Some simple operations on ASP control objects, asp control objects

Some simple operations on ASP control objects, asp control objects

Number of online users Application. lock (); Application ["num"] = (Convert. toInt32 (Application ["num"]) + 1 ). toString (); Application. unLock (); Label1.Text = Application ["num"]. toString (); Session Application passed value Session ["user"] = TextBox1.Text; Response. redirect ("Default2.aspx"); the Server encodes and decodes Response. write (Server. urlEncode (" http://www.abc.com "); Virtual Path to absolute path Server. mapPath () uses cookies to obtain the user name or password Response. cookies ["user"]. value = "zhangsan"; Response. cookies ["pass"]. value = "1234"; String str = Response. cookies ["pass"]. value; Label2.Text = "Write successful! "; Read data Label2.Text = Server. htmlEncode (Request. cookies ["user"]. value); Label1.Text = Server. htmlEncode (Request. cookies ["pass"]. the placeholder: string. format Response. redirect (string. format ("Default2.aspx? Username = {0}, pass = {1} ", TextBox2.Text, TextBox3.Text); accept Request. queryString ["user"]. toString (); dropdownlist control switch (DropDownList1.SelectedItem. text. trim () {case "Fujian": {ListBox1.Items. clear (); ListBox1.Items. add ("Fuzhou"); ListBox1.Items. add ("Xiamen"); ListBox1.Items. add ("Quanzhou"); break;} case "Guangdong": {ListBox1.Items. clear (); ListBox1.Items. add ("Guangzhou"); ListBox1.Items. add ("Shantou"); ListBox1.Items. add ("Zhongshan "); Break ;}} ListItem foreach (ListItem l in ListBox1.Items) {if (l. selected = true) {Label1.Text = l. text ;}} for (int I = 0; I <CheckBoxList1.Items. count; I ++) {if (CheckBoxList1.Items [I]. selected) {Label1.Text + = CheckBoxList1.Items [I]. the Text + "" ;}} MApkongjian control requires three condition radius X. Then, you can click "China Map" to jump to the page. <asp: imageMap ID = "ImageMap1" runat = "server" ImageUrl = "~ /Img/p3.jpg "> <asp: CircleHotSpot Radius =" 15 "X =" 10 "Y =" 10 "/> <asp: circleHotSpot Radius = "100" X = "200" Y = "500"/> <asp: circleHotSpot Radius = "40" X = "40" Y = "90"/> <asp: circleHotSpot Radius = "300" X = "400" Y = "600"/> </asp: ImageMap> Transfer method of the server object and respone Redirect () the difference between the two is that the JSP redirection and URL are not changed. The first address should not be changed. After the Transfer jumps to the page, you can also transmit the value in the page. There are multiple methods to Request the value. queryStrnng () Session Application PreviousPage. findControl TextBox tb1 = (TextBox) PreviousPage. findControl ("TextBox2"); TextBox tb2 = (TextBox) PreviousPage. findControl ("TextBox3"); Label1.Text = tb1.Text; Label2.Text = tb2.Text; the master page uses the stored PROCEDURE to use alter procedure dbo. update_user/* (@ parameter1 int = 5, @ parameter2 datatype OUTPUT) */@ sid int, @ sname varchar (20), @ spassword varchar (12 ), @ sex char (10), @ saddress varbinary (50), @ img varbinary (50) AS/* set nocount on */update tb_user set sname = @ sname, spassword = @ spassword, sex = @ sex, saddress = @ saddress, img = @ img RETURN: the stored procedure is used to update the database value in the background.