使用清单作为DataGridView的数据源 [英] Using a list as a data source for DataGridView

问题描述

我萃取设置名称和它们的各自的值从一个配置文件的成有序字典。该字典包含键和值它们是ICollection的类。我要绑定的数据，并在一个DataGridView显示它。我试图复制字符串数组或显示这些阵列，但是当我运行该程序的列是空白的，它似乎根本没有被绑定。

I've extracted the setting names and their respective values out of a configuration file into an ordered dictionary. The dictionary contains keys and values which are of the ICollection class. I want to bind that data and display it in a DataGridView. I've tried copying the strings to arrays and displaying those arrays, but when I ran the program the columns were blank and it did not seem to be binded at all.

我也试图直接设置在DataGridView源到一个有序的字典集合（键或值），但也没有造成任何我想要的;列仍然空白。然而，第三列是由与列名为长度，并显示在ICollection的条目的长度。但不用说我也不想的长度，我想自己的条目。

I've also attempted to set the DataGridView source directly to one the ordered dictionary collections (keys or values), but that also did not result in anything I wanted; the columns were still blank. However, a third column is made with the column name as "length" and displays the lengths of the entries in the ICollection. But needless to say I do not want the lengths, I want the entries themselves.

下面是code，我使用了这个问题：当窗体的加载，我加载配置文件和私有成员称为m_Settings拥有所有的键 - 值对。然后，我创建一个列表，并分别添加键和值。绑定源设置为数据后，我运行程序和两列我说都是空白。

Here is the code that I am using for this question: Upon the loading of the form, I load the configuration file and a private member called m_Settings has all the key-value pairs. Then I create a list and add the keys and the values separately. After setting the binding source to 'data', I run the program and both columns I added are both blank.

    private void Form4_Load(object sender, EventArgs e)
    {
        loadconfigfile(Properties.Settings.Default.Config);
        List<Object> data = new List<Object>();
        data.Add(m_Settings.Keys);
        data.Add(m_Settings.Values);
        bindingSource1.DataSource = data;
        dataGridView1.DataSource = bindingSource1;
        dataGridView1.Refresh();
    }

任何想法，我怎么能得到有序字典和显示标示为设置和值两列中的条目？我认为，名单是为DataGridViews兼容的数据源，但现在我已经开始猜测自己。

Any ideas as to how I could get the ordered dictionary and display the entries in two columns labelled "Settings" and "Values"? I believe that lists were compatible DataSources for DataGridViews, but now I'm starting to second-guess myself.

任何帮助或方向大大AP preciated！我会很乐意提供，如果需要更多的信息。

Any help or direction is greatly appreciated! I'll be happy to provide more information if needed.

谢谢！

修改

下面是修改code与实施MYSTRUCT类：

Here is the revised code with the implemented myStruct class:

    List<myStruct> list = new List<myStruct>();
    for(int index = 0; index < m_Settings.Count; index++)
    {
        myStruct pair = new myStruct(keys[index], values[index].ToString());
        list.Add(pair);
    }

    public class myStruct
    {
        private string Key { get; set; }
        private string Value { get; set; }

        public myStruct(string key, string value)
        {
            Key = key;
            Value = value;
        }
    }

然而，当我设置绑定DataDource列出，没有出现在DataGridView的，它只是空的。任何人都知道为什么吗？

However, when I set the binding DataDource to list, nothing appears on the DataGridView, it's simply empty. Anyone know why?

推荐答案

首先，我不明白为什么要添加的所有键和值count次，从来没有使用的索引。

First, I don't understand why you are adding all the keys and values count times, Index is never used.

我试过了这个例子：

        var source = new BindingSource();
        List<MyStruct> list = new List<MyStruct> { new MyStruct("fff", "b"),  new MyStruct("c","d") };
        source.DataSource = list;
        grid.DataSource = source;

和工作pretty很好，我得到正确的名称两列。 MYSTRUCT类型公开的绑定机制可以使用属性。

and that work pretty well, I get two columns with the correct names. MyStruct type exposes properties that the binding mechanism can use.

    class MyStruct
   {
    public string Name { get; set; }
    public string Adres { get; set; }


    public MyStruct(string name, string adress)
    {
        Name = name;
        Adres = adress;
    }
  }

尝试建立一个类型，它有一个键和值，和一个添加之一。
希望这有助于。

Try to build a type that takes one key and value, and add it one by one. Hope this helps.

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