使用for循環向圖表控件添加初始化的數組（索引從5開始為null）

Question

我已經初始化了一個二維數組，並從索引5開始包含空值。 我試圖將數組值添加到我的圖表控件。 當我嘗試向Console.WriteLine顯示值時，沒有發生異常，但是當我將其添加到圖表系列時，異常是“索引超出了數組的界限”。 有人可以幫助我嗎？ 是因為圖表控件的柱線有限嗎？

try
{
    //females age range
    string[,] gAge = new string[10, 2];
    gAge[0, 0] = "F.13-17";
    gAge[0, 1] = yf.f1317.ToString();
    gAge[1, 0] = "F.18-24";
    gAge[1, 1] = yf.f1824.ToString();
    gAge[2, 0] = "M.25-34";
    gAge[2, 1] = yf.m2534.ToString();
    gAge[3, 0] = "M.13-17";
    gAge[3, 1] = yf.m1317.ToString();
    gAge[4, 0] = "M.18-24";
    gAge[4, 1] = yf.m1824.ToString();

    for (int i = 0; i < gAge.Length; i++)
    {

        if (gAge[i, 0] == null)
        {
            break;
        }
        else
        {
            Console.WriteLine(gAge[i, 0].ToString());
            string[] seriesArray = { gAge[i, 0].ToString() };
            Series series = this.chart1.Series.Add(seriesArray[i]);
        }

    }
}
catch (Exception ex)
{
    Console.WriteLine(ex.Message);
}

Answer 1

問題在於您正在獲取整個數組的長度，在這種情況下， gAge.Length等於20，這是數組中索引的總數。 它超出了您的第一個數組維度的范圍。 嘗試改用gAge.GetLength(0) 。

Answer 2

 try
        {
            chart1.Series.Clear();
            chart1.Titles.Clear();
            chart1.Visible = true;

            //CODES HERE TO GET THE SELECTED PAGE FROM DROP DOWN LIST

            var fb = new FacebookClient(myToken.Default.token);
            var query = string.Format("SELECT metric, value FROM insights WHERE object_id=132414626916208 AND metric='page_fans_gender_age' AND period = period('lifetime') AND end_time = end_time_date('2013-01-18')");

            dynamic parameters = new ExpandoObject();
            parameters.q = query;
            var data = fb.Get<genderAgeDataII>("fql", parameters);

            genderAge yf = (genderAge)data.data[0].value;

            //females age range
            string[,] gAge = new string[10, 2];
            gAge[0, 0] = "F.13-17";
            gAge[0, 1] = yf.f1317.ToString();
            gAge[1, 0] = "F.18-24";
            gAge[1, 1] = yf.f1824.ToString();
            gAge[2, 0] = "M.25-34";
            gAge[2, 1] = yf.m2534.ToString();
            gAge[3, 0] = "M.13-17";
            gAge[3, 1] = yf.m1317.ToString();
            gAge[4, 0] = "M.18-24";
            gAge[4, 1] = yf.m1824.ToString();

            for (int i = 0; i < gAge.GetLength(0); i++)
            {

                if (gAge[i, 0] == null)
                {
                    break;
                }
                else
                {

                   string[] seriesArray = { gAge[i,0] };

                   // Add series.
                   for (int w = 0; w < seriesArray.Length; w++)
                   {
                       // Add series.
                       Series series = this.chart1.Series.Add(seriesArray[w]);

                       int[] pointsArray = new int[seriesArray.Length];
                       pointsArray[w] = Convert.ToInt32(gAge[i, 1]);
                       series.Points.Add(pointsArray[w]);
                   }


                   Console.WriteLine(gAge[i, 0].ToString());
                }

            }