ASP.NET常用方法
1.//彈出對話框.點擊轉向指定頁面
Response.Write("<script>window.alert('該會員沒有提交申請,請重新提交!')</script>");
Response.Write("<script>window.location ='http://www.51aspx.com/bizpulic/upmeb.aspx'</script>");
2.//彈出對話框
Response.Write("<script language='javascript'>alert('產品添加成功!')</script >");//頁面會刷新
3.//刪除文件
string filename ="20059595157517.jpg";
pub.util.DeleteFile(HttpContext.Current.Server.MapPath("../file/")+filename);
4.//綁定下拉列表框datalist
System.Data.DataView dv=conn.Exec_ex("select -1 as code,'請選擇經營模式' as content from dealin union select code,content from dealin");
this.dealincode.DataSource=dv;
this.dealincode.DataTextField="content";
this.dealincode.DataValueField="code";
this.dealincode.DataBind();
this.dealincode.Items.FindByValue(dv[0]["dealincode"].ToString()).Selected=true;
5.//時間去秒顯示
<%# System.DateTime.Parse(DataBinder.Eval(Container.DataItem,"begtime").ToString()).ToShortDateString()%>
6.//標題帶鏈接
<%# "<a class=\"12c\" target=\"_blank\" href=\"http://www.51aspx/CV/_%22+DataBinder.Eval(Container.DataItem,%22procode%22)+%22.html/">"+ DataBinder.Eval(Container.DataItem,"proname")+"</a>"%>//這個網站的首頁新聞處常用
7.//修改轉向
<%# "<A href=\"editpushpro.aspx?id="+DataBinder.Eval(Container.DataItem,"code")+"\">"+"修改"+"</A>"%>
8.//彈出確定按鈕
<%# "<A id=\"btnDelete\" οnclick=\"return confirm('你是否確定刪除這條記錄嗎?');\" href=\"pushproduct.aspx?dl="+DataBinder.Eval(Container.DataItem,"code")+" \">"+"刪除"+"</A>"%>
9.//輸出數據格式化 "{0:F2}" 是格式 F2表示小數點後剩兩位
<%# DataBinder.Eval(Container, "DataItem.PriceMoney","{0:F2}") %>
10.//提取動態網頁內容
Uri uri = new Uri("http://www.51aspx.com/");
WebRequest req = WebRequest.Create(uri);
WebResponse resp = req.GetResponse();
Stream str = resp.GetResponseStream();
StreamReader sr = new StreamReader(str,System.Text.Encoding.Default);
string t = sr.ReadToEnd();
this.Response.Write(t.ToString());
11.//獲取" . "後面的字符
i.ToString().Trim().Substring(i.ToString().Trim().LastIndexOf(".")+1).ToLower().Trim()
12. 打開新的窗口並傳送參數:
傳送參數:
response.write("<script>window.open('*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"')</script>")
接收參數:
string a = Request.QueryString("id");
string b = Request.QueryString("id1");
12.爲按鈕添加對話框
Button1.Attributes.Add("onclick","return confirm('確認?')");
button.attributes.add("onclick","if(confirm('are you sure...?')){return true;}else{return false;}")
13.刪除表格選定記錄
int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];
string deleteCmd = "Delete from Employee where emp_id = " + intEmpID.ToString()
14.刪除表格記錄警告
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('您是否確定要刪除這條信息');");
break;
default:
break;
}
}
15.點擊表格行鏈接另一頁
private void grdCustomer_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
//點擊表格打開
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 + "');");
}
雙擊表格連接到另一頁
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 + "'");
}
雙擊表格打開新一頁
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 + "')");
}
16.表格超連接列傳遞參數
<asp:HyperLinkColumn Target="_blank" headertext="ID號" DataTextField="id" NavigateUrl="aaa.aspx?id='
