data binding - How to Bind a TextBox in DataGrid to a List in Wpf? -


am working on new wpf project , struggling binding textbox in datagrid list of objects in wpf. can me fix?

this code (simplified version) generate datagrid rows binding orders object. user can changed order items , should bind underline object. once user clicked read orders button displaying changes in textblock. issue: changes in textbox not updating orders object.

observablecollection<stxordr> orders = new observablecollection<stxordr>();  private void window_initialized(object sender, eventargs e) {     orders.add(new stxordr() { id = 1, desc = "order-#1", item1 = "11", item2 = "12", item3 = "13" });     orders.add(new stxordr() { id = 2, desc = "order-#2", item1 = "21", item2 = "22", item3 = "23" });     orders.add(new stxordr() { id = 3, desc = "order-#3", item1 = "31", item2 = "32", item3 = "33" });                             dg2.itemssource = orders; }  private void readupdatedorders(object sender, routedeventargs e) {     txtblk.text = "";     foreach (stxordr odr in orders)     {         txtblk.text += string.format("{0}:   {1} - {2} - {3}\n", odr.desc, odr.item1, odr.item2, odr.item3);     } }

window xml

<datagrid x:name="dg2"  horizontalalignment="left" margin="21,295,0,0" verticalalignment="top" height="230" width="451" autogeneratecolumns="false" itemssource="{binding source=orders}" > <datagrid.columns>     <datagridtextcolumn header="id" binding="{binding id}" />     <datagridtextcolumn header="desc" binding="{binding desc}"   width="80"/>     <datagridtextcolumn header="item 1" binding="{binding item1}"  width="60"/>     <datagridtextcolumn header="item 2" binding="{binding item2}"  width="60"/>     <datagridtemplatecolumn header="item 3" >         <datagridtemplatecolumn.celltemplate>             <datatemplate>                 <textbox text="{binding item3, mode=onewaytosource}" width="60" />                                         </datatemplate>         </datagridtemplatecolumn.celltemplate>     </datagridtemplatecolumn> </datagrid.columns> </datagrid>  <textblock x:name="txtblk" horizontalalignment="left" margin="489,295,0,0" textwrapping="wrap" text="  updated order details:"             verticalalignment="top" height="176" width="408" background="#fffffcbc"/> <button x:name="btn2_copy" content="read orders" horizontalalignment="left" margin="489,476,0,0"          verticalalignment="top" width="94" click="readupdatedorders"/>

screenshot of ui window

i think things looks correct. make sure orders.cs implements inotifypropertychanged , line of code

<textbox text="{binding item3, mode=onewaytosource}" width="60" />

is updated mode = twoway , updatesourcetrigger = propertychanged. change to

<textbox text="{binding item3, mode=twoway, updatesourcetrigger=propertychanged}" width="60" />

Comments

Post a Comment

Popular posts from this blog

Is there a better way to structure post methods in Class Based Views -

i'm using class based views in django , never specify url in ajax calls , omit action parameter in form because know these requests go through post method of class based view. notice view - profile page make many requests depending on user updating on page - post method become convoluted , if/else mess example: def post(self, request, *args, **kwargs): # handle user changing available date if request.post.get('availabledate') != none: self.updateavailabledate(request) return jsonresponse({'result':'success'}) if request.post.get('newprojectname') != none: creative_user = creativeuserprofile.objects.get(id = request.user.id) project = project.create_project(creative_user, request.post['newprojectname']) project.save() return jsonresponse({'projectid': project.id }) if request.post.get('projectimage') != none , request.files['file']: proj...
Read more

performance - Why is XCHG reg, reg a 3 micro-op instruction on modern Intel architectures? -

i'm doing micro-optimization on performance critical part of code , came across sequence of instructions (in at&t syntax): add %rax, %rbx mov %rdx, %rax mov %rbx, %rdx i thought had use case xchg allow me shave instruction , write: add %rbx, %rax xchg %rax, %rdx however, dimay found agner fog's instruction tables , xchg 3 micro-op instruction 2 cycle latency on sandy bridge, ivy bridge, broadwell, haswell , skylake. 3 whole micro-ops , 2 cycles of latency! 3 micro-ops throws off 4-1-1-1 cadence , 2 cycle latency makes worse original in best case since last 2 instructions in original might execute in parallel. now... cpu might breaking instruction micro-ops equivalent to: mov %rax, %tmp mov %rdx, %rax mov %tmp, %rdx where tmp anonymous internal register , suppose last 2 micro-ops run in parallel latency 2 cycles. given register renaming occurs on these micro-architectures, though, doesn't make sense me done way. why wouldn't register renamer ...
Read more

c# - Asp.net web api : redirect unauthorized requst to forbidden page -

im trying redirect unauthorized request forbidden page instead i'm getting forbidden page in response body , how can fix ? here's startup class : app.createperowincontext(storecontext.create); app.createperowincontext<applicationusermanager>(applicationusermanager.create); app.createperowincontext<applicationsigninmanager>(applicationsigninmanager.create); app.usecookieauthentication(new cookieauthenticationoptions { authenticationtype = defaultauthenticationtypes.applicationcookie, expiretimespan = timespan.fromdays(30), }); app.useexternalsignincookie(defaultauthenticationtypes.externalcookie); app.usetwofactorsignincookie(defaultauthenticationtypes.twofactorcookie, timespan.fromminutes(5)); app.usetwofactorrememberbrowsercookie(defaultauthenticationtypes.twofactorrememberbrowsercookie); the method im trying reach : [httpget] [authorize(roles = "admin")] public string getcurrentusername() { return userman...
Read more