C# 如何动态重新排序gridview中的列
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How to reorder columns in gridview dynamically
提问by Ragalante
Similar questions may exists, but none of them seems to be helpfull. So I'll try to explain a more specific case, and see if anyone can help me :)
可能存在类似的问题，但它们似乎都没有帮助。所以我会尝试解释一个更具体的案例，看看是否有人可以帮助我:)
Here is the thing, I have a gridview with templatefields, and I want to let the user to specify the order those columns are shown. So, the user creates a view and decides which column to display first, second, and so on.
事情就是这样，我有一个带有模板字段的 gridview，我想让用户指定这些列的显示顺序。因此，用户创建一个视图并决定首先显示哪一列，第二列等等。
So basically, I need to change the order of the columns just after the grid is loaded with data.
所以基本上，我需要在网格加载数据后更改列的顺序。
Sounds easy huh? Well, apparently it's not. At least I couldn't achieve that just yet.
听起来很容易吧？嗯，显然不是。至少我现在还做不到。
Some notes: - Of course I have AutogenerateColumns set to false. - Change the sql select columns order won't work because of previous item. - And I'd like not to generate the columns by the code.
一些注意事项： - 当然，我将 AutogenerateColumns 设置为 false。- 由于前一项，更改 sql 选择列顺序将不起作用。- 我不想通过代码生成列。
Any ideas?
有任何想法吗？
采纳答案by patmortech
You can modify the Gridview's Columns collection in your code-behind. So, one way of doing this is to remove the column from its current position in the collection and then re-insert it into the new position.
您可以在代码隐藏中修改 Gridview 的 Columns 集合。因此，执行此操作的一种方法是将列从集合中的当前位置移除，然后将其重新插入到新位置。
For example, if you wanted to move the second column to be the first column you could do:
例如，如果您想将第二列移动到第一列，您可以执行以下操作：
var columnToMove = myGridView.Columns[1];
myGridView.Columns.RemoveAt(1);
myGridView.Columns.Insert(0, columnToMove);
If you need to move them all around randomly, then you might want to try to clone the field collection, clear the collection in the GridView, and then re-insert them all in the order you want them to be in.
如果您需要随机移动它们，那么您可能需要尝试克隆字段集合，清除 GridView 中的集合，然后按照您希望它们的顺序重新插入它们。
var columns = myGridView.Columns.CloneFields();
myGridView.Columns.Clear();
myGridView.Columns.Add(columns[2]);
myGridView.Columns.Add(columns[0]);
etc..
I'm not 100% sure whether this all will work AFTER binding to data, so unless there's a reason not to, I'd do it in Page_Init or somewhere before binding.
我不是 100% 确定这一切是否会在绑定到数据后工作，所以除非有理由不这样做，否则我会在 Page_Init 或绑定前的某个地方进行。
回答by Steven
I know this is an really old question but the suggested answer did not solve the problem fully.
我知道这是一个非常古老的问题，但建议的答案并没有完全解决问题。
The ViewState for the GridView will failed after remove / add a dynamic column.
删除/添加动态列后，GridView 的 ViewState 将失败。
If you need to bind any event, like OnRowCommand and OnRowUpdating, such events will not be fired.
如果您需要绑定任何事件，例如 OnRowCommand 和 OnRowUpdating，则不会触发此类事件。
Edit:
编辑：
Look into this function if you need answers.
如果您需要答案，请查看此功能。
Protected Overrides Function CreateColumns(dataSource As PagedDataSource, useDataSource As Boolean) As ICollection