<%# DataBinder.Eval(Container.DataItem, "數據字段1")%>' & name='<%# DataBinder.Eval(Container.DataItem, "數據字段2")%>' />
17.表格點擊改變顏色
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';");
}
寫在DataGrid的_ItemDataBound裏
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='';");
}
18.關於日期格式
日期格式設定
DataFormatString="{0:yyyy-MM-dd}"
我覺得應該在itembound事件中
e.items.cell["你的列"].text=DateTime.Parse(e.items.cell["你的列"].text.ToString("yyyy-MM-dd"))
19.獲取錯誤信息併到指定頁面
不要使用Response.Redirect,而應該使用Server.Transfer
e.g
// in global.asax
protected void Application_Error(Object sender, EventArgs e) {
if (Server.GetLastError() is HttpUnhandledException)
Server.Transfer("MyErrorPage.aspx");
//其餘的非HttpUnhandledException異常交給ASP.NET自己處理就okay了 :)
}
Redirect會導致post-back的產生從而丟失了錯誤信息,所以頁面導向應該直接在服務器端執行,這樣就可以在錯誤處理頁面得到出錯信息並進行相應的處理
20.清空Cookie
Cookie.Expires=[DateTime];
Response.Cookies("UserName").Expires = 0
21.自定義異常處理
//自定義異常處理類
using System;
using System.Diagnostics;
namespace MyAppException
{
/// <summary>
/// 從系統異常類ApplicationException繼承的應用程序異常處理類。
/// 自動將異常內容記錄到Windows NT/2000的應用程序日誌
/// </summary>
public class AppException:System.ApplicationException
{
public AppException()
{
if (ApplicationConfiguration.EventLogEnabled)LogEvent("出現一個未知錯誤。");
}
public AppException(string message)
{
LogEvent(message);
}
public AppException(string message,Exception innerException)
{
LogEvent(message);
if (innerException != null)
{
LogEvent(innerException.Message);
}
}
//日誌記錄類
using System;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Threading;
namespace MyEventLog
{
/// <summary>
/// 事件日誌記錄類,提供事件日誌記錄支持
/// <remarks>
/// 定義了4個日誌記錄方法 (error, warning, info, trace)
/// </remarks>
/// </summary>
public class ApplicationLog
{
/// <summary>
/// 將錯誤信息記錄到Win2000/NT事件日誌中
/// <param name="message">需要記錄的文本信息</param>
/// </summary>
public static void WriteError(String message)
{
WriteLog(TraceLevel.Error, message);
}
/// <summary>
/// 將警告信息記錄到Win2000/NT事件日誌中
/// <param name="message">需要記錄的文本信息</param>
/// </summary>
public static void WriteWarning(String message)
{
WriteLog(TraceLevel.Warning, message);
}
/// <summary>
/// 將提示信息記錄到Win2000/NT事件日誌中
/// <param name="message">需要記錄的文本信息</param>
/// </summary>
public static void WriteInfo(String message)
{
WriteLog(TraceLevel.Info, message);
}
/// <summary>
/// 將跟蹤信息記錄到Win2000/NT事件日誌中
/// <param name="message">需要記錄的文本信息</param>
/// </summary>
public static void WriteTrace(String message)
{
WriteLog(TraceLevel.Verbose, message);
}
/// <summary>
/// 格式化記錄到事件日誌的文本信息格式
/// <param name="ex">需要格式化的異常對象</param>
/// <param name="catchInfo">異常信息標題字符串.</param>
/// <retvalue>
/// <para>格式後的異常信息字符串,包括異常內容和跟蹤堆棧.</para>
/// </retvalue>
/// </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();
}
/// <summary>
/// 實際事件日誌寫入方法
/// <param name="level">要記錄信息的級別(error,warning,info,trace).</param>
/// <param name="messageText">要記錄的文本.</param>
/// </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 );
