Question

我在c＃中有一个datagridview。数据源是List。所有的文件都被添加为列，最后我添加了另一列：DataGridViewLinkColumn，如果我进行刷新/重新加载，DataGridViewLinkColumn将被添加多次。任何帮助都会非常有用。

private void bidListToGridT(List<Item> list)
{
   dataGridView1.DataSource = null;
   dataGridView1.DataSource = list;
   dataGridView1.AutoGenerateColumns = false;
   dataGridView1.AllowUserToAddRows = false;
   int i = 1;
   foreach (DataGridViewRow row in dataGridView1.Rows)
   {
      row.Cells["NO"].Value = i;
      i++;
   }
   dataGridView1.Columns[1].HeaderText = "Id";
   dataGridView1.Columns[2].HeaderText = "Name";

   DataGridViewLinkColumn Deletelink = new DataGridViewLinkColumn();
   Deletelink.UseColumnTextForLinkValue = true;
   Deletelink.HeaderText = "Delet";
   Deletelink.DataPropertyName = "lnkColumn";
   Deletelink.LinkBehavior = LinkBehavior.SystemDefault;
   Deletelink.Text = "Delete";
   dataGridView1.Columns.Add(Deletelink);
   dataGridView1.Refresh();
}

Answer 1

要避免多次添加同一列，请在添加之前检查gridview中是否存在此列。要进行检查，您可以使用以下代码。

bool hasDeleteColumn=false;
foreach (DataGridViewColumn  item in dataGridView1.Columns)
    {
       if (item.GetType() == typeof(DataGridViewLinkColumn) && item.HeaderText=="Delete")
          {
              hasDeleteColumn = true;
              break;
          }
    }
if(!hasDeleteColumn)
  {
    // Adding columns if not existing
    DataGridViewLinkColumn Deletelink = new DataGridViewLinkColumn();
    Deletelink.UseColumnTextForLinkValue = true;
    Deletelink.HeaderText = "Delete";
    Deletelink.DataPropertyName = "lnkColumn";
    Deletelink.LinkBehavior = LinkBehavior.SystemDefault;
    Deletelink.Text = "Delete";
    dataGridView1.Columns.Add(Deletelink);
    dataGridView1.Refresh();
  }

刷新以从datagridview中删除所有数据c＃

1 个答案: