index was outside the bounds of the array

[nikz]

An error shows rarely iindex was outside the bounds of the array in line number 160





Line number 160 starts below.

         string s = "";
                if (imgname[pageno - 1, 0] != null)
                {
                    ImageButton1.Visible = true;
                    TextBox1.Visible = true;
                    ImageButton1.ImageUrl = image_url + imgname[pageno - 1, 0];
                    ImageButton1.AlternateText = imgname[pageno - 1, 0];
                    s = "<p><a href=\"http://www.status99.com/home.aspx\" target=\"_blank\"><img src=\" http://status99.com/main/greetings/" + type + "/" + imgname[pageno - 1, 0] + "\" alt=\"\" /> </a><br><a href=\"www.status99.com\"><br /><img src=\"http://www.status99.com/images/arrow.gif\" alt=\"\" /><br />status99.com , V4orkut.info(" + setcategory(type) + ") </a></p>";
                    TextBox1.Text = s;
                    //Literal1.Text = "<a name=\"fb_share\" type=\"box_count\" share_url=\"http://status99.com/main/greetings/" + type + "/" + imgname[pageno - 1, 0] + "\"></a>" +
                    //                       "<script src=\"http://static.ak.fbcdn.net/connect.php/js/FB.Share\" type=\"text/javascript\"></script>";
                    ImgButtonUFB_1.Visible = true;
                    divMessaegUFB_1.Visible = true;
 
         lblDesc1.Text = GetImgDesc(imgname[pageno - 1, 0]); 
 
                }
                if (imgname[pageno - 1, 1] != null)
                {
                    ImageButton2.Visible = true;
                    TextBox2.Visible = true;
                    ImageButton2.ImageUrl = image_url + imgname[pageno - 1, 1];
                    ImageButton2.AlternateText = imgname[pageno - 1, 1];
                    s = "<p><a href=\"http://www.status99.com/home.aspx\" target=\"_blank\"><img src=\" http://status99.com/main/greetings/" + type + "/" + imgname[pageno - 1, 1] + "\" alt=\"\" /> </a><br><a href=\"www.status99.com\"><br /><img src=\"http://www.status99.com/images/arrow.gif\" alt=\"\" /><br />status99.com  V4orkut.info(" + setcategory(type) + ") </a></p>";
                    TextBox2.Text = s;
                    //Literal2.Text = "<a name=\"fb_share\" type=\"box_count\" share_url=\"http://status99.com/main/greetings/" + type + "/" + imgname[pageno - 1, 1] + "\"></a>" +
                    //                       "<script src=\"http://static.ak.fbcdn.net/connect.php/js/FB.Share\" type=\"text/javascript\"></script>";
                    ImgButtonUFB_2.Visible = true;
                    divMessaegUFB_2.Visible = true;
 
          lblDesc2.Text = GetImgDesc(imgname[pageno - 1, 1]); 
 
                }
                if (imgname[pageno - 1, 2] != null)
                {
                    ImageButton3.Visible = true;
                    TextBox3.Visible = true;
                    ImageButton3.ImageUrl = image_url + imgname[pageno - 1, 2];
                    ImageButton3.AlternateText = imgname[pageno - 1, 2];
                    s = "<p><a href=\"http://www.status99.com/home.aspx\" target=\"_blank\"><img src=\" http://status99.com/main/greetings/" + type + "/" + imgname[pageno - 1, 2] + "\" alt=\"\" /> </a><br><a href=\"www.status99.com\"><br /><img src=\"http://www.status99.com/images/arrow.gif\" alt=\"\" /><br />status99.com V4orkut.info (" + setcategory(type) + ") </a></p>";
                    TextBox3.Text = s;
                    //Literal3.Text = "<a name=\"fb_share\" type=\"box_count\" share_url=\"http://status99.com/main/greetings/" + type + "/" + imgname[pageno - 1, 2] + "\"></a>" +
                    //                       "<script src=\"http://static.ak.fbcdn.net/connect.php/js/FB.Share\" type=\"text/javascript\"></script>";
                    ImgButtonUFB_3.Visible = true;
                    divMessaegUFB_3.Visible = true;
 
        lblDesc3.Text = GetImgDesc(imgname[pageno - 1, 2]); 
 
                }
                if (imgname[pageno - 1, 3] != null)
                {
                    ImageButton4.Visible = true;
                    TextBox4.Visible = true;
                    ImageButton4.ImageUrl = image_url + imgname[pageno - 1, 3];
                    ImageButton4.AlternateText = imgname[pageno - 1, 3];
                    s = "<p><a href=\"http://www.status99.com/home.aspx\" target=\"_blank\"><img src=\" http://status99.com/main/greetings/" + type + "/" + imgname[pageno - 1, 3] + "\" alt=\"\" /> </a><br><a href=\"www.status99.com\"><br /><img src=\"http://www.status99.com/images/arrow.gif\" alt=\"\" /><br />status99.com V4orkut.info (" + setcategory(type) + ") </a></p>";
                    TextBox4.Text = s;
                    //Literal4.Text = "<a name=\"fb_share\" type=\"box_count\" share_url=\"http://status99.com/main/greetings/" + type + "/" + imgname[pageno - 1, 3] + "\"></a>" +
                    //                       "<script src=\"http://static.ak.fbcdn.net/connect.php/js/FB.Share\" type=\"text/javascript\"></script>";
 
                    ImgButtonUFB_4.Visible = true;
                    divMessaegUFB_4.Visible = true;
         lblDesc4.Text = GetImgDesc(imgname[pageno - 1, 3]); 
                }
                if (imgname[pageno - 1, 4] != null)
                {
                    ImageButton5.Visible = true;
                    TextBox5.Visible = true;
                    ImageButton5.ImageUrl = image_url + imgname[pageno - 1, 4];
                    ImageButton5.AlternateText = imgname[pageno - 1, 4];
                    s = "<p><a href=\"http://www.status99.com/home.aspx\" target=\"_blank\"><img src=\" http://status99.com/main/greetings/" + type + "/" + imgname[pageno - 1, 4] + "\" alt=\"\" /> </a><br><a href=\"www.status99.com\"><br /><img src=\"http://www.status99.com/images/arrow.gif\" alt=\"\" /><br />status99.com (" + setcategory(type) + ") </a></p>";
                    TextBox5.Text = s;
                    //Literal5.Text = "<a name=\"fb_share\" type=\"box_count\" share_url=\"http://status99.com/main/greetings/" + type + "/" + imgname[pageno - 1, 4] + "\"></a>" +
                    //                       "<script src=\"http://static.ak.fbcdn.net/connect.php/js/FB.Share\" type=\"text/javascript\"></script>";
                    ImgButtonUFB_5.Visible = true;
                    divMessaegUFB_5.Visible = true;
 
         lblDesc5.Text = GetImgDesc(imgname[pageno - 1, 4]); 
                }
 
 
                pages = imgname.Length / 5;
                int rem = pageno % 8;
                int x = 1;
                if (pageno >= 1 && pageno <= 8)
                {
                    x = 1;
                }
                else
                {
                    if (rem == 0)
                    {
                        x = (pageno - 8) + 1;
                    }
                    else
                    {
                        x = pageno - (rem - 1);
                    }
                }

[Samuel Jones]

A simple yet commonly overlooked solution to this is your pageno variable.

This line:

if (imgname[pageno - 1, 0] != null)

will throw the exception when pageno is 0 or less.

This is because the exception is thrown even before the program checks to see if the reference exists or not.

To rectify the issue, change this line to:

if (pageno > 0 && imgname[pageno - 1, 0] != null)

this will be false when pageno is 0 or less and when the imgname reference is null.

if pageno is not >0, it won't check the imgname reference and return false.


P.S. Before you make posts in the future, please wrap your code in CODE tags, its a lot neater and easier to find problems.