//寫入事件日誌
eventLog.WriteEntry(messageText, LogEntryType);
}
catch {} //忽略任何異常
}
} //class ApplicationLog
}
22.Panel 橫向滾動,縱向自動擴展
<asp:panel style="overflow-x:scroll;overflow-y:auto;"></asp:panel>
23.回車轉換成Tab
(1)
<script language="javascript" for="document" event="onkeydown">
if(event.keyCode==13 && event.srcElement.type!='button' && event.srcElement.type!='submit' && event.srcElement.type!='reset' && event.srcElement.type!=''&& event.srcElement.type!='textarea');
event.keyCode=9;
</script>
(2) //當在有keydown事件的控件上敲回車時,變爲tab
public void Tab(System.Web .UI.WebControls .WebControl webcontrol)
{
webcontrol.Attributes .Add ("onkeydown", "if(event.keyCode==13) event.keyCode=9");
}
24.DataGrid超級連接列
DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http://xx/inc/delete.aspx?ID={0}"
25.DataGrid行隨鼠標變色
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"+"\"");
}
}
26.模板列
<ASP:TEMPLATECOLUMN visible="False" sortexpression="demo" headertext="ID">
<ITEMTEMPLATE>
<ASP LABEL text='<%# DataBinder.Eval(Container.DataItem, "ArticleID")%>' runat="server" width="80%" id="lblColumn" />
</ITEMTEMPLATE>
</ASP:TEMPLATECOLUMN>
<ASP:TEMPLATECOLUMN headertext="選中">
<HEADERSTYLE wrap="False" horiz></HEADERSTYLE>
<ITEMTEMPLATE>
<ASP:CHECKBOX id="chkExport" runat="server" />
</ITEMTEMPLATE>
<EDITITEMTEMPLATE>
<ASP:CHECKBOX id="chkExportON" runat="server" enabled="true" />
</EDITITEMTEMPLATE>
</ASP:TEMPLATECOLUMN>
後臺代碼
protected void CheckAll_CheckedChanged(object sender, System.EventArgs e)
{
//改變列的選定,實現全選或全不選。
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;
}
}
}
27.數字格式化
【<%#Container.DataItem("price")%>的結果是500.0000,怎樣格式化爲500.00?】
<%#Container.DataItem("price","{0:¥#,##0.00}")%>
int i=123456;
string s=i.ToString("###,###.00");
28.日期格式化
【aspx頁面內:<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date")%>
顯示爲: 2004-8-11 19:44:28
我只想要:2004-8-11 】
<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date","{0:yyyy-M-d}")%>
應該如何改?
【格式化日期】
取出來,一般是object((DateTime)objectFromDB).ToString("yyyy-MM-dd");
【日期的驗證表達式】
A.以下正確的輸入格式: [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.以下正確的輸入格式:[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]))$
【大小寫轉換】
HttpUtility.HtmlEncode(string);
HttpUtility.HtmlDecode(string)
29.如何設定全局變量
Global.asax中
Application_Start()事件中
添加Application[屬性名] = xxx;
就是你的全局變量
30.怎樣作到HyperLinkColumn生成的連接後,點擊連接,打開新窗口?
HyperLinkColumn有個屬性Target,將器值設置成"_blank"即可.(Target="_blank")
【ASPNETMENU】點擊菜單項彈出新窗口
在你的menuData.xml文件的菜單項中加入URLTarget="_blank",如:
<?xml version="1.0" encoding="GB2312"?>
<MenuData ImagesBaseURL="images/">
<MenuGroup>
<MenuItem Label="內參信息" URL="Infomation.aspx" >
<MenuGroup ID="BBC">
<MenuItem Label="公告信息" URL="Infomation.aspx" URLTarget="_blank" LeftIcon="file.gif"/>
<MenuItem Label="編制信息簡報" URL="NewInfo.aspx" LeftIcon="file.gif" />
最好將你的aspnetmenu升級到1.2版
31.讀取DataGrid控件TextBox值
foreach(DataGrid dgi in yourDataGrid.Items)
{
TextBox tb = (TextBox)dgi.FindControl("yourTextBoxId");
tb.Text....
