$a} 后台代码
<Fkm7ME] protected void CheckAll_CheckedChanged(object sender, System.EventArgs e)
x-wIgo+ {
pGQP9r% //改变列的选定,实现全选或全不选。
MAhJ>qe8
p CheckBox chkExport ;
k[TVu5R if( CheckAll.Checked)
mAycfa {
j]-0m4QF foreach(DataGridItem oDataGridItem in MyDataGrid.Items)
3j'A.S {
,EkzBVgo chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
W[pOLc- chkExport.Checked = true;
A1b</2 }
X9W'.s.[Q }
gZa/?[+ else
]Gk;n/!
B {
NSQ}:m foreach(DataGridItem oDataGridItem in MyDataGrid.Items)
\Wdl1 =` {
{M`yYeo chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
9g*O;0 uz chkExport.Checked = false;
=?o, ' n0 }
$]V,H" }
(mO{W }
j_`
[Z s} 2TJa 17.数字格式化
D{-h2=V "4Joou"U 【<%#Container.DataItem("price")%>的结果是500.0000,怎样格式化为500.00?】
;yfKYN[ <%#Container.DataItem("price","{0:¥#,##0.00}")%>
;kSRv=S KpHt(>NR int i=123456;
p~Tp=d)/ string s=i.ToString("###,###.00");
glMYEGz6p w_c)iJ 18.日期格式化
y^PQgzm] d:Y!!LV-@L 【aspx页面内:<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date")%>
UL9]LEGG
@vsgmz 显示为: 2004-8-11 19:44:28
=>?;Iv'Z j@N z 我只想要:2004-8-11 】
CSKOtqKQ) <%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date","{0:yyyy-M-d}")%>
C`G+b{o L]wWJL 应该如何改?
W''%{A/' [/h3HyZ. 【格式化日期】
9v\x&h vY 0EffZ 取出来,一般是object((DateTime)objectFromDB).ToString("yyyy-MM-dd");
0P{^aSxTP 1M1|Wp 【日期的验证表达式】
`IP?w&k) mLEJt,X A.以下正确的输入格式: [2004-2-29], [2004-02-29 10:29:39 pm], [2004/12/31]
/{)}y ^((\d{2}(([02468][048])|([13579][26]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|([1-2][0-9])))))|(\d{2}(([02468][1235679])|([13579][01345789]))[\-\/\s]?((((0?[13578])|(1[02]))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))[\-\/\s]?((0?[1-9])|([1-2][0-9])|(30)))|(0?2[\-\/\s]?((0?[1-9])|(1[0-9])|(2[0-8]))))))(\s(((0?[1-9])|(1[0-2]))\:([0-5][0-9])((\s)|(\:([0-5][0-9])\s))([AM|PM|am|pm]{2,2})))?$
:G.u{cw Vd+qi~kA B.以下正确的输入格式:[0001-12-31], [9999 09 30], [2002/03/03]
/ @v V^!#1 ^\d{4}[\-\/\s]?((((0[13578])|(1[02]))[\-\/\s]?(([0-2][0-9])|(3[01])))|(((0[469])|(11))[\-\/\s]?(([0-2][0-9])|(30)))|(02[\-\/\s]?[0-2][0-9]))$
mu#IF'|b 7+N0$0w%r 【大小写转换】
NO)Hi)$X6Y HttpUtility.HtmlEncode(string);
?;GbK2\bj HttpUtility.HtmlDecode(string)
'E\/H17 -yP|CZM 19.如何设定全局变量
0oNNEC ]_"c_QG Global.asax中
(vR9vOpJ Yvi.l6JL Application_Start()事件中
?-Qq\D^+ c
-sc*.& 添加Application[属性名] = xxx;
&i(\g7%U 1>c^-"#e^ 就是你的全局变量
J-UqH3({Z, 0~a9gBG 20.怎样作到HyperLinkColumn生成的连接后,点击连接,打开新窗口?
