Asp.net常用25條語句

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1.//彈出對話方塊.點擊轉向指定頁面
Response.Write(&quot; <script>window.alert('該會員沒有提交申請,請重新提交!')

</script>&quot;);
Response.Write(&quot; <script>window.location

='http://www.51aspx.com/bizpulic/upmeb.aspx' </script>&quot;);

2.//彈出對話方塊
Response.Write(&quot; <script language='javascript'>alert('產品添加成功!')

</script >&quot;);
3.//刪除檔案
string filename =&quot;20059595157517.jpg&quot;;
pub.util.DeleteFile(HttpContext.Current.Server.MapPath(&quot;../file/&quot;)

+filename);

4.//綁定下拉式清單方塊datalist
System.Data.DataView dv=conn.Exec_ex(&quot;select -1 as code,'請選擇經營模式'

as content from dealin union select code,content from dealin&quot;);
this.dealincode.DataSource=dv;
this.dealincode.DataTextField=&quot;content&quot;;
this.dealincode.DataValueField=&quot;code&quot;;  
this.dealincode.DataBind();
this.dealincode.Items.FindByValue(dv[0][&quot;dealincode&quot;].ToString

()).Selected=true;

5.//時間去秒顯示

<%# System.DateTime.Parse(DataBinder.Eval

(Container.DataItem,&quot;begtime&quot;).ToString()).ToShortDateString()%>

6.//標題帶連結

<%# &quot; <a class=/&quot;12c/&quot; target=/&quot;_blank/&quot;

href=/&quot;http://www.51aspx/CV/_&quot;+DataBinder.Eval

(Container.DataItem,&quot;procode&quot;)+&quot;.html/&quot;>&quot;+

DataBinder.Eval(Container.DataItem,&quot;proname&quot;)+&quot; </a>&quot;%>

7.//修改轉向

<%# &quot; <A href=/&quot;editpushpro.aspx?id=&quot;+DataBinder.Eval

(Container.DataItem,&quot;code&quot;)+&quot;/&quot;>&quot;+&quot;修改

&quot;+&quot; </A>&quot;%>

8.//彈出確定按鈕

<%# &quot; <A id=/&quot;btnDelete/&quot; onclick=/&quot;return confirm('你是否

確定刪除這條記錄嗎?');/&quot; href=/&quot;pushproduct.aspx?

dl=&quot;+DataBinder.Eval(Container.DataItem,&quot;code&quot;)

+&quot;/&quot;>&quot;+&quot;刪除&quot;+&quot; </A>&quot;%>

9.//輸出資料格式化 "{0:F2}" 是格式 F2表示小數點後剩兩位

<%# DataBinder.Eval(Container, &quot;DataItem.PriceMoney&quot;,&quot;{0:F2}

&quot;) %>

10.//提取動態網頁內容

Uri uri = new Uri(&quot;http://www.51aspx.com/&quot;);
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.//擷取" . "後面的字元

i.ToString().Trim().Substring(i.ToString().Trim().LastIndexOf(&quot;.&quot;)

+1).ToLower().Trim()

12. 開啟新的視窗並傳送參數:
  傳送參數:

response.write(&quot;<script>window.open(’*.aspx?

id=&quot;+this.DropDownList1.SelectIndex+&quot;&amp;id1=&quot;+...+&quot;’)<

/script>&quot;)

接收參數:

string a = Request.QueryString(&quot;id&quot;);
string b = Request.QueryString(&quot;id1&quot;);

12.為按鈕添加對話方塊

Button1.Attributes.Add(&quot;onclick&quot;,&quot;return confirm(’確認?’)

&quot;);
button.attributes.add(&quot;onclick&quot;,&quot;if(confirm(’are you sure...?

’)){return true;}else{return false;}&quot;)

13.刪除表格選定記錄

int intEmpID = (int)MyDataGrid.DataKeys[e.Item.ItemIndex];
string deleteCmd = &quot;Delete from Employee where emp_id = &quot; +

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(&quot;onclick&quot;,&quot;return confirm(’

您是否確定要刪除這條資訊’);&quot;);
  break;
  default:
  break;
  }
}

15.點擊表格行連結另一頁

private void grdCustomer_ItemDataBound(object sender,

System.Web.UI.WebControls.DataGridItemEventArgs e)
{
  //點擊表格開啟
  if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType ==

ListItemType.AlternatingItem)
  e.Item.Attributes.Add(&quot;onclick&quot;,&quot;window.open(’