}
33. 在DataGrid中有3個模板列包含Textbox分別爲 DG_ShuLiang (數量) DG_DanJian(單價) DG_JinE(金額)分別在5.6.7列,要求在錄入數量及單價的時候自動算出金額即:數量*單價=金額還要求錄入時限制爲 數值型.我如何用客戶端腳本實現這個功能?
<asp:TemplateColumn HeaderText="數量">
<ItemTemplate>
<asp:TextBox id="ShuLiang" runat='server' Text='<%# DataBinder.Eval(Container.DataItem,"DG_ShuLiang")%>'
/>
<asp:RegularExpressionValidator id="revS" runat="server" C ErrorMessage="must be integer" Validati />
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="單價">
<ItemTemplate>
<asp:TextBox id="DanJian" runat='server' Text='<%# DataBinder.Eval(Container.DataItem,"DG_DanJian")%>'
/>
<asp:RegularExpressionValidator id="revS2" runat="server" C ErrorMessage="must be numeric" Validati />
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="金額">
<ItemTemplate>
<asp:TextBox id="JinE" runat='server' Text='<%# DataBinder.Eval(Container.DataItem,"DG_JinE")%>' />
</ItemTemplate>
</asp:TemplateColumn><script language="javascript">
function DoCal()
{
var e = event.srcElement;
var row = e.parentNode.parentNode;
var txts = row.all.tags("INPUT");
if (!txts.length || txts.length < 3)
return;
var q = txts[txts.length-3].value;
var p = txts[txts.length-2].value;
if (isNaN(q) || isNaN(p))
return;
q = parseInt(q);
p = parseFloat(p);
txts[txts.length-1].value = (q * p).toFixed(2);
}
</script>
34.datagrid選定比較底下的行時,爲什麼總是刷新一下,然後就滾動到了最上面,剛纔選定的行因屏幕的關係就看不到了。
page_load
page.smartNavigation=true
Response.Write("<script>window.alert('該會員沒有提交申請,請重新提交!')</script>");
Response.Write("<script>window.location ='http://www.51aspx.com/bizpulic/upmeb.aspx'</script>");
2.//彈出對話框
Response.Write("<script language='javascript'>alert('產品添加成功!')</script >");//頁面會刷新
3.//刪除文件
string filename ="20059595157517.jpg";
pub.util.DeleteFile(HttpContext.Current.Server.MapPath("../file/")+filename);
4.//綁定下拉列表框datalist
System.Data.DataView dv=conn.Exec_ex("select -1 as code,'請選擇經營模式' as content from dealin union select code,content from dealin");
this.dealincode.DataSource=dv;
this.dealincode.DataTextField="content";
this.dealincode.DataValueField="code";
this.dealincode.DataBind();
this.dealincode.Items.FindByValue(dv[0]["dealincode"].ToString()).Selected=true;
5.//時間去秒顯示
<%# System.DateTime.Parse(DataBinder.Eval(Container.DataItem,"begtime").ToString()).ToShortDateString()%>
6.//標題帶鏈接
<%# "<a class=\"12c\" target=\"_blank\" href=\"http://www.51aspx/CV/_%22+DataBinder.Eval(Container.DataItem,%22procode%22)+%22.html/">"+ DataBinder.Eval(Container.DataItem,"proname")+"</a>"%>//這個網站的首頁新聞處常用
7.//修改轉向
<%# "<A href=\"editpushpro.aspx?id="+DataBinder.Eval(Container.DataItem,"code")+"\">"+"修改"+"</A>"%>
8.//彈出確定按鈕
<%# "<A id=\"btnDelete\" οnclick=\"return confirm('你是否確定刪除這條記錄嗎?');\" href=\"pushproduct.aspx?dl="+DataBinder.Eval(Container.DataItem,"code")+" \">"+"刪除"+"</A>"%>
9.//輸出數據格式化 "{0:F2}" 是格式 F2表示小數點後剩兩位
<%# DataBinder.Eval(Container, "DataItem.PriceMoney","{0:F2}") %>
10.//提取動態網頁內容
Uri uri = new Uri("http://www.51aspx.com/");
WebRequest req = WebRequest.Create(uri);
WebResponse resp = req.GetResponse();
Stream str = resp.GetResponseStream();
StreamReader sr = new StreamReader(str,System.Text.Encoding.Default);
string t = sr.ReadToEnd();
this.Response.Write(t.ToString());
11.//獲取" . "後面的字符
i.ToString().Trim().Substring(i.ToString().Trim().LastIndexOf(".")+1).ToLower().Trim()
12. 打開新的窗口並傳送參數:
傳送參數:
response.write("<script>window.open('*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"')</script>")
接收參數:
string a = Request.QueryString("id");
string b = Request.QueryString("id1");
12.爲按鈕添加對話框
Button1.Attributes.Add("onclick","return confirm('確認?')");
button.attributes.add("onclick","if(confirm('are you sure...?')){return true;}else{return false;}")
13.刪除表格選定記錄
int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];
string deleteCmd = "Delete from Employee where emp_id = " + intEmpID.ToString()
14.刪除表格記錄警告
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('您是否確定要刪除這條信息');");
break;
default:
break;
}
}
15.點擊表格行鏈接另一頁
private void grdCustomer_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
//點擊表格打開
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 + "');");
}
雙擊表格連接到另一頁
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 + "'");
}
雙擊表格打開新一頁
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 + "')");
}
16.表格超連接列傳遞參數
<asp:HyperLinkColumn Target="_blank" headertext="ID號" DataTextField="id" NavigateUrl="aaa.aspx?id='
<%# DataBinder.Eval(Container.DataItem, "數據字段1")%>' & name='<%# DataBinder.Eval(Container.DataItem, "數據字段2")%>' />
17.表格點擊改變顏色
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';");
}
寫在DataGrid的_ItemDataBound裏
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='';");
}
18.關於日期格式
日期格式設定
DataFormatString="{0:yyyy-MM-dd}"
我覺得應該在itembound事件中
e.items.cell["你的列"].text=DateTime.Parse(e.items.cell["你的列"].text.ToString("yyyy-MM-dd"))
19.獲取錯誤信息併到指定頁面
不要使用Response.Redirect,而應該使用Server.Transfer
e.g
// in global.asax
protected void Application_Error(Object sender, EventArgs e) {
if (Server.GetLastError() is HttpUnhandledException)
Server.Transfer("MyErrorPage.aspx");
//其餘的非HttpUnhandledException異常交給ASP.NET自己處理就okay了 :)
}
Redirect會導致post-back的產生從而丟失了錯誤信息,所以頁面導向應該直接在服務器端執行,這樣就可以在錯誤處理頁面得到出錯信息並進行相應的處理
20.清空Cookie
Cookie.Expires=[DateTime];
Response.Cookies("UserName").Expires = 0
21.自定義異常處理
//自定義異常處理類
using System;
using System.Diagnostics;
namespace MyAppException
{
/// <summary>
/// 從系統異常類ApplicationException繼承的應用程序異常處理類。
/// 自動將異常內容記錄到Windows NT/2000的應用程序日誌
/// </summary>
public class AppException:System.ApplicationException
{
public AppException()
{
if (ApplicationConfiguration.EventLogEnabled)LogEvent("出現一個未知錯誤。");
}
public AppException(string message)
{
LogEvent(message);
}
public AppException(string message,Exception innerException)
{
LogEvent(message);
if (innerException != null)
{
LogEvent(innerException.Message);
}
}
//日誌記錄類
using System;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Threading;
namespace MyEventLog
{
/// <summary>
/// 事件日誌記錄類,提供事件日誌記錄支持
/// <remarks>
/// 定義了4個日誌記錄方法 (error, warning, info, trace)
/// </remarks>
/// </summary>
public class ApplicationLog
{
/// <summary>
/// 將錯誤信息記錄到Win2000/NT事件日誌中
/// <param name="message">需要記錄的文本信息</param>
