初学ASP.Net时在论坛收藏收集的一些资料备忘

1. 打开新的窗口并传送参数:

传送参数:
response.write("

1<script>window.open('*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"')</script>

")

接收参数:
string a = Request.QueryString("id");
string b = Request.QueryString("id1");

2.为按钮添加对话框

Button1.Attributes.Add("onclick","return confirm('确认?')");

button.attributes.add("onclick","if(confirm('are you sure...?')){return true;}else{return false;}")

3.删除表格选定记录

int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];
string deleteCmd = "DELETE from Employee where emp_id = " + intEmpID.ToString()

4.删除表格记录警告
private void DataGrid_ItemCreated(Object sender,DataGridItemEventArgs e)
{
switch(e.Item.ItemType)
{
case ListItemType.Item :
case ListItemType.AlternatingItem :
case ListItemType.EditItem:
TableCell myTableCell;
myTableCell = e.Item.Cells[14];
LinkButton myDeleteButton ;
myDeleteButton = (LinkButton)myTableCell.Controls[0];
myDeleteButton.Attributes.Add("onclick","return confirm('您是否确定要删除这条信息');");
break;
default:
break;
}

}

5.点击表格行链接另一页

private void grdCustomer_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
//点击表格打开
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
e.Item.Attributes.Add("onclick","window.open('Default.aspx?id=" + e.Item.Cells[0].Text + "');");
}

双击表格连接到另一页
在itemDataBind事件中
if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
string OrderItemID =e.item.cells[1].Text;
...
e.item.Attributes.Add("ondblclick", "location.href='../ShippedGrid.aspx?id=" + OrderItemID + "'");
}
双击表格打开新一页
if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
{
string OrderItemID =e.item.cells[1].Text;
...
e.item.Attributes.Add("ondblclick", "open('../ShippedGrid.aspx?id=" + OrderItemID + "')");
}
★特别注意:【?id=】 处不能为 【?id =】

6.表格超连接列传递参数

1<asp:hyperlinkcolumn &="" ```'="" datatextfield="id" headertext="ID号" name='```
2# DataBinder.Eval(Container.DataItem, "数据字段2")
3```' navigateurl="aaa.aspx?id='```
4# DataBinder.Eval(Container.DataItem, " target="_blank" 数据字段1")=""></asp:hyperlinkcolumn>

**7.表格点击改变颜色
** if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)
{
e.Item.Attributes.Add("onclick","this.style.backgroundColor='#99cc00';this.style.color='buttontext';this.style.cursor='default';");
}

写在DataGrid的_ItemDataBound里
if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType == ListItemType.AlternatingItem)
{
e.Item.Attributes.Add("onmouseover","this.style.backgroundColor='#99cc00';this.style.color='buttontext';this.style.cursor='default';");
e.Item.Attributes.Add("onmouseout","this.style.backgroundColor='';this.style.color='';");
}

8.关于日期格式

日期格式设定
DataFormatString="{0:yyyy-MM-dd}"

我觉得应该在itembound事件中
e.items.cell["你的列"].text=DateTime.Parse(e.items.cell["你的列"].text.ToString("yyyy-MM-dd"))

**9.获取错误信息并到指定页面
** 不要使用Response.Redirect,而应该使用Server.Transfer
e.g
// in global.asax
protected void Application_Error(Object sender, EventArgs e) {
if (Server.GetLastError() is HttpUnhandledException)
Server.Transfer("MyErrorPage.aspx");

//其余的非HttpUnhandledException异常交给ASP.NET自己处理就okay了 :)
}

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

10.清空Cookie
Cookie.Expires=[DateTime];
Response.Cookies("UserName").Expires = 0

11.自定义异常处理

//自定义异常处理类
using System;
using System.Diagnostics;

namespace MyAppException
{
///

1<summary>   
2/// 从系统异常类ApplicationException继承的应用程序异常处理类。   
3/// 自动将异常内容记录到Windows NT/2000的应用程序日志   
4/// </summary>

public class AppException:System.ApplicationException
{
public AppException()
{
if (ApplicationConfiguration.EventLogEnabled)
LogEvent("出现一个未知错误。");
}

public AppException(string message)
{
LogEvent(message);
}

public AppException(string message,Exception innerException)
{
LogEvent(message);
if (innerException != null)
{
LogEvent(innerException.Message);
}
}

//日志记录类
using System;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Threading;

namespace MyEventLog
{
///

1<summary>   
2/// 事件日志记录类,提供事件日志记录支持   
3/// <remarks>   
4/// 定义了4个日志记录方法 (error, warning, info, trace)   
5/// </remarks>   
6/// </summary>

public class ApplicationLog
{
///

1<summary>   
2/// 将错误信息记录到Win2000/NT事件日志中   
3/// <param name="message"/>需要记录的文本信息   
4/// </summary>

public static void WriteError(String message)
{

WriteLog(TraceLevel.Error, message);
}

///

1<summary>   
2/// 将警告信息记录到Win2000/NT事件日志中   
3/// <param name="message"/>需要记录的文本信息   
4/// </summary>

public static void WriteWarning(String message)
{

WriteLog(TraceLevel.Warning, message);
}

///

1<summary>   
2/// 将提示信息记录到Win2000/NT事件日志中   
3/// <param name="message"/>需要记录的文本信息   
4/// </summary>

public static void WriteInfo(String message)
{
WriteLog(TraceLevel.Info, message);
}
///

1<summary>   
2/// 将跟踪信息记录到Win2000/NT事件日志中   
3/// <param name="message"/>需要记录的文本信息   
4/// </summary>

public static void WriteTrace(String message)
{

WriteLog(TraceLevel.Verbose, message);
}

///

1<summary>   
2/// 格式化记录到事件日志的文本信息格式   
3/// <param name="ex"/>需要格式化的异常对象   
4/// <param name="catchInfo"/>异常信息标题字符串.   
5/// <retvalue>   
6/// <para>格式后的异常信息字符串,包括异常内容和跟踪堆栈.</para>   
7/// </retvalue>   
8/// </summary>

public static String FormatException(Exception ex, String catchInfo)
{
StringBuilder strBuilder = new StringBuilder();
if (catchInfo != String.Empty)
{
strBuilder.Append(catchInfo).Append("\r\n");
}
strBuilder.Append(ex.Message).Append("\r\n").Append(ex.StackTrace);
return strBuilder.ToString();
}

///

1<summary>   
2/// 实际事件日志写入方法   
3/// <param name="level"/>要记录信息的级别(error,warning,info,trace).   
4/// <param name="messageText"/>要记录的文本.   
5/// </summary>

private static void WriteLog(TraceLevel level, String messageText)
{

try
{
EventLogEntryType LogEntryType;
switch (level)
{
case TraceLevel.Error:
LogEntryType = EventLogEntryType.Error;
break;
case TraceLevel.Warning:
LogEntryType = EventLogEntryType.Warning;
break;
case TraceLevel.Info:
LogEntryType = EventLogEntryType.Information;
break;
case TraceLevel.Verbose:
LogEntryType = EventLogEntryType.SuccessAudit;
break;
default:
LogEntryType = EventLogEntryType.SuccessAudit;
break;
}

EventLog eventLog = new EventLog("Application", ApplicationConfiguration.EventLogMachineName, ApplicationConfiguration.EventLogSourceName );
//写入事件日志
eventLog.WriteEntry(messageText, LogEntryType);

