asp.net在動態(tài)網(wǎng)頁中的使用技巧

1.為按鈕添加確認對話框

Button.Attributes.Add(" confirm('確認?')");

Button.Attributes.Add("onclick","if(confirm('確定?')){return true;}else{return false;}")

2.表格超連接列傳遞參數(shù)

<asp:HyperLinkColumn Target="_blank" headertext="ID號" DataTextField="id" NavigateUrl="aaa.aspx?id='<%# DataBinder.Eval(Container.DataItem, "數(shù)據(jù)字段1")%>'&name='<%# DataBinder.Eval(Container.DataItem, "數(shù)據(jù)字段2")%>'/>

3.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';");

}

4.清空Cookie

Cookie.Expires=[DateTime];

Response.Cookies("UserName").Expires = 0;

5.Panel 橫向滾動，縱向自動擴展

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

6.數(shù)字格式化

<%#Container.DataItem("price")%> 結(jié)果:500.0000格式化:500.00

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

int i=123456;

string s=i.ToString("###,###.00");

7.日期格式化

<%# DataBinder.Eval(Container.DataItem,"Date")%> 結(jié)果:2004-8-11 19:44:28 格式化:2004-8-11

<%# DataBinder.Eval(Container.DataItem,"Date","{0:yyyy-M-d}")%>

8.時間格式化

string aa=DateTime.Now.ToString("yyyy年MM月dd日");

當(dāng)前年月日時分秒 currentTime=System.DateTime.Now;

當(dāng)前年 int 年= DateTime.Now.Year;

當(dāng)前毫秒 int 毫秒= DateTime.Now.Millisecond;

9.自定義分頁代碼

public static int pageCount; //總頁面數(shù)

public static int curPageIndex=1; //當(dāng)前頁面 　　

if(ccDataGrid.CurrentPageIndex<(ccDataGrid.PageCount - 1))

{//下一頁

　 ccDataGrid.CurrentPageIndex += 1;

　 curPageIndex+=1;

}

bind(); // ccDataGrid數(shù)據(jù)綁定函數(shù)

if(ccDataGrid.CurrentPageIndex>0)

{ //上一頁

　 ccDataGrid.CurrentPageIndex += 1;

　 curPageIndex-=1;

}

bind(); // ccDataGrid數(shù)據(jù)綁定函數(shù)

int a=int.Parse(JumpPage.Value.Trim());//JumpPage.Value.Trim()為跳轉(zhuǎn)值

if(a<DataGrid1.PageCount)

{ //直接頁面跳轉(zhuǎn)

　 this.ccDataGrid.CurrentPageIndex=a;

}

bind(); // ccDataGrid數(shù)據(jù)綁定函數(shù)

10.變量.ToString()

字符型轉(zhuǎn)換 轉(zhuǎn)為字符串

12345.ToString("n"); //生成 12,345.00

12345.ToString("C"); //生成 ￥12,345.00

12345.ToString("e"); //生成 1.234500e+004

12345.ToString("f4"); //生成 12345.0000

12345.ToString("x"); //生成 3039 (16進制)

12345.ToString("p"); //生成 1,234,500.00%

11.客戶端驗證控件

//驗證空值

<asp:requiredfieldvalidator id="valUsername" runat="server" controltovalidate="txtUsername" display="None" errormessage="請輸入用戶名 !!"></asp:requiredfieldvalidator>

//驗證網(wǎng)址

<asp:regularexpressionvalidator id="rev" runat="server" ErrorMessage="公司網(wǎng)址不合法[要有http://] ！" Display="None" ControlToValidate="txtCPWebsite" ValidationExpression="http://([\w-]+\.)+[\w-]+(/[\w- ./?%&amp;=]*)?"></asp:regularexpressionvalidator>

//驗證郵箱

<asp:RequiredFieldValidator id="rfv" runat="server" ControlToValidate="txtCPEmail" Display="None" ErrorMessage="請輸入電子郵箱 !!"></asp:RequiredFieldValidator>

//驗證郵編

<asp:regularexpressionvalidator id="rev5" runat="server" ErrorMessage="郵政編碼不合法 ！" Display="None" ControlToValidate="txtCPPostCode" ValidationExpression="\d{6}"></asp:regularexpressionvalidator>

//顯示錯誤信息

<asp:validationsummary id="vs" runat="server" ShowSummary="False" ShowMessageBox="True"></asp:validationsummary>

12.DataBinding綁定表達式

以該oil paintings網(wǎng)站案例來說，它的產(chǎn)品頁面都調(diào)用了DataBinding綁定表達式

1) 普通的綁定表達式

<%# DataBinder.Eval(Container.DataItem, "ContactName") %>

2) 文本+綁定表達式

<asp:Label id=lblDate runat="server" Text='<%# "[" + DataBinder.Eval(Container, "DataItem.NewsCreatedate") + "]" %>' ForeColor="Red"></asp:Label>

3) 同時帶有顯示格式的綁定表達式

<%# DataBinder.Eval(Container,"DataItem.USActiveDate","{0:yyyy-MM-dd}") %>

4) 結(jié)合綁定表達式和模態(tài)框

<A href='<%# ShowModalWin(Convert.ToString(DataBinder.Eval(Container.DataItem, "PictureImage")),Convert.ToString(DataBinder.Eval(Container.DataItem, "DetailID")),Convert.ToString(DataBinder.Eval(Container.DataItem, "PictureID")))%>'>

其中：后臺代碼文件中ShowModalWin()方法的定義如下：

protected string ShowModalWin(string PictureImage,string DetailID,string PictureID)

{

return " window.showModalDialog(\"Customers/ShowPictureInfo.aspx?pid="+PictureImage+"&did="+DetailID+"&id="+PictureID+"\",\"\",\"dialogHeight:320px;dialogWidth:480px;center:yes;help:no;status:no;scroll:no\");";

}

或者將參數(shù)提取出來單獨定義成一變量：

const string WINDOWPARAMSTRING="dialogWidth:540px;dialogHeight:420px;help:0;status:0;resizeable:1;scroll:no";

Page.RegisterStartupScript("functionscript","<script language='javascript'>window.showModalDialog('EditUserService.aspx?URID="+iURID+"','','"+WINDOWPARAMSTRING+"')</script>");

13.html字符轉(zhuǎn)換的兩個函數(shù)

public string Encode(string str)

{

str=str.Replace("&","&amp;");

str=str.Replace("'","''");

str=str.Replace("\"","&quot;");

str=str.Replace(" ","&nbsp;");

str=str.Replace("<","&lt;");

str=str.Replace(">","&gt;");

str=str.Replace("\n","<br>");

return str;

}

public string Decode(string str)

{

str=str.Replace("\n","<br>");

str=str.Replace("&gt;",">");

str=str.Replace("&lt;","<");

str=str.Replace("&nbsp;"," ");

str=str.Replace("&quot;","\"");

return str;

}