/// </summary>
public static void WriteError(String message)
{
WriteLog(TraceLevel.Error, message);
}
/// <summary>
/// 將警告信息記錄到Win2000/NT事件日誌中
/// <param name="message">需要記錄的文本信息</param>
/// </summary>
public static void WriteWarning(String message)
{
WriteLog(TraceLevel.Warning, message);
}
/// <summary>
/// 將提示信息記錄到Win2000/NT事件日誌中
/// <param name="message">需要記錄的文本信息</param>
/// </summary>
public static void WriteInfo(String message)
{
WriteLog(TraceLevel.Info, message);
}
/// <summary>
/// 將跟蹤信息記錄到Win2000/NT事件日誌中
/// <param name="message">需要記錄的文本信息</param>
/// </summary>
public static void WriteTrace(String message)
{
WriteLog(TraceLevel.Verbose, message);
}
/// <summary>
/// 格式化記錄到事件日誌的文本信息格式
/// <param name="ex">需要格式化的異常對象</param>
/// <param name="catchInfo">異常信息標題字符串.</param>
/// <retvalue>
/// <para>格式後的異常信息字符串,包括異常內容和跟蹤堆棧.</para>
/// </retvalue>
/// </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();
}
/// <summary>
/// 實際事件日誌寫入方法
/// <param name="level">要記錄信息的級別(error,warning,info,trace).</param>
/// <param name="messageText">要記錄的文本.</param>
/// </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 );
//寫入事件日誌
eventLog.WriteEntry(messageText, LogEntryType);
}
catch {} //忽略任何異常
}
} //class ApplicationLog
}
22.Panel 橫向滾動,縱向自動擴展
<asp:panel style="overflow-x:scroll;overflow-y:auto;"></asp:panel>
23.回車轉換成Tab
(1)
<script language="javascript" for="document" event="onkeydown">
if(event.keyCode==13 && event.srcElement.type!='button' && event.srcElement.type!='submit' && event.srcElement.type!='reset' && event.srcElement.type!=''&& event.srcElement.type!='textarea');
event.keyCode=9;
</script>
(2) //當在有keydown事件的控件上敲回車時,變爲tab
public void Tab(System.Web .UI.WebControls .WebControl webcontrol)
{
webcontrol.Attributes .Add ("onkeydown", "if(event.keyCode==13) event.keyCode=9");
}
24.DataGrid超級連接列
DataNavigateUrlField="字段名" DataNavigateUrlFormatString="http://xx/inc/delete.aspx?ID={0}"
25.DataGrid行隨鼠標變色
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"+"\"");
}
}
26.模板列
<ASP:TEMPLATECOLUMN visible="False" sortexpression="demo" headertext="ID">
<ITEMTEMPLATE>
<ASP LABEL text='<%# DataBinder.Eval(Container.DataItem, "ArticleID")%>' runat="server" width="80%" id="lblColumn" />
</ITEMTEMPLATE>
</ASP:TEMPLATECOLUMN>
<ASP:TEMPLATECOLUMN headertext="選中">
<HEADERSTYLE wrap="False" horiz></HEADERSTYLE>
<ITEMTEMPLATE>
<ASP:CHECKBOX id="chkExport" runat="server" />
</ITEMTEMPLATE>
<EDITITEMTEMPLATE>
<ASP:CHECKBOX id="chkExportON" runat="server" enabled="true" />
</EDITITEMTEMPLATE>
</ASP:TEMPLATECOLUMN>
後臺代碼
protected void CheckAll_CheckedChanged(object sender, System.EventArgs e)
{
//改變列的選定,實現全選或全不選。
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;
}
}
}
27.數字格式化
【<%#Container.DataItem("price")%>的結果是500.0000,怎樣格式化爲500.00?】
<%#Container.DataItem("price","{0:¥#,##0.00}")%>
int i=123456;
string s=i.ToString("###,###.00");
28.日期格式化
【aspx頁面內:<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date")%>
顯示爲: 2004-8-11 19:44:28
我只想要:2004-8-11 】
<%# DataBinder.Eval(Container.DataItem,"Company_Ureg_Date","{0:yyyy-M-d}")%>
應該如何改?