Io;x~i09K n 3eLIA{ HyperLinkColumn有个属性Target,将器值设置成"_blank"即可.(Target="_blank")
+g9CklJ ]$7yB3S,B 【ASPNETMENU】点击菜单项弹出新窗口
N*1{yl76x V}Ok>6(~ 在你的menuData.xml文件的菜单项中加入URLTarget="_blank",如:
htuYctu` <?xml version="1.0" encoding="GB2312"?>
Jkx_5kk/\ <MenuData ImagesBaseURL="images/">
g[c_rty <MenuGroup>
Q4Zw<IZv5 <MenuItem Label="内参信息" URL="Infomation.aspx" >
nk*T
x <MenuGroup ID="BBC">
rq#\x{l <MenuItem Label="公告信息" URL="Infomation.aspx" URLTarget="_blank" LeftIcon="file.gif"/>
6"oG
bte <MenuItem Label="编制信息简报" URL="NewInfo.aspx" LeftIcon="file.gif" />
p!o?2Lbiw ......
5y~Srb?2 9Ai3p 最好将你的aspnetmenu升级到1.2版
z%q)}$O Q)/oU\ 21.读取DataGrid控件TextBox值
6/dP)"a(' foreach(DataGrid dgi in yourDataGrid.Items)
Q{o ]^tN {
gWIb"l TextBox tb = (TextBox)dgi.FindControl("yourTextBoxId");
(|2:^T+ tb.Text....
Yq-Vwh/ }
l9Av@| LOEiV 23.在DataGrid中有3个模板列包含Textbox分别为 DG_ShuLiang (数量) DG_DanJian(单价) DG_JinE(金额)分别在5.6.7列,要求在录入数量及单价的时候自动算出金额即:数量*单价=金额还要求录入时限制为 数值型.我如何用客户端脚本实现这个功能?
Wx` $hvdq $xqX[ocor 〖思归〗
X|'[\v2ld <asp:TemplateColumn HeaderText="数量">
h]vuBHJ} <ItemTemplate>
Z [YSET <asp:TextBox id="ShuLiang" runat=’server’ Text=’<%# DataBinder.Eval(Container.DataItem,"DG_ShuLiang")%>’
pf`vH`r onkeyup="javascript:DoCal()"
<{cf'"O7 ) />
7PbwCRg *5KDu$'(e <asp:RegularExpressionValidator id="revS" runat="server" ControlToValidate="ShuLiang" ErrorMessage="must be integer" ValidationExpression="^\d+$" />
z7s}-w, </ItemTemplate>
!!<H*9]+W; </asp:TemplateColumn>
-KL5sK a|-ozBFR <asp:TemplateColumn HeaderText="单价">
Q"s]<MtdS <ItemTemplate>
S=a>rnF <asp:TextBox id="DanJian" runat=’server’ Text=’<%# DataBinder.Eval(Container.DataItem,"DG_DanJian")%>’
6Qn};tbnD onkeyup="javascript:DoCal()"
$}JWJ\-] />
2Ah B)8bG YJF|J2u <asp:RegularExpressionValidator id="revS2" runat="server" ControlToValidate="DanJian" ErrorMessage="must be numeric" ValidationExpression="^\d+(\.\d*)?$" />
@Yw>s9X Sg<
B+u\\ </ItemTemplate>
GGU>={D) </asp:TemplateColumn>
&9EcgazV }2''}-Nc <asp:TemplateColumn HeaderText="金额">
0V+v)\4FE <ItemTemplate>
!8*7 {7 <asp:TextBox id="JinE" runat=’server’ Text=’<%# DataBinder.Eval(Container.DataItem,"DG_JinE")%>’ />
9*S9~ </ItemTemplate>
.1:B\R(( </asp:TemplateColumn><script language="javascript">
*&~(>gNF, function DoCal()
UmL Boy&* {
07G'"= var e = event.srcElement;
hf:\^w var row = e.parentNode.parentNode;
T*%O\&'r var txts = row.all.tags("INPUT");
v+~O\v5Q if (!txts.length || txts.length < 3)
"I
QM4: return;
i|xC#hV !
Q8y]9O var q = txts[txts.length-3].value;
L5wR4Ue) var p = txts[txts.length-2].value;
P@0J! ?&D.b$ if (isNaN(q) || isNaN(p))
WJ/X`?k return;
Ud_0{%@ xk7VuS* q = parseInt(q);
\;1nEjIA p = parseFloat(p);
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u9LZ txts[txts.length-1].value = (q * p).toFixed(2);
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pil }
s)#TT9BbV </script>
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qG3MyK%O\ 24.datagrid选定比较底下的行时,为什么总是刷新一下,然后就滚动到了最上面,刚才选定的行因屏幕的关系就看不到了。
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