reading a text file, line by line and put it in 3D array in C#...I got Problem...

Thanks alot for your real kind reply

*facing the problem:

*"the input string is not in correct format"  upon reaching to temp[i * 5 + j] = double.Parse(numbers[j]);

*I changed the code as follows and it worked well.

double[,,] dArray = new double[76,140,150];
double[] temp = new double[76 * 140 * 150];
StringReader sr = new StringReader(filePath);
//string line = null;
string [] lines =File.ReadAllLines(path)

string[] numbers = null;
for (int i = 0; i < lines.Length; i++)
{
    //line = sr.ReadLine();
    numbers = lines[i].Split(' '); // split on space
    for(int j = 0; j < 5; j++)
    {
       temp[i * 5 + j] = double.Parse(numbers[j]);
    }
}  

sr.Close();

int count = 0;

for (int k = 0; k < 149; k++)
{
   for(int j = 0; j < 139; j++)
   {
      for(int i = 0; i < 75; i++)
      {
         dArray[i,j,k] = temp[count];
         count++;
      }
   }
}

temp = null;  

If you're sure that the data doesn't contain anything that can't be parsed as a double and that there are always exactly 5 numbers on each line, then the problem could be caused by the presence of superfluous whitespace at the beginning or end of a line.

Try replacing this line:

 numbers = line.Split(' '); // split on space

with this one:

 numbers = line.Trim().Split(' '); // split on space

I got the error : the input string is not in correct format when reaching to :

 temp[i * 5 + j] = double.Parse(numbers[j]);

I'd be inclined to load all the data into a temporary single dimensional array first and then transfer it to the 3D array. Like this (untested):

double[,,] dArray = new double[76,140,150];
double[] temp = new double[76 * 140 * 150];
StringReader sr = new StringReader(filePath);
string line = null;
string[] numbers = null;
StringReader sr = new StringReader(filePath);

for (int i = 0; i < 319200; i++)
{
    line = sr.ReadLine();
    numbers = line.Split(' '); // split on space
    for(int j = 0; j < 5; j++)
    {
       temp[i * 5 + j] = double.Parse(numbers[j]);
    }
}  

sr.Close();

int count = 0;

for (int k = 0; k < 149; k++)
{
   for(int j = 0; j < 139; j++)
   {
      for(int i = 0; i < 75; i++)
      {
         dArray[i,j,k] = temp[count];
         count++;
      }
   }
}

temp = null;  

In fact at each line ( just in this case I need to Code) there are 5 number at each line and number of lines are319200.

It means I have an array of 76*150*140 cells. The data file is 319200 line but at each line 5 number exists.

Doy ou think we may be able to use arraylist....

My suggested code assumed there would always be 76 doubles on each line. It won't work if there are a variable number of  doubles on each line which your simplified example is suggesting.

Can you confirm that this is the case and whether there is any pattern as to how many numbers will appear on the line, or whether it's more or less random.

The code also assumed that the doubles would be separated by commas but it appears that they're separated by spaces, though that's easily fixed.