Default.aspx?id=&quot; + e.Item.Cells[0].Text + &quot;’);&quot;);
}

雙擊表格串連到另一頁
  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(&quot;ondblclick&quot;,

&quot;location.href=’../ShippedGrid.aspx?id=&quot; + orderItemID + &quot;’

&quot;);
}

雙擊表格開啟新一頁

if(e.Item.ItemType == ListItemType.Item || e.Item.ItemType ==

ListItemType.AlternatingItem)
{
  string orderItemID =e.item.cells[1].Text;
  e.item.Attributes.Add(&quot;ondblclick&quot;, &quot;open

(’../ShippedGrid.aspx?id=&quot; + orderItemID + &quot;’)&quot;);
}

16.表格超串連列傳遞參數

<asp:HyperLinkColumn Target=&quot;_blank&quot; headertext=&quot;ID號&quot;

DataTextField=&quot;id&quot; NavigateUrl=&quot;aaa.aspx?id=’
  <%# DataBinder.Eval(Container.DataItem, &quot;資料欄位1&quot;)%>’ &amp;

name=’<%# DataBinder.Eval(Container.DataItem, &quot;資料欄位2&quot;)%>’ /


17.表格點擊改變顏色

if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType ==

ListItemType.AlternatingItem)
{
  e.Item.Attributes.Add

(&quot;onclick&quot;,&quot;this.style.backgroundColor=’#99cc00’;
    this.style.color=’buttontext’;this.style.cursor=’default’;&quot;);
}

寫在DataGrid的_ItemDataBound裡

if (e.Item.ItemType == ListItemType.Item ||e.Item.ItemType ==

ListItemType.AlternatingItem)
{
e.Item.Attributes.Add

(&quot;onmouseover&quot;,&quot;this.style.backgroundColor=’#99cc00’;
  this.style.color=’buttontext’;this.style.cursor=’default’;&quot;);
e.Item.Attributes.Add(&quot;onmouseout&quot;,&quot;this.style.backgroundColor=

’’;this.style.color=’’;&quot;);
}

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.擷取錯誤資訊併到指定頁面
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(&quot;MyErrorPage.aspx&quot;);

//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資訊,所以頁面導嚮應該直接在服

務器端執行,這樣就可以在錯誤處理頁面得到出錯資訊並進行相應的處理
20.清空Cookie

Cookie.Expires=[DateTime];
Response.Cookies(&quot;UserName&quot;).Expires = 0

21.自訂異常處理

//自訂異常處理類
using System;
using System.Diagnostics;
namespace MyAppException
{
  /// <summary>
  /// 從系統異常類ApplicationException繼承的應用程式異常處理類。
  /// 自動將異常內容記錄到Windows NT/2000的應用程式記錄檔
  /// </summary>
  public class AppException:System.ApplicationException
  {
  public AppException()
  {
  if (ApplicationConfiguration.EventLogEnabled)LogEvent(&quot;出現一個未知錯誤。&quot;);
  }
  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>
  /// 事件記錄記錄類,提供事件記錄記錄支援
  /// <remarks>
  /// 定義了4個日誌記錄方法 (error, warning, info, trace)
  /// </remarks>
  /// </summary>
  public class ApplicationLog
  {
  /// <summary>
  /// 將錯誤資訊記錄到Win2000/NT事件記錄中
  /// <param name=&quot;message&quot;>需要記錄的文本資訊</param>
  /// </summary>
  public static void WriteError(String message)
  {
  WriteLog(TraceLevel.Error, message);
  }
  /// <summary>
  /// 將警告資訊記錄到Win2000/NT事件記錄中
  /// <param name=&quot;message&quot;>需要記錄的文本資訊</param>
  /// </summary>
  public static void WriteWarning(String message)
  {
  WriteLog(TraceLevel.Warning, message);  
  }
  /// <summary>
  /// 將提示資訊記錄到Win2000/NT事件記錄中
  /// <param name=&quot;message&quot;>需要記錄的文本資訊</param>
  /// </summary>
  public static void WriteInfo(String message)
  {
  WriteLog(TraceLevel.Info, message);
  }
  /// <summary>
  /// 將跟蹤資訊記錄到Win2000/NT事件記錄中
  /// <param name=&quot;message&quot;>需要記錄的文本資訊</param>
  /// </summary>
  public static void WriteTrace(String message)
  {
  WriteLog(TraceLevel.Verbose, message);
  }
  /// <summary>
  /// 格式化記錄到事件記錄的文本資訊格式
  /// <param name=&quot;ex&quot;>需要格式化的異常對象</param>
  /// <param name=&quot;catchInfo&quot;>異常資訊標題字串.</param>
  /// <retvalue>
  /// <para>格式後的異常資訊字串,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(&quot;/r/n&quot;);
  }
  strBuilder.Append(ex.Message).Append(&quot;/r/n&quot;).Append(ex.StackTrace);
  return strBuilder.ToString();
  }
  /// <summary>
  /// 實際事件記錄寫入方法
  /// <param name=&quot;level&quot;>要記錄資訊的層級(error,warning,info,trace).</param>
  /// <param name=&quot;messageText&quot;>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(&quot;Application&quot;, ApplicationConfiguration.EventLogMachineName, ApplicationConfiguration.EventLogSourceName );
  //寫入事件記錄
  eventLog.WriteEntry(messageText, LogEntryType);
  }
  catch {} //忽略任何異常
  }
  } //class ApplicationLog
}

