如何在数据表中创建组合框列 [英] How to create a combobox column in a datatable

问题描述

我已经为此苦苦挣扎了好几天，而且我把 DataTables 和 dataGridViews 弄混了.

I've been struggling with this for days, and I'm getting DataTables and dataGridViews all mixed up.

我有一个 WinForms 程序，它有一个 DataGridView、dataGridView1 和一个 DataTable，错误.

I have a WinForms program, which has a DataGridView, dataGridView1, and a DataTable, errors.

public static DataTable errors = new DataTable();
dataGridView1.DataSource = errors;

现在，在一个名为 ValidateText 的方法中，我将文本文件中的数据逐行读取到一个数组中，我还在其中定义了错误数据表的列:

Now, further down, in a method called ValidateText, I read data from a text file, line by line, into an array, where I also define the columns for the errors datatable:

 errors.Columns.Add("Account Number");
 errors.Columns.Add("Customer Name");
 errors.Columns.Add("Country");
 errors.Columns.Add("State");
 errors.Columns.Add("Ship-to Country");
 errors.Columns.Add("Ship-to State");

 var lines = File.ReadAllLines(file);

   foreach (string line in lines)
   {.
    . 
    . 
    string []items=line.Split('\t').ToArray();
    errors.Rows.Add(items[0], items[1],...items[5]);

当我运行它时效果很好.问题是，我想让国家"列中有一个组合框，所以当程序运行时，数据显示在 dataGridView1 中，用户将有机会选择一个新的国家，如果他们想要，从国家/地区"列.在程序的更深处，我确实定义了一个创建 DataGridViewComboBoxColumn 的方法

And that works just fine when I run it. the thing is, I want to make the "Country" column have a combo box in it, so when the program is run, and the data is displayed in the dataGridView1, the user will have the opportunity to select a new country, if they want, from the "Countries" column. And further down in the program, I've indeed defined a method that creates a DataGridViewComboBoxColumn

private DataGridViewComboBoxColumn CreateComboBoxColumn()
    {
        DataGridViewComboBoxColumn buildCountries = new DataGridViewComboBoxColumn();
        buildCountries.HeaderText = "List of Countries";
        DataTable dataTable = new DataTable();
        dataTable.Columns.Add("Keys");
        dataTable.Columns.Add("Values");
        KeyValuePair<string, string>[] array = CountryList.ToArray();
        foreach (KeyValuePair<string, string> kvp in array)
        {
            dataTable.Rows.Add(kvp.Key, kvp.Value);
        }
        buildCountries.DataSource = dataTable;
        buildCountries.DisplayMember = "Values";
        buildCountries.ValueMember = "Keys";

        return buildCountries;


    }

我遇到的问题是，如何将我在最后一种方法中创建的组合框放入我在上面创建的国家/地区"列中?我觉得我没有得到 DataGridView 和 DataTable 的东西.您将 DataTable 绑定到 DataGridView，但添加此 DataGridViewComboBoxColumn 似乎很难.

The thing that I am having problems with, is how do I get that combo box that I've created in that last method, into the "Countries" column I've created above? I feel like I'm not getting something with DataGridView and DataTable. You bind a DataTable to a DataGridView, but adding this DataGridViewComboBoxColumn seems to be hard.

谢谢，

阿曼达

推荐答案

这只是我的建议，.NET Framework 已经有一个国家/地区列表.所以你可以使用这个类.我忘了是谁创建了这个代码 :)

this is just my suggestion, the .NET Framework had a already list of countries. so you can use this class. i forgot who created this code :)

public static class CountryEntries
    {
        public static IEnumerable<Country> GetCountries()
        {
            return from ri in
                       from ci in CultureInfo.GetCultures(CultureTypes.SpecificCultures)
                       select new RegionInfo(ci.LCID)
                       orderby ri.DisplayName
                   group ri by ri.TwoLetterISORegionName into g                       
                   select new Country
                   {
                       CountryId = g.Key,
                       Title = g.First().DisplayName
                   };
        }
        public class Country
        {
            public string CountryId { get; set; }
            public string Title { get; set; }
        }
    }

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