Question

我收到此错误，虽然还有其他帖子，但我没有得到适当的解决方案来解决我的问题。

调试器指向此语句

 id = Convert.ToInt32(s);

它在开始时工作正常但现在却产生了错误。以下是完整的功能。作为旁注，我在Visual Studio 2013中遵循N层架构。

public List<ATMBO> GetDataFromFile() // get data from file and store it into object and pass to BLL !!!!
{
        List<ATMBO> l = new List<ATMBO>();

        // opening stream !!!
        FileStream f = new FileStream("BankClient.txt", FileMode.Open);
        StreamReader sr = new StreamReader(f);

        if (!File.Exists("BankClient.txt"))
        {
            Console.WriteLine("{0} does not exist.", "BankClient.txt");
        }

        // Start reading from file 
        string record=sr.ReadLine();
        //sr.ReadLine();

        while((record = sr.ReadLine()) != null)
        {
            //record = sr.ReadLine();
            // storing data from file to object!!!! 

            string [] data = record.Split(':');
            //Console.WriteLine(data[0]);
            ATMBO bo = new ATMBO();
            string s = (data[0]);
            int id = 0;

            try
            {
                id = Convert.ToInt32(s);
            }
            catch (FormatException e)
            {
                Console.WriteLine("Input string is not a sequence of digits.");
            }
            catch (OverflowException e)
            {
                Console.WriteLine("The number cannot fit in an Int32.");
            }

            bo.ID1 = id;
            bo.Login = data[1];
            bo.Type = data[2];
            string ss = (data[3]);
            int blnc = Convert.ToInt32(ss);
            bo.Balance = blnc;
            bo.Status = data[4];
            bo.Date = data[5];
            bo.Pin = data[6];
            l.Add(bo);
        }

        sr.Close();
        f.Close();
        return l;
    }

我的BankClient.txt文件的内容：

ID:Name:Type:Balance:Status:Date:Pin
00:Admin:Savings:500:Active:1/11/2014:111
01:Nabeel:Savings:0:Active:1/11/2014:222
02:Asad:Current:600:Active:2/11/2014:333
03:Aqsa:Current:-300:Active:3/11/2014:ABC
04:Umer:Savings:1000:Active:4/11/2014:444            
05:Ali:Savings:1000:Active:4/11/2014:555

Answer 1

您需要在代码中添加一些错误处理，以确保您可以使用实际值，例如

string [] data = record.Split(':');
if(data.length < 7)
    Console.WriteLine("Data doesn't contain what was expected");

更好的是，您可以使用Convert.ToInt32

代替TryParse

int id;
if(!int.TryParse(s, out id))
    Console.WriteLine("Not a valid id");

未处理的异常：输入字符串格式不正确

1 个答案: