C＃如何搜索数组中的索引以找到值

-1

我一直在C＃中徘徊，我目前做得很好，但我试图找出如何在多维数组中搜索索引。我有一个阵列，用于每天制作的产品。这通过询问用户输入（使用输入框）例如显示每周制作的产品。第1周星期一= 10熊，星期三= 20熊。第2周星期二= 30，星期五= 11等。我知道IndexOf，但是这是为了找到给定值的索引。我想搜索索引并查找并显示值。C＃如何搜索数组中的索引以找到值

的代码如下：

class Day 
{ 
    private string monday; 
    private string tuesday; 
    private string wednesday; 
    private string thursday; 
    private string friday; 

    public string Monday 
    { 
     get { return monday; } 
     set { monday = value; } 
    } 
    public string Tuesday 
    { 
     get { return tuesday; } 
     set { tuesday = value; } 
    } 
    public string Wednesday 
    { 
     get { return wednesday; } 
     set { wednesday = value; } 
    } 
    public string Thursday 
    { 
     get { return thursday; } 
     set { thursday = value; } 
    } 
    public string Friday 
    { 
     get { return friday; } 
     set { friday = value; } 
    } 
} 

private void btnSelect_Click(object sender, EventArgs e) 
{ 
    Day[] week = new Day[4]; 
    //Week[0] = new Day(); Ask users for input box value 
    E.g.Monday = Microsoft.VisualBasic.Interaction.InputBox("Enter the amount of products made on Monday for week 1", "Product Amount"),etc 

    //Prints the amounts 
    txtOutput.Text += "The product allocation is as follows:" + "\r\n" + "\r\n"; 
    txtOutput.Text += "      Mon Tue  Wed  Thu  Fri \r\n"; 

    int weeknum = 0; 
    //Iterates through and shows the values for each day of the week. 
    foreach (Day days in week) 
    { 
     weeknum++; 
     if (days != null) 
     { 
      txtOutput.Text += "Week " + weeknum + "   " + days.Monday + "   " + days.Tuesday + "   " + days.Wednesday + "   " + days.Thursday + "   " + days.Friday + "\r\n"; 
     } 
    } 
}

来源

2015-11-20 Shadow Absinthe

我不明白你的问题。（找到索引？），你也没有任何多维数组。 –

你会通过使用Array.GetLowerBound和Array.GetUpperBound方法阵列需要循环。 Array.IndexOf和Array.FindIndex方法不支持多维数组。

例如：

string[,,] data = new string[3,3,3]; 
data.SetValue("foo", 0, 1, 2); 

for (int i = data.GetLowerBound(0); i <= data.GetUpperBound(0); i++) 
    for (int j = data.GetLowerBound(1); j <= data.GetUpperBound(1); j++) 
     for (int k = data.GetLowerBound(2); k <= data.GetUpperBound(2); k++) 
      Console.WriteLine("{0},{1},{2}: {3}", i, j, k, data[i,j,k]); 
You might also find the Array.GetLength method and Array.Rank property useful. I recommend setting up a small multidimensional array and using all these methods and properties to get an idea of how they work.

来源

2015-11-20 06:39:29

有像Array.Find（）多维数组没有内置的功能。

您基本上有两种选择：创建您自己的帮助器方法并在其中实现通用搜索模式，或者生成与多维数组内容相关的域对象列表。我个人倾向于选择后者。

如果你选择写一个辅助方法，它可能看起来是（非常粗略地）是这样的：

//你可以很容易地修改这个代码来处理3D阵列等

public static class ArrayHelper 
{ 
    public static object FindInDimensions(this object[,] target, 
    object searchTerm) 
    { 
    object result = null; 
    var rowLowerLimit = target.GetLowerBound(0); 
    var rowUpperLimit = target.GetUpperBound(0); 

    var colLowerLimit = target.GetLowerBound(1); 
    var colUpperLimit = target.GetUpperBound(1); 

    for (int row = rowLowerLimit; row < rowUpperLimit; row++) 
    { 
     for (int col = colLowerLimit; col < colUpperLimit; col++) 
     { 
      // you could do the search here... 
     } 
    } 

    return result; 
}

}

来源

2015-11-20 06:40:24 Shahid

“我想搜索索引并查找并显示值。”

对不起，我可能不会回答你的问题，但这听起来像是一个完美的词典使用案例。

IDictionary<string, int> database = new Dictionary<string, int> 
{ 
    {"Week1 Monday", 10}, 
    {"Week1 Wednesday", 20} 
}; 

var userinput = "Week1 Monday"; 
int numberOfBears; 
database.TryGetValue(userinput, out numberOfBears); 

//numberOfBears = 10

欲了解更多信息，可以参考http://www.dotnetperls.com/dictionary

来源

2015-11-20 07:07:35 interceptwind

此外，您的示例可以通过使用'TryGetValue'方法而不是'ContainsKey'并返回该项目来改进。在这里看到更多：https://stackoverflow.com/questions/9382681/what-is-more-efficient-dictionary-trygetvalue-or-containskeyitem – bashis

@bashis今天学到了一些东西。谢谢！ :) – interceptwind

C＃如何搜索数组中的索引以找到值

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