i've create control derivates textbox. on class added call javascript code that, when content of text changes, adds attribute called "post" value "true" control. wish collect value.
so far have this:
asp
<%@ page language="c#" autoeventwireup="true" codebehind="default.aspx.cs" inherits="cweb.web.ui.usr.defpage" %> <%@ register tagprefix="controls" namespace="cweb.web.controls" assembly="web" %> <html> <head> <script type="text/javascript"> function setpost(element){if(!element.hasattribute('post')){z=document.createattribute('post');z.value='true';element.setattributenode(z);}else{element.setattribute('post','true');}} </script> </head> <body> <controls:textbox runat="server" id="abc" /> </body> </html> codebehind (and textbox derivated class)
using sysweb = global::system.web.ui; using ctrweb = global::cweb.web.controls; namespace cweb.web { internal static class binder { internal const string postablekey = "post"; internal const string auxfieldkey = "_ck"; internal static bool getcheck(string ck) { return (ck != null && ck != "" && (ck == global::cweb.data.fields.boolean.valuetrue || ck.contains("t") || ck.contains("v"))); } private static bool getcheckinput(ctrweb.controls.generic.fieldcontrol control, ref bool found) { if (control == null || control.page == null) { found = false; } else { string value = control.page.request.form[control.clientid + ctrweb.binder.auxfieldkey]; //if it's child null, means it's unchecked. found = (value != null && value != ""); return ((found) ? (value == "1" || value == "on" || value.contains("t")) : false); } return false; } internal static bool getcheck(ctrweb.controls.generic.fieldcontrol control, bool outsideinput, string viewstatekey = ctrweb.binder.checkattribute) { string value = control.page.request.form[control.uniqueid]; //if main control exists it's child shal too. if (value == null || value == "") { return ctrweb.binder.getcheck((string)control.getviewstate()[viewstatekey]); } else if (outsideinput) { bool found = false; return ctrweb.binder.getcheckinput(control, ref found); } else { return ctrweb.binder.getcheck((string)control.getattributes()[viewstatekey]); } } internal static void setcheck(ctrweb.controls.generic.fieldcontrol control, bool outsideinput, string viewstatekey = ctrweb.binder.checkattribute) { bool fvalue = ctrweb.binder.getcheck(control, outsideinput, viewstatekey: viewstatekey); control.getviewstate()[viewstatekey] = ((fvalue) ? "true" : "false"); } } namespace controls { public interface fieldcontrol { string clientid { get; } string uniqueid { get; } sysweb.page page { get; } sysweb.attributecollection getattributes(); sysweb.statebag getviewstate(); } public class textbox : sysweb.webcontrols.textbox, ctrweb.fieldcontrol { public bool postable { { return ctrweb.binder.getcheck(this, false, viewstatekey: ctrweb.binder.postablekey); } set { ctrweb.binder.setcheck(this, false, viewstatekey: ctrweb.binder.postablekey); } } protected override void loadviewstate(object savedstate) { this.baseloadviewstate(savedstate); this.postable = ctrweb.binder.getcheck(this, false, viewstatekey: ctrweb.binder.postablekey); } protected override void oninit(global::system.eventargs e) { if (!this.page.ispostback) { this.attributes.add("onchange", "setpost(this)"); this.attributes.add(mdweb.binder.postablekey, "false"); } base.oninit(e); } } } namespace ui.usr { public class defpage : sysweb.page { protected ctrweb.textbox abc; } } } some codes not copied here because have nothing issue.
in order data posted server, have store in form value.
html elements in entirety aren't posted server. key/value pairs of form elements are. (webforms trying trick you thinking whole page posted server, it's lie.)
add hidden form field page, simple this:
<asp:hidden id="somehiddenfield" /> then in javascript, set value of field:
document.getelementbyid('<%= somehiddenfield.clientid %>').value = 'true'; then when page posts server, 'true' value in hidden field:
somehiddenfield.value 
Comments
Post a Comment