摘自: skyline0217 ASP.NET程式中常用的33種程式碼
1. 打開新的視窗並傳送參數:
傳送參數:
response.write("<script>window.open(’*.aspx?id="+this.DropDownList1.SelectIndex+"&id1="+...+"’)</script>");
接收參數:
protected void Page_Load(object sender, EventArgs e)
{
sCLINIC_DATE = Context.Request.QueryString["CLINIC_DATE"];
sID_NO = Context.Request.QueryString["ID_NO"];
}
{
sCLINIC_DATE = Context.Request.QueryString["CLINIC_DATE"];
sID_NO = Context.Request.QueryString["ID_NO"];
}
2.為按鈕新增對話方塊
Button1.Attributes.Add("onclick","return confirm(’確認?’)");
button.attributes.add("onclick","if(confirm(’are you sure...?’)){return true;}else{return false;}")
button.attributes.add("onclick","if(confirm(’are you sure...?’)){return true;}else{return false;}")
3.刪除表格指定紀錄
int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];
string deleteCmd = "DELETE from Employee where emp_id = " + intEmpID.ToString()
4.刪除表格紀錄警告
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資訊’);");
break;
default:
break;
}
}
5.點擊表格行連結另一頁
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 + "’);");
}
{
//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 + "’");
}
雙擊表格另開新頁
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 + "’)");
}
{
string OrderItemID =e.item.cells[1].Text;
...
e.item.Attributes.Add("ondblclick", "open(’../ShippedGrid.aspx?id=" + OrderItemID + "’)");
}
6.表格超連結列傳遞參數
<asp:HyperLinkColumn Target="_blank" headertext="ID號" DataTextField="id" NavigateUrl="aaa.aspx?id=’
<%# DataBinder.Eval(Container.DataItem, "數據欄位1")%>’ & name=’<%# DataBinder.Eval(Container.DataItem, "數據欄位2")%>’ />
<%# DataBinder.Eval(Container.DataItem, "數據欄位1")%>’ & name=’<%# DataBinder.Eval(Container.DataItem, "數據欄位2")%>’ />
7.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=’’;");
}
8.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"))
9.獲取錯誤資訊並到指定頁面
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HttpUnhandledExceptionException交給ASP.NET自己處理就okay了 :)
}
protected void Application_Error(Object sender, EventArgs e) {
if (Server.GetLastError() is HttpUnhandledException)
Server.Transfer("MyErrorPage.aspx");
//其餘的非HttpUnhandledExceptionException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資訊,所以頁面導向應該直接在伺服器端執行,這樣就可以在錯誤處理頁面得到出錯資訊並進行相應的處理
10.清空Cookie
Cookie.Expires=[DateTime];
Response.Cookies("UserName").Expires = 0
11.自定義Exception處理
//自定義Exception處理類別
using System;
using System.Diagnostics;
namespace MyAppException
{
/// <summary>
/// 從系統Exception類別ApplicationException繼承的應用程式Exception處理類別。
/// 自動將Exception內容紀錄到Windows NT/2000的應用程式日誌
/// </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);
}
}
//日誌紀錄類別
using System;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Threading;
namespace MyEventLog
{
/// <summary>
/// 事件日誌紀錄類別,提供事件日誌紀錄支援
/// <remarks>
/// 定義了4個日誌紀錄方法 (error, warning, info, trace)
/// </remarks>
/// </summary>
public class ApplicationLog
{
/// <summary>
/// 將錯誤資訊紀錄到Win2000/NT事件日誌中
/// <param name="message">需要紀錄的文件資訊</param>
/// </summary>
public static void WriteError(String message)
{
WriteLog(TraceLevel.Error, message);
}
/// <summary>
/// 將警告資訊紀錄到Win2000/NT事件日誌中
/// <param name="message">需要紀錄的文件資訊</param>
/// </summary>
using System;
using System.Diagnostics;
namespace MyAppException
