我如何排序在C＃中的二维数组？ [英] How do I sort a two-dimensional array in C#?

问题描述

我有一个二维数组（串），这使我的数据表（行和列）。我想排序这个数组按任何列。我试图找到在C＃这样的算法，但都没有成功。

I have a two-dimensional array (of Strings) which make up my data table (of rows and columns). I want to sort this array by any column. I tried to find an algorithm for doing this in C#, but have not been successful.

任何帮助是AP preciated。

Any help is appreciated.

推荐答案

装入二维字符串数组到一个实际的数据表（System.Data.DataTable），然后使用DataTable对象的Select（）方法来生成一个分类DataRow对象的数组（或使用类似的效果一个DataView）。

Load your two-dimensional string array into an actual DataTable (System.Data.DataTable), and then use the DataTable object's Select() method to generate a sorted array of DataRow objects (or use a DataView for a similar effect).

// assumes stringdata[row, col] is your 2D string array
DataTable dt = new DataTable();
// assumes first row contains column names:
for (int col = 0; col < stringdata.GetLength(1); col++)
{
    dt.Columns.Add(stringdata[0, col]);
}
// load data from string array to data table:
for (rowindex = 1; rowindex < stringdata.GetLength(0); rowindex++)
{
    DataRow row = dt.NewRow();
    for (int col = 0; col < stringdata.GetLength(1); col++)
    {
        row[col] = stringdata[rowindex, col];
    }
    dt.Rows.Add(row);
}
// sort by third column:
DataRow[] sortedrows = dt.Select("", "3");
// sort by column name, descending:
sortedrows = dt.Select("", "COLUMN3 DESC");

您也可以编写自己的方法来进行排序二维数组。这两种方法都将是有益的学习经验，但DataTable的做法将让你开始学习处理在C＃应用程序的数据表的更好的方法。

You could also write your own method to sort a two-dimensional array. Both approaches would be useful learning experiences, but the DataTable approach would get you started on learning a better way of handling tables of data in a C# application.

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