}
catch {} //忽略任何异常
}
} //class ApplicationLog
}

12.Panel 横向滚动,纵向自动扩展

1<asp:panel style="overflow-x:scroll;overflow-y:auto;"></asp:panel>

13.回车转换成Tab

1<script event="onkeydown" for="document" language="javascript">   
2if(event.keyCode==13 && event.srcElement.type!='button' && event.srcElement.type!='submit' && event.srcElement.type!='reset' && event.srcElement.type!=''&& event.srcElement.type!='textarea');   
3event.keyCode=9;   
4</script>

onkeydown="if(event.keyCode==13) event.keyCode=9"

http://dotnet.aspx.cc/exam/enter2tab.aspx

14.DataGrid超级连接列
DataNavigateUrlField="字段名" DataNavigateUrlFormatString=" http://xx/inc/delete.aspx?ID={0 }"

15.DataGrid行随鼠标变色
private void DGzf_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
if (e.Item.ItemType!=ListItemType.Header)
{
e.Item.Attributes.Add( "onmouseout","this.style.backgroundColor=""+e.Item.Style["BACKGROUND-COLOR"]+""");
e.Item.Attributes.Add( "onmouseover","this.style.backgroundColor=""+ "#EFF3F7"+""");
}

}

16.模板列

1<asp:templatecolumn headertext="ID" sortexpression="demo" visible="False">
2<itemtemplate>
3<asp:label id="lblColumn" runat="server" text='```
4# DataBinder.Eval(Container.DataItem, "ArticleID")
5```' width="80%"></asp:label>
6</itemtemplate>
7</asp:templatecolumn>
1<asp:templatecolumn headertext="选中">
2<headerstyle horizontalalign="Center" wrap="False"></headerstyle>
3<itemtemplate>
4<asp:checkbox id="chkExport" runat="server"></asp:checkbox>
5</itemtemplate>
6<edititemtemplate>
7<asp:checkbox enabled="true" id="chkExportON" runat="server"></asp:checkbox>
8</edititemtemplate>
9</asp:templatecolumn>

后台代码

protected void CheckAll_CheckedChanged(object sender, System.EventArgs e)
{
//改变列的选定,实现全选或全不选。
CheckBox chkExport ;
if( CheckAll.Checked)
{
foreach(DataGridItem oDataGridItem in MyDataGrid.Items)
{
chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
chkExport.Checked = true;
}
}
else
{
foreach(DataGridItem oDataGridItem in MyDataGrid.Items)
{
chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
chkExport.Checked = false;
}
}
}

17.数字格式化
【``` #Container.DataItem("price")

#Container.DataItem("price","{0:¥#,##0.00}")

1
2int i=123456;   
3string s=i.ToString("###,###.00"); 
4
5**18.日期格式化**
6
7【aspx页面内:```
8# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date")

显示为: 2004-8-11 19:44:28
我只想要:2004-8-11 】

1# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date","{0:yyyy-M-d}")

应该如何改?

【格式化日期】
取出来,一般是object
((DateTime)objectFromDB).ToString("yyyy-MM-dd");

【日期的验证表达式】
A.以下正确的输入格式: [2004-2-29], [2004-02-29 10:29:39 pm], [2004/12/31]

^((\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})))?$

B.以下正确的输入格式:[0001-12-31], [9999 09 30], [2002/03/03]

^\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]))$

【大小写转换】

HttpUtility.HtmlEncode(string);
HttpUtility.HtmlDecode(string)

19.如何设定全局变量
Global.asax中

Application_Start()事件中

添加Application[属性名] = xxx;

就是你的全局变量

20.怎样作到HyperLinkColumn生成的连接后,点击连接,打开新窗口?

HyperLinkColumn有个属性Target,将器值设置成"_blank"即可.(Target="_blank")

【ASPNETMENU】点击菜单项弹出新窗口
在你的menuData.xml文件的菜单项中加入URLTarget="_blank"
如:

 1<menudata imagesbaseurl="images/">
 2<menugroup>
 3<menuitem label="内参信息" url="Infomation.aspx"/>
 4<menugroup id="BBC">
 5<menuitem label="公告信息" lefticon="file.gif" url="Infomation.aspx" urltarget="_blank">
 6<menuitem label="编制信息简报" lefticon="file.gif" url="NewInfo.aspx"/>   
 7......   
 8最好将你的aspnetmenu升级到1.2版 
 9
10**21.委托讨论**   
11http://community.csdn.net/Expert/topic/2651/2651579.xml?temp=.7183191   
12http://dev.csdn.net/develop/article/22/22951.shtm 
13
14**22.读取DataGrid控件TextBox值**
15
16foreach(DataGrid dgi in yourDataGrid.Items)   
17{   
18TextBox tb = (TextBox)dgi.FindControl("yourTextBoxId");   
19tb.Text....   
20} 
21
22**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?**
23
24〖思归〗   
25<asp:templatecolumn headertext="数量">
26<itemtemplate>
27<asp:textbox id="ShuLiang" onkeyup="javascript:DoCal()" runat="server" text='```
28# DataBinder.Eval(Container.DataItem,"DG_ShuLiang")
29```'></asp:textbox>
30<asp:regularexpressionvalidator controltovalidate="ShuLiang" errormessage="must be integer" id="revS" runat="server" validationexpression="^\d+$"></asp:regularexpressionvalidator>
31</itemtemplate>
32</asp:templatecolumn>
33<asp:templatecolumn headertext="单价">
34<itemtemplate>
35<asp:textbox id="DanJian" onkeyup="javascript:DoCal()" runat="server" text='```
36# DataBinder.Eval(Container.DataItem,"DG_DanJian")
37```'></asp:textbox>
38<asp:regularexpressionvalidator controltovalidate="DanJian" errormessage="must be numeric" id="revS2" runat="server" validationexpression="^\d+(\\.\d*)?$"></asp:regularexpressionvalidator>
39</itemtemplate>
40</asp:templatecolumn>
41<asp:templatecolumn headertext="金额">
42<itemtemplate>
43<asp:textbox id="JinE" runat="server" text='```
44# DataBinder.Eval(Container.DataItem,"DG_JinE")
45```'></asp:textbox>
46</itemtemplate>
47</asp:templatecolumn>
48<script language="javascript">   
49function DoCal()   
50{   
51var e = event.srcElement;   
52var row = e.parentNode.parentNode;   
53var txts = row.all.tags("INPUT");   
54if (!txts.length || txts.length < 3)   
55return;   
56  
57var q = txts[txts.length-3].value;   
58var p = txts[txts.length-2].value; 
59
60if (isNaN(q) || isNaN(p))   
61return; 
62
63q = parseInt(q);   
64p = parseFloat(p); 
65
66txts[txts.length-1].value = (q * p).toFixed(2);   
67}   
68</script>
69
70**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**   
71page_load   
72page.smartNavigation=true 
73
74**25.在Datagrid中修改数据,当点击编辑键时,数据出现在文本框中,怎么控制文本框的大小 ?**
75
76private void DataGrid1_ItemDataBound(obj sender,DataGridItemEventArgs e)   
77{   
78for(int i=0;i<e.item.cells.count-1;i++) "80px")="" **26.对话框**="" e.item.cells[i].attributes.add("width",="" if(e.item.itemtype="ListItemType.EditType)" javascript\"="" private="" scriptbegin="&lt;script language=\" static="" string="" {="" }="">";   
79private static string ScriptEnd = ""; 
80
81public static void ConfirmMessageBox(string PageTarget,string Content)   
82{ 
83
84string ConfirmContent="var retValue=window.confirm('"+Content+"');"+"if(retValue){window.location='"+PageTarget+"';}";   
85  
86ConfirmContent=ScriptBegin + ConfirmContent + ScriptEnd;   
87  
88Page ParameterPage = (Page)System.Web.HttpContext.Current.Handler;   
89ParameterPage.RegisterStartupScript("confirm",ConfirmContent);   
90//Response.Write(strScript);   
91  
92} 
93
94  
95
96
97**作者Blog:** http://blog.csdn.net/JadyZhu/</e.item.cells.count-1;i++)></menuitem></menugroup></menugroup></menudata>
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