ASP.NET网站建设基本常用代码[转载]
1.為按鈕添加確認(rèn)對話框
Button.Attributes.Add("onclick","return confirm('確認(rèn)?')");
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(kuò)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(jìn)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- ./?%&=]*)?"></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(dá)式
1) 普通的綁定表達(dá)式
<%# DataBinder.Eval(Container.DataItem, "ContactName") %>
2) 文本+綁定表達(dá)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(dá)式
<%# DataBinder.Eval(Container,"DataItem.USActiveDate","{0:yyyy-MM-dd}") %>
4) 結(jié)合綁定表達(dá)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("&","&");
str=str.Replace("'","''");
str=str.Replace("\"",""");
str=str.Replace(" "," ");
str=str.Replace("<","<");
str=str.Replace(">",">");
str=str.Replace("\n","<br>");
return str;
}
public string Decode(string str)
{
str=str.Replace("\n","<br>");
str=str.Replace(">",">");
str=str.Replace("<","<");
str=str.Replace(" "," ");
str=str.Replace(""","\"");
return str;
}
14.產(chǎn)生62位內(nèi)任意數(shù)字大小寫字母的隨機(jī)數(shù)
private static char[] constant=
{
'0','1','2','3','4','5','6','7','8','9',
'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z',
'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'
};
public static string GenerateRandom(int Length)
{
System.Text.StringBuilder newRandom = new System.Text.StringBuilder(62);
Random rd= new Random();
for(int i=0;i<Length;i++)
{
newRandom.Append(constant[rd.Next(62)]);
}
return newRandom.ToString();
}
//調(diào)用
string str=GenerateRandom(6);//參數(shù)表示需要產(chǎn)生隨機(jī)數(shù)的數(shù)目
15.圖像加入版權(quán)信息
using System.Drawing;
using System.IO;
using System.Drawing.Imaging;
private void AddTextToImg(string fileName,string text)
{
if(!File.Exists(MapPath(fileName)))
{
throw new FileNotFoundException("The file don't exist!");
}
if( text == string.Empty )
{
return;
}
//還需要判斷文件類型是否為圖像類型
System.Drawing.Image image = System.Drawing.Image.FromFile(MapPath(fileName));
Bitmap bitmap = new Bitmap(image,image.Width,image.Height);
Graphics g = Graphics.FromImage(bitmap);
float fontSize = 12.0f; //字體大小
float textWidth = text.Length*fontSize; //文本的長度
//下面定義一個矩形區(qū)域，以后在這個矩形里畫上白底黑字
float rectX = 0;
float rectY = 0;
float rectWidth = text.Length*(fontSize+8);
float rectHeight = fontSize+8;
//聲明矩形域
RectangleF textArea = new RectangleF(rectX,rectY,rectWidth,rectHeight);
Font font = new Font("宋體",fontSize); //定義字體
Brush whiteBrush = new SolidBrush(Color.White); //白筆刷，畫文字用
Brush blackBrush = new SolidBrush(Color.Black); //黑筆刷，畫背景用
g.FillRectangle(blackBrush,rectX,rectY,rectWidth,rectHeight);
g.DrawString(text,font,whiteBrush,textArea);
MemoryStream ms = new MemoryStream( );
//保存為Jpg類型
bitmap.Save(ms,ImageFormat.Jpeg);
//輸出處理后的圖像，這里為了演示方便，我將圖片顯示在頁面中了
Response.Clear();
Response.ContentType = "image/jpeg";
Response.BinaryWrite( ms.ToArray() );
g.Dispose();
bitmap.Dispose();
image.Dispose();
}
//調(diào)用
AddTextToImg("me.jpg","Family.Man");
16.常用正則表達(dá)式集錦
"^\\d+$" //非負(fù)整數(shù)（正整數(shù) + 0）
"^[0-9]*[1-9][0-9]*$" //正整數(shù)
"^((-\\d+)|(0+))$" //非正整數(shù)（負(fù)整數(shù) + 0）
"^-[0-9]*[1-9][0-9]*$" //負(fù)整數(shù)
"^-?\\d+$" //整數(shù)
"^\\d+(\\.\\d+)?$" //非負(fù)浮點數(shù)（正浮點數(shù) + 0）
"^(([0-9]+\\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\\.[0-9]+)|([0-9]*[1-9][0-9]*))$" //正浮點數(shù)
"^((-\\d+(\\.\\d+)?)|(0+(\\.0+)?))$" //非正浮點數(shù)（負(fù)浮點數(shù) + 0）
"^(-(([0-9]+\\.[0-9]*[1-9][0-9]*)|([0-9]*[1-9][0-9]*\\.[0-9]+)|([0-9]*[1-9][0-9]*)))$" //負(fù)浮點數(shù)
"^(-?\\d+)(\\.\\d+)?$" //浮點數(shù)
"^[A-Za-z]+$" //由26個英文字母組成的字符串
"^[A-Z]+$" //由26個英文字母的大寫組成的字符串
"^[a-z]+$" //由26個英文字母的小寫組成的字符串
"^[A-Za-z0-9]+$" //由數(shù)字和26個英文字母組成的字符串
"^\\w+$" //由數(shù)字、26個英文字母或者下劃線組成的字符串
"^[\\w-]+(\\.[\\w-]+)*@[\\w-]+(\\.[\\w-]+)+$" //email地址
"^[a-zA-z]+://(\\w+(-\\w+)*)(\\.(\\w+(-\\w+)*))*(\\?\\S*)?$" //url
17.綁定在DataList中的DropDownList
private void dlistOrder_EditCommand(object source, System.Web.UI.WebControls.DataListCommandEventArgs e)
{
//綁定訂單狀態(tài)
for(int i=0;i<((DropDownList)dlistOrder.Items[e.Item.ItemIndex].FindControl("ddlFlag")).Items.Count;i++)
{
if(((DropDownList)dlistOrder.Items[e.Item.ItemIndex].FindControl("ddlFlag")).Items[i].Value == dv.Table.Rows[0]["OrStatus"].ToString())
{
((DropDownList)dlistOrder.Items[e.Item.ItemIndex].FindControl("ddlFlag")).Items[i].Selected = true;
}
}
}
//另一種綁定方式，綁定送貨方式
DataView shipType = OrderSO.GetShipTypeList();
DropDownList ddlShipType = (DropDownList)dlistOrder.Items[e.Item.ItemIndex].FindControl("ddlShipType");
ddlShipType.DataSource = shipType;
ddlShipType.DataTextField = "StName";
ddlShipType.DataValueField = "StId";
ddlShipType.DataBind();
ddlShipType.SelectedIndex = ddlShipType.Items.IndexOf(ddlShipType.Items.FindByValue(dv.Table.Rows[0]["OrShipType"].ToString()));
18.驗證用戶名必須以字母打頭且不能含有中文
String sUsername = txtUsername.Text.Trim();
if(!Regex.IsMatch(sUsername, "^[A-Za-z].*"))
{
Utility.MessageBox(this,"nameFormatError","用戶名要以字母開頭, 且不要用中文名稱 !!");
return;
}
轉(zhuǎn)載于:https://www.cnblogs.com/jRoger/articles/1833610.html
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