我如何解决选定的一行问题？ [英] How I can solve selected one row problem?

问题描述

你好，我遇到了这个小问题。

我需要的是：



从datagrid复制一行。复制多行很好，效果很好。只有当我想要选择一行时，它才行不通。



这是代码：

Hello, i got this little problem.
What i need is:

Copy one row from datagrid. Copying multiple rows is fine and works very well. Only when i want select one row, it doesn´t work.

This is the code:

<pre lang="c#">
/// <summary>
        /// Method which will copy entire row.
        /// </summary>
        private void CopyRow(object obj)
        {
            var datagrid = obj as System.Windows.Controls.DataGrid;

            var valsCollection = new List<string>();

            foreach (ENotifiedTruck item in datagrid.SelectedItems)
            {
                valsCollection.Add(item.ToStringLP());
            }

            var rows = GetDataGridRows(datagrid);            
            int i1 = 1;
            bool selectedRows = false;

            foreach (DataGridRow r in rows)
            {
                DataGridColumn column = datagrid.Columns[0];
                TextBlock cellcontent = column.GetCellContent(r) as TextBlock;
                
                valsCollection[i1] = string.Format("{0}\t{1}", cellcontent.Text, valsCollection[i1]);
                i1++;            
            }
            
            
            datagrid.ClipboardCopyMode = DataGridClipboardCopyMode.IncludeHeader;
            valsCollection.Insert(0, string.Empty);
            ApplicationCommands.Copy.Execute(null, datagrid);
            string oldresult = (string)Clipboard.GetData(DataFormats.Text);

            List<string> rowCollection = new List<string>();
            rowCollection = oldresult.Split(new char[] { '\n' }).ToList<string>();

            if (rowCollection.Count == 0)
                return;

            string last = rowCollection[0];
            rowCollection = new List<string>();
            rowCollection.Add(last);
            rowCollection.AddRange(valsCollection);          

            oldresult = string.Join("\n", rowCollection);
            Clipboard.SetText($"{oldresult}");
        }


        public IEnumerable<DataGridRow> GetDataGridRows(System.Windows.Controls.DataGrid grid)
        {
            var itemsSource = grid.ItemsSource as IEnumerable;
            if (null == itemsSource) yield return null;
            foreach (var item in itemsSource)
            {
                var rows =  (DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(item);
                if (null != rows) yield return rows;                           
            }           
        }

对我来说，当我选择一行时会出现问题。在这一特定行：

我收到错误：

For me problem happen when i select one row. In this particular line:
I get error:

valsCollection[i1] = string.Format("{0}\t{1}", cellcontent.Text, valsCollection[i1]);

错误是：

The error is: "

"{Index was out of range. Must be non-negative and less than the size of the collection.\r\nParameter name: index"}

任意想法如何解决？谢谢！



我的尝试：



我试过做它通过selectedIndex，但它不起作用。

"

Any ideas how to solve it? Thanks!

What I have tried:

I tried to do it via selectedIndex, but it didn´t work.

推荐答案

{oldresult}）;
}


public IEnumerable< DataGridRow> GetDataGridRows（System.Windows.Controls.DataGrid grid）
{
var itemsSource = grid.ItemsSource as IEnumerable;
if（null == itemsSource）yield return null;
foreach（itemsSource中的var项）
{
var rows =（DataGridRow）grid.ItemContainerGenerator.ContainerFromItem（item）;
if（null！= rows）产生返回行;
}
}

"{oldresult}"); } public IEnumerable<DataGridRow> GetDataGridRows(System.Windows.Controls.DataGrid grid) { var itemsSource = grid.ItemsSource as IEnumerable; if (null == itemsSource) yield return null; foreach (var item in itemsSource) { var rows = (DataGridRow)grid.ItemContainerGenerator.ContainerFromItem(item); if (null != rows) yield return rows; } }

对我来说，当我选择一行时会出现问题。在这一特定行：

我收到错误：

For me problem happen when i select one row. In this particular line:
I get error:

valsCollection[i1] = string.Format("{0}\t{1}", cellcontent.Text, valsCollection[i1]);

错误是：

The error is: "

"{Index was out of range. Must be non-negative and less than the size of the collection.\r\nParameter name: index"}

任意想法如何解决？谢谢！



我的尝试：



我试过做它通过selectedIndex，但它不起作用。

"

Any ideas how to solve it? Thanks!

What I have tried:

I tried to do it via selectedIndex, but it didn´t work.

与.NET中的所有集合一样，数组索引从零开始，而不是一个：

Like all collections in .NET, array indexes start at zero, not one:

int i1 = 1;
...
foreach (DataGridRow r in rows)
{
    ...
    valsCollection[i1] = string.Format("{0}\t{1}", cellcontent.Text, valsCollection[i1]);

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