22.Panel 橫向滾動,縱向自動擴充

<asp:panel style=&quot;overflow-x:scroll;overflow-y:auto;&quot;></asp:panel>

23.斷行符號轉換成Tab
(1)

<script language=&quot;javascript&quot; for=&quot;document&quot; event=&quot;onkeydown&quot;>
  if(event.keyCode==13 &amp;&amp; event.srcElement.type!=’button’ &amp;&amp; event.srcElement.type!=’submit’ &amp;&amp;     event.srcElement.type!=’reset’ &amp;&amp; event.srcElement.type!=’’&amp;&amp; event.srcElement.type!=’textarea’);
  event.keyCode=9;
</script>

(2)  //當在有keydown事件的控制項上敲斷行符號時,變為tab

public void Tab(System.Web .UI.WebControls .WebControl webcontrol)
{
webcontrol.Attributes .Add (&quot;onkeydown&quot;, &quot;if(event.keyCode==13) event.keyCode=9&quot;);
}
24.DataGrid超級串連列
DataNavigateUrlField=&quot;欄位名&quot; DataNavigateUrlFormatString=&quot;http://xx/inc/delete.aspx?ID={0}&quot;

25.DataGrid行隨滑鼠變色

private void DGzf_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
  if (e.Item.ItemType!=ListItemType.Header)
  {
  e.Item.Attributes.Add( &quot;onmouseout&quot;,&quot;this.style.backgroundColor=/&quot;&quot;+e.Item.Style[&quot;BACKGROUND-COLOR&quot;]+&quot;/&quot;&quot;);
  e.Item.Attributes.Add( &quot;onmouseover&quot;,&quot;this.style.backgroundColor=/&quot;&quot;+ &quot;#EFF3F7&quot;+&quot;/&quot;&quot;);
  }
}

26.模板列

<ASP:TEMPLATECOLUMN visible=&quot;False&quot; sortexpression=&quot;demo&quot;

headertext=&quot;ID&quot;>
<ITEMTEMPLATE>
<ASP LABEL text=’<%# DataBinder.Eval(Container.DataItem,

&quot;ArticleID&quot;)%>’ runat=&quot;server&quot; width=&quot;80%&quot;

id=&quot;lblColumn&quot; />
</ITEMTEMPLATE>
</ASP:TEMPLATECOLUMN>
<ASP:TEMPLATECOLUMN headertext=&quot;選中&quot;>
<HEADERSTYLE wrap=&quot;False&quot; horiz></HEADERSTYLE>
<ITEMTEMPLATE>
<ASP:CHECKBOX id=&quot;chkExport&quot; runat=&quot;server&quot; />
</ITEMTEMPLATE>
<EDITITEMTEMPLATE>
<ASP:CHECKBOX id=&quot;chkExportON&quot; runat=&quot;server&quot;

enabled=&quot;true&quot; />
</EDITITEMTEMPLATE>
</ASP:TEMPLATECOLUMN>

後台代碼

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(&quot;chkExport&quot;);
  chkExport.Checked = true;
  }
  }
  else
  {
  foreach(DataGridItem oDataGridItem in MyDataGrid.Items)
  {
  chkExport = (CheckBox)oDataGridItem.FindControl(&quot;chkExport&quot;);
  chkExport.Checked = false;
  }
  }
}

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