Multi dimensional array out of bounds

Question

My code is hanging on the line fi_get[1, 4] with an "index out of bounds" error.

The lines var is a string list array and at run time it had well over 600 lines of text in it. I don't know why I can't assign a string value to [1,4] ? It does assign values to [1,0] and [1,1] and [1,2] and [1,3] .

    string[,] fi_get = new string[2, 11];

     if (lines[i].Contains("show fabric-interconnect firmware"))
            {
                fi_get[0, 0] = Regex.Replace(lines[i + 2], @".+Running-Kern-Vers:\s(.+)", "$1");
                fi_get[0, 1] = Regex.Replace(lines[i + 3], @".+Running-Sys-Vers:\s(.+)", "$1");
                fi_get[0, 2] = Regex.Replace(lines[i + 4], @".+Startup-Kern-Vers:\s(.+)", "$1");
                fi_get[0, 3] = Regex.Replace(lines[i + 5], @".+Startup-Sys-Vers:\s(.+)", "$1");
                fi_get[1, 0] = Regex.Replace(lines[i + 7], @".+Running-Kern-Vers:\s(.+)", "$1");
                fi_get[1, 1] = Regex.Replace(lines[i + 8], @".+Running-Sys-Vers:\s(.+)", "$1");
                fi_get[1, 2] = Regex.Replace(lines[i + 9], @".+Startup-Kern-Vers:\s(.+)", "$1");
                fi_get[1, 3] = Regex.Replace(lines[i + 10], @".+Startup-Sys-Vers:\s(.+)", "$1");
            }

            if (lines[i].Contains("show fabric-interconnect inventory expand detail"))
            {
                fi_get[0, 4] = Regex.Replace(lines[i + 2], @".+Product Name:\s(.+)", "$1");
                fi_get[0, 5] = Regex.Replace(lines[i + 3], @".+PID:\s(.+)", "$1");
                fi_get[0, 6] = Regex.Replace(lines[i + 4], @".+Serial (SN):\s(.+)", "$1");
                fi_get[0, 7] = Regex.Replace(lines[i + 7], @".+Description:\s(.+)", "$1");
                fi_get[0, 8] = Regex.Replace(lines[i + 10], @".+Serial (SN):\s(.+)", "$1");
                fi_get[0, 9] = Regex.Replace(lines[i + 13], @".+Product Name:\s(.+)", "$1");
                fi_get[0, 10] = Regex.Replace(lines[i + 14], @".+PID:\s(.+)", "$1");
                fi_get[0, 11] = Regex.Replace(lines[i + 15], @".+Serial (SN):\s(.+)", "$1");
                fi_get[1, 4] = Regex.Replace(lines[i + 29], @".+Product Name:\s(.+)", "$1");
                fi_get[1, 5] = Regex.Replace(lines[i + 30], @".+PID:\s(.+)", "$1");
                fi_get[1, 6] = Regex.Replace(lines[i + 31], @".+Serial (SN):\s(.+)", "$1");
                fi_get[1, 7] = Regex.Replace(lines[i + 34], @".+Description:\s(.+)", "$1");
                fi_get[1, 8] = Regex.Replace(lines[i + 37], @".+Serial (SN):\s(.+)", "$1");
                fi_get[1, 9] = Regex.Replace(lines[i + 40], @".+Product Name:\s(.+)", "$1");
                fi_get[1, 10] = Regex.Replace(lines[i + 41], @".+PID:\s(.+)", "$1");
                fi_get[1, 11] = Regex.Replace(lines[i + 42], @".+Serial (SN):\s(.+)", "$1");
            }

Answer 1

An error I see is on fi_get[0, 11] = Regex.Replace(lines[i + 15] because second index should be between 0 and 10!!
Same error on fi_get[1, 11] = Regex.Replace(lines[i + 42] .

To answer your question

why I can't assign a string value to [1,4]?

Remember that C# arrays are zero based, so if you define fi_get[1, 4] you can assign values from fi_get[0, 0] to fi_get [0, 3] .
If you want to assign to fi_get[1, 4] you should define at least fi_get = new string[2, 5] .

Answer 2

I would bet that it's this expression:

lines[i + 29]

What is the value of i at the time this runs?

i + 29

is probably out of range. It's the only array index out of bounds exception that can be thrown on that line if this code is accurate.