unassigned-variable

问题 I am developing this website in ASP.NET and using C#. I am Getting the error that :Use of unassigned variable usn. The database is also not empty. My code is: protected void Button1_Click(object sender, EventArgs e) { SqlConnection cn = new SqlConnection(); SqlCommand cm = new SqlCommand(); SqlDataReader dr; cn.ConnectionString = @"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\Vijaylaxmi\Desktop\TrainReserveold\App_Data\Database.mdf;Integrated Security=True;User Instance=True"; cn.Open()

问题 I'm trying below code. It gives me a warning "Use of unassigned local variable 'hak' ". I guess I'm missing something here. I want it to display " 3 defa yanlış giriş yaptınız. Müşteri hizmetleri temsilcisiyle görüşünüz. İyi günler dileriz. " when local variable "hak" equals to "0". But it always display " Hatalı Giriş Yaptınız. Lütfen tekrar deneyiniz. 2 hakkınız kalmıştır. " Console.Write("Seçmek istediğiniz 'Kullanıcı Adı'nı belirtiniz: "); string kullanici_adi = Console.ReadLine();

问题 i am making a program to add a list numbers separated by a comma ( , ) in a text box. example: 1,12,5,23 in my total += num; i keep getting a use of unassigned local variable with total; using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private

问题 I am reading connection strings from my App.config file and for that i have following code. try { string[] dbnames; int counter = 0; foreach (ConnectionStringSettings connSettings in ConfigurationManager.ConnectionStrings) { dbnames[counter] = connSettings.Name; counter++; } return dbnames; } catch { throw; } this code giving me error use of unassigned local variable for dbnames. i will have multiple connection strings in my App.config. They can be none,1,2 and so on. Depending on the needs.

问题 When could i in this example be unassigned? int i; try { i = 2; } catch { i = 3; } finally { string a = i.ToString(); } 回答1: You could get a ThreadAbortException before i=2 runs, for example. Anyway, the C# compiler is not exceptionally smart, so it's easy to fool with contrived examples like the above one. It doesn't have to recognize every situation, and if it's not sure it is assigned, even if you are sure, it will complain. EDIT: I was a bit quick on my first assumption. So to refine it,

问题 I'm doing the following block of code and the compiler is complaining about unassigned local variables and could use some help identifying what's up. while (rsData.Read()) { if (rsData["TYPE"] != DBNull.Value) strType = rsData["TYPE"].ToString().Trim(); if (strType == "01") { if (rsData["Text"] != DBNull.Value) strwho = rsData["Text"].ToString(); if ((strwho.Length < 10 || (strwho.IndexOf("NULL") > 1))) strwho = ""; } else if (strType == "07") { if (rsData["Text"] != DBNull.Value) strmetades

问题 I have function called firstRun() , inside of it I have two defined booleans filesDeleted and dirsDeleted . Also inside in function I have if (filesDeleted == true && dirsDeleted == true) { When I try to debug application I get error - Use of unassigned local variable 'filesDeleted' and Use of unassigned local variable 'dirsDeleted' tried a lot of different solutions, did not work at all. Here's the code: private void firstRun(bool forceDelete) { string Path = Path.Combine(Environment

问题 I am getting an error use unassigned local variable 'multidimension' from below code. I am trying to put the data returned back from the text file in a multidimensional array by splitting them and put each row in in the array private void button1_Click_1(object sender, EventArgs e) { string[,] Lines; //string[][] StringArray = null; //to get the browsed file and get sure it is not curropted try { DialogResult result = openFileDialog1.ShowDialog(); if (result == DialogResult.OK) { using

问题 Again i run into an error i don't mean to bug anyone but I'm getting an error on this code: using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Input_Program { class Program { private static void Main() { char Y; char N; Console.WriteLine("Welcome to my bool program!"); Console.WriteLine("Input a NON capital y or n when told to."); if(Y == 'y') { Console.WriteLine("Thank you,Please wait....."); } } } } Thanks for you answers! 回答1: Your variable char

问题 having this code, I don't understand why if assigning a variable in a finally block doesn't understand it will ALWAYS be assigned. I think I missing a valid option where currency won't be assigned. If you know, will be great to understand why. much appreciate it! Thanks! CurrencyVO currency; try { if (idConnection.HasValue && idConnection != 0) { currencyConnection = client.GetConnection(idConnection.Value); model.Connection = currencyConnection; } else { int providerUserKey = (int)Models