xna 4.0错误从string []转换为int []

Question

好吧我试图从.txt文件加载到一个2d数组的int数组但是它让我感到困惑 “mscorlib.dll中发生了'System.FormatException'类型的未处理异常” 我相信它与循环有关，也许超出界限。但我对c＃很新，所以我很难过。

它打破了“nRow [r] = Convert.ToInt32（row [r]）;”

protected void read_lvl()
    {
        IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication();
        IsolatedStorageFileStream fileStream = myIsolatedStorage.OpenFile("myFile.txt", FileMode.Open, FileAccess.Read);
        using (StreamReader reader = new StreamReader(fileStream))
        {    //Visualize the text data in a TextBlock text

            while (!reader.EndOfStream)
            {
                //for each row
                for (int i = 0; i < rows; i++)
                {
                    //read in the line
                    string myLine = reader.ReadLine();
                    //take out the commas
                    string[] row = myLine.Split(',');

                    //convert to string to ints
                    int[] nRow = new int[row.Length];
                    for(int r=0; r<row.Length;r++){
                        nRow[r] =Convert.ToInt32(row[r]);
                    }

                    //feed back into the array
                    for (int j = 0; j < columns; j++){
                        myreadArray[i, j] = nRow[j];
                    }
                }
            }

        }
    }

Answer 1

如果row [r]可能不是整数，则应使用Int32.TryParse。

http://msdn.microsoft.com/en-US/library/vstudio/f02979c7.aspx

使用

int nb = 0;

if (Int32.TryParse("12", out nb) == false)
{
      Console.WriteLine("Error");
}