C#中將DataGridView的內容轉換為List

Question

獲取 DataGridView 的內容並將這些值放入 C# 中的列表的最佳方法是什么？

Answer 1

        List<MyItem> items = new List<MyItem>();
        foreach (DataGridViewRow dr in dataGridView1.Rows)
        {
            MyItem item = new MyItem();
            foreach (DataGridViewCell dc in dr.Cells)
            { 
                ...build out MyItem....based on DataGridViewCell.OwningColumn and DataGridViewCell.Value  
            }

            items.Add(item);
        }

Answer 2

如果使用DataSource綁定列表，則可以使用以下命令轉換回：

List<Class> myClass = DataGridView.DataSource as List<Class>;

Answer 3

或者是一種linq方式

var list = (from row in dataGridView1.Rows.Cast<DataGridViewRow>()
           from cell in row.Cells.Cast<DataGridViewCell>()
           select new 
           {
             //project into your new class from the row and cell vars.
           }).ToList();

Answer 4

var Result = dataGridView1.Rows.OfType<DataGridViewRow>().Select(
            r => r.Cells.OfType<DataGridViewCell>().Select(c => c.Value).ToArray()).ToList();

或者獲取值的字符串字典

var Result = dataGridView1.Rows.OfType<DataGridViewRow>().Select(
            r => r.Cells.OfType<DataGridViewCell>().ToDictionary(c => dataGridView1.Columns[c.OwningColumn].HeaderText, c => (c.Value ?? "").ToString()
                ).ToList();

Answer 5

IEnumerable.OfType<TResult>擴展方法可以成為你最好的朋友。 這是我如何通過LINQ查詢完成它：

List<MyItem> items = new List<MyItem>();
dataGridView1.Rows.OfType<DataGridViewRow>().ToList<DataGridViewRow>().ForEach(
                row =>
                {
                    foreach (DataGridViewCell cell in row.Cells)
                    {
                        //I've assumed imaginary properties ColName and ColValue in MyItem class
                        items.Add(new MyItem { ColName = cell.OwningColumn.Name, ColValue = cell.Value });
                    }
                });

Answer 6

VB：

Dim lst As List(Of DataGridViewRow) = Me.MasterDataGridView.Rows.Cast(Of DataGridViewRow).AsEnumerable.ToList

C＃：

List<DataGridViewRow> lst = this.MasterDataGridView.Rows.Cast<DataGridViewRow>.AsEnumerable.ToList;