{
/// <summary>
/// 從系統Exception類別ApplicationException繼承的應用程式Exception處理類別。
/// 自動將Exception內容紀錄到Windows NT/2000的應用程式日誌
/// </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);
}
}
//日誌紀錄類別
using System;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using System.Text;
using System.Threading;
namespace MyEventLog
{
/// <summary>
/// 事件日誌紀錄類別,提供事件日誌紀錄支援
/// <remarks>
/// 定義了4個日誌紀錄方法 (error, warning, info, trace)
/// </remarks>
/// </summary>
public class ApplicationLog
{
/// <summary>
/// 將錯誤資訊紀錄到Win2000/NT事件日誌中
/// <param name="message">需要紀錄的文件資訊</param>
/// </summary>
public static void WriteError(String message)
{
WriteLog(TraceLevel.Error, message);
}
/// <summary>
/// 將警告資訊紀錄到Win2000/NT事件日誌中
/// <param name="message">需要紀錄的文件資訊</param>
/// </summary>
public static void WriteWarning(String message)
{
WriteLog(TraceLevel.Warning, message);
}
/// <summary>
/// 將提示資訊紀錄到Win2000/NT事件日誌中
/// <param name="message">需要紀錄的文件資訊</param>
/// </summary>
public static void WriteInfo(String message)
{
WriteLog(TraceLevel.Info, message);
}
/// <summary>
/// 將Trace資訊紀錄到Win2000/NT事件日誌中
/// <param name="message">需要紀錄的文件資訊</param>
/// </summary>
public static void WriteTrace(String message)
{
WriteLog(TraceLevel.Verbose, message);
}
{
WriteLog(TraceLevel.Warning, message);
}
/// <summary>
/// 將提示資訊紀錄到Win2000/NT事件日誌中
/// <param name="message">需要紀錄的文件資訊</param>
/// </summary>
public static void WriteInfo(String message)
{
WriteLog(TraceLevel.Info, message);
}
/// <summary>
/// 將Trace資訊紀錄到Win2000/NT事件日誌中
/// <param name="message">需要紀錄的文件資訊</param>
/// </summary>
public static void WriteTrace(String message)
{
WriteLog(TraceLevel.Verbose, message);
}
/// <summary>
/// 格式化紀錄到事件日誌的文件資訊格式
/// <param name="ex">需要格式化的Exception物件</param>
/// <param name="catchInfo">Exception資訊標題字串.</param>
/// <retvalue>
/// <para>格式後的Exception資訊字串,包括Exception內容和TraceStack.</para>
/// </retvalue>
/// </summary>
public static String FormatException(Exception ex, String catchInfo)
{
StringBuilder strBuilder = new StringBuilder();
if (catchInfo != String.Empty)
{
strBuilder.Append(catchInfo).Append("rn");
}
strBuilder.Append(ex.Message).Append("rn").Append(ex.StackTrace);
return strBuilder.ToString();
}
/// <summary>
/// 實際事件日誌寫入方法
/// <param name="level">要紀錄資訊的級別(error,warning,info,trace).</param>
/// <param name="messageText">要紀錄的文件.</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Exception
}
} //class ApplicationLog
}
/// 格式化紀錄到事件日誌的文件資訊格式
/// <param name="ex">需要格式化的Exception物件</param>
/// <param name="catchInfo">Exception資訊標題字串.</param>
/// <retvalue>
/// <para>格式後的Exception資訊字串,包括Exception內容和TraceStack.</para>
/// </retvalue>
/// </summary>
public static String FormatException(Exception ex, String catchInfo)
{
StringBuilder strBuilder = new StringBuilder();
if (catchInfo != String.Empty)
{
strBuilder.Append(catchInfo).Append("rn");
}
strBuilder.Append(ex.Message).Append("rn").Append(ex.StackTrace);
return strBuilder.ToString();
}
/// <summary>
/// 實際事件日誌寫入方法
/// <param name="level">要紀錄資訊的級別(error,warning,info,trace).</param>
/// <param name="messageText">要紀錄的文件.</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Exception
}
} //class ApplicationLog
}