怎么把c# 读取文件内容存放到int数组 array.txt里面

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Collections;
using System.IO;
using System.Text;
///

/// Summary description for ReadFile
///

public class ReadFile
{
public ReadFile()
{
//
// TODO: Add constructor logic here
//
}
public int[,] ReadFileToArray()
{
int[,] iret = null;
ArrayList alNumLine = getFileContent();
string[] strLineArr = null;
if (alNumLine.Count > 0)
{
strLineArr = Convert.ToString(alNumLine[0]).Trim(',').Split(',');
iret = new int[alNumLine.Count, strLineArr.Length];
for (int i = 0; i {
strLineArr = Convert.ToString(alNumLine[i]).Trim(',').Split(',');
for (int j = 0; j {
iret[i, j] = Convert.ToInt32(strLineArr[j]);
}
}
}
return iret;
}
public ArrayList getFileContent()
{
ArrayList alRet = new ArrayList();
string strFilePath = HttpContext.Current.Server.MapPath("~") + "/array.txt";
if (!File.Exists(strFilePath))
{
HttpContext.Current.Response.Write("文件[" + strFilePath + "]不存在。");
return alRet;
}
try
{
//读出一行文本，并临时存放在ArrayList中
StreamReader sr = new StreamReader(strFilePath, Encoding.GetEncoding("gb2312"));
string l;
while ((l = sr.ReadLine()) != null)
{
if (!string.IsNullOrEmpty(l.Trim()))
alRet.Add(l.Trim());
}
sr.Close();
}
catch (IOException ex)
{
HttpContext.Current.Response.Write("读文件出错！请检查文件是否正确。");
HttpContext.Current.Response.Write(ex.ToString());
}
return alRet;
}
}