c# - filling list / Array by loop -


इस सवाल का पहले से ही एक उत्तर है: < / P>

  • 29 जवाब

    मैं जोड़ना चाहता हूँ सूची बॉक्स से सरणी या सूची में चयनित मान और मुझे एक अजीब त्रुटि मिलती है

    यहां मेरा कोड है 

      निजी शून्य बटन 3_Click (ऑब्जेक्ट प्रेषक, EventArgs ई) {सूची & lt ; स्ट्रिंग & gt; _AttName = नई सूची & lt; स्ट्रिंग & gt; (); (Int _i = 0; _i & lt; listBox1.SelectedItems.Count; _i ++) के लिए (यदि (listBox1.SelectedItem! = Null) {- & gt; यहां विफलता - & gt; _AttName.Add (listBox1.SelectedValue.ToString ()); ListBox1.Set चुने गए (सूची बॉक्स 1। चयनित इंडेक्स, गलत); }}}   
     या  
      निजी शून्य बटन 3_Click (ऑब्जेक्ट प्रेषक, EventArgs ई) {string [] _AttName = new string [listBox1.SelectedItems.Count] ; के लिए (int _i = 0; _i & lt; listBox1। चुने गए आइटम। संख्या; _i ++) {यदि (listBox1। चुने गए इटैम! = नल) {_AttName [_i] = listBox1। चुने गए वैल्यू। टॉस्ट्रिंग (); ListBox1.Set चुने गए (सूची बॉक्स 1। चयनित इंडेक्स, गलत); }}}   
     यहां त्रुटि है I छवि विवरण यहाँ दर्ज करें   
     
     
      समस्या:  आपको यह त्रुटि मिल जाएगी क्योंकि  सूची बॉक्स  आपने केवल  DisplayMemeber  को बाध्य किया है लेकिन  ValueMember  नहीं है।  
     इसलिए आपके पास कोई भी  मान नहीं है  सूची बॉक्स  में आइटम से जुड़ा  
      समाधान:  आप प्राप्त करने के लिए  SelectedItem  संपत्ति का उपयोग कर सकते हैं आइटम।  
     इसे बदलें:  
      _AttName.Add (सूची बॉक्स 1। चुने गए Valu.ToString ());   
     इसके साथ:  
      _AttName.Add (सूची बॉक्स 1। चुने गए ITem.ToString ());

Comments

Post a Comment

Popular posts from this blog

wpf - ControlTemplate with changes for every class -

I have the following ControlTemplate that is the same for all my custom controls. & amp; the lift; ControlTemplate x: key = "PssFunctionControlBaseHorizontal" TargetType = "Local: PssFunctionControlBase" & gt; & Lt; Grid & gt; & Lt; Threshold Threshold = "1" & gt; & Lt; Content Control X: Name = "Inner Content" Template = "{Static Resources Inner Contentbase Horizontal}" /> & Lt; / Border & gt; & Lt; Control x: name = "PART_ResizeDecorator" visibility = "short" template = "{static resource resize deccurratematet}" /> & Lt; / Grid & gt; & Lt; ControlTemplate.Triggers & gt; & Lt; Data Trigger Value = "True" Binding = "{Binding Editing Moded, Relative Soros = {ResolveSource Search Engineer, Instant Type = {x: Type Local: PssViewLayoutControl}}}" & gt; & Lt; Setter target name = "PART_ResizeDecorator" ...
Read more

c - Performance of System() -

After the function in C, for the system (), it affects the hardware counters, so how do you order that The example displayed for the example you are trying to view lets the IM use the display API (PAPI) and the program is a precompiled matrix multiplication application. PAPI_start_counters (); System ("./matmul"); PAPI_read_counters (); // Print the values ​​PAPI_stop_counters (); I'm clearly missing a bit, but I'm trying to figure out what it is possible to say, counter receiving a program im running Is through use. With my tests I will get wild numbers like below, they are clearly wrong, just want to find out why total bicycle =========== 140733358872510 instructions complete =========== 4203968 Floating Point Instructions =========== Floating Point Operations =========== 4,196,867 Weight ======= ==== 140733358872804 store ======= ==== 4204037 branches taken =========== 15774436 System () Normally it is a very slow function, on Linux, it is ...
Read more

c++ - 'std::string' has no member named 'get' list[i]=user.get; -

I get this error in my code and I know why it is but now I want to fix it and get it What do I want to achieve? List [i] = user.get; & Lt; & Lt; This line of code is trying to insert a string into four arrays, how can I convert the string, while still being able to keep user.length () and getline, I can see how big my dynamic array Should be # include & lt; Iostream & gt; # Include & lt; Cstring & gt; using namespace std; Int main () {char * list; String user; Int counter [26]; Int data; The court's & lt; & Lt; "Enter a line of text (all lowercase)" & lt; & Lt; Endl; // CIN & gt; & Gt; the user; Gateline (pin, user); //cin.get(user); The court's & lt; & Lt; User.length () & lt; & Lt; Endl; List = new four [user.length ()]; For (int i = 0; i & lt; user.length (); i ++) {list [i] = user.get; } Cout & lt; & Lt; The list [0] is referred to as & lt; & Lt; Endl; / * Character alphabet...
Read more