This article is mainly for jquery to obtain control value of the three methods for a detailed summary of the introduction, the need for friends can come to the reference, I hope to help you.
A jquery method of obtaining server control values since the ASP.net Web page is running, the server control will randomly generate the client id,jquery fetch time is not very good operation, Google, the summary has the following 3 ways: Server control code: <asp: TextBox id= "Txtuserid" runat= "Server" ></asp:TextBox> 1. $ ("#<%=txtuserid.clientid%>"). Val (); 2. $ ("Input[id*=txtuserid]"). Val (); 3. $ ("*[id$=txtuserid]"). Val (); Two jquery gets control value method Value: $ ("") is a jquery object, not a DOM element value is a property of DOM element jquery corresponds to Val val (): Get The current value of the first matching element. Val (val): Sets the value of each matching element. So, the code should write: Value: val = $ ("#id") [0].value; Assignment: $ ("#id") [0].value = "New value"; or $ ("#id"). Val ("new value"); or This can also be: val = $ ("#id"). attr ("value"); Gets the value of a set of radio selected items var item = $ (' input[@name =items][@checked] '). Val (); Gets the text of the Select selected item var item = $ ("select[@name =items] option[@selected]"). Text (); The second element of the Select Drop-down box is the currently selected value $ (' #select_id ') [0].selectedindex = 1; The second element of the radio Radio Group is the currently selected value $ (' input[@name =items] '). Get (1). checked = true; Get value: text box, text area: $ ("#txt"). attr ("value"); multiple-selection box checkbox:$ ("#checkbox_id"). attr ("VAlue "); Radio: $ (" input[@type =radio][@checked] "). Val (); Dropdown box Select: $ (' #sel '). Val (); Control form elements: text box, text area: $ ("#txt"). attr ("Value", "");/empty contents $ ("#txt"). attr ("value", ' 11 ');/fill content Multiple-selection box checkbox: $ ( "#chk1"). attr ("Checked", "")//Do not tick $ ("#chk2"). attr ("Checked", true);/tick if ($ ("#chk1"). attr (' checked ') ==undefined) To determine if a check has been made Radio Group Radio: $ ("input[@type =radio]"). attr ("Checked", ' 2 ');//Set value=2 item to the current selected Drop-down box select: $ ("#sel"). attr ("Value", '-sel3 ');//Set VALUE=-SEL3 item is the current check $ ("<option value= ' 1 ' >1111</option><option value= ' 2 ') >2222</option> "). Appendto (" #sel ")//Add drop-down box option $ (" #sel "). Empty ()/clear dropdown box Three jquery Get Control DropDownList value method code as follows: <script type= "Text/javascript" > & Nbsp;function Bbok () { &NB Sp var a = $ ("#ddlGuo option:selected"). Val (); var B = $ ("#ddlGuo option:selected"). Text (); $ ("#txttext"). attr ("value", b); $ ("#txtval"). attr ("value", a);  , </script> <html> &NB Sp <asp:dropdownlist id= "Ddlguo" runat= "server" > <asp:listitem Sel Ected= "True" value= "001" > Beijing </asp:ListItem> <asp:listitem value= " > Nanjing </asp:ListItem> <asp:listitem value= "313" > Suzhou </asp: listitem> </asp:DropDownList> <as P:textbox id= "txtval" runat= "server" ></asp:TextBox> <asp:textbox id= "Txttext" runat= "Server" ></asp:TextBox> &NBSp <br/> <asp:button id= "Button1" runat = "Server" text= Click Select "onclientclick=" Bbok (); "/> </html> Start building with 50+ products and up to 12 months usage for Elastic Compute Service
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