【格式化日期】
取出來,一般是object((DateTime)objectFromDB).ToString("yyyy-MM-dd");
【日期的驗證表達式】
A.以下正確的輸入格式: [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.以下正確的輸入格式:[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]))$
【大小寫轉換】
HttpUtility.HtmlEncode(string);
HttpUtility.HtmlDecode(string)
29.如何設定全局變量
Global.asax中
Application_Start()事件中
添加Application[屬性名] = xxx;
就是你的全局變量
30.怎樣作到HyperLinkColumn生成的連接後,點擊連接,打開新窗口?
HyperLinkColumn有個屬性Target,將器值設置成"_blank"即可.(Target="_blank")
【ASPNETMENU】點擊菜單項彈出新窗口
在你的menuData.xml文件的菜單項中加入URLTarget="_blank",如:
<?xml version="1.0" encoding="GB2312"?>
<MenuData ImagesBaseURL="images/">
<MenuGroup>
<MenuItem Label="內參信息" URL="Infomation.aspx" >
<MenuGroup ID="BBC">
<MenuItem Label="公告信息" URL="Infomation.aspx" URLTarget="_blank" LeftIcon="file.gif"/>
<MenuItem Label="編制信息簡報" URL="NewInfo.aspx" LeftIcon="file.gif" />
最好將你的aspnetmenu升級到1.2版
31.讀取DataGrid控件TextBox值
foreach(DataGrid dgi in yourDataGrid.Items)
{
TextBox tb = (TextBox)dgi.FindControl("yourTextBoxId");
tb.Text....
}
33. 在DataGrid中有3個模板列包含Textbox分別爲 DG_ShuLiang (數量) DG_DanJian(單價) DG_JinE(金額)分別在5.6.7列,要求在錄入數量及單價的時候自動算出金額即:數量*單價=金額還要求錄入時限制爲 數值型.我如何用客戶端腳本實現這個功能?
<asp:TemplateColumn HeaderText="數量">
<ItemTemplate>
<asp:TextBox id="ShuLiang" runat='server' Text='<%# DataBinder.Eval(Container.DataItem,"DG_ShuLiang")%>'
/>
<asp:RegularExpressionValidator id="revS" runat="server" C ErrorMessage="must be integer" Validati />
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="單價">
<ItemTemplate>
<asp:TextBox id="DanJian" runat='server' Text='<%# DataBinder.Eval(Container.DataItem,"DG_DanJian")%>'
/>
<asp:RegularExpressionValidator id="revS2" runat="server" C ErrorMessage="must be numeric" Validati />
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="金額">
<ItemTemplate>
<asp:TextBox id="JinE" runat='server' Text='<%# DataBinder.Eval(Container.DataItem,"DG_JinE")%>' />
</ItemTemplate>
</asp:TemplateColumn><script language="javascript">
function DoCal()
{
var e = event.srcElement;
var row = e.parentNode.parentNode;
var txts = row.all.tags("INPUT");
if (!txts.length || txts.length < 3)
return;
var q = txts[txts.length-3].value;
var p = txts[txts.length-2].value;
if (isNaN(q) || isNaN(p))
return;
q = parseInt(q);
p = parseFloat(p);
txts[txts.length-1].value = (q * p).toFixed(2);
}
</script>
34.datagrid選定比較底下的行時,爲什麼總是刷新一下,然後就滾動到了最上面,剛纔選定的行因屏幕的關係就看不到了。
page_load
page.smartNavigation=true
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