如何使用C＃基于对象值查找行的索引？(How to find index of a row based on the object value using C#?)

如何使用C＃基于对象值查找行的索引？(How to find index of a row based on the object value using C#?)

我有一个datagridview，我想从中删除一个特定的行（datagridview不是数据绑定）。 要删除，我需要行的索引。 Datagridview项目都是对象。 此时，我所拥有的只是对象的id（属性）。 我想知道datagridview中行的索引，它包含id的对象，比如说2。

我该如何做到这一点？ 或者是否有另一种基于对象值删除行的方法？

I have a datagridview, and I want to remove a particular row from it (datagridview is not data bound). To remove, I need the index of the row. Datagridview items are all objects. At this moment, all I have is the id (a property) of the object. I want to know the index of the row in datagridview which holds the object of id, say 2.

How do I accomplish this? Or is there another way of deleting a row based on an object's value?

最满意答案

可能有一种更清洁的方式，但使用LINQ：

private int GetIndexOfRowWithId(DataGridView dataGrid, int id) { return dataGrid.Rows.Cast<MyRowObj>().Select((row, index) => new { index, row }).Where(x => x.row.id == id).Select(x => x.index).First(); }

没有LINQ：

private int GetIndexOfRowWithId(DataGridView dataGrid, int id) { for (int i = 0; i < dataGrid.Rows.Count; i += 1) { MyRowObj row = (MyRowObj)dataGrid.Rows[i].Tag; // or.DataBoundItem; if (row.id == id) { return i; } } throw new ArgumentException("No item with specified id exists in the dataGrid.", "id"); }

There's probably a cleaner way, but with LINQ:

private int GetIndexOfRowWithId(DataGridView dataGrid, int id) { return dataGrid.Rows.Cast<MyRowObj>().Select((row, index) => new { index, row }).Where(x => x.row.id == id).Select(x => x.index).First(); }

and without LINQ:

private int GetIndexOfRowWithId(DataGridView dataGrid, int id) { for (int i = 0; i < dataGrid.Rows.Count; i += 1) { MyRowObj row = (MyRowObj)dataGrid.Rows[i].Tag; // or.DataBoundItem; if (row.id == id) { return i; } } throw new ArgumentException("No item with specified id exists in the dataGrid.", "id"); }