IComparer对数据绑定Datagridview进行排序 | IComparer对数据绑定Datagridview进行排序

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问题描述

我有一个数据绑定的DataGridView，我正在尝试使用IComparer进行排序.

I have a data-bound DataGridView that I am trying to sort using an IComparer.

当我尝试进行排序时，出现此错误:

When I try to apply my sort I get this error:

我的排序技术基于此链接.

仅供参考，我试图通过使用位图的标记值来比较位图.

Just an FYI I am trying to compare Bitmaps by using their tag values.

public int Compare(object x, object y)
{
    DataGridViewRow DataGridViewRow1 = (DataGridViewRow)x;
    DataGridViewRow DataGridViewRow2 = (DataGridViewRow)y;

    // Try to sort based on the tag
    int CompareResult = System.String.Compare(
        DataGridViewRow1.Cells[1].Tag.ToString(),
        DataGridViewRow2.Cells[1].Tag.ToString());



    return CompareResult * sortOrderModifier;
}

推荐答案

据我所知，无法使用链接文章上显示的方法对数据绑定的DatagridView进行排序.

As far as I know, databound DatagridView cannot be sorted using the methods shown on the linked article.

您想要做的是对基础容器进行排序.如果您使用的是数据表，则无法直接对其进行排序.

What you want to do is sort the underlying container. If you're using a DataTable, you can't sort it directly.

您可以做的是使用Linq的OrderBy并将其传递给您的自定义比较器.之后，在linq查询上调用AsDataView()并将您的DataGridView绑定到该DataView.

What you can do is use Linq's OrderBy and pass it your custom comparer. After that, call AsDataView() on your linq query and bind your DataGridView to this DataView.

类似这样的东西:

 RowComparer comp = new RowComparer();
 var query = northwindDataSet.Customers.AsEnumerable().OrderBy(q => q, comp);
 DataView dv = query.AsDataView();

 customersBindingSource.DataSource = dv;

请注意，在此示例中，我使用的是DataTable和BindingSource，但您应该了解一下:-)

Note that I'm using a DataTable and a BindingSource in this example, but you should get the idea :-)

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