新手必須瞭解的ASP.NET語句

 1.//彈出對話框。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.//彈出對話框

 Response.Write(&quot; <script language='javascript'>alert('產品添加成功!')

</script >&quot;);

    3.//刪除文件

 string filename =&quot;20059595157517.jpg&quot;;
pub.util.DeleteFile(HttpContext.Current.Server.MapPath(&quot;../file/&quot;)

+filename);

    4.//綁定下拉列表框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.//標題帶鏈接

 <%# &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; οnclick=/&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.//輸出數據格式化 "{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.//獲取" . "後面的字符

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

+1).ToLower().Trim()

    12. 打開新的窗口並傳送參數:

    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.爲按鈕添加對話框

 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信息’);&quot;);
  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(&quot;onclick&quot;,&quot;window.open(’

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


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(&quot;ondblclick&quot;,

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

&quot;);
}

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(&quot;ondblclick&quot;, &quot;open

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

 16.表格超連接列傳遞參數

<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;數據字段1&quot;)%>’ &amp;

name=’<%# DataBinder.Eval(Container.DataItem, &quot;數據字段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裏


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.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(&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(&quot;UserName&quot;).Expires = 0
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