Question

以下是检查2个数组的功能。在数组1中搜索一个值，该值的索引用于检索数组2中相同索引处的值

public void raashiNumberRelations(string rashiValue, string[] raashiArray)
 {
   char[] MobileNum = textBox3.Text.ToCharArray();
        Array.Reverse(MobileNum);
        int rv = Convert.ToInt32(rashiValue);
        string[] ra = raashiArray;
        int pos = 0;
        string combo1 = "";
        string combo2 = "";
        string combo3 = "";

        if (rv == 1)
        {
            pos = Array.IndexOf(ra, 5);
            combo1 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 8);
            combo2 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 11);
            combo3 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            rashiCombination(combo1, combo2, combo3);
        }
        if (rv == 2)
        {
            pos = Array.IndexOf(ra, 4);
            combo1 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 7);
            combo2 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 10);
            combo3 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            rashiCombination(combo1, combo2, combo3);
        }
        if (rv == 3)
        {
            pos = Array.IndexOf(ra, 3);
            combo1 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 9);
            combo2 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 12);
            combo3 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            rashiCombination(combo1, combo2, combo3);
        }
        if (rv == 4)
        {
            pos = Array.IndexOf(ra, 8);
            combo1 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 11);
            combo2 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 2);
            combo3 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            rashiCombination(combo1, combo2, combo3);
        }
        if (rv == 5)
        {
            pos = Array.IndexOf(ra, 7);
            combo1 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 10);
            combo2 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 1);
            combo3 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            rashiCombination(combo1, combo2, combo3);
        }
        if (rv == 6)
        {
            pos = Array.IndexOf(ra, 9);
            combo1 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 12);
            combo2 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 3);
            combo3 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            rashiCombination(combo1, combo2, combo3);
        }
        if (rv == 7)
        {
            pos = Array.IndexOf(ra, 11);
            combo1 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 2);
            combo2 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 5);
            combo3 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            rashiCombination(combo1, combo2, combo3);
        }
        if (rv == 8)
        {
            pos = Array.IndexOf(ra, 10);
            combo1 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 1);
            combo2 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 4);
            combo3 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            rashiCombination(combo1, combo2, combo3);
        }
        if (rv == 9)
        {
            pos = Array.IndexOf(ra, 12);
            combo1 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 3);
            combo2 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 6);
            combo3 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            rashiCombination(combo1, combo2, combo3);
        }
        if (rv == 10)
        {
            pos = Array.IndexOf(ra, 2);
            combo1 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 5);
            combo2 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 8);
            combo3 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            rashiCombination(combo1, combo2, combo3);
        }
        if (rv == 11)
        {
            pos = Array.IndexOf(ra, 1);
            combo1 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 4);
            combo2 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 7);
            combo3 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            rashiCombination(combo1, combo2, combo3);
        }
        if (rv == 12)
        {
            pos = Array.IndexOf(ra, 3);
            combo1 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 6);
            combo2 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            pos = Array.IndexOf(ra, 9);
            combo3 = MobileNum[0].ToString() + MobileNum[pos].ToString();
            rashiCombination(combo1, combo2, combo3);
        }


    }

private void button4_Click(object sender, EventArgs e)
    {

        string[] mobileNum = new string[12];
        string[] raashiRow = new string[12];
        addSrNo();
        addMobileNumber();
        findCombinations();

        string zs = calcIndianRaashi(textBox1.Text);

        string[] data = new string[12];
        string[] CalVal = new string[12];
        int temp = 0;


        for (int i = ZodiacIndian; i <= 12; i++)
        {

            data[temp] = i.ToString();
            CalVal[temp] = GetCalculatedVal(i).ToString();
            temp++;
        }

        for (int i = 1; i < ZodiacIndian; i++)
        {

            data[temp] = i.ToString();
            CalVal[temp] = GetCalculatedVal(i).ToString();
            temp++;

        }

        Array.Reverse(data);
        Array.Reverse(CalVal);

        for (int j = 0; j < 12; j++)                              

        {
            dataGridView1.Rows[1].Cells[j].Value = data[j];
            dataGridView1.Rows.Add();
        }

        for (int j = 0; j < 12; j++)                               
        {
            dataGridView1.Rows[2].Cells[j].Value = CalVal[j];
            dataGridView1.Rows.Add();
        }

        for (int i = 0; i < c.Length; i++)
        {
            mobileNum[i] = c[i].ToString();
        }

        raashiRow = data;
        raashiNumberRelations(data[11], raashiRow);
        displayGrahaEffects(mobileNum);

    }

输出给出一个错误数组超出范围，因为pos的值由于某种原因总是保持-1

Answer 1

如果找不到该项，则函数Array.IndexOf()可能会返回-1。您应始终检查此情况并处理错误，可能会打印您要搜索的项目（以及数组中不存在的项目）。

Answer 2

调用pos = Array.IndexOf（ra，12）时检查raashiArray值的长度;由于您的数组的长度为12，因此它可以具有的最后一个索引是11.放置断点并检查其余的索引。

修改好吧我怎么会错过它。 Array.IndexOf查找字符串的索引，但是您以int格式输入它，因此它无法找到指定的字符串，因此它总是1.在＆＃34;＆＃34;中指定数字。还要确保双位数是否存储为单个字符串。例如

string[] temp = new string[]{ "1", "2", "3", "4", "5" }; int a = Array.IndexOf(temp, "3");

Answer 3

嘿，我自己找到了答案。这是一个非常愚蠢的解决方案。我正在路过：

Array.IndexOf("My Array",value)

该函数将值视为整数。我的数组是一个字符串数组。我只是将它重新编写为：

Array.IndexOf(MyArray, "value") // Note it now thinks of value as string

中提琴有效。

我试图检索数组1中的值的索引并使用该索引来查找数组2中相同索引的值

3 个答案: