如何使用自定义数据源时，隐藏的DataGridView的列？ [英] How to hide column of DataGridView when using custom DataSource?

问题描述

我在C＃中的小的应用程序，它有一个DataGridView，获取使用填充：

I have a small app in c#, it has a DataGridView that gets filled using:

grid.DataSource = MyDatasource阵列;

MyClass的持有结构，为列，它看起来是这样的：

MyClass hold the structure for the columns, it looks something like this:

class MyDatasource
{
    private string column1;        
    private string column2;

    public MyDatasource(string arg1, string arg2)
    {
        this.column1 = arg1;
        this.column2 = arg2;
    }

    public string column1
    {
        get
        {
            return this.column1;
        }
        set
        {
            this.column1 = value;
        }
    }

    public string column2
    {
        get
        {
            return this.column2;
        }
        set
        {
            this.column1 = value;
        }
    }
}

一切工作正常和DataGridView获取填入正确的数据，但现在我想隐藏的列2。我尝试添加 [可浏览（假）] 上面列声明，将其隐藏，但我也需要访问从code中的列值，而当我使用 [可浏览（假）] 并尝试读取它的行为，如果列不存在类似的内容。如果我不使用它，我可以读取没有问题的列，但它是可见在DataGridView。

Everything works fine and the DataGridView gets populated with the correct data, but now I want to hide the column2. I tried adding [Browsable(false)] above the column declaration, that will hide it, but I also need to access the column value from code, and when I use [Browsable(false)] and try to read the content it acts like if the column doesn't exist. If I don't use it I can read the column without problem but it's visible in the DataGridView.

我怎么能隐藏列，但仍然能够读取code的内容？

How could I hide the column but still be able to read its content from code?

推荐答案

在某些情况下，它可能是一个坏主意，先列添加到DataGridView，然后将其隐藏。

In some cases, it might be a bad idea to first add the column to the DataGridView and then hide it.

我比如有一个具有为公司标志的图像属性的NHibernate的代理类。如果我访问的属性（例如，通过调用其ToString方法显示在一个DataGridView），它会从SQL服务器下载图像。如果我有公司的对象的列表，并使用了作为像在DataGridView的数据源，然后（我怀疑），它会下载所有标识之前，我可以隐藏列。

I for example have a class that has an NHibernate proxy for an Image property for company logos. If I accessed that property (e.g. by calling its ToString method to show that in a DataGridView), it would download the image from the SQL server. If I had a list of Company objects and used that as the dataSource of the DataGridView like that, then (I suspect) it would download ALL the logos BEFORE I could hide the column.

要prevent这一点，我使用了自定义属性

To prevent this, I used the custom attribute

 [System.ComponentModel.Browsable(false)]

上的图像特性，使得在DataGridView忽略属性（不创建列和不调用的ToString方法）。

on the image property, so that the DataGridView ignores the property (doesn't create the column and doesn't call the ToString methods).

 public class Company
 {
     ...
     [System.ComponentModel.Browsable(false)]
     virtual public MyImageClass Logo { get; set;}

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